National Library of Energy BETA

Sample records for grinding steel coke

  1. Using Coke Oven Gas in a Blast Furnace Saves Over $6 Million Annually at a Steel Mill (U.S. Steel Edgar Thompson Plant)

    SciTech Connect (OSTI)

    2000-12-01

    Like most steel companies, U.S. Steel (USS) had been using coke oven gas (COG), a by-product of coke manufacturing, as a fuel in their coke ovens, boilers, and reheat furnaces.

  2. Ammonia removal process upgrade to the Acme Steel Coke Plant

    SciTech Connect (OSTI)

    Harris, J.L.

    1995-12-01

    The need to upgrade the ammonia removal process at the Acme Steel Coke Plant developed with the installation of the benzene NESHAP (National Emission Standard for Hazardous Air Pollutants) equipment, specifically the replacement of the final cooler. At Acme Steel it was decided to replace the existing open cooling tower type final cooler with a closed loop direct spray tar/water final cooler. This new cooler has greatly reduced the emissions of benzene, ammonia, hydrogen sulfide and hydrogen cyanide to the atmosphere, bringing them into environmental compliance. At the time of its installation it was not fully recognized as to the effect this would have on the coke oven gas composition. In the late seventies the decision had been made at Acme Steel to stop the production of ammonia sulfate salt crystals. The direction chosen was to make a liquid ammonia sulfate solution. This product was used as a pickle liquor at first and then as a liquid fertilizer as more markets were developed. In the fall of 1986 the ammonia still was brought on line. The vapors generated from the operation of the stripping still are directed to the inlet of the ammonia absorber. At that point in time it was decided that an improvement to the cyclical ammonia removal process was needed. The improvements made were minimal yet allowed the circulation of solution through the ammonia absorber on a continuous basis. The paper describes the original batch process and the modifications made which allowed continuous removal.

  3. Development of automatic operation system for coke oven machines at Yawata Works of Nippon Steel Corporation

    SciTech Connect (OSTI)

    Matsunaga, Masao; Uematsu, Hiroshi; Nakagawa, Yoji; Ishiharaguchi, Yuji

    1995-12-01

    The coke plant is a working environment involving heavy dust emissions, high heat and demanding physical labor. The labor-saving operation of the coke plant is an essential issue from the standpoints of not only improvement in working environment, but also reduction in fixed cost by enhancement of labor productivity. Under these circumstances, Nippon Steel has implemented the automation of coke oven machines. The first automatic operation system for coke oven machinery entered service at Oita Works in 1992, followed by the second system at the No. 5 coke oven battery of the coke plant at Yawata Works. The Yawata automatic operation system is characterized by the installation of coke oven machinery to push as many as 140 ovens per day within a short cycle time, such as a preliminary ascension pipe cap opening car and cycle time simulator by the manned operation of the pusher, which is advantageous from the standpoint of investment efficiency, and by the monitoring of other oven machines by the pusher. These measures helped to reduce the manpower requirement to 2 persons per shift from 4 persons per shift. The system entered commercial operation in March, 1994 and has been smoothly working with an average total automatic rate of 97%. Results from the startup to recent operation of the system are reported below.

  4. Air pollution from a large steel factory: polycyclic aromatic hydrocarbon emissions from coke-oven batteries

    SciTech Connect (OSTI)

    Lorenzo Liberti; Michele Notarnicola; Roberto Primerano; Paolo Zannetti

    2006-03-15

    A systematic investigation of solid and gaseous atmospheric emissions from some coke-oven batteries of one of Europe's largest integrated steel factory (Taranto, Italy) has been carried out. These emissions, predominantly diffuse, originate from oven leakages, as well as from cyclic operations of coal loading and coke unloading. In air monitoring samples, polycyclic aromatic hydrocarbons (PAHs) were consistently detected at concentrations largely exceeding threshold limit values. By means of PAHs speciation profile and benzo-(a)pyrene (BaP) equivalent dispersion modeling from diffuse sources, the study indicated that serious health risks exist not only in working areas, but also in a densely populated residential district near the factory. 30 refs., 5 figs., 3 tabs.

  5. Coke oven gas treatment and by-product plant of Magnitogorsk Integrated Iron and Steel Works

    SciTech Connect (OSTI)

    Egorov, V.N.; Anikin, G.J.; Gross, M.

    1995-12-01

    Magnitogorsk Integrated Iron and Steel Works, Russia, decided to erect a new coke oven gas treatment and by-product plant to replace the existing obsolete units and to improve the environmental conditions of the area. The paper deals with the technological concept and the design requirements. Commissioning is scheduled at the beginning of 1996. The paper describes H{sub 2}S and NH{sub 3} removal, sulfur recovery and ammonia destruction, primary gas cooling and electrostatic tar precipitation, and the distributed control system that will be installed.

  6. Improved wastewater treatment at Wheeling-Pittsburgh Steel Corporations`s Steubenville East Coke Plant

    SciTech Connect (OSTI)

    Goshe, A.J.; Nodianos, M.J.

    1995-12-01

    Wheeling-Pittsburgh Steel Corporation recently improved its wastewater treatment at it`s by-products coke plant. This has led to greatly improved effluent quality. Excess ammonia liquor, along with wastewater from the light oil recovery plant, desulfurization facility, and coal pile runoff, must be treated prior to being discharged into the Ohio River. This is accomplished using a biological wastewater treatment plant to remove 99.99% of the organic contaminants and ammonia. Biologically treated, clarified wastewater is now polished in the newly constructed tertiary treatment plant.

  7. The evaluation of the Nippon Steel Corporation reactivity and post-reaction-strength test for coke

    SciTech Connect (OSTI)

    Not Available

    1980-12-01

    A systematic investigation was made of the factors influencing the reactivity of coke, including test temperature, coke structural properties, mineral inclusions and additives, and the inert content of the charge.

  8. Blast furnace coke quality in relation to petroleum coke addition

    SciTech Connect (OSTI)

    Alvarez, R.; Diez, M.A.; Menendez, J.A.; Barriocanal, C.; Pis, J.J.; Sirgado, M.

    1995-12-01

    The incorporation of petroleum coke as an additive in industrial coking coal blends is a practice often used by steel companies. A suitable blast furnace coke produced by replacing part of the coking coal blend with a suitable petroleum coke (addition of 5 to 15%), was made by Great Lakes Carbon Corporation and successfully tested at several blast furnaces. This coke had lower reactivity, less ash and slightly higher sulfur content than coke made without the addition of petroleum coke. In contrast with these results, it has been reported in a BCRA study that additions of petroleum coke to a strong coking coal, above 5 wt%, increased coke reactivity. These differences may be explained on the basis of the coal or blend characteristics to which petroleum coke is added. Petroleum coke addition seems to give better results if the coal/blend has high fluidity. The present situation in Spain is favorable for the use of petroleum coke. So, a study of laboratory and semi-industrial scale was made to assess the possibility of using petroleum coke as an additive to the typical industrial coal blend coked by the Spanish Steel Company, ENSIDESA. The influence of the petroleum coke particle size was also studied to semi-industrial scale.

  9. Heating control methodology in coke oven battery at Rourkela Steel Plant

    SciTech Connect (OSTI)

    Bandyopadhyay, S.S.; Parthasarathy, L.; Gupta, A.; Bose, P.R.; Mishra, U.

    1996-12-31

    A methodology of heating control was evolved incorporating temperature data generated through infra-red sensor at quenching station and thermocouples specially installed in the gooseneck of coke oven battery No. 3 of RSP. Average temperature of the red-hot coke as pushed helps in diagnosis of the abnormal ovens and in setting the targeted battery temperature. A concept of coke readiness factor (Q) was introduced which on optimization resulted in lowering the specific heat consumption by 30 KCal/Kg.

  10. Simulation of industrial coking -- Phase 1

    SciTech Connect (OSTI)

    Todoschuk, T.W.; Price, J.T.; Gransden, J.F.

    1997-12-31

    Two statistically designed experimental programs using an Appalachian and a Western Canadian coal blend were run in CANMET`s 460mm (18 inch) movable wall oven. Factors included coal grind, moisture, oil addition, carbonization rate and final coke temperature. Coke quality parameters including CSR, coal charge characteristics and pressure generation were analyzed.

  11. Grinding away

    SciTech Connect (OSTI)

    Korz, T.

    2009-03-15

    Coal preparation in gasification plants is all too often neglected. The coal gasification industry has experienced enormous growth over the last few years and consequently the demand of coal grinding and drying has also increased. The design and development of coal mills has taken great strides since the first coal grinding plant was delivered to an IGCC power plant in Buggenum, Netherlands. The article describes a typical flow sheet for a coal gasification plant with a possibility of feeding the mill with different types of materials besides coal. 5 figs.

  12. Clean Production of Coke from Carbonaceous Fines

    SciTech Connect (OSTI)

    Craig N. Eatough

    2004-11-16

    In order to produce steel (a necessary commodity in developed nations) using conventional technologies, you must have metallurgical coke. Current coke-making technology pyrolyzes high-quality coking coals in a slot oven, but prime coking coals are becoming more expensive and slot ovens are being shut-down because of age and environmental problems. The United States typically imports about 4 million tons of coke per year, but because of a world-wide coke scarcity, metallurgical coke costs have risen from about $77 per tonne to more than $225. This coke shortage is a long-term challenge driving up the price of steel and is forcing steel makers to search for alternatives. Combustion Resources (CR) has developed a technology to produce metallurgical coke from alternative feedstocks in an environmentally clean manner. The purpose of the current project was to refine material and process requirements in order to achieve improved economic benefits and to expand upon prior work on the proposed technology through successful prototype testing of coke products. The ultimate objective of this project is commercialization of the proposed technology. During this project period, CR developed coke from over thirty different formulations that meet the strength and reactivity requirements for use as metallurgical coke. The technology has been termed CR Clean Coke because it utilizes waste materials as feedstocks and is produced in a continuous process where pollutant emissions can be significantly reduced compared to current practice. The proposed feed material and operating costs for a CR Clean Coke plant are significantly less than conventional coke plants. Even the capital costs for the proposed coke plant are about half that of current plants. The remaining barrier for CR Clean Coke to overcome prior to commercialization is full-scale testing in a blast furnace. These tests will require a significant quantity of product (tens of thousands of tons) necessitating the construction

  13. Improved tool grinding machine

    DOE Patents [OSTI]

    Dial, C.E. Sr.

    The present invention relates to an improved tool grinding mechanism for grinding single point diamond cutting tools to precise roundness and radius specifications. The present invention utilizes a tool holder which is longitudinally displaced with respect to the remainder of the grinding system due to contact of the tool with the grinding surface with this displacement being monitored so that any variation in the grinding of the cutting surface such as caused by crystal orientation or tool thicknesses may be compensated for during the grinding operation to assure the attainment of the desired cutting tool face specifications.

  14. Tool grinding machine

    DOE Patents [OSTI]

    Dial, Sr., Charles E.

    1980-01-01

    The present invention relates to an improved tool grinding mechanism for grinding single point diamond cutting tools to precise roundness and radius specifications. The present invention utilizes a tool holder which is longitudinally displaced with respect to the remainder of the grinding system due to contact of the tool with the grinding surface with this displacement being monitored so that any variation in the grinding of the cutting surface such as caused by crystal orientation or tool thickness may be compensated for during the grinding operation to assure the attainment of the desired cutting tool face specifications.

  15. Coke oven gas injection to blast furnaces

    SciTech Connect (OSTI)

    Maddalena, F.L.; Terza, R.R.; Sobek, T.F.; Myklebust, K.L.

    1995-12-01

    U.S. Steel has three major facilities remaining in Pennsylvania`s Mon Valley near Pittsburgh. The Clairton Coke Works operates 12 batteries which produce 4.7 million tons of coke annually. The Edgar Thomson Works in Braddock is a 2.7 million ton per year steel plant. Irvin Works in Dravosburg has a hot strip mill and a range of finishing facilities. The coke works produces 120 mmscfd of coke oven gas in excess of the battery heating requirements. This surplus gas is used primarily in steel re-heating furnaces and for boiler fuel to produce steam for plant use. In conjunction with blast furnace gas, it is also used for power generation of up to 90 MW. However, matching the consumption with the production of gas has proved to be difficult. Consequently, surplus gas has been flared at rates of up to 50 mmscfd, totaling 400 mmscf in several months. By 1993, several changes in key conditions provided the impetus to install equipment to inject coke oven gas into the blast furnaces. This paper describes the planning and implementation of a project to replace natural gas in the furnaces with coke oven gas. It involved replacement of 7 miles of pipeline between the coking plants and the blast furnaces, equipment capable of compressing coke oven gas from 10 to 50 psig, and installation of electrical and control systems to deliver gas as demanded.

  16. The correlation between reactivity and ash mineralogy of coke

    SciTech Connect (OSTI)

    Kerkkonen, O.; Mattila, E.; Heiniemi, R.

    1996-12-31

    Rautaruukki is a modern integrated Finnish steel works having a production of 2.4 mil. t/year of flat products. The total fuel consumption of the two blast furnaces in 1994 was 435 kg/t HM. Coke used was 345 kg/t HM and oil injection was 90 kg/t HM. The coking plant was taken in to operation in 1987 and is the only one in Finland, which means that the coking tradition is very short. Coke production is 0.9 mil. t/year. The coking blends include 70--80% medium volatile coals having a wide range of total dilatation. From time to time disturbances in the operation of the blast furnaces have occurred in spite of the fact that the reactivity of the coke used has remained constant or even decreased. It was thought necessary to investigate the factors affecting coke reactivity, in order to better understand the results of the reactivity test. This paper deals with carbonization tests done in a 7 kg test oven using nine individual coals having volatile-matter contents of 17--36% (dry) and seven blends made from these coals. Coke reactivity with CO{sub 2} at 1100 C (CRI) and coke strength after reaction (CSR) were determined using the test developed by the Nippon Steel Corporation. The influence of coke carbon form, porosity and especially ash mineralogy on the coke reactivity were examined. The effects of some additives; petroleum coke (pet coke), the spillage material from the coke ovens and oxidized coal, on coke quality were also studied. Typical inorganic minerals found in coals were added to one of the high volatile coals, which was then coked to determine the affect of the minerals on the properties of the coke produced.

  17. Conduit grinding apparatus

    DOE Patents [OSTI]

    Nachbar, Henry D.; Korytkowski, Alfred S.

    1991-01-01

    A grinding apparatus for grinding the interior portion of a valve stem receiving area of a valve. The apparatus comprises a faceplate, a plurality of cams mounted to an interior face of the faceplate, a locking bolt to lock the faceplate at a predetermined position on the valve, a movable grinder and a guide tube for positioning an optical viewer proximate the area to be grinded. The apparatus can either be rotated about the valve for grinding an area of the inner diameter of a valve stem receiving area or locked at a predetermined position to grind a specific point in the receiving area.

  18. Grinding Wheel System

    DOE Patents [OSTI]

    Malkin, Stephen; Gao, Robert; Guo, Changsheng; Varghese, Biju; Pathare, Sumukh

    2003-08-05

    A grinding wheel system includes a grinding wheel with at least one embedded sensor. The system also includes an adapter disk containing electronics that process signals produced by each embedded sensor and that transmits sensor information to a data processing platform for further processing of the transmitted information.

  19. Grinding Wheel System

    DOE Patents [OSTI]

    Malkin, Stephen; Gao, Robert; Guo, Changsheng; Varghese, Biju; Pathare, Sumukh

    2006-01-10

    A grinding wheel system includes a grinding wheel with at least one embedded sensor. The system also includes an adapter disk containing electronics that process signals produced by each embedded sensor and that transmits sensor information to a data processing platform for further processing of the transmitted information.

  20. Demand for superpremium needle cokes on upswing

    SciTech Connect (OSTI)

    Acciarri, J.A.; Stockman, G.H. )

    1989-12-01

    The authors discuss how recent supply shortages of super-premium quality needle cokes, plus the expectation of increased shortfalls in the future, indicate that refiners should consider upgrading their operations to fill these demands. Calcined, super-premium needle cokes are currently selling for as much as $550/metric ton, fob producer, and increasing demand will continue the upward push of the past year. Needle coke, in its calcined form, is the major raw material in the manufacture of graphite electrodes. Used in steelmaking, graphite electrodes are the electrical conductors that supply the heat source, through arcing electrode column tips, to electric arc steel furnaces. Needle coke is commercially available in three grades - super premium, premium, and intermediate. Super premium is used to produce electrodes for the most severe electric arc furnace steelmaking applications, premium for electrodes destined to less severe operations, and intermediate for even less critical needs.

  1. Improve grinding control

    SciTech Connect (OSTI)

    Burger, J.R.

    1985-06-01

    The on-stream particle analyzer is an instrument with many potential uses. The most common practice in mineral benefication is to use it to monitor grinding mill discharge after the pulp has passed through a classifying cyclone. The instrument samples and analyzes the cyclone overflow. The resulting signal can be used to automatically adjust grinding variables or the data readout can be used to guide manual changes. The design of the Armco PSM-400 and its operation are described.

  2. Factors affecting coking pressures in tall coke ovens

    SciTech Connect (OSTI)

    Grimley, J.J.; Radley, C.E.

    1995-12-01

    The detrimental effects of excessive coking pressures, resulting in the permanent deformation of coke oven walls, have been recognized for many years. Considerable research has been undertaken worldwide in attempts to define the limits within which a plant may safely operate and to quantify the factors which influence these pressures. Few full scale techniques are available for assessing the potential of a coal blend for causing wall damage. Inference of dangerous swelling pressures may be made however by the measurement of the peak gas pressure which is generated as the plastic layers meet and coalesce at the center of the oven. This pressure is referred to in this report as the carbonizing pressure. At the Dawes Lane cokemaking plant of British Steel`s Scunthorpe Works, a large database has been compiled over several years from the regulator measurement of this pressure. This data has been statistically analyzed to provide a mathematical model for predicting the carbonizing pressure from the properties of the component coals, the results of this analysis are presented in this report.

  3. Western Canadian coking coals -- Thermal rheology and coking quality

    SciTech Connect (OSTI)

    Leeder, W.R.; Price, J.T.; Gransden, J.F.

    1997-12-31

    Methods of predicting coke strength developed from the thermal rheological properties of Carboniferous coals frequently indicate that Cretaceous coals would not make high quality coke -- yet both types of coals produce coke suitable for the iron blast furnace. This paper will discuss the reasons why Western Canadian coals exhibit lower rheological values and how to predict the strength of coke produced from them.

  4. Model based control of a coke battery

    SciTech Connect (OSTI)

    Stone, P.M.; Srour, J.M.; Zulli, P.; Cunningham, R.; Hockings, K.

    1997-12-31

    This paper describes a model-based strategy for coke battery control at BHP Steel`s operations in Pt Kembla, Australia. The strategy uses several models describing the battery thermal and coking behavior. A prototype controller has been installed on the Pt Kembla No. 6 Battery (PK6CO). In trials, the new controller has been well accepted by operators and has resulted in a clear improvement in battery thermal stability, with a halving of the standard deviation of average battery temperature. Along with other improvements to that battery`s operations, this implementation has contributed to a 10% decrease in specific battery energy consumption. A number of enhancements to the low level control systems on that battery are currently being undertaken in order to realize further benefits.

  5. How to implement a quality program in a coking plant. The AHMSA experience

    SciTech Connect (OSTI)

    Reyes M, M.A.; Perez, J.L.; Garza, C. de la; Morales, M.

    1995-12-01

    AHMSA (Altos Hornos de Mexico) is the largest integrated Steel Plant in Mexico, with its 3.1 MMMT of Liquid Steel production program for 1995. AHMSA operates two coke plants which began operations in 1955 and 1976. Total coke monthly production capacity amounts to as much as 106,000 Metric Tons (MT). The coke plants working philosophy was discussed and established in 1986 as part of the Quality Improvement Program, where its ultimate goal is to give the best possible coke quality to its main client--the blast furnaces. With this goal in mind, a planned joint effort with their own coal mines was initiated. This paper deals with the implementation process of the Quality Program, and the results of this commitment at the coal mines, coke plants and blast furnaces. The coke quality improvement is shown since 1985 to 1994, as well as the impact on the blast furnace operation.

  6. Coking and gasification process

    DOE Patents [OSTI]

    Billimoria, Rustom M.; Tao, Frank F.

    1986-01-01

    An improved coking process for normally solid carbonaceous materials wherein the yield of liquid product from the coker is increased by adding ammonia or an ammonia precursor to the coker. The invention is particularly useful in a process wherein coal liquefaction bottoms are coked to produce both a liquid and a gaseous product. Broadly, ammonia or an ammonia precursor is added to the coker ranging from about 1 to about 60 weight percent based on normally solid carbonaceous material and is preferably added in an amount from about 2 to about 15 weight percent.

  7. High coking value pitch

    SciTech Connect (OSTI)

    Miller, Douglas J.; Chang, Ching-Feng; Lewis, Irwin C.; Lewis, Richard T.

    2014-06-10

    A high coking value pitch prepared from coal tar distillate and has a low softening point and a high carbon value while containing substantially no quinoline insolubles is disclosed. The pitch can be used as an impregnant or binder for producing carbon and graphite articles.

  8. Effects of surface grinding conditions on the reciprocating friction and wear behavior of silicon nitride

    SciTech Connect (OSTI)

    Blau, P.J.; Martin, R.L.; Zanoria, E.S.

    1997-12-31

    The relationship between two significantly different surface grinding conditions and the reciprocating ball-on-flat friction and wear behavior of a high-quality, structural silicon nitride material (GS-44) was investigated. The slider materials were silicon nitride NBD 200 and 440C stainless steel. Two machining conditions were selected based on extensive machining and flexural strength test data obtained under the auspices of an international, interlaboratory grinding study. The condition categorized as {open_quotes}low strength{close_quote} grinding used a coarse 80 grit wheel and produced low flexure strength due to machining-induced flaws in the surface. The other condition, regarded as {open_quotes}high strength grinding,{close_quotes} utilized a 320 grit wheel and produced a flexural strength nearly 70% greater. Grinding wheel surface speeds were 35 and 47 m/s. Reciprocating sliding tests were conducted following the procedure described in a newly-published ASTM standard (G- 133) for linearly-reciprocating wear. Tests were performed in directions both parallel and perpendicular to the grinding marks (lay) using a 25 N load, 5 Hz reciprocating frequency, 10 mm stroke length, and 100 m of sliding at room temperature. The effects of sliding direction relative to the lay were more pronounced for stainless steel than for silicon nitride sliders. The wear of stainless steel was less than the wear of the silicon nitride slider materials because of the formation of transfer particles which covered the sharp edges of the silicon nitride grinding grooves and reduced abrasive contact. The wear of the GS-44 material was much greater for the silicon nitride sliders than for the stainless steel sliders. The causes for the effects of surface-grinding severity and sliding direction on friction and wear of GS-44 and its counterface materials are explained.

  9. Comparison of Materials for Use in the Precision Grinding of...

    Office of Scientific and Technical Information (OSTI)

    Grinding of Optical Components Citation Details In-Document Search Title: Comparison of Materials for Use in the Precision Grinding of Optical Components Precision grinding of ...

  10. Treatment of petroleum cokes to inhibit coke puffing

    SciTech Connect (OSTI)

    Orac, T.H.; Quandt, H.C.; Ball, D.R.

    1992-06-02

    This patent describes apparatus for treating raw petroleum coke particles. It comprises an elongated, cylindrical, calcining kiln having an inlet end and an outlet end; and entrance chamber and a discharge chamber, an elongated, cylindrical, cooler having an inlet end and an outlet end; means defining a retention chamber communicating with the discharge chamber; means defining a hot zone communicating with the retention chamber and the inlet end of the cooler; means for introducing a dry, granulated, puffing inhibitor into the retention chamber in contact with the calcined coke particles; and a coke delivery chamber for collecting the cooled, calcined coke particles at the outlet end of the cooler.

  11. COKEMASTER: Coke plant management system

    SciTech Connect (OSTI)

    Johanning, J.; Reinke, M.

    1996-12-31

    To keep coke utilization in ironmaking as competitive as possible, the potential to improve the economics of coke production has to be utilized. As one measure to meet this need of its customers, Krupp Koppers has expanded its existing ECOTROL computer system for battery heating control to a comprehensive Coke Plant Management System. Increased capacity utilization, lower energy consumption, stabilization of plant operation and ease of operation are the main targets.

  12. Ceramic-bonded abrasive grinding tools

    DOE Patents [OSTI]

    Holcombe, Jr., Cressie E.; Gorin, Andrew H.; Seals, Roland D.

    1994-01-01

    Abrasive grains such as boron carbide, silicon carbide, alumina, diamond, cubic boron nitride, and mullite are combined with a cement primarily comprised of zinc oxide and a reactive liquid setting agent and solidified into abrasive grinding tools. Such grinding tools are particularly suitable for grinding and polishing stone, such as marble and granite.

  13. Ceramic-bonded abrasive grinding tools

    DOE Patents [OSTI]

    Holcombe, C.E. Jr.; Gorin, A.H.; Seals, R.D.

    1994-11-22

    Abrasive grains such as boron carbide, silicon carbide, alumina, diamond, cubic boron nitride, and mullite are combined with a cement primarily comprised of zinc oxide and a reactive liquid setting agent and solidified into abrasive grinding tools. Such grinding tools are particularly suitable for grinding and polishing stone, such as marble and granite.

  14. Coke from coal and petroleum

    DOE Patents [OSTI]

    Wynne, Jr., Francis E.; Lopez, Jaime; Zaborowsky, Edward J.

    1981-01-01

    A carbonaceous coke is manufactured by the delayed coking of a slurry mixture of from about 10 to about 30 weight percent of caking or non-caking coal and the remainder a petroleum resid blended at below 50.degree. C.

  15. Grinding assembly, grinding apparatus, weld joint defect repair system, and methods

    DOE Patents [OSTI]

    Larsen, Eric D.; Watkins, Arthur D.; Bitsoi, Rodney J.; Pace, David P.

