Refractories for coal gasification and combustion systems

Technical Report · Tue Jul 01 00:00:00 EDT 1980

DOI:https://doi.org/10.2172/5360793· OSTI ID:5360793

Vojnovich, T.

Information on the state-of-the art of refractories for slagging and nonslagging coal gasification and combustion systems is presented. This information was obtained as part of a program to design refractories for the high temperature erosion/corrosion and slagging conditions found in these systems. Under these conditions the refractories are subject to wear mainly by erosive solids, corrosive gases, or corrosive slags. The conditions leading to wear of the linings are found to be most severe in the slagging gasifiers and combustors; moderately severe in the gas transfer lines and cyclones; and least severe in the fluidized bed reactors based on the experience of pilot and small-scale demonstration plants. Thin refractory linings with substantial water cooling and thick refractory linings with or without water cooling are used in the slagging environments. Silicon carbide and chrome-alumina refractories are the major refractories used in these designs. High purity alumina castable refractories are mostly used for the erosion/corrosion conditions found in fluidized bed reactors, gas transfer lines and cyclones. Fired shapes of alumina or silicon carbide refractories are used instead in gas transfer lines and cyclones where severe wear has been observed. The study indicates the need for improved refractory linings for the slagging and more severe erosion/corrosion environments. Development of improved refractory linings is expected to be useful for gasification systems which may be used by the utilities for the production of electric power in environmentally-clean and cost-effective plants.

• Research Organization: Westinghouse Research and Development Center, Pittsburgh, PA (USA)
• OSTI ID: 5360793
• Report Number(s): EPRI-AP-1268
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
36 MATERIALS SCIENCE
COAL GASIFICATION PLANTS
REFRACTORIES
COMBUSTORS
ALUMINIUM OXIDES
COAL
COAL GASIFICATION
COMBUSTION
CORROSION
EROSION
SILICON CARBIDES
THERMAL SHOCK
ALUMINIUM COMPOUNDS
CARBIDES
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
ENERGY SOURCES
FOSSIL FUELS
FUELS
GASIFICATION
INDUSTRIAL PLANTS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
SILICON COMPOUNDS
THERMOCHEMICAL PROCESSES
010404* - Coal
Lignite
& Peat- Gasification
014000 - Coal
Lignite
& Peat- Combustion
360200 - Ceramics
Cermets
& Refractories