Steel and iron with different carbon content is divided into high carbon ferrochrome comprises a charging FeCr (C is equal to or less than 10%), CARBON FeCr (C is equal to or less than 4.0%), LOW CARBON FeCr (C is equal to or less than 0.5%), micro carbon ferrochrome (C is equal to or less than 0.15%). Commonly used and silicon chromium alloy nitride ferrochrome. Chromite mainly used for steelmaking alloying addition agent, used in steelmaking refining later joined. Smelting stainless steel and low carbon steel, it is necessary to use low, micro carbon ferrochromium refining ferrochromium production once get larger development. Due to the steelmaking process improvement, now with AOD method (see the furnace refining) production of stainless steel, carbon ferrochrome (mainly Charging charging FeCr), and there is only in the late low, micro carbon ferrochromium composition is adjusted, so now ferrochrome production key is refining carbon ferrochrome.
Chromium is one of the important strategic materials. It has the characteristics of hard, wear-resistant, high temperature resistance, corrosion resistance and so on.