    2005-09-27

    A grinding assembly for grinding a weld joint of a workpiece includes a grinder apparatus, a grinder apparatus includes a grinding wheel configured to grind the weld joint, a member configured to receive the grinding wheel, the member being configured to be removably attached to the grinder apparatus, and a sensor assembly configured to detect a contact between the grinding wheel and the workpiece. The grinding assembly also includes a processing circuitry in communication with the grinder apparatus and configured to control operations of the grinder apparatus, the processing circuitry configured to receive weld defect information of the weld joint from an inspection assembly to create a contour grinding profile to grind the weld joint in a predetermined shape based on the received weld defect information, and a manipulator having an end configured to carry the grinder apparatus, the manipulator further configured to operate in multiple dimensions.

  16. Gas treatment and by-products recovery of Thailand`s first coke plant

    SciTech Connect (OSTI)

    Diemer, P.E.; Seyfferth, W.

    1997-12-31

    Coke is needed in the blast furnace as the main fuel and chemical reactant and the main product of a coke plant. The second main product of the coke plant is coke oven gas. During treatment of the coke oven gas some coal chemicals like tar, ammonia, sulphur and benzole can be recovered as by-products. Since the market prices for these by-products are rather low and often erratic it does not in most cases justify the investment to recover these products. This is the reason why modern gas treatment plants only remove those impurities from the crude gas which must be removed for technical and environmental reasons. The cleaned gas, however, is a very valuable product as it replaces natural gas in steel work furnaces and can be used by other consumers. The surplus can be combusted in the boiler of a power plant. A good example for an optimal plant layout is the new coke oven facility of Thai Special Steel Industry (TSSI) in Rayong. The paper describes the TSSI`s coke oven gas treatment plant.

  17. Method for grinding precision components

    DOE Patents [OSTI]

    Ramanath, Srinivasan; Kuo, Shih Yee; Williston, William H.; Buljan, Sergej-Tomislav

    2000-01-01

    A method for precision cylindrical grinding of hard brittle materials, such as ceramics or glass and composites comprising ceramics or glass, provides material removal rates as high as 19-380 cm.sup.3 /min/cm. The abrasive tools used in the method comprise a strong, light weight wheel core bonded to a continuous rim of abrasive segments containing superabrasive grain in a dense metal bond matrix.

  18. Development of advanced technology of coke oven gas drainage treatment

    SciTech Connect (OSTI)

    Higashi, Tadayuki; Yamaguchi, Akikazu; Ikai, Kyozou; Kamiyama, Hisarou; Muto, Hiroshi

    1996-12-31

    In April 1994, commercial-scale application of ozone oxidation to ammonia liquor (which is primarily the water condensing from coke oven gas) to reduce its chemical oxygen demand (COD) was started at the Nagoya Works of Nippon Steel Corporation. This paper deals with the results of technical studies on the optimization of process operating conditions and the enlargement of equipment size and the operating purification system.

  19. Precision diamond grinding of ceramics and glass

    SciTech Connect (OSTI)

    Smith, S.; Paul, H.; Scattergood, R.O.

    1988-12-01

    A new research initiative will be undertaken to investigate the effect of machine parameters and material properties on precision diamond grinding of ceramics and glass. The critical grinding depth to initiate the plastic flow-to-brittle fracture regime will be directly measured using plunge-grind tests. This information will be correlated with machine parameters such as wheel bonding and diamond grain size. Multiaxis grinding tests will then be made to provide data more closely coupled with production technology. One important aspect of the material property studies involves measuring fracture toughness at the very short crack sizes commensurate with grinding damage. Short crack toughness value`s can be much less than the long-crack toughness values measured in conventional fracture tests.

  20. Guangzhou ChienSong Grind Material | Open Energy Information

    Open Energy Info (EERE)

    Guangzhou ChienSong Grind Material Jump to: navigation, search Name: Guangzhou ChienSong Grind Material Place: Guangdong Province, China Sector: Solar Product: Chinese supplier of...

  1. Automatic grinding apparatus to control uniform specimen thicknesses

    DOE Patents [OSTI]

    Bryner, J.S.

    1981-01-07

    This invention is directed to a new and improved grinding apparatus comprisng: (1) a movable grinding surface; (2) a specimen holder; (3) a dislacing means for moving the holder and/or grinding surface toward one another; and (4) at least three means for limiting displacement of the holder to the grinding surface.

  2. Automatic grinding apparatus to control uniform specimen thicknesses

    DOE Patents [OSTI]

    Bryner, Joseph S.

    1982-01-01

    This invention is directed to a new and improved grinding apparatus comprising (1) a movable grinding surface, (2) a specimen holder, (3) a displacing device for moving the holder and/or grinding surface toward one another, and (4) at least three devices for limiting displacement of the holder to the grinding surface.

  3. Mathematical modeling of clearance between wall of coke oven and coke cake

    SciTech Connect (OSTI)

    Nushiro, K.; Matsui, T.; Hanaoka, K.; Igawa, K.; Sorimachi, K.

    1995-12-01

    A mathematical model was developed for estimating the clearance between the wall of the coke oven and the coke cake. The prediction model is based on the balance between the contractile force and the coking pressure. A clearance forms when the contractile force exceeds the coking pressure in this model. The contractile force is calculated in consideration of the visco-elastic behavior of the thermal shrinkage of the coke. The coking pressure is calculated considering the generation and dispersion of gas in the melting layer. The relaxation time off coke used in this model was obtained with a dilatometer under the load application. The clearance was measured by the laser sensor, and the internal gas pressure was measured in a test oven. The clearance calculated during the coking process were in good agreement with the experimental results, which supported the validity of the mathematical model.

  4. Inhibition of coke formation in pyrolysis furnaces

    SciTech Connect (OSTI)

    Tong, Y.; Poindexter, M.K.; Rowe, C.T.

    1995-12-31

    Coke formation in pyrolysis furnaces, which thermally convert hydrocarbons to ethylene as well as other useful products, adversely affects product yields, causes furnace down time for coke removal, and shortens furnace coil life. A phosphorus-based chemical treatment program was developed to inhibit the coke formation. The anticoking performance of the phosphorus-based treatment program was studied using a bench scale coking rate measurement apparatus. The programs`s influence on coke morphology and reactor surface was addressed using SEM/EDX surface characterization techniques. For comparison, similar studies were carried out with sulfur-containing species which are conventionally used in industrial practice as furnace additives. The present work demonstrated that the phosphorus-based treatment program provided an efficient and durable surface passivation against coke formation.

  5. Coke cake behavior under compressive forces

    SciTech Connect (OSTI)

    Watakabe, S.; Takeda, T.; Itaya, H.; Suginobe, H.

    1997-12-31

    The deformation of the coke cake and load on the side wall during pushing were studied using an electric furnace equipped with a movable wall. Coke cake was found to deform in three stages under compressive forces. The coke cake was shortened in the pushing direction in the cake deformation stage, and load was generated on the side walls in the high wall load stage. Secondary cracks in the coke cake were found to prevent load transmission on the wall. The maximum load transmission rate was controlled by adjusting the maximum fluidity and mean reflectance of the blended coal.

  6. Collector main replacement at Indianapolis Coke

    SciTech Connect (OSTI)

    Sickle, R.R. Van

    1997-12-31

    Indianapolis Coke is a merchant coke producer, supplying both foundry and blast furnace coke to the industry. The facility has three coke batteries: two 3 meter batteries, one Wilputte four divided and one Koppers Becker. Both batteries are underjet batteries and are producing 100% foundry coke at a net coking time of 30.6 hours. This paper deals with the No. 1 coke battery, which is a 72 oven, gun fired, 5 meter Still battery. No. 1 battery produces both foundry and blast furnace coke at a net coking rate of 25.4 hours. No. 1 battery was commissioned in 1979. The battery is equipped with a double collector main. Although many renovations have been completed to the battery, oven machinery and heating system, to date no major construction projects have taken place. Deterioration of the collector main was caused in part from elevated levels of chlorides in the flushing liquor, and temperature fluctuations within the collector main. The repair procedures are discussed.

  7. Coke County, Texas: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    Zone Subtype B. Places in Coke County, Texas Blackwell, Texas Bronte, Texas Robert Lee, Texas Retrieved from "http:en.openei.orgwindex.php?titleCokeCounty,Texas&oldid...

  8. Comparison of Materials for Use in the Precision Grinding of...

    Office of Scientific and Technical Information (OSTI)

    diamond turning and grinding platform was used to grind surfaces in 40mm diameter substrates sapphire and silicon carbide substrates and 200 mm BK7 glass substrates using diamond ...

  9. Precision replenishable grinding tool and manufacturing process

    DOE Patents [OSTI]

    Makowiecki, Daniel M.; Kerns, John A.; Blaedel, Kenneth L.; Colella, Nicholas J.; Davis, Pete J.; Juntz, Robert S.

    1998-01-01

    A reusable grinding tool consisting of a replaceable single layer of abrasive particles intimately bonded to a precisely configured tool substrate, and a process for manufacturing the grinding tool. The tool substrate may be ceramic or metal and the abrasive particles are preferably diamond, but may be cubic boron nitride. The manufacturing process involves: coating a configured tool substrate with layers of metals, such as titanium, copper and titanium, by physical vapor deposition (PVD); applying the abrasive particles to the coated surface by a slurry technique; and brazing the abrasive particles to the tool substrate by alloying the metal layers. The precision control of the composition and thickness of the metal layers enables the bonding of a single layer or several layers of micron size abrasive particles to the tool surface. By the incorporation of an easily dissolved metal layer in the composition such allows the removal and replacement of the abrasive particles, thereby providing a process for replenishing a precisely machined grinding tool with fine abrasive particles, thus greatly reducing costs as compared to replacing expensive grinding tools.

  10. Precision replenishable grinding tool and manufacturing process

    DOE Patents [OSTI]

    Makowiecki, D.M.; Kerns, J.A.; Blaedel, K.L.; Colella, N.J.; Davis, P.J.; Juntz, R.S.

    1998-06-09

    A reusable grinding tool consisting of a replaceable single layer of abrasive particles intimately bonded to a precisely configured tool substrate, and a process for manufacturing the grinding tool are disclosed. The tool substrate may be ceramic or metal and the abrasive particles are preferably diamond, but may be cubic boron nitride. The manufacturing process involves: coating a configured tool substrate with layers of metals, such as titanium, copper and titanium, by physical vapor deposition (PVD); applying the abrasive particles to the coated surface by a slurry technique; and brazing the abrasive particles to the tool substrate by alloying the metal layers. The precision control of the composition and thickness of the metal layers enables the bonding of a single layer or several layers of micron size abrasive particles to the tool surface. By the incorporation of an easily dissolved metal layer in the composition such allows the removal and replacement of the abrasive particles, thereby providing a process for replenishing a precisely machined grinding tool with fine abrasive particles, thus greatly reducing costs as compared to replacing expensive grinding tools. 11 figs.

  11. Rheology of petroleum coke-water slurry

    SciTech Connect (OSTI)

    Prasad, M.; Mall, B.K.; Mukherjee, A.; Basu, S.K.; Verma, S.K.; Narasimhan, K.S.

    1998-07-01

    This paper reports the results of the studies carried out on the optimization of particle size distribution, the rheological characteristics and stability of highly loaded petroleum coke-water slurry using three additives. The solids loading achieved in the slurries were in the range of 65% to 75.6% depending on the additives used. Slurry viscosity varied between 267 to 424 mPas at 128 s{sup {minus}} shear rate. The petroleum coke-water slurries exhibited pseudoplastic characteristics with yield tending towards Bingham plastic as the solids loading progressively increased. The effect of addition of petroleum coke to the extent of 25% in coal-water slurry prepared from low ash Ledo coal of Makum field in Assam was also examined. The slurry containing coal-petroleum coke blend showed better stability, having shelf life of 7 days as compared to 5 days in the case of petroleum coke-water slurry.

  12. Coke formation in visbreaking process

    SciTech Connect (OSTI)

    Yan, T.Y. )

    1987-04-01

    Visbreaking is a mild cracking process primarily used to reduce residual oil viscosity and thus decrease the amount of cutter stock required for blending to heavy fuels specification. It can also be used to produce incremental quantities of gasoline, middle distillates and catalytic cracker feeds. This process was widely used in the 1930s and 1940s and became obsolete until a few years ago. When the need for increased conversion of residues to light products became desirable, visbreaking offered economic advantages to many refining schemes - especially in Western Europe. Between 1978-1981, Exxon brought on stream seven visbreakers ranging from 1900 to 9100 tons/SD capacity. In January 1983, the world-wide visbreaking capacity was over 2 MM B/SD. The visbreaking process and its application in refinery operations have been well described. In general, the process economics improve as the process severity is increased but it is limited by coke formation in the process. For this reason, they have studied the kinetics of coke formation in the visbreaking process.

  13. Determination of electrical resistivity of dry coke beds

    SciTech Connect (OSTI)

    Eidem, P.A.; Tangstad, M.; Bakken, J.A.

    2008-02-15

    The electrical resistivity of the coke bed is of great importance when producing FeMn, SiMn, and FeCr in a submerged arc furnace. In these processes, a coke bed is situated below and around the electrode tip and consists of metallurgical coke, slag, gas, and metal droplets. Since the basic mechanisms determining the electrical resistivity of a coke bed is not yet fully understood, this investigation is focused on the resistivity of dry coke beds consisting of different carbonaceous materials, i.e., coke beds containing no slag or metal. A method that reliably compares the electrical bulk resistivity of different metallurgical cokes at 1500{sup o} C to 1600{sup o}C is developed. The apparatus is dimensioned for industrial sized materials, and the electrical resistivity of anthracite, charcoal, petroleum coke, and metallurgical coke has been measured. The resistivity at high temperatures of the Magnitogorsk coke, which has the highest resistivity of the metallurgical cokes investigated, is twice the resistivity of the Corus coke, which has the lowest electrical resistivity. Zdzieszowice and SSAB coke sort in between with decreasing resistivities in the respective order. The electrical resistivity of anthracite, charcoal, and petroleum coke is generally higher than the resistivity of the metallurgical cokes, ranging from about two to about eight times the resistivity of the Corus coke at 1450{sup o}C. The general trend is that the bulk resistivity of carbon materials decreases with increasing temperature and increasing particle size.

  14. Heteroatom incorporated coke for electrochemical cell electrode

    DOE Patents [OSTI]

    Lewis, Irwin Charles (Strongsville, OH); Greinke, Ronald Alfred (Medina, OH)

    1997-01-01

    This invention relates to an electrode for a coke/alkali metal electrochemical cell comprising: (a) calcined coke particles: (i) that contain at least 0.5 weight percent of nitrogen heteroatoms and at least 1.0 weight percent sulfur heteroatoms, and (ii) that have an average particle size from 2 microns to 40 microns with essentially no particles being greater than 50 microns. (b) a binder This invention also relates to a coke/alkali metal electrochemical cell comprising: (a) an electrode as described above, (b) a non-aqueous electrolytic solution comprising an organic aprotic solvent and an electrically conductive salt, and (c) a counterelectrode.

  15. Heteroatom incorporated coke for electrochemical cell electrode

    DOE Patents [OSTI]

    Lewis, I.C.; Greinke, R.A.

    1997-06-17

    This invention relates to an electrode for a coke/alkali metal electrochemical cell comprising: (a) calcined coke particles: (1) that contain at least 0.5 weight percent of nitrogen heteroatoms and at least 1.0 weight percent sulfur heteroatoms, and (2) that have an average particle size from 2 microns to 40 microns with essentially no particles being greater than 50 microns and (b) a binder. This invention also relates to a coke/alkali metal electrochemical cell comprising: (a) an electrode as described above, (b) a non-aqueous electrolytic solution comprising an organic aprotic solvent and an electrically conductive salt, and (c) a counterelectrode. 5 figs.

  16. Fundamentals of Delayed Coking Joint Industry Project

    SciTech Connect (OSTI)

    Michael Volk; Keith Wisecarver

    2003-09-26

    Delayed coking evolved steadily over the early to mid 1900s to enable refiners to convert high boiling, residual petroleum fractions to light products such as gasoline. Pound for pound, coking is the most energy intensive of any operation in a modern refinery. Large amounts of energy are required to heat the thick, poor-quality petroleum residuum to the 900 to 950 degrees F required to crack the heavy hydrocarbon molecules into lighter, more valuable products. One common misconception of delayed coking is that the product coke is a disadvantage. Although coke is a low valued (near zero economic value) byproduct, compared to transportation fuels, there is a significant worldwide trade and demand for coke as it is an economical fuel. Coke production has increased steadily over the last ten years, with further increases forecast for the foreseeable future. Current domestic production is near 111,000 tons per day. A major driving force behind this increase is the steady decline in crude quality available to refiners. Crude slates are expected to grow heavier with higher sulfur contents while environmental restrictions are expected to significantly reduce the demand for high-sulfur residual fuel oil. Light sweet crudes will continue to be available and in even greater demand than they are today. Refiners will be faced with the choice of purchasing light sweet crudes at a premium price, or adding bottom of the barrel upgrading capability, through additional new investments, to reduce the production of high-sulfur residual fuel oil and increase the production of low-sulfur distillate fuels. A second disadvantage is that liquid products from cokers frequently are unstable, i.e., they rapidly form gum and sediments. Because of intermediate investment and operating costs, delayed coking has increased in popularity among refiners worldwide. Based on the 2000 Worldwide Refining Survey published in the Oil and Gas, the delayed coking capacity for 101 refineries around the world

  17. Mozambique becomes a major coking coal exporter?

    SciTech Connect (OSTI)

    Ruffini, A.

    2008-06-15

    In addition to its potential role as a major international supplier of coking coal, Mozambique will also become a major source of power generation for southern Africa. 3 figs.

  18. Fundamentals of Delayed Coking Joint Industry Project

    SciTech Connect (OSTI)

    Michael Volk; Keith Wisecarver

    2004-09-26

    Delayed coking evolved steadily over the early to mid 1900s to enable refiners to convert high boiling, residual petroleum fractions to light products such as gasoline. Pound for pound, coking is the most energy intensive of any operation in a modern refinery. Large amounts of energy are required to heat the thick, poor-quality petroleum residuum to the 900 to 950 degrees F required to crack the heavy hydrocarbon molecules into lighter, more valuable products. One common misconception of delayed coking is that the product coke is a disadvantage. Although coke is a low valued (near zero economic value) byproduct, compared to transportation fuels, there is a significant worldwide trade and demand for coke as it is an economical fuel. Coke production has increased steadily over the last ten years, with further increases forecast for the foreseeable future. Current domestic production is near 111,000 tons per day. A major driving force behind this increase is the steady decline in crude quality available to refiners. Crude slates are expected to grow heavier with higher sulfur contents while environmental restrictions are expected to significantly reduce the demand for high-sulfur residual fuel oil. Light sweet crudes will continue to be available and in even greater demand than they are today. Refiners will be faced with the choice of purchasing light sweet crudes at a premium price, or adding bottom of the barrel upgrading capability, through additional new investments, to reduce the production of high-sulfur residual fuel oil and increase the production of low-sulfur distillate fuels. A second disadvantage is that liquid products from cokers frequently are unstable, i.e., they rapidly form gum and sediments. Because of intermediate investment and operating costs, delayed coking has increased in popularity among refiners worldwide. Based on the 2000 Worldwide Refining Survey published in the Oil and Gas, the delayed coking capacity for 101 refineries around the world

  19. The waste water free coke plant

    SciTech Connect (OSTI)

    Schuepphaus, K.; Brink, N.

    1995-12-01

    Apart from coke which is the actual valuable material a coke oven plant also produces a substantial volume of waste water. These effluent water streams are burdened with organic components (e.g. phenols) and inorganic salts (e.g. NH{sub 4}Cl); due to the concentration of the constituents contained therein these effluent waters must be subjected to a specific treatment before they can be introduced into public waters. For some years a lot of separation tasks have been solved successfully by applying the membrane technology. It was especially the growing number of membrane facilities for cleaning of landfill leakage water whose composition can in fact be compared with that of coking plant waste waters (organic constituents, high salt fright, ammonium compounds) which gave Thyssen Still Otto Anlagentechnik the idea for developing a process for coke plant effluent treatment which contains the membrane technology as an essential component.

  20. Oil coking propensity under hydroprocessing conditions

    SciTech Connect (OSTI)

    Kriz, J.F. )

    1991-01-01

    If the processability of heavy or residual oil is assessed in terms of conversion to distillate oils, the tendency to form carbonaceous (coke) deposits in the reactor would impose limits on the operating conditions, since any significant coke accumulation on a continuing basis would be prohibitive. Experimentally, one can evaluate the feedstock coking propensity in a bench-scale reactor for a set of typical hydroprocessing conditions by varying the temperature near the threshold of coking. For a number of different feedstocks examined by this method, an empirical function can be found correlating the coking propensity with some of the characteristic properties determined by routine analyses. The present approach used a combination of physical and chemical properties including density and contents of Conradson Carbon residue, pentane and toluene insolubles, fraction of high-boiling pitch, and carbon, hydrogen, nitrogen, sulfur and ash. Feedstocks were chosen to cover a wide but practical range of properties to establish their impact on the coking propensity. Although these relationships apply to thermal hydroprocessing, the role of catalysts is also indicated.

  1. Unmanned operation of the coke guides at Hoogovens IJmuiden Coke Plant 1

    SciTech Connect (OSTI)

    Vos, D.; Mannes, N.; Poppema, B.

    1995-12-01

    Due to the bad condition of batteries and many ovens under repair, Hoogovens was forced to partially repair and rebuild the Coke plant No. 1. The production of coke at Coke plant No. 1 is realized in 3 production blocks subdivided in 6 batteries. Besides a renovated installation, all coke oven machines were renewed. A total of five identical machine sets are available. Each consists of a pusher machine, larry car, coke guide and quench car with diesel locomotive. A complete automated control system was implemented. The main objectives were a highly regular coking and pushing process, automated traveling and positioning and a centrally coordinated interlocking of machine functions. On each operational machine however an operator performed the supervisory control of the automated machine functions. After years of good experience with the automated system, economical reasons urged further personnel reduction from 1994 on. Totally 375 people were involved, including the maintenance department. To reduce the occupation at coke plant No. 1, the coke guide was the first machine to be fully automated because of the isolated and uncomfortable working place.

  2. Grinding tool for making hemispherical bores in hard materials

    DOE Patents [OSTI]

    Duran, E.L.

    1985-04-03

    A grinding tool for forming hemispherical bores in hard materials such as boron carbide. The tool comprises a hemicircular grinding bit, formed of a metal bond diamond matrix, which is mounted transversely on one end of a tubular tool shaft. The bit includes a spherically curved outer edge surface which is the active grinding surface of the tool. Two coolant fluid ports on opposite sides of the bit enable introduction of coolant fluid through the bore of the tool shaft so as to be emitted adjacent the opposite sides of the grinding bit, thereby providing optimum cooling of both the workpiece and the bit.

  3. Innovative coke oven gas cleaning system for retrofit applications. Volume 1, Public design report

    SciTech Connect (OSTI)

    Not Available

    1994-05-24

    This Public Design Report provides, in a single document, available nonproprietary design -information for the ``Innovative Coke Oven Gas Cleaning System for Retrofit Applications`` Demonstration Project at Bethlehem Steel Corporation`s Sparrows Point, Maryland coke oven by-product facilities. This project demonstrates, for the first time in the United States, the feasibility of integrating four commercially available technologies (processes) for cleaning coke oven gas. The four technologies are: Secondary Gas Cooling, Hydrogen Sulfide and Ammonia Removal, Hydrogen Sulfide and Ammonia Recovery, and Ammonia Destruction and Sulfur Recovery. In addition to the design aspects, the history of the project and the role of the US Department of,Energy are briefly discussed. Actual plant capital and projected operating costs are also presented. An overview of the integration (retrofit) of the processes into the existing plant is presented and is followed by detailed non-proprietary descriptions of the four technologies and their overall effect on reducing the emissions of ammonia, sulfur, and other pollutants from coke oven gas. Narrative process descriptions, simplified process flow diagrams, input/output stream data, operating conditions, catalyst and chemical requirements, and utility requirements are given for each unit. Plant startup provisions, environmental considerations and control monitoring, and safety considerations are also addressed for each process.

  4. Analysis of surface integrity of grinded gears using Barkhausen noise analysis and x-ray diffraction

    SciTech Connect (OSTI)

    Vrkoslavov, Lucie; Louda, Petr; Malec, Ji?i

    2014-02-18

    The contribution is focused to present results of study grinded gears made of 18CrNiMo7-6 steel used in the wind power plant for support (service) purposes. These gears were case-hardened due to standard hard case and soft core formation. This heat treatment increases wear resistance and fatigue strength of machine parts. During serial production some troubles with surface integrity have occurred. When solving complex problems lots of samples were prepared. For grinding of gears were used different parameters of cutting speed, number of material removal and lots from different subsuppliers. Material characterization was carried out using Barkhausen noise analysis (BNA) device; X-ray diffraction (XRD) measurement of surface residual stresses was done as well. Depth profile of measured characteristics, e.g. magnetoelastic parameter and residual stress was obtained by step by step layers' removing using electrolytic etching. BNA software Viewscan was used to measure magnetizing frequency sweep (MFS) and magnetizing voltage sweep (MVS). Scanning of Magnetoelastic parameter (MP) endwise individual teeth were also carried out with Viewscan. These measurements were done to find problematic surface areas after grinding such as thermal damaged locations. Plots of the hardness and thickness of case-hardened layer on cross sections were measurered as well. Evaluation of structure of subsurface case-hardened layer and core was made on etched metallographic patterns. The aim of performed measurements was to find correlation between conditions of grinding, residual stresses and structural and magnetoelastic parameters. Based on correlation of measured values and technological parameters optimizing the production of gears will be done.

