Mullite insulation brick is a kind of high quality refractory materials widely used in infant industry, it has the characteristics of expansion uniformity, excellent thermal shock resistance, high load softening point, small high temperature creep value, large hardness, good resistance to chemical corrosion, etc. The classification of mullite insulation brick: According to different density, mullite insulation brick is mainly divided into light and the heavy mullite brick, depending on the use temperature mainly divides into: 1350 mullite brick, 1450 mullite brick, 1550 mullite brick, etc.
Performance and application of mullite insulation brick: high refractoriness, can reach more than 1790 ℃.The rul start temperature is 1600 ~ 1700 ℃. Room temperature compressive strength is 70 ~ 260 MPa. Thermal shock resistance is good. Divided into sintered mullite brick and fused mullite brick. Sintered mullite brick with high bauxite clinker as the main raw material, add a small amount of clay or raw bauxite as binder, through forming, sintering and made. Fused mullite brick with high alumina, alumina industry and refractory clay as raw material, add charcoal or coke fine stuff as a reducing agent, adopt fused reducing method to manufacture after forming. The crystallization of fused mullite is bigger than sintered mullite, thermal shock resistance is better than sintered products.Their high temperature performance mainly depends on the content of alumina and the uniformity of mullite phase and glass distribution. It is mainly used for hot blast stove top, blast furnace and furnace bottom, the regenerator of glass furnace, ceramic sintering kiln, petroleum cracking system corner lining, etc.
The characteristics of Mullite insulation brick
1. Green environmental protection, non-toxic, non-corrosive, safe to use。
2. Excellent foaming property, foam expansion can reach more than 30 times。
3. Foam is independent, is not easy to form a connecting hole, the preparation of get closed-cell foam concrete rate is high, thus has good heat preservation and waterproof effect.