Chemical and physical stability of refractories for use in coal gasification. Third quarterly progress report, 1 November 1976--31 January 1977
Eleven calcium aluminate cement-bonded refractory castables designated as high alumina, intermediate alumina, and Insulating; three dense high alumina phosphate-bonded ramming mixes; five calcium aluminate cements; and three foam-in-place insulating refractories are being investigated by exposure at 500 to 1000 psi and 500 to 1000/sup 0/F to an atmosphere containing CO-18 percent, CO/sub 2/-12 percent, H/sub 2/-24 percent, H/sub 2/O-41 percent, CH/sub 4/-5 percent. Results show that the modulus of rupture (MOR) of the high alumina castables exposed to 1000 psia at 1000/sup 0/F for 10 days is only about one half of that at 500 psia and 500/sup 0/F. The MOR of the high alumina castables after exposure (ERDA atmosphere) at 500/sup 0/F is higher than that of the as-fired in air at 500/sup 0/F. The MOR of the high alumina exposed castables at 1000/sup 0/F is significantly lower than that of the as-fired in air in 1000/sup 0/F. The MOR of the intermediate alumina and insulating castables remain generally constant during exposures at either 1000 or 500 psia. The change in the MOR of phosphate-bonded specimens is much less than in the cement-bonded high alumina specimens. No significant change in the MOR of Green Pak 90-P and 90 Ram HS ramming mixes occurred during exposures at either 500 or 1000 psia. If all the refractory products used in this investigation are compared, no significant difference between the commercial products of the intermediate alumina and insulating refractories is apparent. On the other hand, a significant difference in strength is observed for the various commercial dense high alumina and to some extent, for the phosphate-bonded high alumina products.
- Research Organization:
- Missouri Univ., Rolla (USA)
- DOE Contract Number:
- EY-76-S-02-2904
- OSTI ID:
- 7111998
- Report Number(s):
- COO-2904-3
- Country of Publication:
- United States
- Language:
- English
Similar Records
Chemical and physical stability of refractories for use in coal gasification. Fourteenth quarterly progress report, August 1, 1979-October 31, 1979
Chemical and physical stability of refractories for use in coal gasification. Thirteenth quarterly progress report, May 1-July 31, 1979
Related Subjects
36 MATERIALS SCIENCE
COAL GASIFICATION PLANTS
FLEXURAL STRENGTH
MATERIALS
CALCIUM COMPOUNDS
CARBON DIOXIDE
CORROSIVE EFFECTS
CARBON MONOXIDE
HYDROGEN
METHANE
WATER
ALUMINATES
ALUMINIUM OXIDES
SILICON OXIDES
BONDING
CASTING
CEMENTS
CERAMICS
CHEMICAL REACTIONS
CONTROLLED ATMOSPHERES
DENSITY
DIMENSIONS
EROSION
HIGH TEMPERATURE
MEDIUM PRESSURE
MIXTURES
POROSITY
REFRACTORIES
THERMAL INSULATION
TIME DEPENDENCE
VERY HIGH TEMPERATURE
WEIGHT
ALKALINE EARTH METAL COMPOUNDS
ALKANES
ALUMINIUM COMPOUNDS
ATMOSPHERES
BUILDING MATERIALS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CRYOGENIC FLUIDS
DISPERSIONS
ELEMENTS
FABRICATION
FLUIDS
HYDROCARBONS
HYDROGEN COMPOUNDS
INDUSTRIAL PLANTS
JOINING
MECHANICAL PROPERTIES
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SILICON COMPOUNDS
010404* - Coal
Lignite
& Peat- Gasification
360205 - Ceramics
Cermets
& Refractories- Corrosion & Erosion