A. Coke ovens regenerator
B. Outer lining of L.D. converter
C. Hearth bottom of blast furnace
D. Coke oven walls
A. Muffle furnace
B. Zinc smelting furnace
C. Ceramic recuperators
D. All A., B. and C.
A. Low co-efficient of expansion
B. High RUL (1600°C) and refractoriness (> 2000°C)
C. High spalling resistance
D. All A., B. and C.
A. Fireclay
B. Silicon carbide
C. Corundum
D. Siliceous fireclay
A. 20°
B. 40°
C. 60°
D. 80°
A. Have better spalling resistance than chrome magnesite refractories
B. Have very low thermal co-efficient of expansion
C. Are not at all resistant to the corrosive action of iron oxide
D. Have very low (50 kg/cm2) cold crushing strength (C.C.S.), and cannot be used in metalcase
form
A. Superduty fireclay
B. Silica
C. Chromite
D. None of these