Ferrosilicon is widely used in steel industry, casting industry and other industrial production.
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 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 transformer steel. General steel contains 0.15% - 0.35% silicon, structural steel contains 0.40% - 1.75% silicon, tool steel contains 0.30% - 1.80% silicon, spring steel contains 0.40% - 2.80% silicon, stainless acid resistant steel contains 3.40% - 4.00% silicon, heat resistant steel contains 1.00% - 3.00% silicon, and silicon steel contains 2% - 3% silicon or higher.
High silicon ferrosilicon or silicon alloy is used as reducing agent for the production of low-carbon ferroalloy in ferroalloy industry. Adding ferrosilicon into cast iron can be used as inoculant for nodular cast iron, prevent the formation of carbide, promote the precipitation and spheroidization of graphite and improve the properties of cast iron.
In addition, ferrosilicon powder can be used as suspended phase in beneficiation industry and as coating for electrode in electrode manufacturing industry; High silicon ferrosilicon can be used to prepare semiconductor pure silicon in electrical industry and silicone in chemical industry.
In the steelmaking industry, about 3 ~ 5kg 75% ferrosilicon is consumed for each ton of steel.
