Microsilicon powder is the industrial dust of ferrosilicon or metallic silicon produced by recovery. Since the production of ferrosilicon or metallic silicon is used in an electric furnace with high temperature, the volatile silicon is oxidized into silica in the air, forming tiny particles (0.14um) in the air, which are recovered by dust removal equipment to make micro-silicon powder products (commonly known as silica fume). Micro-silicon powder is mainly used in cement or concrete material to improve the performance of cement or concrete, and it is used to prepare special concrete with ultra-high resistance to wear, erosion, corrosion, permeability, frost resistance and early strength. It is widely used in DAMS, large reservoirs, hydropower stations, seaports, railway Bridges, highways and other projects.