Ferrosilicon is an essential deoxidizer in steelmaking industry. In torch steel, ferrosilicon is used for precipitation deoxidation and diffusion deoxidation. Brick iron is also used as an alloying agent in steelmaking. Adding a certain amount of silicon to the steel can significantly improve the strength, hardness and elasticity of the steel, improve the permeability of the steel, and reduce the hysteresis loss of the transformer steel. General steel contains silicon 0.15%-0.35%, structural steel contains silicon 0.40%-1.75%, tool steel contains silicon 0.30%-1.80%, spring steel contains silicon 0.40%-2.80%, stainless acid-resistant steel contains silicon 3.40%-4.00%, heat-resistant steel contains silicon 1.00% ~ 3.00%, stainless steel contains silicon 3.40%-4.00%. Silicon steel contains 2% to 3% or more silicon.
High silicon ferrosilicon or siliceous alloys are used in the ferroalloy industry as reducing agents for the production of low carbon ferroalloys. The addition of ferrosilicon to cast iron can be used as the inoculating agent of ductile iron, and can prevent the formation of carbide, promote the precipitation and spheroidization of graphite, and improve the performance of cast iron.
