Chemical and physical stability of refractories for use in coal gasification. Third quarterly progress report, 1 November 1976--31 January 1977

Technical Report · Tue Feb 15 04:00:00 EST 1977

DOI:https://doi.org/10.2172/7111998· OSTI ID:7111998

Rahman, S. F.; Day, D. E.

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)
• OSTI ID: 7111998
• Report Number(s): COO-2904-3
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
36 MATERIALS SCIENCE
360205 -- Ceramics
Cermets
& Refractories-- Corrosion & Erosion
ALKALINE EARTH METAL COMPOUNDS
ALKANES
ALUMINATES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
ATMOSPHERES
BONDING
BUILDING MATERIALS
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CASTING
CEMENTS
CERAMICS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL GASIFICATION PLANTS
CONTROLLED ATMOSPHERES
CORROSIVE EFFECTS
CRYOGENIC FLUIDS
DENSITY
DIMENSIONS
DISPERSIONS
ELEMENTS
EROSION
FABRICATION
FLEXURAL STRENGTH
FLUIDS
HIGH TEMPERATURE
HYDROCARBONS
HYDROGEN
HYDROGEN COMPOUNDS
INDUSTRIAL PLANTS
JOINING
MATERIALS
MECHANICAL PROPERTIES
MEDIUM PRESSURE
METHANE
MIXTURES
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POROSITY
REFRACTORIES
SILICON COMPOUNDS
SILICON OXIDES
THERMAL INSULATION
TIME DEPENDENCE
VERY HIGH TEMPERATURE
WATER
WEIGHT