Refractory Technology
Zircon refractories have

High spalling resistance
High RUL (1600°C) and refractoriness (> 2000°C)
Low co-efficient of expansion
All of these

ANSWER DOWNLOAD EXAMIANS APP

Refractory Technology
Magnesite chrome refractories

Have very low thermal co-efficient of expansion
Have very low (50 kg/cm² ) cold crushing strength (C.C.S.), and can not be used in metalcase form
Have better spalling resistance than chrome magnesite refractories
Are not at all resistant to the corrosive action of iron oxide

ANSWER DOWNLOAD EXAMIANS APP