  5. Coke oven doors: Historical methods of emission control and evaluation of current designs

    SciTech Connect (OSTI)

    Pettrey, J.O.; Greene, D.E. )

    1993-01-01

    The containment of oven door leakage has presented challenges to coke producers for many years as the requirements of environmental regulatory agencies have become increasingly stringent. A description and evaluation of past door modifications, leakage control methodologies and luting practices on Armco Steel Company, L.P.'s Ashland No. 4 Battery is detailed to provide a background for recent work, and to expand the industry's technology base. The strict door leakage standards of the 1990 amendments to the USA Clean Air Act has prompted additional technical studies. Both a joint Armco committee's evaluation of successful systems world wide and test door installations at Ashland were incorporated to determine compliance strategy. The eventual installation of Ikio Model II coke oven doors, along with modifications to ancillary equipment, has resulted in door leakage rates approaching zero. Associated methods, problems, results and evaluations are discussed.

  6. Rheology of petroleum coke-water slurry

    SciTech Connect (OSTI)

    Prasad, M.; Mall, B.K.; Mukherjee, A.

    1998-04-01

    This paper reports the results of the studies carried out on the optimization of particle size distribution, the theological characteristics and stability of highly loaded petroleum coke-water slurry using three additives. The solids loading achieved in the slurries were in the range of 65% to 75.6% depending on the additives used. Slurry viscosity varied between 267 to 424 mPas at 128 s{sup -1} shear rate. The petroleum coke-water slurries exhibited pseudoplastic characteristics with yield tending towards Bingham plastic as the solids loading progressively increased.

  7. Metal and coke deactivation of resid hydroprocessing catalysts

    SciTech Connect (OSTI)

    Bartholdy, J.; Cooper, B.

    1993-12-31

    It is well established that residuum hydroprocessing catalysts are deactivated by both coke and metals. The traditional approach has been to relate the initial rapid deactivation with coke laydown and subsequent deactivation with deposition of metals from the residuum. This paper presents evidence of coke and metals deactivation throughout the life of the catalyst. By comparing tests made at constant temperature with tests made at constant conversion it is concluded that the extent of coke deactivation in related to the operating temperature. The extent of coke deactivation has further been estimated by regeneration of a fraction of the catalyst bed.

  8. Reducing dust emissions at OAO Alchevskkoks coke battery 10A

    SciTech Connect (OSTI)

    T.F. Trembach; E.N. Lanina

    2009-07-15

    Coke battery 10A with rammed batch is under construction at OAO Alchevskkoks. The design documentation developed by Giprokoks includes measures for reducing dust emissions to the atmosphere. Aspiration systems with dry dust trapping are employed in the new components of coke battery 10A and in the existing coke-sorting equipment. Two-stage purification of dusty air in cyclones and bag filters is employed for the coke-sorting equipment. This system considerably reduces coke-dust emissions to the atmosphere.

  9. Petroleum coke: A viable fuel for power generation

    SciTech Connect (OSTI)

    Dymond, R.E.

    1995-09-01

    As the power generation industry struggles to meet the seemingly divergent goals of reduced emissions and increased electricity demand during the 1990s, petroleum coke`s use as a low cost BTU source should be seriously considered. Since this material is produced at petroleum refineries-thus affected by variables unfamiliar to most power generators-industry participants often do not understand what forces drive coke markets. This article will address these forces and provide some insight about petroleum coke`s future as a viable fuel for power generation.

  10. Petroleum coke: A viable fuel for power generation

    SciTech Connect (OSTI)

    Dymond, R.E.

    1994-12-31

    As the power generation industry struggles to meet the seemingly divergent goals of reduced emissions and increased electricity demand during the 1990s, petroleum coke`s use as a low cost BTU source should be seriously considered. since this material is produced at petroleum refineries - thus affected by variables unfamiliar to most power generators - industry participants often do not understand what forces drive coke markets. This article will address these forces and provide some insight about petroleum coke`s future as a viable fuel for power generation.

  11. Residuum conversion using hydroprocessing with delayed coking

    SciTech Connect (OSTI)

    Wilson, J.R.

    1985-01-01

    Chevron's Pascagoula Resid Conversion Project utilizes a combination of hydroprocessing and delayed coking. In conjunction with existing process units, this conversion capacity gives the Pascagoula Refinery flexibility to meet the light product demands while processing heavier and lower valued crude oils. Design concepts and considerations into the final process selection are discussed.

  12. Fundamentals of Delayed Coking Joint Industry Project

    SciTech Connect (OSTI)

    Michael Volk Jr; Keith Wisecarver

    2005-10-01

    Delayed coking evolved steadily over the early to mid 1900s to enable refiners to convert high boiling, residual petroleum fractions to light products such as gasoline. Pound for pound, coking is the most energy intensive of any operation in a modern refinery. Large amounts of energy are required to heat the thick, poor-quality petroleum residuum to the 900 to 950 degrees F required to crack the heavy hydrocarbon molecules into lighter, more valuable products. One common misconception of delayed coking is that the product coke is a disadvantage. Although coke is a low valued (near zero economic value) byproduct, compared to transportation fuels, there is a significant worldwide trade and demand for coke as it is an economical fuel. Coke production has increased steadily over the last ten years, with further increases forecast for the foreseeable future. Current domestic production is near 111,000 tons per day. A major driving force behind this increase is the steady decline in crude quality available to refiners. Crude slates are expected to grow heavier with higher sulfur contents while environmental restrictions are expected to significantly reduce the demand for high-sulfur residual fuel oil. Light sweet crudes will continue to be available and in even greater demand than they are today. Refiners will be faced with the choice of purchasing light sweet crudes at a premium price, or adding bottom of the barrel upgrading capability, through additional new investments, to reduce the production of high-sulfur residual fuel oil and increase the production of low-sulfur distillate fuels. A second disadvantage is that liquid products from cokers frequently are unstable, i.e., they rapidly form gum and sediments. Because of intermediate investment and operating costs, delayed coking has increased in popularity among refiners worldwide. Based on the 2000 Worldwide Refining Survey published in the Oil and Gas, the delayed coking capacity for 101 refineries around the world

  13. RESIDUA UPGRADING EFFICIENCY IMPROVEMENT MODELS: COKE FORMATION PREDICTABILITY MAPS

    SciTech Connect (OSTI)

    John F. Schabron; A. Troy Pauli; Joseph F. Rovani Jr.

    2002-05-01

    The dispersed particle solution model of petroleum residua structure was used to develop predictors for pyrolytic coke formation. Coking Indexes were developed in prior years that measure how near a pyrolysis system is to coke formation during the coke formation induction period. These have been demonstrated to be universally applicable for residua regardless of the source of the material. Coking onset is coincidental with the destruction of the ordered structure and the formation of a multiphase system. The amount of coke initially formed appears to be a function of the free solvent volume of the original residua. In the current work, three-dimensional coke make predictability maps were developed at 400 C, 450 C, and 500 C (752 F, 842 F, and 932 F). These relate residence time and free solvent volume to the amount of coke formed at a particular pyrolysis temperature. Activation energies for two apparent types of zero-order coke formation reactions were estimated. The results provide a new tool for ranking residua, gauging proximity to coke formation, and predicting initial coke make tendencies.

  14. REDUCING POWER PRODUCTION COSTS BY UTILIZING PETROLEUM COKE

    SciTech Connect (OSTI)

    Kevin C. Galbreath; Donald L. Toman; Christopher J. Zygarlicke

    1999-09-01

    Petroleum coke, a byproduct of the petroleum-refining process, is an attractive primary or supplemental fuel for power production primarily because of a progressive and predictable increase in the production volumes of petroleum coke (1, 2). Petroleum coke is most commonly blended with coal in proportions suitable to meet sulfur emission compliance. Petroleum coke is generally less reactive than coal; therefore, the cofiring of petroleum coke with coal typically improves ignition, flame stability, and carbon loss relative to the combustion of petroleum coke alone. Although petroleum coke is a desirable fuel for producing relatively inexpensive electrical power, concerns about the effects of petroleum coke blending on combustion and pollution control processes exist in the coal-fired utility industry (3). The Energy & Environmental Research Center (EERC) completed a 2-year technical assessment of petroleum coke as a supplemental fuel. A survey questionnaire was sent to seven electric utility companies that are currently cofiring coal and petroleum coke in an effort to solicit specific suggestions on research needs and fuel selections. An example of the letter and survey questionnaire is presented in Appendix A. Interest was expressed by most utilities in evaluating the effects of petroleum coke blending on grindability, combustion reactivity, fouling, slagging, and fly ash emissions control. Unexpectedly, concern over corrosion was not expressed by the utilities contacted. Although all seven utilities responded to the question, only two utilities, Northern States Power Company (NSP) and Ameren, sent fuels to the EERC for evaluation. Both utilities sent subbituminous coals from the Power River Basin and petroleum shot coke samples. Petroleum shot coke is produced unintentionally during operational upsets in the petroleum refining process. This report evaluates the effects of petroleum shot coke blending on grindability, fuel reactivity, fouling/slagging, and

  15. Innovative grinding wheel design for cost-effective machining of advanced ceramics

    SciTech Connect (OSTI)

    Licht, R.H.; Kuo, P.; Liu, S.; Murphy, D.; Picone, J.W.; Ramanath, S.

    2000-05-01

    This Final Report covers the Phase II Innovative Grinding Wheel (IGW) program in which Norton Company successfully developed a novel grinding wheel for cost-effective cylindrical grinding of advanced ceramics. In 1995, Norton Company successfully completed the 16-month Phase I technical effort to define requirements, design, develop, and evaluate a next-generation grinding wheel for cost-effective cylindrical grinding of advanced ceramics using small prototype wheels. The Phase II program was initiated to scale-up the new superabrasive wheel specification to larger diameters, 305-mm to 406-mm, required for most production grinding of cylindrical ceramic parts, and to perform in-house and independent validation grinding tests.

  16. REDUCING POWER PRODUCTION COSTS BY UTILIZING PETROLEUM COKE

    SciTech Connect (OSTI)

    1998-09-01

    A Powder River Basin subbituminous coal from the North Antelope mine and a petroleum shot coke were received from Northern States Power Company (NSP) for testing the effects of parent fuel properties on coal-coke blend grindability and evaluating the utility of petroleum coke blending as a strategy for improving electrostatic precipitator (ESP) particulate collection efficiency. Petroleum cokes are generally harder than coals, as indicated by Hardgrove grindability tests. Therefore, the weaker coal component may concentrate in the finer size fractions during the pulverizing of coal-coke blends. The possibility of a coal-coke size fractionation effect is being investigated because it may adversely affect combustion performance. Although the blending of petroleum coke with coal may adversely affect combustion performance, it may enhance ESP particulate collection efficiency. Petroleum cokes contain much higher concentrations of V relative to coals. Consequently, coke blending can significantly increase the V content of fly ash resulting from coal-coke combustion. Pentavalent vanadium oxide (V{sub 2}O{sub 5}) is a known catalyst for transforming gaseous sulfur dioxide (SO{sub 2}[g]) to gaseous sulfur trioxide (SO{sub 3}[g]). The presence of SO{sub 3}(g) strongly affects fly ash resistivity and, thus, ESP performance.

  17. Cyanide treatment options in coke plants

    SciTech Connect (OSTI)

    Minak, H.P.; Lepke, P.

    1997-12-31

    The paper discusses the formation of cyanides in coke oven gas and describes and compares waste processing options. These include desulfurization by aqueous ammonia solution, desulfurization using potash solution, desulfurization in oxide boxes, decomposition of NH{sub 3} and HCN for gas scrubbing. Waste water treatment methods include chemical oxidation, precipitation, ion exchange, reverse osmosis, and biological treatment. It is concluded that biological treatment is the most economical process, safe in operation and requires a minimum of manpower.

  18. Improvement of coke quality by utilization of hydrogenation residue

    SciTech Connect (OSTI)

    Meckel, J.F. ); Wairegi, T. )

    1993-01-01

    Hydrogenation residue is the product left over when petroleum residue feedstocks (or coal) are treated by, e.g. the Veba Combi Cracking (VCC) process. Many tests in semitechnical and full-sized coke ovens were carried out with hydrogenation residue (HR) as an additive in coking coal blends for the production of blast furnace coke or foundry coke. The results of the investigations reported in this paper demonstrate that HR is a very promising alternative for enlarging the coking coal basis compared to other processes or the use of other additives. The application of HR on an industrial scale did not indicate any negative impact on the handling of the hydrogenation residue or on the operation of the coke oven battery.

  19. Petroleum-derived additive reduces coke on hydrotreating catalyst

    SciTech Connect (OSTI)

    Not Available

    1993-12-27

    Upgrading heavy oils is becoming increasingly important as the world crude slate gets heavier and demand for light products increases. But most upgrading processes must contend with problems related to coke formation during hydrotreating. Three researchers have found that materials having high radical-scavenging ability can reduce coke formation when applied to hydrotreating heavy oils. And these materials can be produced from heavy petroleum fractions. The paper discusses coke formation, the research program, and the pilot plant.

  20. Development of an Advanced Combined Heat and Power (CHP) System Utilizing Off-Gas from Coke Calcination

    Broader source: Energy.gov [DOE]

    Coke calcination is a process that involves the heating of green petroleum coke in order to remove volatile material and purify the coke for further processing. Calcined coke is vital to the...

  1. Reducing power production costs by utilizing petroleum coke. Annual report

    SciTech Connect (OSTI)

    Galbreath, K.C.

    1998-07-01

    A Powder River Basin subbituminous coal from the North Antelope mine and a petroleum shot coke were received from Northern States Power Company (NSP) for testing the effects of parent fuel properties on coal-coke blend grindability and evaluating the utility of petroleum coke blending as a strategy for improving electrostatic precipitator (ESP) particulate collection efficiency. Petroleum cokes are generally harder than coals, as indicated by Hardgrove grindability tests. Therefore, the weaker coal component may concentrate in the finer size fractions during the pulverizing of coal-coke blends. The possibility of a coal-coke size fractionation effect is being investigated because it may adversely affect combustion performance, it may enhance ESP particulate collection efficiency. Petroleum cokes contain much higher concentrations of V relative to coals. Consequently, coke blending can significantly increase the V content of fly ash resulting from coal-coke combustion. Pentavalent vanadium oxide (V{sub 2}O{sub 5}) is a known catalyst for transforming gaseous sulfur dioxide (SO{sub 2}[g]) to gaseous sulfur trioxide (SO{sub 3}[g]). The presence of SO{sub 3}(g) strongly affects fly ash resistivity and, thus, ESP performance.

  2. Petroleum coke supply: present problems and future prospects

    SciTech Connect (OSTI)

    Brandt, H.H.

    1982-08-01

    Since the 1973 OPEC oil embargo, the coke market's strength has gradually shifted, for the most part, from the buyer to the seller. This general assessment is subject to localized exceptions and temporary reversals (such as the present market weakness due to the low level of primary aluminum production). However, there are two major factors which will influence the trend toward higher coke prices for anode use by aluminum producers: decreasing supplies of high-quality coke, and revised marketing strategies of coke producers.

  3. Lime addition to heavy crude oils prior to coking

    SciTech Connect (OSTI)

    Kessick, M. A.; George, Z. M.; Schneider, L. G.

    1985-06-04

    The sulphur emissive capability, on combustion, of coke which is formed during upgrading of sulphur-containing heavy crude oils, including oil sands bitumen, or residua is decreased by the addition of slaked lime or calcium oxide to the heavy crude oil prior to coking. The presence of the slaked lime or calcium oxide leads to an increased yield of liquid distillates at coking temperatures of about 450/sup 0/ to about 500/sup 0/ C. Ash remaining after combustion of the coke may be leached to recover nickel and vanadium values therefrom.

  4. Petroleum coke as a clean and reliable boiler fuel

    SciTech Connect (OSTI)

    Molen, R.V.

    1994-12-31

    Petroleum coke is the solid residue left over after all valuable liquid and gaseous components have been extracted from crude oil. A typical integrated refinery flowsheet when a coker is used is illustrated. Coking is a process which {open_quotes}removes{close_quotes} excess carbon from the crude in order to obtain a better carbon-to-hydrogen ratio as required by refineries to produce the balance of products presently demanded by the marketplace. Three basic types of cokers exists. The current production from these is shown. Most delayed cokers use a batch operation in which the coke forms a layer on the walls and is usually removed by hydroblasting after processing of the batch. This coke is therefore sized irregularly and must be crushed prior to use. Another form of delayed coking, also a batch process, results in {open_quotes}shot{close_quotes} coke which looks like multi-sized BB`s. Delayed cokes are by far the largest produced cokes. A distant second in production is fluid coke which is produced in a continuous process fluidized bed. The rarely produced flexicoke comes from an entrained bed reactor.

  5. Nippon Coke and Engineering Sumitomo Corp JV | Open Energy Information

    Open Energy Info (EERE)

    navigation, search Name: Nippon Coke and Engineering & Sumitomo Corp JV Place: Tokyo, Japan Zip: 135-6007 Product: Japan-based natural graphite base anode materials joint...

  6. Application of process safety management to the coke industry

    SciTech Connect (OSTI)

    Mentzer, W.P. (USX Corp., Clairton, PA (United States))

    1994-09-01

    OSHA's Process Safety Management (PSM) standard went into effect on May 26, 1992. Explosions at various industrial facilities that claimed the lives of workers over the past several years were the catalyst for the new federal regulations. The new PSM standard deals with 130 specific chemicals along with flammable liquids and gases used at nearly 25,000 worksites. The performance-based PSM standard consists of 14 elements that establish goals and describe basic program elements to fulfill these goals. The PSM standard requires employers to conduct a process hazard analysis to examine potential problems and determine what preventative measures should be taken. Key elements include employee training, written operating procedures, safety reviews and maintenance requirements to insure the mechanical integrity of critical components. The presentation will cover the evolution of OSHA's PSM standard, the requirements of the 14 elements in the PSM standard and discuss the significant achievements in the development and implementation of the PSM process at US Steel's Clairton coke plant.

  7. Low-Rank Coal Grinding Performance Versus Power Plant Performance

    SciTech Connect (OSTI)

    Rajive Ganguli; Sukumar Bandopadhyay

    2008-12-31

    The intent of this project was to demonstrate that Alaskan low-rank coal, which is high in volatile content, need not be ground as fine as bituminous coal (typically low in volatile content) for optimum combustion in power plants. The grind or particle size distribution (PSD), which is quantified by percentage of pulverized coal passing 74 microns (200 mesh), affects the pulverizer throughput in power plants. The finer the grind, the lower the throughput. For a power plant to maintain combustion levels, throughput needs to be high. The problem of particle size is compounded for Alaskan coal since it has a low Hardgrove grindability index (HGI); that is, it is difficult to grind. If the thesis of this project is demonstrated, then Alaskan coal need not be ground to the industry standard, thereby alleviating somewhat the low HGI issue (and, hopefully, furthering the salability of Alaskan coal). This project studied the relationship between PSD and power plant efficiency, emissions, and mill power consumption for low-rank high-volatile-content Alaskan coal. The emissions studied were CO, CO{sub 2}, NO{sub x}, SO{sub 2}, and Hg (only two tests). The tested PSD range was 42 to 81 percent passing 76 microns. Within the tested range, there was very little correlation between PSD and power plant efficiency, CO, NO{sub x}, and SO{sub 2}. Hg emissions were very low and, therefore, did not allow comparison between grind sizes. Mill power consumption was lower for coarser grinds.

  8. The industrial ecology of steel

    SciTech Connect (OSTI)

    Considine, Timothy J.; Jablonowski, Christopher; Considine, Donita M.M.; Rao, Prasad G.

    2001-03-26

    This study performs an integrated assessment of new technology adoption in the steel industry. New coke, iron, and steel production technologies are discussed, and their economic and environmental characteristics are compared. Based upon detailed plant level data on cost and physical input-output relations by process, this study develops a simple mathematical optimization model of steel process choice. This model is then expanded to a life cycle context, accounting for environmental emissions generated during the production and transportation of energy and material inputs into steelmaking. This life-cycle optimization model provides a basis for evaluating the environmental impacts of existing and new iron and steel technologies. Five different plant configurations are examined, from conventional integrated steel production to completely scrap-based operations. Two cost criteria are used to evaluate technology choice: private and social cost, with the latter including the environmental damages associated with emissions. While scrap-based technologies clearly generate lower emissions in mass terms, their emissions of sulfur dioxide and nitrogen oxides are significantly higher. Using conventional damage cost estimates reported in the literature suggests that the social costs associated with scrap-based steel production are slightly higher than with integrated steel production. This suggests that adopting a life-cycle viewpoint can substantially affect environmental assessment of new technologies. Finally, this study also examines the impacts of carbon taxes on steel production costs and technology choice.

  9. Characterization of grinding wheels: An annotated Bibliography. Final report

    SciTech Connect (OSTI)

    McClung, R.W.

    1995-12-01

    The characteristics of grinding wheels, after both fabrication and periods of operation, have a significant effect on the processed surface and the mechanical properties of advanced ceramics. An extensive literature survey and review has been conducted to determine and catalogue the various characterization methods that have been investigated and reported. Although many of the references have addressed the grinding of metals, the historical and technical merit justify their inclusion in this bibliography. For convenience, the references have been subdivided into nine subheadings: Nondestructive examination; elasticity and stiffness; wheel hardness; topography and profilometry; observation of texture of wheel surfaces wheel wear; in process monitoring of grinding, acoustic emission, other; characteristics of ground surfaces; and miscellaneous.

  10. VACASULF operation at Citizens Gas and Coke Utility

    SciTech Connect (OSTI)

    Currey, J.H.

    1995-12-01

    Citizens Gas and Coke Utility is a Public Charitable Trust which operates as the Department of Utilities of the City of Indianapolis, Indiana. Indianapolis Coke, the trade name for the Manufacturing Division of the Utility, operates a by-products coke plant in Indianapolis, Indiana. The facility produces both foundry and blast furnace coke. Surplus Coke Oven gas, generated by the process, is mixed with Natural Gas for sale to industrial and residential customers. In anticipation of regulatory developments, beginning in 1990, Indianapolis Coke undertook the task to develop an alternate Coke Oven Gas desulfurization technology for its facility. The new system was intended to perform primary desulfurization of the gas, dramatically extending the oxide bed life, thus reducing disposal liabilities. Citizens Gas chose the VACASULF technology for its primary desulfurization system. VACASULF requires a single purchased material, Potassium Hydroxide (KOH). The KOH reacts with Carbon Dioxide in the coke Oven Gas to form Potassium Carbonate (potash) which in turn absorbs the Hydrogen Sulfide. The rich solution releases the absorbed sulfide under strong vacuum in the desorber column. Operating costs are reduced through utilization of an inherent heat source which is transferred indirectly via attendant reboilers. The Hydrogen Sulfide is transported by the vacuum pumps to the Claus Kiln and Reactor for combustion, reaction, and elemental Sulfur recovery. Regenerated potash solution is returned to the Scrubber.

  11. High-speed, low-damage grinding of advanced ceramics Phase 1. Final report

    SciTech Connect (OSTI)

    Kovach, J.A.; Malkin, S.

    1995-03-01

    In manufacture of structural ceramic components, grinding costs can comprise up to 80% of the entire manufacturing cost. Most of these costs arise from the conventional multi-step grinding process with numerous grinding wheels and additional capital equipment, perishable dressing tools, and labor. In an attempt to reduce structural ceramic grinding costs, a feasibility investigation was undertaken to develop a single step, roughing-finishing process suitable for producing high-quality silicon nitride ceramic parts at high material removal rates at lower cost than traditional, multi-stage grinding. This feasibility study employed combined use of laboratory grinding tests, mathematical grinding models, and characterization of resultant material surface condition. More specifically, this Phase 1 final report provides a technical overview of High-Speed, Low-Damage (HSLD) ceramic grinding and the conditions necessary to achieve the small grain depths of cut necessary for low damage grinding while operating at relatively high material removal rates. Particular issues addressed include determining effects of wheel speed and material removal rate on resulting mode of material removal (ductile or brittle fracture), limiting grinding forces, calculation of approximate grinding zone temperatures developed during HSLD grinding, and developing the experimental systems necessary for determining HSLD grinding energy partition relationships. In addition, practical considerations for production utilization of the HSLD process are also discussed.

  12. Recovery of titanium values from titanium grinding swarf by electric furnace smelting

    DOE Patents [OSTI]

    Gerdemann, Stephen J.; White, Jack C.

    1998-01-01

    A method for the recovery of valuable materials from titanium grinding swarf is provided comprising the steps of sieving the accumulated titanium grinding swarf to remove unwanted coarse trash and grinding wheel fragments, pelletizing, and smelting in an electric arc furnace to produce ferrotitanium and/or high titanium slag.

  13. Recovery of titanium values from titanium grinding swarf by electric furnace smelting

    DOE Patents [OSTI]

    Gerdemann, S.J.; White, J.C.

    1998-08-04

    A method for the recovery of valuable materials from titanium grinding swarf is provided comprising the steps of sieving the accumulated titanium grinding swarf to remove unwanted coarse trash and grinding wheel fragments, pelletizing, and smelting in an electric arc furnace to produce ferrotitanium and/or high titanium slag. 1 fig.

  14. Recovery of titanium values from titanium grinding swarf by electric furnace smelting

    DOE Patents [OSTI]

    Gerdemann, Stephen J.; White, Jack C.

    1999-01-01

    A method for the recovery of valuable materials from titanium grinding swarf is provided comprising the steps of sieving the accumulated titanium grinding swarf to remove unwanted coarse trash and grinding wheel fragments, pelletizing, and smelting in an electric arc furnace to produce ferrotitanium and/or high titanium slag.

  15. Recovery of titanium values from titanium grinding swarf by electric furnace smelting

    SciTech Connect (OSTI)

    Gerdemann, S.J.; White, J.C.

