Materials technology for coal-conversion processes. Progress report, January-March, 1981

Technical Report · Mon Jun 01 00:00:00 EDT 1981

OSTI ID:6288766

Ellingson, W A

Microprobe studies of reaction layers on refractories exposed to a high (20 wt %) iron oxide acidic coal slag suggest that the amount of iron oxide in the reaction layer immediately adjacent to the slag increases significantly as the chromia content in the refractory increases. Waveguides were installed at the SRC pilot plant to monitor erosive wear. Installation of the ANL-designed erosion scanner at the Exxon Coal Liquefaction Pilot Plant was completed. Nondestructive tests of the HYGAS high-pressure cyclone separator showed that the cyclone internal cone has eroded through in some areas. Evaluation of wear of the METC tar-separator cyclones and solids-separator cyclone continued; the addition of B/sub 4/C hardfacing has reduced the wear rate in one of the tar cyclones. Preliminary tests have been conducted on the capability of an electromagnetic acoustic transducer to measure wall thickness. Work on passive acoustic methods to detect leaks in block valves continued. Work continued to evaluate the effect of combustion gas stoichiometry and deposits on the corrosion behavior of air and steam heat-exchanger tubes. Results indicate that high-chromium alloys such as Type 310 stainless steel exhibit a protective Cr oxide layer in the absence of a deposit; however, in the presence of a deposit, the scale characteristics are altered and sulfidation of the substrate material is initiated. This quarter, four sets of failed components (steam-oxygen injection twyers) from the Grand Forks Fixed-bed Slagging Gasifier were received for failure analysis. Metallography and SEM indicate that the cracking was due to thermal fatigue and the holes formed by burning or melting; deposits of a ferromagnetic material containing iron and chromium carbides were observed at the perimeter of the holes. 27 figures, 2 tables. (DLC)

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31-109-ENG-38
• OSTI ID: 6288766
• Report Number(s): ANL-81-30; ON: DE81028474
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL GASIFICATION PLANTS
FAILURES
MATERIALS TESTING
COAL LIQUEFACTION PLANTS
CARBON STEELS
CHROMIUM OXIDES
CHROMIUM-MOLYBDENUM STEELS
CORROSION
CRACKS
EROSION
HYGAS PROCESS
INCOLOY 800
IRON OXIDES
LEAK DETECTORS
PILOT PLANTS
REFRACTORIES
RESEARCH PROGRAMS
SLAGS
SRC PROCESS
STAINLESS STEEL-310
TRANSDUCERS
VALVES
WAVEGUIDES
ALLOYS
CHALCOGENIDES
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM COMPOUNDS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CONTROL EQUIPMENT
CORROSION RESISTANT ALLOYS
EQUIPMENT
FLOW REGULATORS
FUNCTIONAL MODELS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
INCOLOY ALLOYS
INDUSTRIAL PLANTS
IRON ALLOYS
IRON BASE ALLOYS
IRON COMPOUNDS
MATERIALS
NICKEL ALLOYS
OXIDES
OXYGEN COMPOUNDS
SNG PROCESSES
STAINLESS STEELS
STEELS
TESTING
TRANSITION ELEMENT COMPOUNDS
010404* - Coal
Lignite
& Peat- Gasification
010405 - Coal
Lignite
& Peat- Hydrogenation & Liquefaction