Mullite (3Al2O3 · 2SiO2) as main crystalline phases of high aluminous refractories. Alumina content between 65%~75%. Mineral composition among mullite, and of lower Alumina also contains small amounts of glass and silica; higher also contains a small amount of alumina corundum. High refractoriness, up to 1790 ℃ or more. Softening starting temperature load 1600~1700℃. Cold crushing strength 70~260MPa. Good thermal shock resistance. Sintering of mullite and fused mullite brick tiles in two ways. Mullite sintered brick with high aluminium from bauxite is the main raw material, adding a small amount of clay/alumina Binder, molding, sintering and manufactured. Fused mullite brick brick with high industrial alumina and alumina, chamotte for raw material, adding fine charcoal or coke as a reducing agent, after being restored by electro-fusion to create. Crystallization of fused mullite sintered mullite, better than sintered products, thermal shock resistance. Their high temperature performance depends largely on the content of alumina and mullite Shi Xiang glass distribution and uniformity. Mainly used in hot blast stove top, BF and bottom, regenerator of glass furnace, ceramics, petroleum cracking system for sintering kiln lining of dead ends, and so on.