    1999-10-19

    A method for the recovery of valuable materials from titanium grinding swarf is provided comprising the steps of sieving the accumulated titanium grinding swarf to remove unwanted coarse trash and grinding wheel fragments, pelletizing, and smelting in an electric arc furnace to produce ferrotitanium and/or high titanium slag.

  16. System to acquire and monitor operating machinery positions for horizontal coke oven batteries

    SciTech Connect (OSTI)

    Bierbaum, D.; Teschner, W.

    1980-02-26

    In a horizontal coke oven battery with at least one coke receiving device movable along one longitudinal side of the battery and at least one coke driving device movable along an opposite longitudinal side of the battery, an apparatus is disclosed for determining the relative position of the coke receiving device with respect to the coke driving device and for activating the coke driving device when its position corresponds with that of the coke receiving device. A first wheel is mounted on the coke receiving device for rotation with the movement of the coke receiving device, a first angle encoder is connected to the first wheel for producing a first signal corresponding to the location of the first wheel and the position of the coke receiving device along the coke oven, and an input storage in the form of a magnetic disc is connected to the first angle encoder for recording and storing the signal. A second wheel is mounted on the coke driving device for rotation with the movement of the coke driving device and a second angle encoder is connected thereto for producing a second signal which corresponds to the rotation of the second wheel and the position of the coke driving device along the coke oven. A comparator is connected to the second signal encoder for receiving the second signal and a data link is provided between the comparator and the input storage of the coke receiving device so that the first signal from the coke receiving device can be impressed on the comparator. An activator is connected to the comparator for activating the coke driving device when the first signal corresponds to the second signal indicating a corresponding positional relationship between the coke receiving device and the coke driving device.

  17. Table 21. U.S. Coke Imports

    U.S. Energy Information Administration (EIA) Indexed Site

    1. U.S. Coke Imports (short tons) Year to Date Continent and Country of Origin January - March 2016 October - December 2015 January - March 2015 2016 2015 Percent Change North America Total 2,763 52,115 2,035 2,763 2,035 35.8 Canada 2,763 52,115 2,035 2,763 2,035 35.8 Europe Total 1,056 1,156 14 1,056 14 NM Austria - 3 - - - - France - 23 - - - - Germany, Federal Republic of - - 11 - 11 - Italy 1,043 976 - 1,043 - - Spain - 141 - - - - United Kingdom 13 13 3 13 3 333.3 Asia Total 457 326 954 457

  18. RESIDUA UPGRADING EFFICIENCY IMPROVEMENT MODELS: WRI COKING INDEXES

    SciTech Connect (OSTI)

    John F. Schabron; Joseph F. Rovani, Jr.; Francis P. Miknis; Thomas F. Turner

    2003-06-01

    Pyrolysis experiments were conducted with three residua at 400 C (752 F) at various residence times. The wt % coke and gaseous products were measured for the product oils. The Western Research Institute (WRI) Coking Indexes were determined for the product oils. Measurements were made using techniques that might correlate with the Coking Indexes. These included spin-echo proton nuclear magnetic resonance spectroscopy, heat capacity measurements at 280 C (536 F), and ultrasonic attenuation. The two immiscible liquid phases that form once coke formation begins were isolated and characterized for a Boscan residuum pyrolyzed at 400 C (752 F) for 55 minutes. These materials were analyzed for elemental composition (CHNS), porphyrins, and metals (Ni,V) content.

  19. New process to avoid emissions: Constant pressure in coke ovens

    SciTech Connect (OSTI)

    Giertz, J.; Huhn, F.; Hofherr, K.

    1995-12-01

    A chamber pressure regulation (PROven), especially effective in regard to emission control problems of coke ovens is introduced for the first time. Because of the partial vacuum in the collecting main system, it is possible to keep the oven`s raw gas pressure constant on a low level over the full coking time. The individual pressure control for each chamber is assured directly as a function of the oven pressure by an immersion system controlling the flow resistance of the collecting main valve. The latter is a fixed-position design (system name ``FixCup``). By doing away with the interdependence of collecting main pressure and chamber pressure, a parameter seen as a coking constant could not be made variable. This opens a new way to reduce coke oven emissions and simultaneously to prevent the ovens from damage caused by air ingress into the oven.

  20. Methods for retarding coke formation during pyrolytic hydrocarbon processing

    SciTech Connect (OSTI)

    Not Available

    1993-06-22

    A method is described for inhibiting the formation and deposition of pyrolytic coke on the heated metal surfaces in contact with a hydrocarbon feedstock which is undergoing pyrolytic processing to produce lower hydrocarbon fractions and said metal surfaces having a temperature of about 1,400 F or higher, consisting essentially of adding to said hydrocarbon feedstock being pyrolytically processed a coke inhibiting amount of hydroquinone.

  1. Effects of Compressive Force, Particle Size and Moisture Content on Mechanical Properties of Biomass Grinds

    SciTech Connect (OSTI)

    Mani, Sudhagar; Tabil, Lope Jr.; Sokhansanj, Shahabaddine

    2006-03-01

    Chemical composition, moisture content, bulk and particle densities, and geometric mean particle size were determined to characterize grinds from wheat and barley straws, corn stover and switchgrass. The biomass grinds were compressed for five levels of compressive forces (1000, 2000, 3000, 4000, 4400 N) and three levels of particle sizes (3.2, 1.6 and 0.8 mm) at two levels of moisture contents (12% and 15% (wb) to establish the compression and relaxation data. Corn stover grind produced the highest compact density at low pressure during compression. Compressive force, particle size and moisture content of grinds significantly affected the compact density of barley straw, corn stover and switchgrass grinds. However, different particle sizes of wheat straw grind did not produce any significant difference on compact density. Barley straw grind had the highest asymptotic modulus among all other biomass grinds indicating that compact from barley straw grind were more rigid than those of other compacts. Asymptotic modulus increased with an increase in maximum compressive pressure. The trend of increase in asymptotic modulus (EA) with the maximum compressive pressure ( 0) was fitted to a second order polynomial equation. Keywords: Biomass grinds, chemical composition, compact density and asymptotic modulus

  2. Table 7.8 Coke Overview, 1949-2011 (Thousand Short Tons)

    U.S. Energy Information Administration (EIA) Indexed Site

    ... Sources: * 1949-1975Bureau of Mines, Minerals Yearbook, "Coke and Coal Chemicals" chapter. * 1976-1980U.S. Energy Information Administration (EIA), Energy Data Report, Coke and ...

  3. From Flour to Grits, a Water-Powered Mill Keeps on Grinding | Department of

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Energy From Flour to Grits, a Water-Powered Mill Keeps on Grinding From Flour to Grits, a Water-Powered Mill Keeps on Grinding June 30, 2015 - 2:02pm Addthis From Flour to Grits, a Water-Powered Mill Keeps on Grinding Sarah Wagoner Sarah Wagoner Communications Specialist, Wind and Water Power Technologies Office A mill owned and operated for six generations by the Weisenberger family has been grinding grains in the heart of Kentucky since the Civil War. In 1862, August Weisenberger emigrated

  4. Application of cryogenic grinding to achieve homogenization of transuranic wastes

    SciTech Connect (OSTI)

    Atkins, W.H.; Hill, D.D.; Lucero, M.E.; Jaramillo, L.; Martinez, H.E.

    1996-08-01

    This paper describes work done at Los Alamos National Laboratory (LANL) in collaboration with the Department of Energy Rocky Flats Field Office (DOE/RFFO) and with the National Institute of Standards and Technology (NIST), Boulder, Colorado. Researchers on this project have developed a method for cryogenic grinding of mixed wastes to homogenize and, thereby, to acquire a representative sample of the materials. There are approximately 220,000 waste drums owned by the Rocky Flats Environmental Technology Site (RFETS)-50,000 at RFETS and 170,000 at the Idaho National Engineering Laboratory. The cost of sampling the heterogeneous distribution of waste in each drum is prohibitive. In an attempt to produce a homogeneous mixture of waste that would reduce greatly the cost of sampling, researchers at NIST and RFETS are developing a cryogenic grinder. The Los Alamos work herein described addresses the implementation issues of the task. The first issue was to ascertain whether samples of the {open_quotes}small particle{close_quotes} mixtures of materials present in the waste drums at RFETS were representative of actual drum contents. Second, it was necessary to determine at what temperature the grinding operation must be performed in order to minimize or to eliminate the release of volatile organic compounds present in the waste. Last, it was essential to evaluate any effect the liquid cryogen might have on the structural integrity and ventilation capacity of the glovebox system. Results of this study showed that representative samples could be and had been obtained, that some release of organics occurred below freezing because of sublimation, and that operation of the cryogenic grinding equipment inside the glovebox was feasible.

  5. New packing in absorption systems for trapping benzene from coke-oven gas

    SciTech Connect (OSTI)

    V.V. Grabko; V.M. Li; T.A. Shevchenko; M.A. Solov'ev

    2009-07-15

    The efficiency of benzene removal from coke-oven gas in absorption units OAO Alchevskkoks with new packing is assessed.

  6. Study on rheological characteristics of petroleum coke residual oil slurry

    SciTech Connect (OSTI)

    Shou Weiyi; Xu Xiaoming; Cao Xinyu

    1997-07-01

    We have embarked on a program to develop petroleum coke residual oil slurry (POS) as an alternative fuel for existing oil-fired boilers. The industrial application of petroleum coke residual oil slurry requires full knowledge of its flow behavior. This paper will present the results of an experimental investigation undertaken to study the Theological properties using a rotating viscometer at shear rate up to 996 s{sup -1}. The effects of temperature, concentration, particle size distribution and additives are also investigated. The experiments show that petroleum coke residual oil slurry exhibits pseudoplastic behavior, which has favorable viscosity property under a certain condition and has broad prospect to be applied on oil-fired boilers.

  7. Problems of organizing zero-effluent production in coking plants

    SciTech Connect (OSTI)

    Maiskii, S.V.; Kagasov, V.M.

    1981-01-01

    The basic method of protecting the environment against pollution by coking plants in the future must be the organization of zero-waste production cycles. Problems associated with the elimination of effluent are considered. In the majority of plants at present, the phenolic effluent formed during coal carbonization and chemical product processing is completely utilized within the plant as a coke quenching medium (the average rate of phenolic effluent formation is 0.4 m/sup 3//ton of dry charge, which equals the irrecoverable water losses in coke quenching operations). However, the increasing adoption of dry coke cooling is inevitably associated with increasing volumes of surplus effluent which cannot be disposed of in coke quenching towers. As a result of experiments it was concluded that: 1. The utilization of phenolic effluent in closed-cycle watercooling systems does not entirely solve the effluent disposal problem. The volume of surplus effluent depends on the volume originally formed, the rate of consuming water in circulation and the time of year. In order to dispose of surplus effluent, wet quenching must be retained for a proportion of the coke produced. 2. The greatest hazards in utilizing phenolic effluent in closed-cycle watercooling systems are corrosion and the build-up of suspended solids. The water must be filtered and biochemically purified before it is fed into the closed-cycle watercooling systems. The total ammonia content after purification should not exceed 100 to 150 mg/l. 3. Stormwater and thawed snow can be used in closed-cycle water supply systems after purification. 4. The realization of zero-effluent conditions in existing plants will require modifications to the existing water supply systems.

  8. Development and installation of a high strength insulating castable for use behind buckstays and jambs of a 6-meter coke battery

    SciTech Connect (OSTI)

    Cox, F.S. ); Sich, G. ); Gladfelder, L.

    1993-01-01

    The 6-meter coke oven batteries at Armco Steel Company, L.P.'s Middletown Works experienced stand pipe base failure and numerous door fires with the original hammer-type double knife edge door design. These events resulted in deformation of the battery buckstay, armoring, tie rod, and jamb system. In 1983, these issues were addressed by releasing the jamb from the interlocking armor, replacing the jamb casting, and strengthening the buckstays in place through minimum capital expenditures. End flue refractory condition at that time was good, and little movement was measured. The 1983 repairs did not eliminate heating wall movement, and the heating wall refractories gradually deteriorated. The end flues required special maintenance attention. Broken brickwork from the refractory shapes surrounding the coke side inspection port inside the end flues blocked air ports and gas nozzles. Open brick joints between the nose brick allowed gas and heat to escape the flue toward the buckstays and jambs. This heat loss deformed jambs and reduced end flue temperatures. Jamb movement resulted in partial loss of contact between the top of the jambs and the lintel area above the jambs, resulting in some loss of brick above the jamb area. Improper coking of the coal charge at the end flues reduced yield and affected coke quality. Door emissions and pushing emissions became more difficult to control. A task group explored several strategies for solving these refractory problems. The strategies that were investigated varied widely in scope and cost. One low cost alternative explored (and the one eventually adopted) was to repair the coke side of the batteries. The scope of the repair included three components. Install a new jamb; Reseal the lintel area above the jamb with a castable refractory; and Reseal the area between the end flue and the buckstay/armor/jamb system with a castable refractory. This paper describes the project.

  9. A coke oven model including thermal decomposition kinetics of tar

    SciTech Connect (OSTI)

    Munekane, Fuminori; Yamaguchi, Yukio; Tanioka, Seiichi

    1997-12-31

    A new one-dimensional coke oven model has been developed for simulating the amount and the characteristics of by-products such as tar and gas as well as coke. This model consists of both heat transfer and chemical kinetics including thermal decomposition of coal and tar. The chemical kinetics constants are obtained by estimation based on the results of experiments conducted to investigate the thermal decomposition of both coal and tar. The calculation results using the new model are in good agreement with experimental ones.

  10. Table 38. Coal Stocks at Coke Plants by Census Division

    Gasoline and Diesel Fuel Update (EIA)

    Coal Stocks at Coke Plants by Census Division (thousand short tons) U.S. Energy Information Administration | Quarterly Coal Report, April - June 2014 Table 38. Coal Stocks at Coke Plants by Census Division (thousand short tons) U.S. Energy Information Administration | Quarterly Coal Report, April - June 2014 Census Division June 30, 2014 March 31, 2014 June 30, 2013 Percent Change (June 30) 2014 versus 2013 Middle Atlantic 547 544 857 -36.2 East North Central 1,130 963 1,313 -13.9 South

  11. Application of electrolytic in-process dressing for high-efficiency grinding of ceramic parts. Research activities 1995--96

    SciTech Connect (OSTI)

    Bandyopadhyay, B.P.

    1997-02-01

    The application of Electrolytic In-Process Dressing (ELID) for highly efficient and stable grinding of ceramic parts is discussed. This research was performed at the Institute of Physical and Chemical Research (RIKEN), Tokyo, Japan, June 1995 through August 1995. Experiments were conducted using a vertical machining center. The silicon nitride work material, of Japanese manufacture and supplied in the form of a rectangular block, was clamped to a vice which was firmly fixed on the base of a strain gage dynamometer. The dynamometer was clamped on the machining center table. Reciprocating grinding was performed with a flat-faced diamond grinding wheel. The output from the dynamometer was recorded with a data acquisition system and the normal component of the force was monitored. Experiments were carried out under various cutting conditions, different ELID conditions, and various grinding wheel bonds types. Rough grinding wheels of grit sizes {number_sign}170 and {number_sign}140 were used in the experiments. Compared to conventional grinding, there was a significant reduction in grinding force with ELID grinding. Therefore, ELID grinding can be recommended for high material removal rate grinding, low rigidity machines, and low rigidity workpieces. Compared to normal grinding, a reduction in grinding ratio was observed when ELID grinding was performed. A negative aspect of the process, this reduced G-ratio derives from bond erosion and can be improved somewhat by adjustments in the ELID current. The results of this investigation are discussed in detail in this report.

  12. A coke/soot formation model for multiphase reacting flow simulation

    SciTech Connect (OSTI)

    Chang, S.L.; Lottes, S.A.; Petrick, M.; Zhou, C.Q. |

    1997-03-01

    Coke is a by-product in petroleum fluid catalytic cracking (FCC) processes. The concentration of coke in an FCC riser reactor is a critical parameter used to evaluate the riser performance. A coke formation and transport model was developed. It was incorporated into a computational fluid dynamic (CFD) computer code, ICRKFLO, to simulate the coke formation processes in an FCC riser reactor. Based on a similar process, a soot formation model can be derived from the coke formation model and used for diesel combustion processes, where soot is emitted as one of the primary pollutants.

  13. Formation of coke from heavy crude oils in the presence of calcium carbonate

    SciTech Connect (OSTI)

    Kessick, M. A.; George, Z. M.; Schneider, L. G.

    1985-06-04

    The sulphur emissive capability, on combustion, of coke which is formed during upgrading of sulphur-containing heavy crude oils, including oil sands bitumen, and residua, is decreased by the addition of calcium carbonate, preferably in the form of limestone, to the heavy crude oil prior to coking. The presence of the limestone leads to an increased yield of liquid distillates from the coking process under preferred coking conditions. Ash remaining after combustion of the coke may be leached to recover nickel and vanadium values therefrom.

  14. Process for converting coal into liquid fuel and metallurgical coke

    DOE Patents [OSTI]

    Wolfe, Richard A.; Im, Chang J.; Wright, Robert E.

    1994-01-01

    A method of recovering coal liquids and producing metallurgical coke utilizes low ash, low sulfur coal as a parent for a coal char formed by pyrolysis with a volatile content of less than 8%. The char is briquetted and heated in an inert gas over a prescribed heat history to yield a high strength briquette with less than 2% volatile content.

  15. Use of a scale model for coke oven charging practice development

    SciTech Connect (OSTI)

    Case, E.R.; Pendergras, S.T.

    1982-01-01

    A 1/8 scale model coke oven was designed and built for use as a tool to improve coke oven charging practice. Major goals of the program were to increase coke oven productivity and decrease charging emissions. The material used to simulate coal in the model was chosen on the basis of angle of repose. the proper choice of media to simulate the coke oven charge, under a given set of operating conditions, was essential to obtain correspondence between the model and the production oven. Oven profiles were very similar after individual larry car hoppers were dropped and after leveling. Improved coke oven charging practices developed with the coke oven model, in combination with close control by operating personnel, have resulted in increased coke oven charge weights of over 1.0 ton/oven without increased charging emissions.

  16. Innovative grinding wheel design for cost-effective machining of advanced ceramics. Phase I, final report

    SciTech Connect (OSTI)

    Licht, R.H.; Ramanath, S.; Simpson, M.; Lilley, E.

    1996-02-01

    Norton Company successfully completed the 16-month Phase I technical effort to define requirements, design, develop, and evaluate a next-generation grinding wheel for cost-effective cylindrical grinding of advanced ceramics. This program was a cooperative effort involving three Norton groups representing a superabrasive grinding wheel manufacturer, a diamond film manufacturing division and a ceramic research center. The program was divided into two technical tasks, Task 1, Analysis of Required Grinding Wheel Characteristics, and Task 2, Design and Prototype Development. In Task 1 we performed a parallel path approach with Superabrasive metal-bond development and the higher technical risk, CVD diamond wheel development. For the Superabrasive approach, Task 1 included bond wear and strength tests to engineer bond-wear characteristics. This task culminated in a small-wheel screening test plunge grinding sialon disks. In Task 2, an improved Superabrasive metal-bond specification for low-cost machining of ceramics in external cylindrical grinding mode was identified. The experimental wheel successfully ground three types of advanced ceramics without the need for wheel dressing. The spindle power consumed by this wheel during test grinding of NC-520 sialon is as much as to 30% lower compared to a standard resin bonded wheel with 100 diamond concentration. The wheel wear with this improved metal bond was an order of magnitude lower than the resin-bonded wheel, which would significantly reduce ceramic grinding costs through fewer wheel changes for retruing and replacements. Evaluation of ceramic specimens from both Tasks 1 and 2 tests for all three ceramic materials did not show evidence of unusual grinding damage. The novel CVD-diamond-wheel approach was incorporated in this program as part of Task 1. The important factors affecting the grinding performance of diamond wheels made by CVD coating preforms were determined.

  17. An overview of crisis management in the coke industry

    SciTech Connect (OSTI)

    Saunders, D.A.

    1995-12-01

    Members of the American Coke and Coal Chemicals Institute (ACCCI), as responsible corporate citizens, have embraced the concepts of crisis management and progress down the various paths of planning and preparation, monitoring, media communications, community outreach, emergency response, and recovery. Many of the concepts outlined here reflect elements of crisis management guidelines developed by the Chemical Manufacturers Association (CMA). At a coke plant, crises can take the form of fires, chemical releases, labor strikes, feedstock supply disruptions, and excessive snowfall, just to name a few. The CMA defines a crisis as: ``an unplanned event that has the potential to significantly impact a company`s operability or credibility, or to pose a significant environment, economic or legal liability``; and crisis management as: ``those activities undertaken to anticipate or prevent, prepare for, respond to and recover from any incident that has the potential to greatly affect the way a company conducts its business.

  18. Integrated coke, asphalt and jet fuel production process and apparatus

    DOE Patents [OSTI]

    Shang, Jer Y.

    1991-01-01

    A process and apparatus for the production of coke, asphalt and jet fuel m a feed of fossil fuels containing volatile carbon compounds therein is disclosed. The process includes the steps of pyrolyzing the feed in an entrained bed pyrolyzing means, separating the volatile pyrolysis products from the solid pyrolysis products removing at least one coke from the solid pyrolysis products, fractionating the volatile pyrolysis products to produce an overhead stream and a bottom stream which is useful as asphalt for road pavement, condensing the overhead stream to produce a condensed liquid fraction and a noncondensable, gaseous fraction, and removing water from the condensed liquid fraction to produce a jet fuel-containing product. The disclosed apparatus is useful for practicing the foregoing process. the process provides a useful method of mass producing and jet fuels from materials such as coal, oil shale and tar sands.

  19. Low-coke rate operation under high PCI at Kobe No. 3 BF

    SciTech Connect (OSTI)

    Matsuo, Tadasu; Kanazuka, Yasuo; Hoshino, Koichi; Yoshida, Yasuo; Kitayama, Syuji; Ishiwaki, Shiro

    1997-12-31

    Kobe No. 3 blast furnace (BF) suffered tremendous damage when the Great Hanshin-Awaji Earthquake rocked the area on January 17, 1995. However, working as quickly as possible to dig out of the burden and rehabilitate various facilities, the company managed to restart the No. 3 BF on April 2. After the restart, which went smoothly, production was shifted into the low coke rate operation which was being promoted before the disaster. In October, 1995, only seven months after the restart, the nation record of 296 kg/t low coke rate could be achieved. Subsequently, in January, 1996, coke rate reached 290 kg/t and the low coke rate operation was renewed. Since that time the same level of coke rate has been maintained. The paper discusses how low coke rate operation was achieved.

  20. On the utilization of coking plant surface runoff

    SciTech Connect (OSTI)

    Evzel'man, I.B.; Kagasov, V.M.; Maiskii, S.V.; Pimenov, I.V.; Rod'kin, S.P.; Ushakov, E.B.

    1983-01-01

    Surface runoff from the industrial sites of coking plants in the East and Center of the USSR is usually diverted into a storm sewer in a mixture with the conditionally pure water. General data on the contamination of this mixture (industrial stormwater) and the snow cover at a number of coking plants in this region are tabulated. Our data on the quality of industrial stormwater show that schemes for utilization of surface runoff must include pretreatment to remove suspended matter and oils. For example, the oil concentration in melt water is 2-10 times greater than the concentration in industrial phenol-containing effluent (2). When the biochemical facilities receive surface runoff containing up to 40 g/l suspended solids, which occurs in periods of snowmelt, without treatment to remove these solids, there are difficulties with the discharge of tar from the secondary sedimenters of the biochemical treatment plant. An analysis of the literature materials (3-9) showed that the maximum allowable concentration of suspended solids in make-up water for the closed-cycle heat exchange water cooling system should apparently not exceed 25 mg/l. The level of this parameter in the make-up water of these systems at coke plants requires correction.

  1. The new Kaiserstuhl coking plant: The heating system -- Design, construction and initial operating experience

    SciTech Connect (OSTI)

    Strunk, J.

    1996-12-31

    At the end of 1992 the new coke plant Kaiserstuhl in Dortmund/Germany with presently the largest coke ovens world-wide started its production operation in close linkage to the Krupp-Hoesch Metallurgical Works after about 35 months construction time. This plant incorporating comprehensive equipment geared to improve environmental protection is also considered as the most modern coke plant of the world. The heating-system and first results of operation will be presented.

  2. Operational improvements at Jewell Coal and Coke Company`s non-recovery ovens

    SciTech Connect (OSTI)

    Ellis, C.E.; Pruitt, C.W.

    1995-12-01

    Operational improvements at Jewell Coal and Coke Company over the past five years includes safety and environmental concerns, product quality, equipment availability, manpower utilization, and productivity. These improvements with Jewell`s unique process has allowed Jewell Coal and Coke Company to be a consistent, high quality coke producer. The paper briefly explains Jewell`s unique ovens, their operating mode, improved process control, their maintenance management program, and their increase in productivity.

  3. Next generation grinding spindle for cost-effective manufacture of advanced ceramic components

    SciTech Connect (OSTI)

    Kovach, J.A.; Laurich, M.A.

    2000-01-01

    Finish grinding of advanced structural ceramics has generally been considered an extremely slow and costly process. Recently, however, results from the High-Speed, Low-Damage (HSLD) program have clearly demonstrated that numerous finish-process performance benefits can be realized by grinding silicon nitride at high wheel speeds. A new, single-step, roughing-process capable of producing high-quality silicon nitride parts at high material removal rates while dramatically reducing finishing costs has been developed.

  4. Integration of stripping of fines slurry in a coking and gasification process

    DOE Patents [OSTI]

    DeGeorge, Charles W.

    1980-01-01

    In an integrated fluid coking and gasification process wherein a stream of fluidized solids is passed from a fluidized bed coking zone to a second fluidized bed and wherein entrained solid fines are recovered by a wet scrubbing process and wherein the resulting solids-liquid slurry is stripped to remove acidic gases, the stripped vapors of the stripping zone are sent to the gas cleanup stage of the gasification product gas. The improved stripping integration is particularly useful in the combination coal liquefaction process, fluid coking of bottoms of the coal liquefaction zone and gasification of the product coke.

