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Title: Engineering development of advanced physical fine coal cleaning technologies: Froth flotation. Quarterly technical progress report No. 12, July 1, 1991--September 30, 1991

Abstract

The design criteria for each unit operation have been developed based upon a number of variables. These variables, at this time, are based upon the best engineering design information available to industry. A number of assumptions utilized in the design criteria are uncertain. The uncertainties of inert atmospheres for grinding and flotation as well as pyrite depressants were answered by the Surface Control Project. It was determined that inerting was not required and no ``new`` reagents were presented that improved the flotation results. In addition, Tasks 5 and 6 results indicated the required reagent dosage for conventional flotation and advanced flotation. Task 5 results also indicated the need for a clean coal,thickener, the flocculent dosages for both the clean coal and refuse thickeners, and final dewatering requirements. The results from Tasks 5 and 6 and summarized in Task 7 indicate several uncertainties that require continuous long duration testing. The first is the possibility of producing a grab product for both the Pittsburgh and Illinois No. 6 coals in conventional flotation. Second what does long-term recirculation of clarified water do to the product quality? The verification process and real data obtained from Tasks 5 and 6 greatly reduced the capital andmore » operating costs for the process. This was anticipated and the test work indeed provided confirming data.« less

Publication Date:
Research Org.:
ICF Kaiser Engineers, Inc., Pittsburgh, PA (United States); Ohio Dept. of Development, Columbus, OH (United States). Coal Office; Babcock and Wilcox Co., New Orleans, LA (United States); Consolidation Coal Co., Pittsburgh, PA (United States); Center for Research on Sulfur in Coal, Carterville, IL (United States); EIMCO Processed Equipment Co., Salt Lake City, UT (United States); Illinois State Geological Survey, Champaign, IL (United States); Kentucky Energy Cabinet Lab., Lexington, KY (United States); Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10139519
Report Number(s):
DOE/PC/88881-T12
ON: DE93011456
DOE Contract Number:
AC22-88PC88881
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 1991
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; COAL PREPARATION; FLOTATION; COAL FINES; WATER REMOVAL; PROGRESS REPORT; DESULFURIZATION; REAGENTS; CAPITALIZED COST; OPERATING COST; DESIGN; PYRITE; COAL; GRINDING; 010300; 010402; PREPARATION; PURIFICATION AND UPGRADING

Citation Formats

Not Available. Engineering development of advanced physical fine coal cleaning technologies: Froth flotation. Quarterly technical progress report No. 12, July 1, 1991--September 30, 1991. United States: N. p., 1991. Web. doi:10.2172/10139519.
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Not Available. Engineering development of advanced physical fine coal cleaning technologies: Froth flotation. Quarterly technical progress report No. 12, July 1, 1991--September 30, 1991. United States. doi:10.2172/10139519.
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Not Available. Tue . "Engineering development of advanced physical fine coal cleaning technologies: Froth flotation. Quarterly technical progress report No. 12, July 1, 1991--September 30, 1991". United States. doi:10.2172/10139519. https://www.osti.gov/servlets/purl/10139519.
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@article{osti_10139519,
title = {Engineering development of advanced physical fine coal cleaning technologies: Froth flotation. Quarterly technical progress report No. 12, July 1, 1991--September 30, 1991},
author = {Not Available},
abstractNote = {The design criteria for each unit operation have been developed based upon a number of variables. These variables, at this time, are based upon the best engineering design information available to industry. A number of assumptions utilized in the design criteria are uncertain. The uncertainties of inert atmospheres for grinding and flotation as well as pyrite depressants were answered by the Surface Control Project. It was determined that inerting was not required and no ``new`` reagents were presented that improved the flotation results. In addition, Tasks 5 and 6 results indicated the required reagent dosage for conventional flotation and advanced flotation. Task 5 results also indicated the need for a clean coal,thickener, the flocculent dosages for both the clean coal and refuse thickeners, and final dewatering requirements. The results from Tasks 5 and 6 and summarized in Task 7 indicate several uncertainties that require continuous long duration testing. The first is the possibility of producing a grab product for both the Pittsburgh and Illinois No. 6 coals in conventional flotation. Second what does long-term recirculation of clarified water do to the product quality? The verification process and real data obtained from Tasks 5 and 6 greatly reduced the capital and operating costs for the process. This was anticipated and the test work indeed provided confirming data.},
doi = {10.2172/10139519},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Dec 31 00:00:00 EST 1991},
month = {Tue Dec 31 00:00:00 EST 1991}
}
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Technical Report:
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DOI:  10.2172/10139519
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  • A study conducted by Pittsburgh Energy Technology Center of sulfur emissions from about 1,300 United States coal-fired utility boilers indicated that half of the emissions were the result of burning coals having greater than 1.2 pounds of SO{sub 2} per million BTU. This was mainly attributed to the high pyritic sulfur content of the boiler fuel. A significant reduction in SO{sub 2} emissions could be accomplished by removing the pyrite from the coals by advanced physical fine coal cleaning. An engineering development project was prepared to build upon the basic research effort conducted under a solicitation for research into Finemore » Coal Surface Control. The engineering development project is intended to use general plant design knowledge and conceptualize a plant to utilize advanced froth flotation technology to process coal and produce a product having maximum practical pyritic sulfur reduction consistent with maximum practical BTU recovery.« less

