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Corundum Castable

Corundum castable is mainly made from corundum aggregate, corundum powder and some adhesives. Compared with high alumina and mullite refractory castables, corundum castable has higher mechanical strength and resistance of erosion and abrasion, but a little lower thermal shock resistance.

Physical and Chemical Indicators

Corundum Castable
PerformanceItemIndicators
Chemical composition after calcination(%)SiO29.5-14.0
Al2O385.0-95.0
Alkalis<0.4
CaO<0.4
Fe2O3<0.4
TiO2<0.4
 Physical propertiesAP(%)14-17
BD(g/cm3)2.8-2.93
CCS (Mpa) 816℃   1400℃ 46.5-57.4  
96.1-113.0
Applied limit temperature(℃)1790
Linear change on reheating (%)-0.1 ~ 0.1
Water content(%)0
Note: The above data are obtained under ideal laboratory conditions. The actual results in application may be varied according to different tests and installation methods.
Application

Corundum castable is mainly applied in lining materials in boiler, blast furnace, hot blast furnace, heating furnace, ceramic furnace and other kinds of furnace. Glass furnace is mainly used in high temperature environment, such as flame space, brick hook, small furnace structure, end wall and so on.

Characteristics

The castable has good abrasive resistance and mechanical strength, little pollution to glass products and good plasticity during construction.

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