  5. Use of selective oxidation of petroleum residue for production of low-sulfur coke

    SciTech Connect (OSTI)

    Hairudinov, I.R.; Kul`chitskaya, O.V.; Imashev, U.B.

    1995-12-10

    The chemical nature of liquid-phase oxidation of sulfurous petroleum residues by cumene hydroperoxide was studied by a tracer technique. Sulfur compounds are selectively oxidized in the presence of catalytic additives of molybdenum salts. Desulfurization of distillate products and coke during coking of preoxidized raw materials was revealed.

  6. New additive retards coke formation in ethylene furnace tubes

    SciTech Connect (OSTI)

    Not Available

    1994-05-09

    Adding relatively small amounts of a new additive to the feed stream of a steam cracker can inhibit coke formation on the metal surfaces of processing equipment and increase furnace run time. The additive comprises a variable mixture of four to six inorganic salts in aqueous solution. The components of the additive mixture can be varied, as needed, for processing heavy feed materials such as heavy naphtha and gas oil. The process was first tested at a Korean petrochemical plant and is now operating successfully at a commercial facility in Russia. The results of the Korean trial are presented here.

  7. Teamwork in planning and carrying out the first inspection of the coke dry quenching (CDQ) plant of the Kaiserstuhl Coking Facility

    SciTech Connect (OSTI)

    Burchardt, G.

    1996-12-31

    The coke plant Kaiserstuhl operates a coke dry quenching (CDQ) plant with a downstream installed waste heat boiler to satisfy statutory pollution control rules and requirements. This CDQ which went on stream in March 1993 cools the whole coke production output from the Kaiserstuhl coke plant in counterflow to an inert cooling gas. This brief overview on the whole CDQ plant should elucidate the complex of problems posed when trying to make an exact plant revision plan. After all it was impossible to evaluate or to assess all the interior process technology relevant components during the planning stage as the plant was in operation. The revision data for the first interior check was determined and fixed by the statutory rule for steam boilers and pressure vessels. The relevant terms for this check are mandatorily prescribed. In liaison with the testing agency (RW TUEV) the date for the first revision was fixed for April 1995, that means two years after the first commissioning.

  8. Reduction in Energy Consumption & Variability in Steel Foundry Operations

    SciTech Connect (OSTI)

    Frank Peters

    2005-05-04

    This project worked to improve the efficiency of the steel casting industry by reducing the variability that occurs because of process and product variation. The project focused on the post shakeout operations since roughly half of the production costs are in this area. These improvements will reduce the amount of variability, making it easier to manage the operation and improve the competitiveness. The reduction in variability will also reduce the need for many rework operations, which will result in a direct reduction of energy usage, particularly by the reduction of repeated heat treatment operations. Further energy savings will be realized from the reduction of scrap and reduced handling. Field studies were conducted at ten steel foundries that represented the U.S. steel casting industry, for a total of over 100 weeks of production observation. These studies quantified the amount of variability, and looked toward determining the source. A focus of the data collected was the grinding operations since this is a major effort in the cleaning room, and it represents the overall casting quality. The grinding was divided into two categories, expected and unexpected. Expected grinding is that in which the location of the effort is known prior to making the casting, such as smoothing parting lines, gates, and riser contacts. Unexpected grinding, which was approximately 80% of the effort, was done to improve the surfaces at weld repair locations, to rectify burnt on sand, and other surface anomalies at random locations. Unexpected grinding represents about 80% of the grinding effort. By quantifying this effort, the project raised awareness within the industry and the industry is continuing to make improvements. The field studies showed that the amount of variation of grinding operations (normalized because of the diverse set of parts studied) was very consistent across the industry. The field studies identified several specific sources that individually contributed to

  9. Laser ultrasonic furnace tube coke monitor. Quarterly technical progress report No. 1, May 1--August 1, 1998

    SciTech Connect (OSTI)

    1998-08-15

    The overall aim of the project is to demonstrate the performance and practical use of a laser ultrasonic probe for measuring the thickness of coke deposits located within the high temperature tubes of a thermal cracking furnace. This aim will be met by constructing an optical probe that will be tested using simulated coke deposits that are positioned inside of a bench-scale furnace. Successful development of the optical coke detector will provide industry with the only available method for on-line measurement of coke deposits. The optical coke detector will have numerous uses in the refining and petrochemical sectors including monitoring of visbreakers, hydrotreaters, delayed coking units, vacuum tower heaters, and various other heavy oil heating applications where coke formation is a problem. The coke detector will particularly benefit the olefins industry where high temperature thermal crackers are used to produce ethylene, propylene, butylene and other important olefin intermediates. The ethylene industry requires development of an on-line method for gauging the thickness of coke deposits in cracking furnaces because the current lack of detailed knowledge of coke deposition profiles introduces the single greatest uncertainty in the simulation and control of modern cracking furnaces. The laser ultrasonic coke detector will provide operators with valuable new information allowing them to better optimize the decoking turnaround schedule and therefore maximize production capacity.

  10. Comprehensive report to Congress: Clean Coal Technology Program: Blast furnace granulated coal injection system demonstration project: A project proposed by: Bethlehem Steel Corporation

    SciTech Connect (OSTI)

    Not Available

    1990-10-01

    Bethlehem Steel Corporation (BSC), of Bethlehem, Pennsylvania, has requested financial assistance from DOE for the design, construction, and operation of a 2800-ton-per-day blast furnace granulated coal injection (BFGCI) system for each of two existing iron-making blast furnaces. The blast furnaces are located at BSC's facilities in Burns Harbor, Indiana. BFGCI technology involves injecting coal directly into an iron-making blast furnace and subsequently reduces the need for coke on approximately a pound of coke for pound of coal basis. BFGCI also increases blast furnace production. Coke will be replaced with direct coal injection at a rate of up to 400 pounds per NTHM. The reducing environment of the blast furnace enables all of the sulfur in the coal to be captured by the slag and hot metal. The gases exiting the blast furnace are cleaned by cyclones and then wet scrubbing to remove particulates. The cleaned blast furnace gas is then used as a fuel in plant processes. There is no measurable sulfur in the off gas. The primary environmental benefits derived from blast furnace coal injection result from the reduction of coke requirements for iron making. Reduced coke production will result in reduced releases of environmental contaminants from coking operations. 5 figs.

  11. Organophosphorus compounds as coke inhibitors during naphtha pyrolysis. Effect of benzyl diethyl phosphite and triphenylphosphine sulfide

    SciTech Connect (OSTI)

    Das, P.; Prasad, S.; Kunztu, D.

    1992-09-01

    This paper reports that significant reduction in the rate of coke formation during naphtha pyrolysis was achieved by adding benzyl diethyl phosphite or triphenylphosphine sulfide to the feed. Although the yield of carbon oxides was reduced, there was no effect of these additives on the hydrocarbon yields. Addition of these organophosphorus compounds significantly reduced the concentration of metals, such as iron, nickel, and chromium, incorporated in the coke. A previously proposed model for coke inhibition due to the formation of a passivating metal-phosphorus complex could satisfactorily correlate the data.

  12. Glass-coating and cleaning system to prevent carbon deposition on coke oven walls

    SciTech Connect (OSTI)

    Takahira, Takuya; Ando, Takeshi; Kasaoka, Shizuki; Yamauchi, Yutaka

    1997-12-31

    The new technology for protecting the coking chamber bricks from damage by hard-pushing is described. The technology consists of the glass coating on the wall bricks and a wall cleaner to blow deposited carbon. For the glass coating, a specially developed glaze is sprayed onto the wall bricks by a spraying device developed to completely spray one coking chamber in a few minutes. The wall cleaner is installed on a pusher ram in the facility to automatically blow air at a sonic speed during coke pushing. The life of the glazed layer is estimated to be over two years.

  13. Table 22. Average Price of U.S. Coke Imports

    U.S. Energy Information Administration (EIA) Indexed Site

    2. Average Price of U.S. Coke Imports (dollars per short ton) Year to Date Continent and Country of Origin January - March 2016 October - December 2015 January - March 2015 2016 2015 Percent Change North America Total 181.85 113.11 213.82 181.85 213.82 -15.0 Canada 181.85 113.11 213.82 181.85 213.82 -15.0 Europe Total 270.94 416.80 770.50 270.94 770.50 -64.8 Austria - 1,788.00 - - - - France - 1,110.35 - - - - Germany, Federal Republic of - - 206.27 - 206.27 - Italy 265.37 300.11 - 265.37 - -

  14. Surface working of 304L stainless steel: Impact on microstructure, electrochemical behavior and SCC resistance

    SciTech Connect (OSTI)

    Acharyya, S.G.; Khandelwal, A.; Kain, V.; Kumar, A.; Samajdar, I.

    2012-10-15

    The effect of surface working operations on the microstructure, electrochemical behavior and stress corrosion cracking resistance of 304L stainless steel (SS) was investigated in this study. The material was subjected to (a) solution annealing (b) machining and (c) grinding operations. Microstructural characterization was done using stereo microscopy and electron back scattered diffraction (EBSD) technique. The electrochemical nature of the surfaces in machined, ground and solution annealed condition were studied using potentiodynamic polarization and scanning electrochemical microscopy (SECM) in borate buffer solution. The stress corrosion cracking resistance of 304L SS in different conditions was studied by exposing the samples to boiling MgCl{sub 2} environment. Results revealed that the heavy plastic deformation and residual stresses present near the surface due to machining and grinding operations make 304L SS electrochemically more active and susceptible to stress corrosion cracking. Ground sample showed highest magnitude of current density in the passive potential range followed by machined and solution annealed 304L SS. Micro-electrochemical studies established that surface working promotes localized corrosion along the surface asperities which could lead to crack initiation. - Highlights: Black-Right-Pointing-Pointer Machining/grinding produce extensive grain fragmentation near the surface of 304L SS. Black-Right-Pointing-Pointer Machining/grinding result in martensitic transformation near the surface of 304L SS. Black-Right-Pointing-Pointer Machining/grinding drastically reduce the SCC resistance of 304L SS in chloride. Black-Right-Pointing-Pointer Machining/grinding make the surface of 304L SS electrochemically much more active. Black-Right-Pointing-Pointer SECM study reveal that preferential dissolution takes place along surface asperities.

  15. An investigation of the properties of pitch coke modified by chemically active additives

    SciTech Connect (OSTI)

    Kulakov, V.V.; Fedeneva, E.N.; Neproshin, E.I.

    1984-01-01

    The results of an investigation are presented of the influence of chemically active additives on the yield and properties of coke from hard-coal pitch. A comparison has been made of the efficacy of the influence of these additives.

  16. Cryogenic fractionator gas as stripping gas of fines slurry in a coking and gasification process

    DOE Patents [OSTI]

    DeGeorge, Charles W.

    1981-01-01

    In an integrated coking and gasification process wherein a stream of fluidized solids is passed from a fluidized bed coking zone to a second fluidized bed and wherein entrained solid fines are recovered by a scrubbing process and wherein the resulting solids-liquid slurry is stripped with a stripping gas to remove acidic gases, at least a portion of the stripping gas comprises a gas comprising hydrogen, nitrogen and methane separated from the coker products.

  17. The Videofil probe, a novel instrument to extend the coke oven service life

    SciTech Connect (OSTI)

    Gaillet, J.P.; Isler, D.

    1997-12-31

    To prolong the service life of coke oven batteries, the Centre de Pyrolyse de Marienau developed the Videofil probe, a novel instrument to conduct diagnoses and to help repair operations of coke ovens. The Videofil probe is a flexible non-water-cooled endoscope which is used to locate flue wall damage and estimate its importance, to define the oven zones to repair and guide the repair work and to control the quality of the repair work and its durability.

  18. Coke gasification: the influence and behavior of inherent catalytic mineral matter

    SciTech Connect (OSTI)

    Mihaela Grigore; Richard Sakurovs; David French; Veena Sahajwalla

    2009-04-15

    Gasification of coke contributes to its degradation in the blast furnace. In this study, the effect of gasification on the inherent catalytic minerals in cokes and their reciprocal influence on gasification are investigated. The catalytic mineral phases identified in the cokes used in this study were metallic iron, iron sulfides, and iron oxides. Metallic iron and pyrrhotite were rapidly oxidized during gasification to iron oxide. The catalysts had a strong influence on the apparent rates at the initial stages of reaction. As gasification proceeds, their effect on the reaction rate diminishes as a result of reducing the surface contact between catalyst and carbon matrix because of carbon consumption around the catalyst particles; with extended burnout the reactivity of the coke becomes increasingly dependent on surface area. The reaction rate in the initial stages was also influenced by the particle size of the catalytic minerals; for a given catalytic iron level, the cokes whose catalytic minerals were more finely dispersed had a higher apparent reaction rate than cokes containing larger catalytic particles. Iron, sodium, and potassium in the amorphous phase did not appear to affect the reaction rate. 40 refs., 16 figs., 6 tabs.

  19. Grinding energy and physical properties of chopped and hammer-milled barley, wheat, oat, and canola straws

    SciTech Connect (OSTI)

    J.S. Tumuluru; L.G. Tabil; Y. Song; K.L. Iroba; V. Meda

    2014-01-01

    In the present study, specific energy for grinding and physical properties of wheat, canola, oat and barley straw grinds were investigated. The initial moisture content of the straw was about 0.130.15 (fraction total mass basis). Particle size reduction experiments were conducted in two stages: (1) a chopper without a screen, and (2) a hammer mill using three screen sizes (19.05, 25.4, and 31.75 mm). The lowest grinding energy (1.96 and 2.91 kWh t-1) was recorded for canola straw using a chopper and hammer mill with 19.05-mm screen size, whereas the highest (3.15 and 8.05 kWh t-1) was recorded for barley and oat straws. The physical properties (geometric mean particle diameter, bulk, tapped and particle density, and porosity) of the chopped and hammer-milled wheat, barley, canola, and oat straw grinds measured were in the range of 0.984.22 mm, 3680 kg m-3, 49119 kg m-3, 6001220 kg m-3, and 0.90.96, respectively. The average mean particle diameter was highest for the chopped wheat straw (4.22-mm) and lowest for the canola grind (0.98-mm). The canola grinds produced using the hammer mill (19.05-mm screen size) had the highest bulk and tapped density of about 80 and 119 kg m-3; whereas, the wheat and oat grinds had the lowest of about 58 and 8890 kg m-3. The results indicate that the bulk and tapped densities are inversely proportional to the particle size of the grinds. The flow properties of the grinds calculated are better for chopped straws compared to hammer milled using smaller screen size (19.05 mm).

  20. Blast furnace gas fired boiler for Eregli Iron and Steel Works (Erdemir), Turkey

    SciTech Connect (OSTI)

    Green, J.; Strickland, A.; Kimsesiz, E.; Temucin, I.

    1996-11-01

    Eregli Demir ve Celik Fabriklari T.A.S. (Eregli Iron and Steel Works Inc.), known as Erdemir, is a modern integrated iron and steel works on the Black Sea coast of Turkey, producing flat steel plate. Facilities include two blast furnaces, coke ovens, and hot and cold rolling mills, with a full supporting infrastructure. Four oil- and gas-fired steam boilers provide steam for electric power generation, and to drive steam turbine driven fans for Blast Furnace process air. Two of these boilers (Babcock and Wilcox Type FH) were first put into operation in 1965, and still reliably produce 100 tons/hour of steam at a pressure of 44 bar and a temperature of 410 C. In 1989 Erdemir initiated a Capacity Increase and Modernization Project to increase the steel production capability from two million to three million tons annually. This project also incorporates technology to improve the product quality. Its goals include a reduction in energy expenses to improve Erdemir`s competitiveness. The project`s scheduled completion is in late 1995. The by-product gases of the blast furnaces, coke ovens, and basic oxygen furnaces represent a considerable share of the consumed energy in an integrated iron and steel works. Efficient use of these fuels is an important factor in improving the overall efficiency of the operation.

  1. Development of an Advanced Combined Heat and Power (CHP) System Utilizing Off-Gas from Coke Calcination

    SciTech Connect (OSTI)

    2009-02-01

    This factsheet describes a research project whose goal is to reduce the energy and carbon intensity of the calcined coke production process.

  2. Fatigue life improvement factors obtained by weld reinforcement and toe grinding

    SciTech Connect (OSTI)

    Mullen, C.L.; Merwin, J.E.

    1982-01-01

    The potential of weld reinforcement and toe grinding techniques for improving the fatigue life of welded joints protected from seawater corrosion is quantified based on tests performed in air on welded plate specimens. Results are presented in terms of median fatigue life improvement factors and prediction intervals obtained by linear regression analysis. The significant improvements possible with weld reinforcement are shown to be caused partly by a slight alleviation of the stress concentration imposed by sharp angles at the weld toe. Variable improvements observed for toe ground welds are shown to be associated with the variable surface modifications which different tools impose on weld toes. Load and weld geometry are shown to be particulary important when bending stresses are applied to the weld toe, since reinforcement affects the bending moment at the toe section and toe grinding affects the conditions at the highly stressed outer fibers. 14 references.

  3. Electrolytic In-process Dressing (ELID) for high-efficiency, precision grinding of ceramic parts: An experiment study

    SciTech Connect (OSTI)

    Bandyopadhyay, B.P.

    1995-08-01

    This report describes Electrolytic In-process Dressing (ELID) as applied to the efficient, high-precision grinding of structural ceramics, and describes work performed jointly by Dr. B.P. Bandyopadhyay, University of North Dakota, and Dr. R. Ohmori, of the Institute of Physical and Chemical Research (RINEN), Tokyo, Japan, from June through August, 1994. Dr. Ohmori pioneered the novel ELID grinding technology which incorporates electrolytically enhanced, in-process dressing of metal bonded superabrasive wheels. The principle of ELID grinding technology is discussed in the report as will its application for rough grinding and precision grinding. Two types of silicon nitride based ceramics (Kyocerals Si{sub 3}N{sub 4}, and Eaton`s SRBSN) were ground under various conditions with ELID methods. Mirror surface finishes were obtained with {number_sign} 4000 mesh size wheel (average grain size = 4 {mu}m). Results of these investigations are presented in this report. These include the effects of wheel bond type, type of power supply, abrasive grit friability, and cooling fluid composition. The effects of various parameters are discussed in terms of the mechanisms of ELID grinding, and in particular, the manner of boundary layer formation on the wheels and abrasive grit protrusion.

  4. Effect of coal and coke qualities on blast furnace injection and productivity at Taranto

    SciTech Connect (OSTI)

    Salvatore, E.; Calcagni, M.; Eichinger, F.; Rafi, M.

    1995-12-01

    Injection rates at Taranto blast furnaces Nos. 2 and 4, for more than 16 months, was maintained above 175 kg/thm. Monthly average injection rate for two months stabilized above 190 kg/thm. This performance was possible due to the very high combined availabilities of Taranto blast furnaces and the KST injection system. Based upon this experience the quantitative relationships between coke/coal and blast furnace operational parameters were studied and are shown graphically. During this period due to coke quality changes, injection rate had to be reduced. The effect of using coke breeze in coke/ferrous charge as well as coal blend was also evaluated. Permeability of the furnace was found to be directly affected by O{sub 2} enrichment level, while at a high PCI rate no correlation between actual change in coke quality and permeability could be established. The future of PCI technology lies in better understanding of relationships between material specifications and blast furnace parameters of which permeability is of prime importance.

  5. Automatic coke oven heating control system at Burns Harbor for normal and repair operation

    SciTech Connect (OSTI)

    Battle, E.T.; Chen, K.L.

    1997-12-31

    An automatic heating control system for coke oven batteries was developed in 1985 for the Burns Harbor No. 1 battery and reported in the 1989 Ironmaking Conference Proceedings. The original system was designed to maintain a target coke temperature at a given production level under normal operating conditions. Since 1989, enhancements have been made to this control system so that it can also control the battery heating when the battery is under repair. The new control system has improved heating control capability because it adjusts the heat input to the battery in response to anticipated changes in the production schedule. During a recent repair of this 82 oven battery, the pushing schedule changed from 102 ovens/day to 88 ovens/day, then back to 102 ovens/day, then to 107 ovens/day. During this repair, the control system was able to maintain the coke temperature average standard deviation at 44 F, with a maximum 75 F.

  6. FINAL REPORT: Reduction in Energy Consumption and Variability in Steel Foundry Operations

    SciTech Connect (OSTI)

    F. Peters

    2005-05-24

    This project worked to improve the efficiency of the steel casting industry by reducing the variability that occurs because of process and product variation. The project focused on the post shakeout operations since roughly half of the production costs are in this area. These improvements will reduce the amount of variability, making it easier to manage the operation and improve the competitiveness. The reduction in variability will also reduce the need for many rework operations, which will result in a direct reduction of energy usage, particularly by the reduction of repeated heat treatment operations. Further energy savings will be realized from the reduction of scrap and reduced handling. Field studies were conducted at ten steel foundries that represented the U.S. steel casting industry, for a total of over 100 weeks of production observation. These studies quantified the amount of variability, and looked toward determining the source. A focus of the data collected was the grinding operations since this is a major effort in the cleaning room, and it represents the overall casting quality. The grinding was divided into two categories, expected and unexpected. Expected grinding is that in which the location of the effort is known prior to making the casting, such as smoothing parting lines, gates, and riser contacts. Unexpected grinding, which was approximately 80% of the effort, was done to improve the surfaces at weld repair locations, to rectify burnt on sand, and other surface anomalies at random locations. Unexpected grinding represents about 80% of the grinding effort. By quantifying this effort, the project raised awareness within the industry and the industry is continuing to make improvements. The field studies showed that the amount of variation of grinding operations (normalized because of the diverse set of parts studied) was very consistent across the industry. The field studies identified several specific sources that individually contributed to

  7. Light oil yield improvement project at Granite City Division Coke/By-Product Plant

    SciTech Connect (OSTI)

    Holloran, R.A.

    1995-12-01

    Light oil removal from coke oven gas is a process that has long been proven and utilized throughout many North American Coke/By-Products Plants. The procedures, processes, and equipment requirements to maximize light oil recovery at the Granite City By-Products Plant will be discussed. The Light Oil Yield Improvement Project initially began in July, 1993 and was well into the final phase by February, 1994. Problem solving techniques, along with utilizing proven theoretical recovery standards were applied in this project. Process equipment improvements and implementation of Operator/Maintenance Standard Practices resulted in an average yield increase of 0.4 Gals./NTDC by the end of 1993.

  8. Coal flow aids reduce coke plant operating costs and improve production rates

    SciTech Connect (OSTI)

    Bedard, R.A.; Bradacs, D.J.; Kluck, R.W.; Roe, D.C.; Ventresca, B.P.

    2005-06-01

    Chemical coal flow aids can provide many benefits to coke plants, including improved production rates, reduced maintenance and lower cleaning costs. This article discusses the mechanisms by which coal flow aids function and analyzes several successful case histories. 2 refs., 10 figs., 1 tab.

  9. Who lives near coke plants and oil refineries An exploration of the environmental inequity hypothesis

    SciTech Connect (OSTI)

    Graham, J.D.; Beaulieu, N.D.; Sussman, D.; Sadowitz, M.; Li, Y.C. )

    1999-04-01

    Facility-specific information on pollution was obtained for 36 coke plants and 46 oil refineries in the US and matched with information on populations surrounding these 82 facilities. These data were analyzed to determine whether environmental inequities were present, whether they were more economic or racial in nature, and whether the racial composition of nearby communities has changed significantly since plants began operations. The Census tracts near coke plants have a disproportionate share of poor and nonwhite residents. Multivariate analyses suggest that existing inequities are primarily economic in nature. The findings for oil refineries are not strongly supportive of the environmental inequity hypothesis. Rank ordering of facilities by race, poverty, and pollution produces limited (although not consistent) evidence that the more risky facilities tend to be operating in communities with above-median proportions of nonwhite residents (near coke plants) and Hispanic residents (near oil refineries). Over time, the radical makeup of many communities near facilities has changed significantly, particularly in the case of coke plants sited in the early 1900s. Further risk-oriented studies of multiple manufacturing facilities in various industrial sectors of the economy are recommended.

  10. ITP Steel: Theoretical Minimum Energies to Produce Steel for...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Theoretical Minimum Energies to Produce Steel for Selected Conditions, March 2000 ITP Steel: Theoretical Minimum Energies to Produce Steel for Selected Conditions, March 2000 ...

  11. Ultrahigh carbon steels, Damascus steels, and superplasticity

    SciTech Connect (OSTI)

    Sherby, O.D.; Wadsworth, J.

    1997-04-01

    The processing properties of ultrahigh carbon steels (UHCSs) have been studied at Stanford University over the past twenty years. These studies have shown that such steels (1 to 2.1% C) can be made superplastic at elevated temperature and can have remarkable mechanical properties at room temperature. It was the investigation of these UHCSs that eventually brought us to study the myths, magic, and metallurgy of ancient Damascus steels, which in fact, were also ultrahigh carbon steels. These steels were made in India as castings, known as wootz, possibly as far back as the time of Alexander the Great. The best swords are believed to have been forged in Persia from Indian wootz. This paper centers on recent work on superplastic UHCSs and on their relation to Damascus steels. 32 refs., 6 figs.

