Behaviour of coal slag during gasification

Journal Article · Thu Dec 01 04:00:00 EST 1983 · Am. Ceram. Soc. Bull.; (United States)

OSTI ID:6649387

Bakker, W T

Coal slag and refractory samples from an entrained slagging gasification process development unit were examined by microscope. Rapid wear of 90% Al/sub 2/O/sub 3/ - 10% Cr/sub 2/O/sub 3/ refractories was caused mainly by dissolution of the refractory matrix and removal of large Al/sub 2/O/sub 3/ grains. Unfired refractories were especially susceptible to this wear mechanism. Alumina grains dissolved in the slag, which resulted in the precipitation of dendritic hercynite during cooling. Reduction of FeO in the slag resulted in the precipitation of mullite crystals. Both mechanisms are believed to increase the apparent viscosity of the slag which can adversely affect slag tapping.

• OSTI ID: 6649387
• Journal Information: Am. Ceram. Soc. Bull.; (United States), Journal Name: Am. Ceram. Soc. Bull.; (United States) Vol. 62:12; ISSN ACSBA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBONACEOUS MATERIALS
CATALYTIC EFFECTS
CHALCOGENIDES
CHROMIUM COMPOUNDS
CHROMIUM OXIDES
COAL
COAL GASIFICATION
COAL GASIFICATION PLANTS
ENERGY SOURCES
ENTRAINMENT
FOSSIL FUELS
FUELS
FUNCTIONAL MODELS
GAS GENERATORS
GASIFICATION
INDUSTRIAL PLANTS
IRON COMPOUNDS
IRON OXIDES
MATERIALS
MECHANICAL PROPERTIES
MICROSCOPY
OPTICAL MICROSCOPY
OXIDES
OXYGEN COMPOUNDS
PROCESS DEVELOPMENT UNITS
REFRACTORIES
SLAGS
TESTING
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
VISCOSITY
WEAR
WEAR RESISTANCE