Why should the content of silica be controlled in chromite raw materials?

Improve the quality stability of ferrochromium and reduce the corrosion and wear of equipment.

1, silica is one of the common impurities in ferrochrome, and high content of silica will have a negative impact on the quality and performance of ferrochrome. Controlling the silicon dioxide content in ferrochrome raw materials can improve the quality stability of ferrochrome.

2. At high temperature, silicon dioxide will react with chromium in ferrochrome under certain conditions to produce calcium silicate with high melting point, thus affecting the smelting process. This reaction will lead to the increase of corrosion and wear of lining materials, increase the maintenance cost of equipment and adversely affect the stability of smelting process. Controlling the silicon dioxide content in chromite raw materials can reduce equipment corrosion and wear.