Ferroalloy mainly used as an additive steelmaking deoxidizer and alloying elements. Deoxidizer: removal of molten steel in the steel-making process in industrial silicon oxide pellet production plant, but also the removal of certain alloy steel other impurities such as sulfur, nitrogen and the like; an alloy additive: steel composition according to claim alloying element into the steel to improve the properties of steel; inoculant: Before the iron casting industry added to the molten iron silicon ball prices, improved crystal structure of the casting. Ferroalloys: Various ferroalloy and steel according to needs, according to the carbon content of alloying elements or the level of provision many grades of industrial silicon ball, and strictly limited to impurities. Iron alloy containing two or more alloying elements is called composite alloys, the use of such ferroalloy simultaneously deoxygenated or alloying elements, steel-making process beneficial, and can be reasonably economical utilization of associated mineral resources.