  12. Combined Grinding and Drying of Biomass in One Operation Phase I

    SciTech Connect (OSTI)

    Sokhansanj, S

    2008-06-26

    First American Scientific Corporation (FASC) has developed a unique and innovative grinder/dryer called KDS Micronex. The KS (Kinetic Disintegration System) combines two operations of grinding and drying into a single operation which reduces dependence on external heat input. The machine captures the heat of comminution and combines it will centrifugal forces to expedite moisture extraction from wet biomass. Because it uses mechanical forces rather than providing direct heat to perform the drying operation, it is a simpler machine and uses less energy than conventional grinding and drying operations which occur as two separate steps. The entire compact unit can be transported on a flatbed trailer to the site where biomass is available. Hence, the KDS Micronex is a technology that enables inexpensive pretreatment of waste materials and biomass. A well prepared biomass can be used as feed, fuel or fertilizer instead of being discarded. Electricity and chemical feedstock produced from such biomass would displace the use of fossil fuels and no net greenhouse gas emissions would result from such bio-based operations. Organic fertilizers resulting from the KS Micronex grinding/drying process will be pathogen-free unlike raw animal manures. The feasibility tests on KS during Phase I showed that a prototype machine can be developed, field tested and the technology demonstrated for commercial applications. The present KDS machine can remove up to 400 kg/h of water from a wet feed material. Since biomass processors demand a finished product that is only 10% moist and most raw materials like corn stover, bagasse, layer manure, cow dung, and waste wood have moisture contents of the order of 50%, this water removal rate translates to a production rate of roughly half a ton per hour. this is too small for most processors who are unwilling to acquire multiple machines because of the added complexity to the feed and product removal systems. The economics suffer due to small

  13. Torrefaction reduction of coke formation on catalysts used in esterification and cracking of biofuels from pyrolysed lignocellulosic feedstocks

    SciTech Connect (OSTI)

    Kastner, James R; Mani, Sudhagar; Hilten, Roger; Das, Keshav C

    2015-11-04

    A bio-oil production process involving torrefaction pretreatment, catalytic esterification, pyrolysis, and secondary catalytic processing significantly reduces yields of reactor char, catalyst coke, and catalyst tar relative to the best-case conditions using non-torrefied feedstock. The reduction in coke as a result of torrefaction was 28.5% relative to the respective control for slow pyrolysis bio-oil upgrading. In fast pyrolysis bio-oil processing, the greatest reduction in coke was 34.9%. Torrefaction at 275.degree. C. reduced levels of acid products including acetic acid and formic acid in the bio-oil, which reduced catalyst coking and increased catalyst effectiveness and aromatic hydrocarbon yields in the upgraded oils. The process of bio-oil generation further comprises a catalytic esterification of acids and aldehydes to generate such as ethyl levulinate from lignified biomass feedstock.

  14. Supporting steel

    SciTech Connect (OSTI)

    Badra, C.

    1995-10-01

    The US Department of Energy (DOE) and the American Iron and Steel Institute (AISI) have just completed a pilot program on the technical and economic viability of direct ironmaking by a process based on bath smelting. In this process, oxygen, prereduced iron ore pellets, coal, and flux are charged into a molten slag bath containing a high percentage of carbon. The carbon removes oxygen from the iron ore and generates carbon monoxide and liquid iron. Oxygen is then injected to burn some of the carbon monoxide gas before it leaves the smelting vessel. The partially combusted gas is sued to preheat and prereduced the ore before it is injected into the bath. There are several competing cokeless ironmaking processes in various stages of development around the world. A brief comparison of these processes provides a useful perspective with which to gauge the progress and objectives of the AISI-DOE research initiative. The principal competing foreign technologies include the Corex process, DIOS, HIsmelt, and Jupiter. The advantages of the direct ironmaking process examined by AISI-DOE were not sufficiently demonstrated to justify commercialization without further research. However, enough knowledge was gained from laboratory and pilot testing to teach researchers how to optimize the direct ironmaking process and to provide the foundation for future research. Researchers now better understand issues such as the dissolution of materials, reduction mechanisms and rates, slag foaming and control, the behavior of sulfur, dust generation, and the entire question of energy efficiency--including post combustion and the role of coal/volatile matter.

  15. Steel Industry Profile

    Broader source: Energy.gov [DOE]

    The steel industry is critical to the U.S. economy. Steel is the material of choice for many elements of manufacturing, construction, transportation, and various consumer products. Traditionally...

  16. Recycling of rubber tires in electric arc furnace steelmaking: simultaneous combustion of metallurgical coke and rubber tyres blends

    SciTech Connect (OSTI)

    Magdalena Zaharia; Veena Sahajwalla; Byong-Chul Kim; Rita Khanna; N. Saha-Chaudhury; Paul O'Kane; Jonathan Dicker; Catherine Skidmore; David Knights

    2009-05-15

    The present study investigates the effect of addition of waste rubber tires on the combustion behavior of its blends with coke for carbon injection in electric arc furnace steelmaking. Waste rubber tires were mixed in different proportions with metallurgical coke (MC) (10:90, 20:80, 30:70) for combustion and pyrolysis at 1473 K in a drop tube furnace (DTF) and thermogravimetric analyzer (TGA), respectively. Under experimental conditions most of the rubber blends indicated higher combustion efficiencies compared to those of the constituent coke. In the early stage of combustion the weight loss rate of the blends is much faster compared to that of the raw coke due to the higher volatile yield of rubber. The presence of rubber in the blends may have had an impact upon the structure during the release and combustion of their high volatile matter (VM) and hence increased char burnout. Measurements of micropore surface area and bulk density of the chars collected after combustion support the higher combustion efficiency of the blends in comparison to coke alone. The surface morphology of the 30% rubber blend revealed pores in the residual char that might be attributed to volatile evolution during high temperature reaction in oxygen atmosphere. Physical properties and VM appear to have a major effect upon the measured combustion efficiency of rubber blends. The study demonstrates that waste rubber tires can be successfully co-injected with metallurgical coke in electric arc furnace steelmaking process to provide additional energy from combustion. 44 refs., 11 figs., 2 tabs.

  17. High-strength insulating castable used behind coke-oven buckstays and jambs

    SciTech Connect (OSTI)

    Sich, G. Jr. ); Gladfelder, L.A. . Iron and Steel Monolithics); Cox, F.S.

    1993-10-01

    Conventional pumpable, clay-based grouting materials used behind the armor/jamb systems were inadequate. Open brick joints caused reduced end flue temperatures which resulted in improper coking with reduced yields and coke quality, as well as difficulties in controlling door emissions. Based on criteria established by an Armco task force, a unique commercial product supplied by North American Refractories was located that had the potential of meeting these requirements. A laboratory trial casting program was undertaken by Armco that verified the potential of this castable refractory. Development programs by Armco and North American Refractories were established to optimize the properties of the refractory. Actual oven repairs have demonstrated that the castable developed meets all requirements for successful performance. These include: absence of castable failures; nonspalling; repairable through ceramic welding; and acceptable flowability.

  18. A mathematical model for the estimation of flue temperature in a coke oven

    SciTech Connect (OSTI)

    Choi, K.I.; Kim, S.Y.; Suo, J.S.; Hur, N.S.; Kang, I.S.; Lee, W.J.

    1997-12-31

    The coke plants at the Kwangyang works has adopted an Automatic Battery Control (ABC) system which consists of four main parts, battery heating control, underfiring heat and waste gas oxygen control, pushing and charging schedule and Autotherm-S that measures heating wall temperature during pushing. The measured heating wall temperature is used for calculating Mean Battery Temperature (MBT) which is average temperature of flues for a battery, but the Autotherm-S system can not provide the flue temperatures of an oven. This work attempted to develop mathematical models for the estimation of the flue temperature using the measured heating wall temperature and to examine fitness of the mathematical model for the coke plant operation by analysis of raw gas temperature at the stand pipe. Through this work it is possible to reflect heating wall temperature in calculating MBT for battery heating control without the interruption caused by a maintenance break.

  19. Comminuting irradiated ferritic steel

    DOE Patents [OSTI]

    Bauer, Roger E.; Straalsund, Jerry L.; Chin, Bryan A.

    1985-01-01

    Disclosed is a method of comminuting irradiated ferritic steel by placing the steel in a solution of a compound selected from the group consisting of sulfamic acid, bisulfate, and mixtures thereof. The ferritic steel is used as cladding on nuclear fuel rods or other irradiated components.

  20. Incorporation of deuterium in coke formed on an acetylene hydrogenation catalyst

    SciTech Connect (OSTI)

    Larsson, M.; Jansson, J.; Asplund, S.

    1996-09-01

    In selective hydrogenation of acetylene in excess ethylene, considerable amounts of coke or {open_quotes}green oils{close_quotes} are formed and accumulate on the catalyst. A fraction of the acetylene undergoes oligomerization reactions producing C{sub 4}`s and larger hydrocarbons. Compounds larger than C{sub 8} are retained on the catalysts surface or as a condensed phase in the pore system. The reaction mechanism is largely unknown but several authors have postulated that oligomerization occurs through dissociatively adsorbed acetylene (2), i.e., C{sub 2}H(ads) and C{sub 2}(ads). In this paper a novel method of studying the coke formation on a catalyst is introduced. Deuterium is incorporated in the coke during hydrogenation of acetylene, and during temperature-programmed oxidation (TPO) experiments the deuterium content is analyzed. The objective is to shed some light on the mechanism for oligomer formation in this system. The catalyst, Pd/{alpha}-Al{sub 2}O{sub 3}, was prepared by the impregnation of {alpha}-alumina (Sued-Chemie) with a solution of Pd(NO{sub 3}){sub 2} in 30% HNO{sub 3}. 8 refs., 4 figs.

  1. Health-hazard evaluation report No. HETA-88-377-2120, Armco Coke Oven, Ashland Kentucky

    SciTech Connect (OSTI)

    Kinnes, G.M.; Fleeger, A.K.; Baron, S.L.

    1991-06-01

    In response to a request from the Oil, Chemical and Atomic Workers International Union, a study was made of possible hazardous working conditions at ARMCO Coke Oven (SIC-3312), Ashland, Kentucky. The facility produces about 1,000,000 tons of coke annually. Of the approximately 400 total employees at the coke oven site, 55 work in the by products area. Air quality sampling results indicated overexposure to both benzene (71432) and coal tar pitch volatiles (CTPVs). Airborne levels of benzene ranged as high as 117 parts per million (ppm) with three of 17 samples being above the OSHA limit of 1ppm. Airborne concentrations of CTPVs ranged as high as 0.38mg/cu m with two of six readings being above OSHA limit of 0.2mg/cu m. Several polynuclear aromatic hydrocarbons were also detected. The authors conclude that by products area workers are potentially overexposed to carcinogens, including benzene, CTPVs, and polynuclear aromatic hydrocarbons. An epidemiologic study is considered unlikely to yield meaningful information at this time, due to the small number of workers and the short follow up period. The authors recommend specific measures for reducing potential employee exposures, including an environmental sampling program, a preventive maintenance program, improved housekeeping procedures, and reducing exposure in operators' booths.

  2. A practical grinding-assisted dry synthesis of nanocrystalline NiMoO{sub 4} polymorphs for oxidative dehydrogenation of propane

    SciTech Connect (OSTI)

    Chen Miao; Wu Jialing; Liu Yongmei; Cao Yong; Guo Li; He Heyong; Fan Kangnian

    2011-12-15

    A practical two-stage reactive grinding-assisted pathway waste-free and cost-effective for the synthesis of NiMoO{sub 4} has been successfully developed. It was demonstrated that proper design in synthetic strategy for grinding plays a crucial role in determining the ultimate polymorph of NiMoO{sub 4}. Specifically, direct grinding (DG) of MoO{sub 3} and NiO rendered {alpha}-NiMoO{sub 4} after annealing, whereas sequential grinding (SG) of the two independently pre-ground oxides followed by annealing generated {beta}-NiMoO{sub 4} solid solution. Characterizations in terms of Raman and X-ray diffraction suggest the creation of {beta}-NiMoO{sub 4} precursor in the latter alternative is the key aspect for the formation of {beta}-NiMoO{sub 4}. The DG-derived {alpha}-NiMoO{sub 4} tested by oxidative dehydrogenation of propane exhibited superior activity in contrast to its analog synthesized via conventional coprecipitation. It is suggested that the favorable chemical composition facilely obtained via grinding in contrast to that by coprecipitation was essential for achieving a more selective production of propylene. - Graphical Abstract: Grinding-assisted synthesis of NiMoO{sub 4} offers higher and more reproducible activities in contrast to coprecipitation for oxidative dehydrogenation of propane, and both {alpha}- and {beta}-NiMoO{sub 4} can be synthesized. Highlights: Black-Right-Pointing-Pointer NiMoO{sub 4} was prepared through grinding-assisted pathway. Black-Right-Pointing-Pointer Direct/sequential grinding rendered {alpha}-, {beta}-NiMoO{sub 4}, respectively. Black-Right-Pointing-Pointer Grinding-derived {alpha}-NiMoO{sub 4} showed high and reproducible activity for oxidative dehydrogenation of propane.

  3. High productivity injection practices at Rouge Steel

    SciTech Connect (OSTI)

    Barker, D.H.; Hegler, G.L.; Falls, C.E.

    1995-12-01

    Rouge Steel Company, located in Dearborn, Michigan, operates two blast furnaces. The smaller of the pair, ``B`` Furnace, has a hearth diameter of 20 feet and 12 tuyeres. It has averaged 2,290 NTHM (net ton of hot metal) per day of 8.2 NTHM per 100 cubic feet of working volume. ``C`` Furnace has a hearth diameter of 29 feet and 20 tuyeres. Both of these furnaces are single tap hole furnaces. Prior to its reline in 1991, ``C`` Furnace was producing at a rate of 3,300 NTHM/day or about 6.25 NTHM/100 cfwv. In November, 1994 it averaged 5,106 NTHM/day or 9.6 NTHM/100 cfwv. This paper discusses how the current production rates were achieved. Also, the areas that needed to be addressed as production increased will be described. These areas include casthouse arrangement and workload, hot metal ladle capacity, slag pot capacity and charging capability. Coupled with the high blast temperature capability, the furnace was provided with a new natural gas injection system that injected the gas through the blowpipes and a natural gas injection system to enrich the stove gas. Following the furnace reline, natural gas has been used in three ways: tuyere level control; combination injection; and stove gas enrichment. Coke consumption rate has also decreased per NTHM.

  4. Methods of forming steel

    DOE Patents [OSTI]

    Branagan, Daniel J.; Burch, Joseph V.

    2001-01-01

    In one aspect, the invention encompasses a method of forming a steel. A metallic glass is formed and at least a portion of the glass is converted to a crystalline steel material having a nanocrystalline scale grain size. In another aspect, the invention encompasses another method of forming a steel. A molten alloy is formed and cooled the alloy at a rate which forms a metallic glass. The metallic glass is devitrified to convert the glass to a crystalline steel material having a nanocrystalline scale grain size. In yet another aspect, the invention encompasses another method of forming a steel. A first metallic glass steel substrate is provided, and a molten alloy is formed over the first metallic glass steel substrate to heat and devitrify at least some of the underlying metallic glass of the substrate.

  5. Relational contracting and the law and economics of vertical integration: a study of the economics of petroleum coking, processing, and consumption

    SciTech Connect (OSTI)

    Erickson, J.R.

    1981-01-01

    The basis for this study was an antitrust suit brought by the Federal Trade Commission against the Great Lakes Carbon Corp., a processor and reseller of green petroleum coke, and eight petroleum refiners. The respondents in this case were accused of using long-term contracts to foreclose the markets for both green and processed petroleum coke. Chapter 1 develops a theory of exchange and the contracts governing exchange. Chapter 2 describes the petroleum-coke industry and the nature of green coke exchange. It explains the reasons for the highly concentrated structure of the green-coke market in terms of the technology of petroleum-coke production and consumption and the physical and byproduct nature of petroleum coke. Chapter 3 takes a large number of green-coke contracts and breaks them down into their various relevant provisions. These provisions are then grouped according to their purpose and the characteristics of the firms employing them and shows that differences between the contracts can be explained by differences in the risks to firms of engaging in green coke exchange. Chapter 4 discusses the implications of vertical restrictions from the point of view of relational contracting using the data adduced in Chapter 3.

  6. The impact of energy prices on technology choice in the United States steel industry

    SciTech Connect (OSTI)

    Karlson, S.H. . Dept. of Economics); Boyd, G. )

    1991-01-01

    In the last thirty years US steel producers have replaced their aging open hearth steel furnaces with basic oxygen or large electric arc furnaces. This choice of technology leads to the opportunity to substitute electricity for fossil fuels as a heat source. We extend earlier research to investigate whether or not energy prices affect this type of technology adoption as predicted by economic theory. The econometric model uses the seemingly unrelated Tobit'' method to capture the effects of the industry's experience with both technologies, technical change, and potential cost reductions, as well as energy prices, on adoption. When we include the prices of electricity and coking coal as explanatory variables, the four energy price coefficients have the signs predicted by the law of demand. The two price coefficients have a statistically significant effect on adoption of basic oxygen furnaces. The inclusion of energy prices leads to significantly more efficient estimates of other coefficients in the model. 19 refs., 3 tabs.

  7. Use of a new microporous insulation in a sub car at Acme Steel

    SciTech Connect (OSTI)

    Harvey, H.; Gamble, F.C.; MacKenzie, I.B.

    1996-12-31

    Acme Steel Co. is a small integrated steel company headquartered in Riverdale IL., with its blast furnace and coke plant operations located in the city of Chicago. Rail transportation between the two plants is by Conrail with two crews assigned exclusively to Acme. The torpedo cars used for this service are specially reinforced, with 36 in. wheels and additional braking capability for safety on public rail tracks. Over a seven month period, microporous insulating panels 0.28 in. thick in No. 49 sub ladle saved an average 24 degrees in the iron on arrival at the BOF compared to the average for the rest of the fleet. The microporous insulation replaced 0.25 in. of compressed fiber panel.

  8. Sub-surface mechanical damage distributions during grinding of fused silica

    SciTech Connect (OSTI)

    Suratwala, T I; Wong, L L; Miller, P E; Feit, M D; Menapace, J A; Steele, R A; Davis, P A; Walmer, D

    2005-11-28

    The distribution and characteristics of surface cracking (i.e. sub-surface damage or SSD) formed during standard grinding processes has been investigated on fused silica glass. The SSD distributions of the ground surfaces were determined by: (1) creating a shallow (18-108 {micro}m) wedge/taper on the surface by magneto-rheological finishing; (2) exposing the SSD by HF acid etching; and (3) performing image analysis of the observed cracks from optical micrographs taken along the surface taper. The observed surface cracks are characterized as near-surface lateral and deeper trailing indent type fractures (i.e., chatter marks). The SSD depth distributions are typically described by a single exponential distribution followed by an asymptotic cutoff in depth (c{sub max}). The length of the trailing indent is strongly correlated with a given process. Using established fracture indentation relationships, it is shown that only a small fraction of the abrasive particles are being mechanically loaded and causing fracture, and it is likely the larger particles in the abrasive particle size distribution that bear the higher loads. The SSD depth was observed to increase with load and with a small amount of larger contaminant particles. Using a simple brittle fracture model for grinding, the SSD depth distribution has been related to the SSD length distribution to gain insight into ''effective'' size distribution of particles participating in the fracture. Both the average crack length and the surface roughness were found to scale linearly with the maximum SSD depth (c{sub max}). These relationships can serve as useful rules-of-thumb for nondestructively estimating SSD depth and to identify the process that caused the SSD. In certain applications such as high intensity lasers, SSD on the glass optics can serve as a reservoir for minute amounts of impurities that absorb the high intensity laser light and lead to subsequent laser-induced surface damage. Hence a more scientific

  9. Proposal of a novel multifunctional energy system for cogeneration of coke, hydrogen, and power - article no. 052001

    SciTech Connect (OSTI)

    Jin, H.G.; Sun, S.; Han, W.; Gao, L.

    2009-09-15

    This paper proposes a novel multifunctional energy system (MES), which cogenerates coke, hydrogen, and power, through the use of coal and coke oven gas (COG). In this system, a new type of coke oven, firing coal instead of COG as heating resource for coking, is adopted. The COG rich in H{sub 2} is sent to a pressure swing adsorption (PSA) unit to separate about 80% of hydrogen first, and then the PSA purge gas is fed to a combined cycle as fuel. The new system combines the chemical processes and power generation system, along with the integration of chemical conversion and thermal energy utilization. In this manner, both the chemical energy of fuel and thermal energy can be used more effectively. With the same inputs of fuel and the same output of coking heat, the new system can produce about 65% more hydrogen than that of individual systems. As a result, the thermal efficiency of the new system is about 70%, and the exergy efficiency is about 66%. Compared with individual systems, the primary energy saving ratio can reach as high as 12.5%. Based on the graphical exergy analyses, we disclose that the integration of synthetic utilization of COG and coal plays a significant role in decreasing the exergy destruction of the MES system. The promising results obtained may lead to a clean coal technology that will utilize COG and coal more efficiently and economically.

  10. Baotou Iron and Steel Group Baotou Steel | Open Energy Information

    Open Energy Info (EERE)

    search Name: Baotou Iron and Steel Group (Baotou Steel) Place: Baotou, Inner Mongolia Autonomous Region, China Product: Baotou-based iron and steel maker as well as a rare...

  11. Final Scientific Report Steel Foundry Refractory Lining Optimization

    SciTech Connect (OSTI)

    Smith, J.D.; Peaslee, K.D.

    2002-12-02

    The overall objective of the program was to optimize refractory materials and foundry processing used in casting steel. This objective was to be met by completing the following: (1) Surveying the steel foundries both through paper/electronic surveys sent to North American steel foundries as well as plant visits to participants. Information concerning refractory selection and performance as well as refractory and steelmaking practices provides a baseline for future comparison and to identify opportunities for substantial improvement in energy efficiency. (2) Conducting post-mortem analysis of materials from existing refractory/steelmaking practices to determine wear/failure mechanisms. (3) Identify areas for research on developing refractories for use in steel foundry furnaces, adjusting steelmaking practices to improve efficiency and modifying slag practices to improve refractory performance. The overall objective of the steel foundry refractory lining optimization program was to review established refractory and steelmaking practices to identify opportunities for improvements that would yield substantial energy savings for steel foundries. Energy savings were expected to arise from improved efficiency of the electric arc furnaces and from reductions in the post-casting welding and grinding that are normally required. Ancillary energy savings related to a reduction in the amount of refractories currently produced to meet the needs of the steel foundry industry, and a shift from pre-fired materials (shaped refractories) to monolithic refractories that are heat treated ''in situ'' were anticipated. A review of the complete program results indicates that techniques for achieving the overall goal were demonstrated. The main difference between the predicted and the actual achievements relates to the areas from which actual energy savings could be realized. Although reductions in furnace tap temperature would result in a reduction in the power required for melting, such

  12. Vacancy-type defects induced by grinding of Si wafers studied by monoenergetic positron beams

    SciTech Connect (OSTI)

    Uedono, Akira; Yoshihara, Nakaaki; Mizushima, Yoriko; Kim, Youngsuk; Nakamura, Tomoji; Ohba, Takayuki; Oshima, Nagayasu; Suzuki, Ryoichi

    2014-10-07

    Vacancy-type defects introduced by the grinding of Czochralski-grown Si wafers were studied using monoenergetic positron beams. Measurements of Doppler broadening spectra of the annihilation radiation and the lifetime spectra of positrons showed that vacancy-type defects were introduced in the surface region (<98 nm), and the major defect species were identified as (i) relatively small vacancies incorporated in dislocations and (ii) large vacancy clusters. Annealing experiments showed that the defect concentration decreased with increasing annealing temperature in the range between 100 and 500C. After 600700C annealing, the defect-rich region expanded up to about 170 nm, which was attributed to rearrangements of dislocation networks, and a resultant emission of point defects toward the inside of the sample. Above 800C, the stability limit of those vacancies was reached and they started to disappear. After the vacancies were annealed out (900C), oxygen-related defects were the major point defects and they were located at <25 nm.

  13. Success Story: Harrison Steel

    Broader source: Energy.gov [DOE]

    This case study highlights how Harrison Steel leveraged both EPA's ENERGY STAR program and DOE resources to enhance energy efficiency efforts and multiply captured energy savings.

  14. ITP Steel: Steel Industry Marginal Opportunity Study September...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Marginal Opportunity Study September 2005 ITP Steel: Steel Industry Marginal Opportunity Study September 2005 steelmarginalopportunity.pdf (346.86 KB) More Documents & Publications ...

  15. Auto/Steel Partnership: Advanced High-Strength Steel Research...

    Broader source: Energy.gov (indexed) [DOE]

    More Documents & Publications AutoSteel Partnership: AHSS Stamping, Strain Rate Characterization, Sheet Steel Fatigue, AHSS Joining FY 2008 Progress Report for Lightweighting ...

  16. Cracking of simulated oil refinery off-gas over a coal char, petroleum coke, and quartz

    SciTech Connect (OSTI)

    Yuan Zhang; Jin-hu Wu; Dong-ke Zhang

    2008-03-15

    The cracking of oil refinery off-gas, simulated with a gas mixture containing methane (51%), ethylene (21.4%), ethane (21.1%), and propane (6.5%), over a coal char, petroleum coke, and quartz, respectively, has been studied in a fixed bed reactor. The experiments were performed at temperatures between 850 and 1000{sup o}C and at atmospheric pressure. The results show that the conversions of all species considered increased with increasing temperature. Ethane and propane completely decomposed over all three bed materials in the temperature range investigated. However, the higher initial conversion rates of methane and ethylene cracking at all temperatures were observed only over the coal char and not on the petroleum coke and quartz, indicating a significant catalytic effect of the coal char on methane and ethylene cracking. Methane and ethylene conversions decreased with reaction time due to deactivation of the coal char by carbon deposition on the char surface and, in the later stage of a cracking experiment, became negative, suggesting that methane and ethylene had been formed during the cracking of ethane and propane. 16 refs., 13 figs., 2 tabs.

