Micro-silica powder is mainly used as high performance refractory castable, prefabricated parts, ladle material, breathable brick, gravity type refractory castable and dry and wet spray material.In the field of high temperature ceramics, such as: oxide combined with silicon carbide products, high temperature calcium silicate lightweight thermal insulation material, electromagnetic corundum mullite brick kiln push board, high temperature resistant materials and products, corundum and ceramic products, the acetate combination products, such as the use of micro silicon powder has high liquidity, low storage capacity, high density and high strength etc.