1. Used as a deoxidizer and alloying agent in the steelmaking industry: In order to obtain steel with qualified chemical composition and ensure the quality of steel, deoxidation must be carried out in the later stage of steelmaking. The chemical affinity between silicon and oxygen is very large, so Ferrosilicon is a strong deoxidizer for steelmaking and used for precipitation and diffusion deoxidation.
2. Used as inoculant and spheroidizer in cast iron industry: cast iron is an important metal material in modern industry. It is cheaper than steel, easy to melt and smelt, has good casting performance and much better shock resistance than steel . Especially for ductile iron, its mechanical properties are at or close to those of steel. Adding a certain amount of ferrosilicon to cast iron can prevent the formation of carbides in iron and promote the precipitation and spheroidization of graphite. Therefore, in the production of ductile iron, ferrosilicon is an important inoculant (to help precipitate graphite) and nodularizer .
