Mullite Castable

Lightweight mullite castable is a new type of material using porous mullite as aggregate. The aggregate is artificially synthesized at high temperature, with the main crystal phase reaching more than 70%, and its composition is uniform and stable. The binding agent is made of pure calcium aluminate cement or aluminate cement, mixed with mullite powder, alumina powder, silica powder, kyanite, etc.

The raw materials of aluminum-magnesium castables for ladles are basically the same as aluminum-magnesium refractory ramming materials. In order to obtain room temperature strength, sodium fluorosilicate should be added as a coagulant. The load softening temperature of ladle aluminum-magnesium castable is lower, which is due to the combination of some low-baking substances formed by adding magnesia powder and the interaction between water glass and sodium fluorosilicate.