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Introduction To Ferrosilicon

Date: Nov 16th, 2023
Since silicon and oxygen are easily synthesized into silicon dioxide, ferrosilicon is often used as a deoxidizer in steelmaking.

At the same time, since a large amount of heat is released when SiO2 is generated, it is also beneficial to increase the temperature of molten steel while deoxidizing. At the same time, ferrosilicon can also be used as an alloying element additive, which is widely used in low-alloy structural steel, spring steel, bearing steel, heat-resistant steel and electrical silicon steel. Ferrosilicon is often used as a reducing agent in ferroalloy production and chemical industry.

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.