Silicon Metal 2202

Silicon metal is silver gray or dark gray powder with metallic luster, which be of high melting point, good heat resistance, high resistivity and superior oxidation resistance, which is an essential basic raw material in hi-tech industry. The classification of silicon metal is usually classified according to the content of iron, aluminum and calcium contained in the silicon metal components. According to the content of iron, aluminum and calcium in silicon metal, silicon metal can be divided into 553 441 411 421 3303 3305 2202 2502 1501 1101 and other different brands.

In industry, silicon metal is usually made by carbon reduction of silicon dioxide in the electric furnace chemical reaction equation: SiO2 + 2C Si + 2CO so that the purity of silicon metal is 97~98%, called silicon metal and then melt it after recrystallization, with acid to remove impurities, the purity of silicon metal is 99.7~99.8%.