Ferrosilicon is an essential deoxidizer in steelmaking industry. In steelmaking, ferrosilicon is used for precipitation deoxidation and diffusion deoxidation.

High silicon ferrosilicon or siliceous alloys are used in the ferroalloy industry as reducing agents for the production of low carbon ferroalloys. Adding ferrosilicon into cast iron can be used as inoculant of nodular cast iron, which can prevent the formation of carbide, promote the precipitation and spheroidization of graphite, and improve the performance of cast iron.
Adding a certain amount of silicon to steel can significantly improve the strength, hardness and elasticity of steel, improve the permeability of steel and reduce the hysteresis loss of transformer steel.

Ferrosilicon powder can be used as a suspended phase in the mineral processing industry and as the coating of electrode in the electrode manufacturing industry.