  17. Petroleum Coke

    Gasoline and Diesel Fuel Update (EIA)

    Proved Reserves (Billion Cubic Feet) Pennsylvania Shale Proved Reserves (Billion Cubic Feet) Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9 2000's 96 88 3,790 2010's 10,708 23,581 32,681 44,325 56,210 - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. Release Date: 11/19/2015 Next Release Date: 12/31/2016 Referring Pages: Shale Natural Gas Proved Reserves as of Dec. 31 Pennsylvania Shale Gas

  18. Glass Stronger than Steel

    DOE R&D Accomplishments [OSTI]

    Yarris, Lynn

    2011-03-28

    A new type of damage-tolerant metallic glass, demonstrating a strength and toughness beyond that of steel or any other known material, has been developed and tested by a collaboration of researchers from Berkeley Lab and Caltech.

  19. Development and Testing of the Advanced CHP System Utilizing the Off-Gas from the Innovative Green Coke Calcining Process in Fluidized Bed

    SciTech Connect (OSTI)

    Chudnovsky, Yaroslav; Kozlov, Aleksandr

    2013-08-15

    Green petroleum coke (GPC) is an oil refining byproduct that can be used directly as a solid fuel or as a feedstock for the production of calcined petroleum coke. GPC contains a high amount of volatiles and sulfur. During the calcination process, the GPC is heated to remove the volatiles and sulfur to produce purified calcined coke, which is used in the production of graphite, electrodes, metal carburizers, and other carbon products. Currently, more than 80% of calcined coke is produced in rotary kilns or rotary hearth furnaces. These technologies provide partial heat utilization of the calcined coke to increase efficiency of the calcination process, but they also share some operating disadvantages. However, coke calcination in an electrothermal fluidized bed (EFB) opens up a number of potential benefits for the production enhancement, while reducing the capital and operating costs. The increased usage of heavy crude oil in recent years has resulted in higher sulfur content in green coke produced by oil refinery process, which requires a significant increase in the calcinations temperature and in residence time. The calorific value of the process off-gas is quite substantial and can be effectively utilized as an “opportunity fuel” for combined heat and power (CHP) production to complement the energy demand. Heat recovered from the product cooling can also contribute to the overall economics of the calcination process. Preliminary estimates indicated the decrease in energy consumption by 35-50% as well as a proportional decrease in greenhouse gas emissions. As such, the efficiency improvement of the coke calcinations systems is attracting close attention of the researchers and engineers throughout the world. The developed technology is intended to accomplish the following objectives: - Reduce the energy and carbon intensity of the calcined coke production process. - Increase utilization of opportunity fuels such as industrial waste off-gas from the novel

  20. Dezincing of steel scrap

    SciTech Connect (OSTI)

    Rij, P.W. van; Campenon, B.; Mooij, J.N.

    1997-04-01

    Scrap is an important raw material in the steel industry. Depending on the type of steelmaking process, the composition of the scrap may vary. Market research in Europe shows that there will be a shortage of zinc-free scrap in the future. An alkaline dezincing process for galvanized steel has been developed. A description of a pilot plant based on alkaline dezincing technology is presented.

  1. Profiles in garbage: Steel cans

    SciTech Connect (OSTI)

    Miller, C.

    1998-02-01

    Steel mills are the largest market for steel cans. Integrated mills use the basic oxygen process to manufacture tinplate, appliances, car bodies, and steel framing. Electric arc furnaces use 100% scrap to produce steel shapes such as railroad ties and bridge spans. Electric arc furnaces are more geographically diverse and tend to have smaller capacities than basic oxygen furnaces. Detinners remove the tin from steel cans for resale to tin using industries. With less tin use in steel cans, the importance of the detinning market has declined substantially. Foundries use scrap as a raw material in making castings and molds for industrial users.

  2. ITP Steel: Steel Industry Marginal Opportunity Study September 2005

    Office of Energy Efficiency and Renewable Energy (EERE)

    The objective of this study is to generate a marginal opportunity curve for the ITP steel subprogram showing the location of the current portfolio compared against all opportunities for steel manufacturing.

  3. ITP Steel: Steel Industry Energy Bandwidth Study October 2004

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ... Steel can be hot or cold rolled; with hot rolling, the steel either is reheated or directly charged after casting. Reheating is the major energy consumer in the rolling process. ...

  4. Continuous steel production and apparatus

    DOE Patents [OSTI]

    Peaslee, Kent D.; Peter, Jorg J.; Robertson, David G. C.; Thomas, Brian G.; Zhang, Lifeng

    2009-11-17

    A process for continuous refining of steel via multiple distinct reaction vessels for melting, oxidation, reduction, and refining for delivery of steel continuously to, for example, a tundish of a continuous caster system, and associated apparatus.

  5. Final Report: No{sub x} Emissions from By Product Fuel Combustion in Steel Making, September 15, 1996 - October 15, 1999

    SciTech Connect (OSTI)

    Pershing, David W.; Lighty, JoAnn S.; Eddings, Eric G.; Cacciatore, David A.

    1999-01-28

    Exhaust gases from the primary operations in the steel making process are almost exclusively utilized as supplemental fuels within the steel plant. These by-product fuels include blast furnace gas (BFG) and coke oven gas (COG) which contain mixtures of H{sub 2}, CO, CH{sub 4} and trace amounts of some heavier hydrocarbons and the impurities NH{sub 3} and HCN. These fuels are burned alone or in combination with natural gas to fire the coke ovens, blast furnace stoves utility boilers and metal working furnaces. The utilization of these by-product fuels reduces the waste gas emissions at the steel mill and reduces the requirements for outside fuel sources. However, as with primary fuel sources, the combustion of these by-product fuel blends does produce hazardous pollutants, in particular nitrogen oxides, and because these are atypical fuel blends of varying composition, the pollutant formation is not well understood. The objective of this research was to develop an understanding of the mechanisms controlling NO{sub x} formation from the combustion of by-product fuels from the steel industry and investigate control and design options to minimize emissions. The minimization strategies investigated were constrained by limits on CO and hydrocarbon emissions, both of which increased under fuel-rich combustion scenarios that resulted in reduced NO{sub x} emissions. Also, the minimization strategies were constrained by the need for reasonable heat generation rates in the furnaces that employ these by-product fuels, so that product steel quality is not adversely affected.

  6. Coke oven air and water pollution. (Latest citations from the EI Compendex*Plus database). Published Search

    SciTech Connect (OSTI)

    Not Available

    1994-09-01

    The bibliography contains citations concerning coke oven pollution. Monitoring, sampling, analyzing, transport properties, and control of emissions and effluents are cited in this compilation from worldwide journals. Pollutants described are sulfur dioxide, hydrogen sulfide, ammonia, phenols, benzopyrene, particulates, and other trace elements and compounds. Process and equipment modifications, such as pipeline charging, wet and dry quenching, retrofitting, and oven leakage preventives are included. (Contains a minimum of 200 citations and includes a subject term index and title list.)

  7. ITP Steel: Energy Use in the U.S. Steel Industry: An Historical Perspective

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    and Future Opportunities, September 2000 | Department of Energy Use in the U.S. Steel Industry: An Historical Perspective and Future Opportunities, September 2000 ITP Steel: Energy Use in the U.S. Steel Industry: An Historical Perspective and Future Opportunities, September 2000 steel_energy_use.pdf (431.85 KB) More Documents & Publications ITP Steel: Steel Industry Marginal Opportunity Study September 2005 ITP Steel: Steel Industry Energy Bandwidth Study October 2004 ITP Steel: Energy

  8. Comparative evaluation of rejuvenation of spent residue hydroprocessing catalysts in the decoked (oxide) and coked (sulfided) forms

    SciTech Connect (OSTI)

    Stanislaus, A.; Marafi, M.; Absi-Halabi, M.

    1993-12-31

    Two routes were used to rejuvenate spent residue hydroprocessing catalyst by leaching foulant metals. In the first, the deoiled spent catalyst containing coke and deposited metals in the sulfide form was chemically treated to remove the metal foulants. In the second, the deoiled spent catalyst was decoked by controlled combustion of coke and the resultant coke free catalyst containing the metals in the oxide form was subjected to leaching. Oxalic acid, a chelating agent, that can form soluble metal complexes was used for metal leaching in both routes. The influence of adding an oxidizing agent such as H{sub 2}O{sub 2} to oxalic acid on the leaching efficiency was also examined in both routes. The spent and treated catalysts were characterized and the improvements in surface area pore volume and HDS activity of the catalysts as a result of leaching in different routes compared. The selectivity for leaching of the major metal foulant (vanadium) was better, and activity recovery was higher for the catalyst rejuvenated by metal leaching prior to decoking.

  9. Wrought stainless steels -- Dual marking and corrosion evaluation

    SciTech Connect (OSTI)

    Kobrin, G.; Lilly, J.; MacDiarmid, J.; Moniz, B.

    1999-10-01

    Prior to the 1980s, the commonly used type 300 austenitic series stainless steels (SS) in the chemical process industry were available in two grades: those with regular carbon content (straight grades) and those with extra-low carbon content (L-grades). When welding the straight grades, it was possible to sensitize the base metal adjacent to the weld. The carbon combines with the chromium at the grain boundaries, leaving a zone depleted of chromium, below the minimum required for SS, adjacent to the grain boundaries. Even a relatively mild corrosive environment then is able to selectively attack this region along grain boundaries. The dual-marked grades (types 304/304L and 316/316L) appeared, with the carbon content of an L-grade and the strength of a straight grade. Initially, there was no national code acceptance for dual marked grades. Designers were obliged to use L-grade stress values. To get around this, people were known to grind off the unacceptable part of the dual marking designation and deliver whatever grade was initially specified. ASME International now has formally stated that dual-marked grades may be used at straight grade stresses for all product forms and piping to 1,000 F (540 C).

  10. Steel Market Development Institute Awards "Community Hero" Award...

    Broader source: Energy.gov (indexed) [DOE]

    Steel Market Development Institute Men and Women of Steel Awardees Steel Market Development Institute Men and Women of Steel Awardees At the 2016 North American International Auto ...

  11. Effects of HyperCoal addition on coke strength and thermoplasticity of coal blends

    SciTech Connect (OSTI)

    Toshimasa Takanohashi; Takahiro Shishido; Ikuo Saito

    2008-05-15

    Ashless coal, also known as HyperCoal (HPC), was produced by thermal extraction of three coals of different ranks (Gregory caking coal, Warkworth steam coal, and Pasir subbituminous coal) with 1-methylnaphthalene (1-MN) at 360, 380, and 400{sup o}C. The effects of blending these HPCs into standard coal blends were investigated. Blending HPCs as 5-10% of a standard blend (Kouryusho:Goonyella:K9) enhanced the thermoplasticity over a wide temperature range. For blends made with the Pasir-HPC, produced from a noncaking coal, increasing the extraction temperature from 360 to 400{sup o}C increased the thermoplasticity significantly. Blends containing Warkworth-HPC, produced from a slightly caking coal, had a higher tensile strength than the standard blend in semicoke strength tests. The addition of 10% Pasir-HPC, extracted at 400{sup o}C, increased the tensile strength of the semicokes to the same degree as those made with Gregory-HPC. Furthermore, all HPC blends had a higher tensile strength and smaller weight loss during carbonization. These results suggest that the HPC became integrated into the coke matrix, interacting strongly with the other raw coals. 14 refs., 11 figs., 1 tab.

  12. Role of hydrogen in blast furnaces to improve productivity and decrease coke consumption

    SciTech Connect (OSTI)

    Agarwal, J.C.; Brown, F.C.; Chin, D.L.; Stevens, G.; Clark, R.; Smith, D.

    1995-12-01

    The hydrogen contained in blast furnace gases exerts a variety of physical, thermochemical, and kinetic effects as the gases pass through the various zones. The hydrogen is derived from two sources: (1) the dissociation of moisture in the blast air (ambient and injected with hot blast), and (2) the release from partial combustion of supplemental fuels (including moisture in atomizing water, steam, or transport air, if any). With each atom of oxygen (or carbon), the molar amounts of hydrogen released are more than six times higher for natural gas than for coal, and two times higher for natural gas than for oil. Injection of natural gas in a blast furnace is not a new process. Small amounts of natural gas--about 50--80 lb or 1,100--1,700 SCF/ton of hot metal--have been injected in many of the North American blast furnaces since the early 1960s, with excellent operating results. What is new, however, is a batter understanding of how natural gas reacts in the blast furnace and how natural gas and appropriate quantities of oxygen can be used to increase the driving rate or combustion rate of carbon (coke) in the blast furnace without causing hanging furnace and operating problems. The paper discusses the factors limiting blast furnace productivity and how H{sub 2} and O{sub 2} can increase productivity.

  13. Ferritic steel melt and FLiBe/steel experiment : melting ferritic steel.

    SciTech Connect (OSTI)

    Troncosa, Kenneth P.; Smith, Brandon M.; Tanaka, Tina Joan

    2004-11-01

    In preparation for developing a Z-pinch IFE power plant, the interaction of ferritic steel with the coolant, FLiBe, must be explored. Sandia National Laboratories Fusion Technology Department was asked to drop molten ferritic steel and FLiBe in a vacuum system and determine the gas byproducts and ability to recycle the steel. We tried various methods of resistive heating of ferritic steel using available power supplies and easily obtained heaters. Although we could melt the steel, we could not cause a drop to fall. This report describes the various experiments that were performed and includes some suggestions and materials needed to be successful. Although the steel was easily melted, it was not possible to drip the molten steel into a FLiBe pool Levitation melting of the drop is likely to be more successful.

  14. History of ultrahigh carbon steels

    SciTech Connect (OSTI)

    Wadsworth, J.; Sherby, O.D.

    1997-06-20

    The history and development of ultrahigh carbon steels (i.e., steels containing between 1 and 2.l percent C and now known as UHCS) are described. The early use of steel compositions containing carbon contents above the eutectoid level is found in ancient weapons from around the world. For example, both Damascus and Japanese sword steels are hypereutectoid steels. Their manufacture and processing is of interest in understanding the role of carbon content in the development of modern steels. Although sporadic examples of UHCS compositions are found in steels examined in the early part of this century, it was not until the mid-1970s that the modern study began. This study had its origin in the development of superplastic behavior in steels and the recognition that increasing the carbon content was of importance in developing that property. The compositions that were optimal for superplasticity involved the development of steels that contained higher carbon contents than conventional modern steels. It was discovered, however, that the room temperature properties of these compositions were of interest in their own right. Following this discovery, a period of intense work began on understanding their manufacture, processing, and properties for both superplastic forming and room temperature applications. The development of superplastic cast irons and iron carbides, as well as those of laminated composites containing UHCS, was an important part of this history.

  15. High-performance steels

    SciTech Connect (OSTI)

    Barsom, J.M.

    1996-03-01

    Steel is the material of choice in structures such as storage tanks, gas and oil distribution pipelines, high-rise buildings, and bridges because of its strength, ductility, and fracture toughness, as well as its repairability and recyclability. Furthermore, these properties are continually being improved via advances in steelmaking, casting, rolling, and chemistry. Developments in steelmaking have led to alloys having low sulfur, sulfide shape control, and low hydrogen. They provide reduced chemical segregation, higher fracture toughness, better through-thickness and weld heat-affected zone properties, and lower susceptibility to hydrogen cracking. Processing has moved beyond traditional practices to designed combinations of controlled rolling and cooling known as thermomechanical control processes (TMCP). In fact, chemical composition control and TMCP now enable such precise adjustment of final properties that these alloys are now known as high-performance steels (HPS), engineered materials having properties tailored for specific applications.

  16. High-Alloy Ferritic Steels: Semi-Austenitic Stainless Steels...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    however, have low fracture toughness in high strength conditions and at low (subzero) temperature. ... Stainless Steels 1700 - 3 4.2 Heat treatment These alloys typically employ ...

  17. Stainless Steel Permeability

    SciTech Connect (OSTI)

    Buchenauer, Dean A.; Karnesky, Richard A.

    2015-09-01

    An understanding of the behavior of hydrogen isotopes in materials is critical to predicting tritium transport in structural metals (at high pressure), estimating tritium losses during production (fission environment), and predicting in-vessel inventory for future fusion devices (plasma driven permeation). Current models often assume equilibrium diffusivity and solubility for a class of materials (e.g. stainless steels or aluminum alloys), neglecting trapping effects or, at best, considering a single population of trapping sites. Permeation and trapping studies of the particular castings and forgings enable greater confidence and reduced margins in the models. For FY15, we have continued our investigation of the role of ferrite in permeation for steels of interest to GTS, through measurements of the duplex steel 2507. We also initiated an investigation of the permeability in work hardened materials, to follow up on earlier observations of unusual permeability in a particular region of 304L forgings. Samples were prepared and characterized for ferrite content and coated with palladium to prevent oxidation. Issues with the poor reproducibility of measurements at low permeability were overcome, although the techniques in use are tedious. Funding through TPBAR and GTS were secured for a research grade quadrupole mass spectrometer (QMS) and replacement turbo pumps, which should improve the fidelity and throughput of measurements in FY16.

  18. MECS 2006- Iron and Steel

    Office of Energy Efficiency and Renewable Energy (EERE)

    Manufacturing Energy and Carbon Footprint for Iron and Steel Sector (NAICS 3311, 3312) with Total Energy Input, October 2012 (MECS 2006)

  19. Process for dezincing galvanized steel

    DOE Patents [OSTI]

    Morgan, William A.; Dudek, Frederick J.; Daniels, Edward J.

    1998-01-01

    A process for removing zinc from galvanized steel. The galvanized steel is immersed in an electrolyte containing at least about 15% by weight of sodium or potassium hydroxide and having a temperature of at least about 75.degree. C. and the zinc is galvanically corroded from the surface of the galvanized steel. The material serving as the cathode is principally a material having a standard electrode potential which is intermediate of the standard electrode potentials of zinc and cadmium in the electrochemical series. The corrosion rate may be accelerated by (i) increasing the number density of corrosion sites in the galvanized steel by mechanically abrading or deforming the galvanized steel, (ii) heating the galvanized steel to form an alloy of zinc on the surface of the galvanized steel, (iii) mixing the galvanized steel with a material having a standard electrode potential which is intermediate of the standard electrode potentials of zinc and cadmium in the electrochemical series, or (iv) moving the galvanized steel relative to itself and to the electrolyte while immersed in the electrolyte.

  20. High strength, tough alloy steel

    DOE Patents [OSTI]

    Thomas, Gareth; Rao, Bangaru V. N.

    1979-01-01

    A high strength, tough alloy steel is formed by heating the steel to a temperature in the austenite range (1000.degree.-1100.degree. C.) to form a homogeneous austenite phase and then cooling the steel to form a microstructure of uniformly dispersed dislocated martensite separated by continuous thin boundary films of stabilized retained austenite. The steel includes 0.2-0.35 weight % carbon, at least 1% and preferably 3-4.5% chromium, and at least one other substitutional alloying element, preferably manganese or nickel. The austenite film is stable to subsequent heat treatment as by tempering (below 300.degree. C.) and reforms to a stable film after austenite grain refinement.

  1. Process for dezincing galvanized steel

    DOE Patents [OSTI]

    Morgan, W.A.; Dudek, F.J.; Daniels, E.J.

    1998-07-14

    A process is described for removing zinc from galvanized steel. The galvanized steel is immersed in an electrolyte containing at least about 15% by weight of sodium or potassium hydroxide and having a temperature of at least about 75 C and the zinc is galvanically corroded from the surface of the galvanized steel. The material serving as the cathode is principally a material having a standard electrode potential which is intermediate of the standard electrode potentials of zinc and cadmium in the electrochemical series. The corrosion rate may be accelerated by (1) increasing the number density of corrosion sites in the galvanized steel by mechanically abrading or deforming the galvanized steel, (2) heating the galvanized steel to form an alloy of zinc on the surface of the galvanized steel, (3) mixing the galvanized steel with a material having a standard electrode potential which is intermediate of the standard electrode potentials of zinc and cadmium in the electrochemical series, or (4) moving the galvanized steel relative to itself and to the electrolyte while immersed in the electrolyte. 1 fig.

  2. JFE Steel Corp | Open Energy Information

    Open Energy Info (EERE)

    Corp Jump to: navigation, search Name: JFE Steel Corp Place: Tokyo, Tokyo, Japan Zip: 100-0011 Product: Japanese steel manufacturer; manufactures metallurgical silicon and plans to...

  3. Kobe Steel Ltd Kobelco | Open Energy Information

    Open Energy Info (EERE)

    Jump to: navigation, search Name: Kobe Steel Ltd (Kobelco) Place: Kobe-shi, Hyogo, Japan Zip: 651-8585 Sector: Solar Product: Japanese steel manufacturer; manufactures PV...

  4. Improved Martensitic Steel for High Temperature Applications...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Improved Martensitic Steel for High Temperature Applications A stainless steel composition and heat treatment process for a high-temperature, titanium alloyed 9 Cr-1 molybdenum ...

  5. Mr. Frank Iannizzara Engineering Department Copperweld Steel...

    Office of Legacy Management (LM)

    Frank Iannizzara Engineering Department Copperweld Steel Company 4000 Mahoning Street ... (ORNL) performed a of the Copperweld Steel Company facility in Warren, Ohio. copy of ...

  6. DEVELOPMENT AND DEMONSTRATION OF NOVEL LOW-NOx BURNERS IN THE STEEL INDUSTRY

    SciTech Connect (OSTI)

    Cygan, David

    2006-12-28

    Gas Technology Institute (GTI), together with Hamworthy Peabody Combustion Incorporated (formerly Peabody Engineering Corporation), the University of Utah, and Far West Electrochemical have developed and demonstrated an innovative combustion system suitable for natural gas and coke-oven gas firing within the steel industry. The combustion system is a simple, low-cost, energy-efficient burner that can reduce NOx by more than 75%. The U.S. steel industry needs to address NOx control at its steelmaking facilities. A significant part of NOx emissions comes from gas-fired boilers. In steel plants, byproduct gases – blast furnace gas (BFG) and coke-oven gas (COG) – are widely used together with natural gas to fire furnaces and boilers. In steel plants, natural gas can be fired together with BFG and COG, but, typically, the addition of natural gas raises NOx emissions, which can already be high because of residual fuel-bound nitrogen in COG. The Project Team has applied its expertise in low-NOx burners to lower NOx levels for these applications by combining advanced burner geometry and combustion staging with control strategies tailored to mixtures of natural gas and byproduct fuel gases. These methods reduce all varieties of NOx – thermal NOx produced by high flame temperatures, prompt NOx produced by complex chain reactions involving radical hydrocarbon species and NOx from fuel-bound nitrogen compounds such as ammonia found in COG. The Project Team has expanded GTI’s highly successful low-NOx forced internal recirculation (FIR) burner, previously developed for natural gas-fired boilers, into facilities that utilize BFG and COG. For natural gas firing, these burners have been shown to reduce NOx emissions from typical uncontrolled levels of 80-100 vppm to single-digit levels (9 vppm). This is done without the energy efficiency penalties incurred by alternative NOx control methods, such as external flue gas recirculation (FGR), water injection, and selective non

  7. Dispersion modeling of polycyclic aromatic hydrocarbons from combustion of biomass and fossil fuels and production of coke in Tianjin, China

    SciTech Connect (OSTI)

    Shu Tao; Xinrong Li; Yu Yang; Raymond M. Coveney, Jr.; Xiaoxia Lu; Haitao Chen; Weiran Shen

    2006-08-01

    A USEPA procedure, ISCLT3 (Industrial Source Complex Long-Term), was applied to model the spatial distribution of polycyclic aromatic hydrocarbons (PAHs) emitted from various sources including coal, petroleum, natural gas, and biomass into the atmosphere of Tianjin, China. Benzo(a)pyrene equivalent concentrations (BaPeq) were calculated for risk assessment. Model results were provisionally validated for concentrations and profiles based on the observed data at two monitoring stations. The dominant emission sources in the area were domestic coal combustion, coke production, and biomass burning. Mainly because of the difference in the emission heights, the contributions of various sources to the average concentrations at receptors differ from proportions emitted. The shares of domestic coal increased from {approximately} 43% at the sources to 56% at the receptors, while the contributions of coking industry decreased from {approximately} 23% at the sources to 7% at the receptors. The spatial distributions of gaseous and particulate PAHs were similar, with higher concentrations occurring within urban districts because of domestic coal combustion. With relatively smaller contributions, the other minor sources had limited influences on the overall spatial distribution. The calculated average BaPeq value in air was 2.54 {+-} 2.87 ng/m{sup 3} on an annual basis. Although only 2.3% of the area in Tianjin exceeded the national standard of 10 ng/m{sup 3}, 41% of the entire population lives within this area. 37 refs., 9 figs.

  8. Advanced steel reheat furnace

    SciTech Connect (OSTI)

    Moyeda, D.; Sheldon, M.; Koppang, R.; Lanyi, M.; Li, X.; Eleazer, B.

    1997-10-01

    Energy and Environmental Research Corp. (EER) under a contract from the Department of Energy is pursuing the development and demonstration of an Advanced Steel Reheating Furnace. This paper reports the results of Phase 1, Research, which has evaluated an advanced furnace concept incorporating two proven and commercialized technologies previously applied to other high temperature combustion applications: EER`s gas reburn technology (GR) for post combustion NOx control; and Air Product`s oxy-fuel enrichment air (OEA) for improved flame heat transfer in the heating zones of the furnace. The combined technologies feature greater production throughput with associated furnace efficiency improvements; lowered NOx emissions; and better control over the furnace atmosphere, whether oxidizing or reducing, leading to better control over surface finish.

  9. High-Alloy Ferritic Steels: Martensitic Stainless Steels, Precipitatio...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ... Metall Trans 12A (1981) 2138-2141. 7. LW Tsay, WC Lee, RK Shiue and JK Wu. Notch tensile properties of laser-surface-annealed 17-4 PH stainless steel in hydrogen-related ...

  10. 2169 steel waveform experiments.

    SciTech Connect (OSTI)

    Furnish, Michael David; Alexander, C. Scott; Reinhart, William Dodd; Brown, Justin L.

