Materials technology for coal-conversion processes. Sixteenth quarterly report, October--December 1978
Refractories for slag containment, nondestructive evaluation methods, corrosion, erosion, and component failures were studied. Analysis of coal slags reveal ferritic contents of 18 to 61%, suggesting a partial pressure of 0/sub 2/ in the slagging zone of approx. 10/sup -2/ to 10/sup -4/ Pa. A second field test of the high-temperature ultrasonic erosion-monitoring system was completed. Ultrasonic inspecton of the HYGAS cyclone separator shows a reduced erosive-wear rate at 5000 h in the stellite region. The acoustic leak-detection system for valves was field tested using a 150-mm-dia. valve with a range of pressures from 0.34 to 4.05 MPa. Results suggest a linear relation between detected rms levels and leak rates. Studies on acoustic emissions from refractory concrete continued with further development of a real-time data acquisition system. Corrosion studies were conducted on Incoloy 800, Type 310 stainless steel, Inconel 671 and U.S. Steel Alloy 18-18-2 (as-received, thermally aged, and preexposed for 3.6 Ms to multicomponent gas mixtures). Results suggest a decrease in ultimate tensile strength and flow stress after preexposure. Examination of commercial iron- and nickel-base alloys after 100-h exposures in atmospheric-pressure fluidized-bed combustors suggests that the addition of 0.3 mole % CaCl/sub 2/ to the fluidized bed has no effect on the corrosion behavior of these materials; however, 0.5 mole % NaCl increased the corrosion rate of all materials. Failure-analysis activities included (1) the design and assembly of thermowells (Haynes Alloy 188 and slurry-coated Type 310 stainless steel) and (2) examination of components from the Synthane boiler explosion, the IGT Steam--Iron Pilot Plant, the HYGAS Ash Agglomerating Gasifier, and the Westinghouse Coal Gasification PDU.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-31-109-ENG-38
- OSTI ID:
- 6279767
- Report Number(s):
- ANL-79-23
- Country of Publication:
- United States
- Language:
- English
Similar Records
Materials technology for coal-conversion processes. Fifteenth quarterly report, July--September 1978
Matrials technology for coal-conversion processes. Progress report, April-June 1980
Related Subjects
36 MATERIALS SCIENCE
CYCLONE SEPARATORS
EROSION
INCOLOY 800
CORROSION
INCONEL 671
IRON BASE ALLOYS
NICKEL BASE ALLOYS
REFRACTORIES
EVALUATION
SLAGS
CHEMICAL COMPOSITION
STAINLESS STEEL-310
STEELS
VALVES
ACOUSTIC EMISSION TESTING
LEAKS
COAL GASIFICATION PLANTS
FAILURE MODE ANALYSIS
FLUIDIZED-BED COMBUSTORS
LEAK DETECTORS
NONDESTRUCTIVE TESTING
ULTRASONIC TESTING
ACOUSTIC TESTING
ALLOYS
BURNERS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
COMBUSTORS
CONCENTRATORS
CONTROL EQUIPMENT
CORROSION RESISTANT ALLOYS
EQUIPMENT
FLOW REGULATORS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
INCOLOY ALLOYS
INDUSTRIAL PLANTS
INERTIAL SEPARATORS
IRON ALLOYS
MATERIALS
MATERIALS TESTING
NICKEL ALLOYS
POLLUTION CONTROL EQUIPMENT
STAINLESS STEELS
SYSTEM FAILURE ANALYSIS
SYSTEMS ANALYSIS
TESTING
010404* - Coal
Lignite
& Peat- Gasification
010405 - Coal
Lignite
& Peat- Hydrogenation & Liquefaction
360105 - Metals & Alloys- Corrosion & Erosion
360205 - Ceramics
Cermets
& Refractories- Corrosion & Erosion