Corundum mullite sagger belongs to the field of refractory technology, followed by ingredients, molding and firing, from the fused mullite, corundum corundum, alumina powder, silicon powder, calcium aluminate cement and sodium hexametaphosphate ingredients, Using self-flow casting molding method, mold drying after high temperature firing obtained. The corundum mullite saddle made of high temperature, thermal shock stability, long service life. Corundum mullite sag is widely used in special ceramics, electronic ceramics, functional ceramics, heat treatment, IF forging furnace, metal forging, piezoelectric ceramics, electrical ceramics, metal ceramics, magnetic materials, rare earth phosphor, long afterglow powder Lithium carbonate positive and negative grade materials, lithium cobalt oxide, cobalt oxide, strontium carbonate, lithium iron phosphate, chemical powder, nano iron oxide, barium carbonate powder, zirconia powder, electronic ultra pure powder inorganic New material field.