Ferrosilicon Application

Ferrosilicon is widely used in steel industry, foundry industry and other industrial production.

Ferrosilicon is an essential deoxidizer in the steelmaking industry. In torch steel, ferrosilicon is used for precipitation deoxidation and diffusion deoxidation. Brick iron is also used in steelmaking as an alloying agent. Adding a certain amount of silicon to the steel can significantly improve the strength, hardness and elasticity of the steel, improve the magnetic permeability of the steel, and reduce the hysteresis loss of the 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 0.40%-2.80% silicon Silicon is 3.40% to 4.00%, and heat-resistant steel contains 1.00% to 3.00% of silicon, and silicon steel contains 2% to 3% or more of silicon.

High-silicon ferrosilicon or siliceous alloys are used in the ferroalloy industry as reducing agents for the production of low-carbon ferroalloys. Ferrosilicon can be used as an inoculant for ductile iron when added to cast iron, and can prevent the formation of carbides, promote the precipitation and spheroidization of graphite, and improve the performance of cast iron.

In addition, ferrosilicon powder can be used as a suspended phase in the mineral processing industry, and can be used as a coating for welding rods in the welding rod manufacturing industry; high-silicon ferrosilicon can be used to prepare semiconductor pure silicon in the electrical industry, and can be used in the chemical industry to make silicones, etc.

In the steelmaking industry, about 3 to 5kg of 75% ferrosilicon is consumed per ton of steel produced.

Melting point: 75FeSi is 1300℃

Ferrosilicon contains a small amount of phosphorus metal compounds, such as calcium phosphide, etc. When transported by vehicles or stored in warehouses, if wet, phosphine can be released to poison the people in or around the warehouse. Severe phosphine poisoning can cause death.