  • A study conducted by Pittsburgh Energy Technology Center of sulfur emissions from about 1,300 United States coal-fired utility boilers indicated that half of the emissions were the result of burning coals having greater than 1.2 pounds of SO{sub 2}, per million BTU. This was mainly attributed to the high pyritic sulfur content of the boiler fuel. A significant reduction in SO{sub 2} emissions could be accomplished by removing the pyrite from the coals y advanced physical fine coal cleaning. An engineering development project was prepared to build upon the basic research effort conducted under a solicitation for research into Finemore » Coal Surface Control. The engineering development project is intended to use general plant design knowledge and conceptualize a plant to utilize advanced froth flotation technology to process coal and produce a product having maximum practical pyritic sulfur reduction consistent with maximum practical BTU recovery. This document is a quarterly report which provides a summary of the technical work undertaken during this period. A brief description of the work done prior to this report is also provided.« less

  • A study conducted by Pittsburgh Energy Technology Center of sulfur emissions from about 1,300 United States coal-fired utility boilers indicated that half of the emissions were the result of burning coals having greater than 1.2 pounds of SO{sub 2} per million BTU. This was mainly attributed to the high pyritic sulfur content of the boiler fuel. A significant reduction in SO{sub 2} emissions could be accomplished by removing the pyrite from the coals by advanced physical fine coal cleaning. An engineering development project was prepared to build upon the basic research effort conducted under a solicitation for research into Finemore » Coal Surface Control. The engineering development project is intended to use general plant design knowledge and conceptualize a plant to utilize advanced froth flotation technology to process coal and produce a product having maximum practical pyritic sulfur reduction consistent with maximum practical BTU recovery.« less

  • This document a quarterly report prepared in accordance with the project reporting requirements covering the period from July 1, 1992 to September 30, 1992. This report provides a summary of the technical work undertaken during this period, highlighting the major results. A brief description of the work done prior to this quarter is provided in this report under the task headings. The overall project scope of the engineering development project is to conceptually develop a commercial flowsheet to maximize pyritic sulfur reduction at practical energy recovery values. This is being accomplished by utilizing the basic research data on the surfacemore » properties of coal, mineral matter and pyrite obtained from the Coal Surface Control for Advanced Fine Coal Flotation Project, to develop this conceptual flowsheet. The conceptual flowsheet must be examined to identify critical areas that need additional design data. This data will then be developed using batch and semi-continuous bench scale testing. In addition to actual bench scale testing, other unit operations from other industries processing fine material will be reviewed for potential application and incorporated into the design if appropriate. The conceptual flowsheet will be revised based on the results of the bench scale testing and areas will be identified that need further larger scale design data verification, to prove out the design.« less

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