Classification of mullite insulation brick:

Mullite insulation bricks are mainly divided into light and heavy mullite bricks according to the density, and are divided into: 1350 mullite insulation bricks, 1450 mullite insulation
Brick, 1550 mullite brick, etc.
 
Mullite insulation brick performance and application: high fire resistance, up to 1790 ° C. The load softening start temperature is 1600 ~ 1700 ° C. Compressive strength at room temperature 70 ~ 260MPa. Good thermal shock resistance. There are two types of sintered mullite bricks and fused mullite bricks. Sintered mullite bricks use high alumina bauxite clinker as the main raw material, add a small amount of clay or raw alumina as a binder.
Made by molding and firing.
 
The fused mullite brick is made of high alumina, I-alumina and refractory clay, and is added with charcoal or coke fine particles as a reducing agent. After molding, it is manufactured by reduction electrofusion method.
 
The fused mullite crystals are larger than the sintered mullite and have better thermal shock resistance than the sintered products. Their high temperature performance is mainly determined by the alumina content and the uniformity of the mullite phase and glass distribution.
 
Mainly used in hot blast stove top, blast furnace body and bottom, glass melting furnace heat storage chamber, ceramic sintering kiln, dead angle lining of petroleum cracking system, etc.