Calcium Silicate Board for heat preservation is a White , free of asbestos hard new insulation, material with light, high strength, low thermal conductivity , high temperature resistance, corrosion resistance, easy cutting, good durability, energy saving and etc. this material is widely used in petrochemical, refinery, steel, construction, glass, tile and ceramic porcelain industries. Its thickness is usually above 30 mm, density is 200 ~400 kg/ m3 and working temperature is up to 1100° C.White Fused Alumina is produced by fusion of high purity Bayer processed alumina. In electric arc furnaces at a temperature of about 2,050 degrees Celsius. White fused alumina is widely used as a raw material in refractories, ceramics shapes, grinding wheels, sandpaper, blasting media, metal preparation, laminate, coatings, lapping, polishing, grinding and hundreds of other applications.