    2012-11-01

    In support of LLNL efforts to develop multiscale models of a variety of materials, we have performed a set of eight gas gun impact experiments on 2169 steel (21% Cr, 6% Ni, 9% Mn, balance predominantly Fe). These experiments provided carefully controlled shock, reshock and release velocimetry data, with initial shock stresses ranging from 10 to 50 GPa (particle velocities from 0.25 to 1.05 km/s). Both windowed and free-surface measurements were included in this experiment set to increase the utility of the data set, as were samples ranging in thickness from 1 to 5 mm. Target physical phenomena included the elastic/plastic transition (Hugoniot elastic limit), the Hugoniot, any phase transition phenomena, and the release path (windowed and free-surface). The Hugoniot was found to be nearly linear, with no indications of the Fe - phase transition. Releases were non-hysteretic, and relatively consistent between 3- and 5-mm-thick samples (the 3 mm samples giving slightly lower wavespeeds on release). Reshock tests with explosively welded impactors produced clean results; those with glue bonds showed transient releases prior to the arrival of the reshock, reducing their usefulness for deriving strength information. The free-surface samples, which were steps on a single piece of steel, showed lower wavespeeds for thin (1 mm) samples than for thicker (2 or 4 mm) samples. A configuration used for the last three shots allows release information to be determined from these free surface samples. The sample strength appears to increase with stress from ~1 GPa to ~ 3 GPa over this range, consistent with other recent work but about 40% above the Steinberg model.

  11. ITP Steel: Energy Use in the U.S. Steel Industry: An Historical...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Energy Use in the U.S. Steel Industry: An Historical Perspective and Future Opportunities, September 2000 ITP Steel: Energy Use in the U.S. Steel Industry: An Historical ...

  12. Nano-composite stainless steel (Patent) | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    Patent: Nano-composite stainless steel Citation Details In-Document Search Title: Nano-composite stainless steel A composite stainless steel composition is composed essentially of, ...

  13. Auto/Steel Partnership: AHSS Stamping, Strain Rate Characterization...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AHSS Stamping, Strain Rate Characterization, Sheet Steel Fatigue, AHSS Joining AutoSteel ... More Documents & Publications AutoSteel Partnership: Fatigue of AHSS Strain Rate ...

  14. ITP Steel: Hydrogen and Nitrogen Control in Ladle and Casting...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ITP Steel: Hydrogen and Nitrogen Control in Ladle and Casting Operations castingops.pdf (875.11 KB) More Documents & Publications Steel Industry Technology Roadmap ITP Steel: ...

  15. Auto/Steel Partnership: Hydroforming Materials and Lubricant...

    Broader source: Energy.gov (indexed) [DOE]

    FY 2008 Progress Report for Lightweighting Materials - 5. Automotive Metals-Steel FY 2009 Progress Report for Lightweighting Materials - 5. Automotive Metals - Steel AutoSteel ...

  16. Great Lakes Steel -- PCI facility

    SciTech Connect (OSTI)

    Eichinger, F.T.; Dake, S.H.; Wagner, E.D.; Brown, G.S.

    1997-12-31

    This paper discusses the planning, design, and start-up of the 90 tph PCI facility for National Steel`s Great Lakes Steel Division in River Rouge, MI. This project is owned and operated by Edison Energy Services, and was implemented on a fast-track basis by Raytheon Engineers and Constructors, Babcock Material Handling, and Babcock and Wilcox. This paper presents important process issues, basic design criteria, an the challenges of engineering and building a state-of-the-art PCI facility in two existing plants. Pulverized coal is prepared at the River Rouge Power Plant of Detroit Edison, is pneumatically conveyed 6,000 feet to a storage silo at Great Lakes Steel, and is injected into three blast furnaces.

  17. Hydrogen Embrittlement in Pipeline Steels

    Broader source: Energy.gov (indexed) [DOE]

    Division Material Measurement Laboratory Cheaper vs Safe?: Does it have to be choice * Steel is sold by the ton * X80 costs about the same as a X42ton * Use less X80, therefore ...

  18. Electrochemical Dezincing of Steel Scrap

    Office of Energy Efficiency and Renewable Energy (EERE)

    Half of the steel produced in the United States is derived from scrap. With zinc-coated prompt scrap increasing fivefold since 1980, steelmakers are feeling the effect of increased contaminant...

  19. Hydrogen embrittlement of structural steels.

    SciTech Connect (OSTI)

    Somerday, Brian P.

    2010-06-01

    Carbon-manganese steels are candidates for the structural materials in hydrogen gas pipelines, however it is well known that these steels are susceptible to hydrogen embrittlement. Decades of research and industrial experience have established that hydrogen embrittlement compromises the structural integrity of steel components. This experience has also helped identify the failure modes that can operate in hydrogen containment structures. As a result, there are tangible ideas for managing hydrogen embrittement in steels and quantifying safety margins for steel hydrogen containment structures. For example, fatigue crack growth aided by hydrogen embrittlement is a key failure mode for steel hydrogen containment structures subjected to pressure cycling. Applying appropriate structural integrity models coupled with measurement of relevant material properties allows quantification of safety margins against fatigue crack growth in hydrogen containment structures. Furthermore, application of these structural integrity models is aided by the development of micromechanics models, which provide important insights such as the hydrogen distribution near defects in steel structures. The principal objective of this project is to enable application of structural integrity models to steel hydrogen pipelines. The new American Society of Mechanical Engineers (ASME) B31.12 design code for hydrogen pipelines includes a fracture mechanics-based design option, which requires material property inputs such as the threshold for rapid cracking and fatigue crack growth rate under cyclic loading. Thus, one focus of this project is to measure the rapid-cracking thresholds and fatigue crack growth rates of line pipe steels in high-pressure hydrogen gas. These properties must be measured for the base materials but more importantly for the welds, which are likely to be most vulnerable to hydrogen embrittlement. The measured properties can be evaluated by predicting the performance of the pipeline

  20. Development of New Stainless Steel

    SciTech Connect (OSTI)

    Robert F. Buck

    2005-08-30

    A new family of innovative martensitic stainless steels, 521-A, 521-B, and 521-C has been developed by Advanced Steel Technology, LLC (Trafford, PA) as high strength fastener (bolt) materials for use at moderate temperatures in turbine engines, including steam turbines, gas turbines, and aircraft engines. The primary objective of the development program was to create a martensitic stainless steel with high strength at moderate temperatures, and which could replace the expensive nickel-based superalloy IN 718 in some fasteners applications. A secondary objective was to replace conventional 12Cr steels such as AISI 422 used as blades, buckets and shafts that operate at intermediate temperatures in turbine engines with stronger steel. The composition of the new alloys was specifically designed to produce excellent mechanical properties while integrating heat treatment steps into production to reduce energy consumption during manufacturing. As a result, production costs and energy consumption during production of rolled bar products is significantly lower than conventional materials. Successful commercialization of the new alloys would permit the installed cost of certain turbine engines to be reduced without sacrificing high availability or operational flexibility, thereby enhancing the global competitiveness of U.S. turbine engine manufacturers. Moreover, the domestic specialty steel industry would also benefit through increased productivity and reduced operating costs, while increasing their share of the international market for turbine engine fasteners, blades, buckets and shafts.

  1. H-Series Cast Austenitic Stainless Steels

    Broader source: Energy.gov [DOE]

    Cast H-Series austenitic steels are used extensively in several industries for a broad range of high-temperature applications. The H-Series stainless steels have evolved over many years of complex...

  2. Determination of the effect of different additives in coking blends using a combination of in situ high-temperature {sup 1}H NMR and rheometry

    SciTech Connect (OSTI)

    Miguel C. Diaz; Karen M. Steel; Trevor C. Drage; John W. Patrick; Colin E. Snape

    2005-12-01

    High-temperature {sup 1}H NMR and rheometry measurements were carried out on 4:1 wt/wt blends of a medium volatile bituminous coal with two anthracites, two petroleum cokes, charcoal, wood, a low-temperature coke breeze, tyre crumb, and active carbon to determine the effects on fluidity development to identify the parameters responsible for these effects during pyrolysis and to study possible relationships among the parameters derived from these techniques. Positive, negative, and neutral effects were identified on the concentration of fluid material. Small positive effects (ca. 5-6%) were caused by blending the coal with petroleum cokes. Charcoal, wood, and active carbon all exerted negative effects on concentration (18-27% reduction) and mobility (12-25% reduction in T2) of the fluid phase, which have been associated with the inert character and high surface areas of these additives that adsorb the fluid phase of the coal. One of the anthracites and the low-temperature coke breeze caused deleterious effects to a lesser extent on the concentration (7-12%) and mobility (13-17%) of the fluid material, possibly due to the high concentration of metals in these additives (ca. 11% ash). Despite the high fluid character of tyre crumb at the temperature of maximum fluidity of the coal (73%), the mobility of the fluid phase of the blend was lower than expected. The comparison of {sup 1}H NMR and rheometry results indicated that to account for the variations in minimum complex viscosity for all the blends, both the maximum concentration of fluid phase and the maximum mobility of the fluid material had to be considered. For individual blends, two exponential relationships have been found between the complex viscosity and the concentration of solid phase in both the softening and resolidification stages but the parameters are different for each blend. 30 refs., 8 figs., 5 tabs.

  3. ,,,,,,"Coal Components",,,"Coke",,,"Electricity Components",,,,,,,,,,,,,,"Natural Gas Components",,,"Steam Components"

    U.S. Energy Information Administration (EIA) Indexed Site

    Relative Standard Errors for Table 7.1;" " Unit: Percents." ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"Selected Wood and Other Biomass Components" ,,,,,,"Coal Components",,,"Coke",,,"Electricity Components",,,,,,,,,,,,,,"Natural Gas Components",,,"Steam Components" " "," ",,,,,,,,,,,,,"Total",,,,,,,,,,,,,,,,,,,,,,,"Wood Residues",,,," " " "," ","

  4. ITP Steel: Steel Industry Marginal Opportunity Study September 2005

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Steel Industry Marginal Opportunity Study Energetics, Inc. for the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy Industrial Technologies Program September 2005 1 Table of Contents Introduction.....................................................................................................................- 1 - Ore-Based Steelmaking: Bandwidth and Opportunities................................................- 3 - EAF Steelmaking: Bandwidth and

  5. Mechanistic Insights of Ethanol Steam Reforming over Ni–CeO x (111): The Importance of Hydroxyl Groups for Suppressing Coke Formation

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Liu, Zongyuan; Duchoň, Tomáš; Wang, Huanru; Peterson, Erik W.; Zhou, Yinghui; Luo, Si; Zhou, Jing; Matolín, Vladimir; Stacchiola, Dario J.; Rodriguez, José A.; et al

    2015-07-30

    We have studied the reaction of ethanol and water over Ni–CeO2-x(111) model surfaces to elucidate the mechanistic steps associated with the ethanol steam reforming (ESR) reaction. Our results provide insights about the importance of hydroxyl groups to the ESR reaction over Ni-based catalysts. Systematically, we have investigated the reaction of ethanol on Ni–CeO2-x(111) at varying Ce³⁺ concentrations (CeO1.8–2.0) with absence/presence of water using a combination of soft X-ray photoelectron spectroscopy (sXPS) and temperature-programmed desorption (TPD). Consistent with previous reports, upon annealing, metallic Ni formed on reduced ceria while NiO was the main component on fully oxidized ceria. Ni⁰ is themore » active phase leading to both the C–C and C–H cleavage of ethanol but is also responsible for carbon accumulation or coking. We have identified a Ni₃C phase that formed prior to the formation of coke. At temperatures above 600K, the lattice oxygen from ceria and the hydroxyl groups from water interact cooperatively in the removal of coke, likely through a strong metal–support interaction between nickel and ceria that facilitates oxygen transfer.« less

  6. Mechanistic insights of ethanol steam reforming over Ni-CeOx(111): The importance of hydroxyl groups for suppressing coke formation

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Liu, Zongyuan; Senanayake, Sanjaya D.; Duchon, Tomas; Wang, Huanru; Peterson, Erik W.; Zhou, Yinghui; Luo, Si; Zhou, Jing; Matolin, Vladimir; Stacchiola, Dario J.; et al

    2015-07-10

    We have studied the reaction of ethanol and water over NiCeO2-x(111) model surfaces to elucidate the mechanistic steps associated with the ethanol steam reforming (ESR) reaction. Our results provide insights about the importance of hydroxyl groups to the ESR reaction over Ni-based catalysts. Systematically, we have investigated the reaction of ethanol on NiCeO2-x(111) at varying Ce? concentrations (CeO1.82.0) with absence/presence of water using a combination of soft X-ray photoelectron spectroscopy (sXPS) and temperature-programmed desorption (TPD). Consistent with previous reports, upon annealing, metallic Ni formed on reduced ceria while NiO was the main component on fully oxidized ceria. Ni? is themoreactive phase leading to both the CC and CH cleavage of ethanol but is also responsible for carbon accumulation or coking. We have identified a Ni?C phase that formed prior to the formation of coke. At temperatures above 600K, the lattice oxygen from ceria and the hydroxyl groups from water interact cooperatively in the removal of coke, likely through a strong metalsupport interaction between nickel and ceria that facilitates oxygen transfer.less

  7. Mechanistic Insights of Ethanol Steam Reforming over Ni–CeO x (111): The Importance of Hydroxyl Groups for Suppressing Coke Formation

    SciTech Connect (OSTI)

    Liu, Zongyuan; Duchoň, Tomáš; Wang, Huanru; Peterson, Erik W.; Zhou, Yinghui; Luo, Si; Zhou, Jing; Matolín, Vladimir; Stacchiola, Dario J.; Rodriguez, José A.; Senanayake, Sanjaya D.

    2015-07-30

    We have studied the reaction of ethanol and water over Ni–CeO2-x(111) model surfaces to elucidate the mechanistic steps associated with the ethanol steam reforming (ESR) reaction. Our results provide insights about the importance of hydroxyl groups to the ESR reaction over Ni-based catalysts. Systematically, we have investigated the reaction of ethanol on Ni–CeO2-x(111) at varying Ce³⁺ concentrations (CeO1.8–2.0) with absence/presence of water using a combination of soft X-ray photoelectron spectroscopy (sXPS) and temperature-programmed desorption (TPD). Consistent with previous reports, upon annealing, metallic Ni formed on reduced ceria while NiO was the main component on fully oxidized ceria. Ni⁰ is the active phase leading to both the C–C and C–H cleavage of ethanol but is also responsible for carbon accumulation or coking. We have identified a Ni₃C phase that formed prior to the formation of coke. At temperatures above 600K, the lattice oxygen from ceria and the hydroxyl groups from water interact cooperatively in the removal of coke, likely through a strong metal–support interaction between nickel and ceria that facilitates oxygen transfer.

  8. Today`s steel technology

    SciTech Connect (OSTI)

    1996-01-01

    AISI members have made significant advances in steelmaking technology over the past several years. This report details the alloy developments and processes that have made steel an engineered material suitable for an expanding range of applications. Improved processes involve casting, rolling, welding, forging, chemical composition and computerized control. Applications cover a broad range including automobile, buildings and bridges.

  9. Reduction of COD in leachate from a hazardous waste landfill adjacent to a coke-making facility

    SciTech Connect (OSTI)

    Banerjee, K.; O`Toole, T.J.

    1995-12-01

    A hazardous waste landfill adjacent to a coke manufacturing facility was in operation between July 1990 and December 1991. A system was constructed to collect and treat the leachate from the landfill prior to discharge to the river. Occasionally, the discharge from the treatment facility exceeded the permit limitations for Chemical Oxygen Demand (COD), Biochemical Oxygen Demand (BOD), and Total Organic Carbon (TOC). The objectives of this study were to determine treatment methods which would enable compliance with the applicable discharge limits; to establish the desired operating conditions of the process; and to investigate the effect of various parameters such as pH, catalyst dosage, and reaction time on the COD destruction efficiency. The characteristics of the landfill leachate in question were significantly variable in terms of chemical composition. A review of the influent quality data suggests that the COD concentration ranges between 80 and 390 mg/l. The oxidation processes using Fenton`s reagent or a combination of UV/hydrogen peroxide/catalyst are capable of reducing the COD concentration of the leachate below the discharge limitation of 35 mg/l. The estimated capital cost associated with the Fenton`s reagent process is approximately $525,000, and the annual operating and maintenance cost is $560,000. The estimated capital cost for the UV/hydrogen peroxide/catalyst treatment system is $565,000. The annual operating and maintenance cost of this process would be approximately $430,000.

  10. DOE - Office of Legacy Management -- Sutton Steele and Steele Co - TX 09

    Office of Legacy Management (LM)

    Sutton Steele and Steele Co - TX 09 FUSRAP Considered Sites Site: SUTTON, STEELE & STEELE CO. (TX.09) Eliminated from consideration under FUSRAP Designated Name: Not Designated Alternate Name: Sutton, Steele & Steele, Inc. TX.09-1 Location: Dallas , Texas TX.09-1 Evaluation Year: 1993 TX.09-2 Site Operations: Conducted operations to separate Uranium shot by means of air float tables and conducted research to air classify C-Liner and C-Special materials. TX.09-1 TX.09-3 TX.09-4 TX.09-5

  11. Steel project fact sheet: Steel reheating for further processing

    SciTech Connect (OSTI)

    1998-04-01

    Steel reheating is an energy-intensive process requiring uniform temperature distribution within reheating furnaces. Historically, recuperators have ben used to preheat combustion air, thereby conserving energy. More recent innovations include oxygen enrichment and the use of regenerative burners, which provide higher preheat air temperatures than recuperators. These processes have limitations such as equipment deterioration, decreasing energy efficiency over time, high maintenance costs, and increased NO{sub x} emissions with increased air preheat temperature, unless special equipment is used. Praxair, Inc., supplier of oxygen and other industrial gases to the steel industry, proposes to introduce an innovative oxy-fuel burner technology (using 100% oxygen) to the steel reheating industry. Oxy-fuel combustion reduces or eliminates nitrogen in combustion air and substantially reduces waste heat carried out with flue gas. Based on technology currently used in the glass, hazardous waste, and aluminum industries, Praxair has developed and patented low temperature, oxy-fuel burners that can be used in high temperature industrial furnaces where temperature uniformity is critical and extremely low NO{sub x} emissions are desired. The technical goal of the project is to demonstrate the use of oxy-fuel burners in a slab reheat furnace while reducing energy consumption by 45% and NO{sub x} emissions by 90% within the converted furnace zones. Successful implementation of this technology also will eliminate the need to periodically replace recuperators and install NO{sub x} removal equipment.

  12. Automotive frames of stainless steel

    SciTech Connect (OSTI)

    Emmons, J.B.; Douthett, J.

    1996-08-01

    A lightweight, stainless steel vehicle modular frame that meets the requirements of the Partnership for a New Generation of Vehicles (PNGV) is being jointly developed by Armco and Autokinetics. Reaching the long-term goal of the program known as the Supercar will require technology that is capable of significantly reducing mass, while holding the cost of the finished vehicle to current levels. The structure should reduce mass by at least 50%, and must be high in performance, practical to manufacture, and conceptually simple compared to current practice. Another key PNGV goal is the development of a manufacturing infrastructure to attain cost and production levels consistent with auto industry norms. A third goal is to spin off as much of the resulting advanced technology as possible to conventional vehicles, enabling them to benefit from advances in mass reduction, aerodynamics, and materials technologies. All of these benefits can be realized with the stainless steel modular frame.

  13. Steel Industry Energy Bandwidth Study

    SciTech Connect (OSTI)

    none,

    2004-10-01

    ITP conducted a study on energy use and potential savings, or "bandwidth" study, in major steelmaking processes. Intended to provide a realistic estimate of the potential amount of energy that can be saved in an industrial process, the "bandwidth" refers to the difference between the amount of energy that would be consumed in a process using commercially available technology versus the minimum amount of energy needed to achieve those same results based on the 2nd law of thermodynamics. The Steel Industry Energy Bandwidth Study (PDF133 KB) also estimates steel industry energy use in the year 2010, and uses that value as a basis for comparison against the minimum requirements. This energy savings opportunity for 2010 will aid focus on longer term R&D.

  14. Nano-composite stainless steel

    SciTech Connect (OSTI)

    Dehoff, Ryan R.; Blue, Craig A.; Peter, William H.; Chen, Wei; Aprigliano, Louis F.

    2015-07-14

    A composite stainless steel composition is composed essentially of, in terms of wt. % ranges: 25 to 28 Cr; 11 to 13 Ni; 7 to 8 W; 3.5 to 4 Mo; 3 to 3.5 B; 2 to 2.5 Mn; 1 to 1.5 Si; 0.3 to 1.7 C; up to 2 O; balance Fe. The composition has an austenitic matrix phase and a particulate, crystalline dispersed phase.

  15. Steel Industry Marginal Opportunity Analysis

    SciTech Connect (OSTI)

    none,

    2005-09-01

    The Steel Industry Marginal Opportunity Analysis (PDF347 KB) identifies opportunities for developing advanced technologies and estimates both the necessary funding and the potential payoff. This analysis determines what portion of the energy bandwidth can be captured through the adoption of state-of-the-art technology and practices. R&D opportunities for addressing the remainder of the bandwidth are characterized and plotted on a marginal opportunity curve.

  16. Steel: Material for the 21. century

    SciTech Connect (OSTI)

    1996-01-01

    In spite of inroads by a range of competing materials, steel is still the primary structural material because of its outstanding strength, ductility, fracture toughness, repairability, and recyclability. Over the past ten years, advances in steelmaking and processing technologies have enabled the development of a wide range of new steel products with improved properties. For example, combinations of closely controlled chemical composition, rolling practices, and cooling rates now permit the production of steels with enhanced fracture toughness and lower susceptibility to hydrogen cracking.

  17. Korea Iron Steel Co Ltd | Open Energy Information

    Open Energy Info (EERE)

    Steel Co Ltd Jump to: navigation, search Name: Korea Iron & Steel Co Ltd Place: Changwon, South Gyeongsang, Korea (Republic) Zip: 641 370 Product: Korea-based manufacturer of steel...

  18. Tokyo Steel Manufacturing Co Ltd | Open Energy Information

    Open Energy Info (EERE)

    Co Ltd Jump to: navigation, search Name: Tokyo Steel Manufacturing Co, Ltd Place: Japan Zip: 100-0013 Product: Tokyo Steel is involved in the manufacture and sale of steel...

  19. Auto industry steel project to boost efficiency, safety

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Auto industry steel project to boost efficiency, safety Auto industry steel project to boost efficiency, safety Higher-strength, lighter-weight steels could be coming to a car near ...

  20. Iron and Steel (2010 MECS) | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Iron and Steel (2010 MECS) Iron and Steel (2010 MECS) Manufacturing Energy and Carbon Footprint for Iron and Steel Sector (NAICS 3311, 3312) Energy use data source: 2010 EIA MECS (with adjustments) Footprint Last Revised: February 2014 View footprints for other sectors here. Manufacturing Energy and Carbon Footprint Iron and Steel (125.81 KB) More Documents & Publications MECS 2006 - Iron and Steel Manufacturing Energy and Carbon Footprint - Sector: Iron and Steel (NAICS 3311, 3312), October

  1. Improved Processing of High Alloy Steels for Wear Components...

    Office of Scientific and Technical Information (OSTI)

    Steels for Wear Components in Energy Generation Systems, Transportation and ... Title: Improved Processing of High Alloy Steels for Wear Components in Energy Generation ...

  2. Hydrogen Assisted Fracture of Stainless Steels (Technical Report...

    Office of Scientific and Technical Information (OSTI)

    Technical Report: Hydrogen Assisted Fracture of Stainless Steels Citation Details In-Document Search Title: Hydrogen Assisted Fracture of Stainless Steels You are accessing a ...

  3. 2169 steel waveform experiments. (Technical Report) | SciTech...

    Office of Scientific and Technical Information (OSTI)

    Technical Report: 2169 steel waveform experiments. Citation Details In-Document Search Title: 2169 steel waveform experiments. In support of LLNL efforts to develop multiscale ...

  4. Multi-component Cu-Strengthened Steel Welding Simulations: Atom...

    Office of Scientific and Technical Information (OSTI)

    Steel Welding Simulations: Atom Probe Tomography and Synchrotron X-ray Diffraction Analyses Citation Details In-Document Search Title: Multi-component Cu-Strengthened Steel Welding ...

  5. NanoComposite Stainless Steel Powder Technologies (Technical...

    Office of Scientific and Technical Information (OSTI)

    NanoComposite Stainless Steel Powder Technologies Citation Details In-Document Search Title: NanoComposite Stainless Steel Powder Technologies You are accessing a document from ...

  6. Post-Test Metallurgical Evaluation Results for Steel Containment...

    Office of Scientific and Technical Information (OSTI)

    Results for Steel Containment Vessel (SCV) High Pressure Test Citation Details In-Document Search Title: Post-Test Metallurgical Evaluation Results for Steel Containment ...

  7. Largest Producer of Steel Products in the United States Achieves...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Iron on the Mesabi Iron Range in northern Minnesota, the U. S. Steel Minntac plant ... Significant Energy Savings at its Minntac Plant U. S. Steel's Taconite Pellet ...

  8. Post Irradiation Examination of Stainless Steel Cladding from...

    Office of Environmental Management (EM)

    Post Irradiation Examination of Stainless Steel Cladding from In-Reactor Permeation Experiment Post Irradiation Examination of Stainless Steel Cladding from In-Reactor Permeation ...

  9. Corrosion Testing of Carbon Steel in Acid Cleaning Solutions...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Technical Report: Corrosion Testing of Carbon Steel in Acid Cleaning Solutions Citation Details In-Document Search Title: Corrosion Testing of Carbon Steel in Acid Cleaning ...

  10. Steele Hot Springs Pool & Spa Low Temperature Geothermal Facility...

    Open Energy Info (EERE)

    Hot Springs Pool & Spa Low Temperature Geothermal Facility Jump to: navigation, search Name Steele Hot Springs Pool & Spa Low Temperature Geothermal Facility Facility Steele Hot...