Ferro silicon powder is made of coke, steel chips and silica as raw materials, and is refined into ferro silicon alloy in electric furnace, and then formed by special grinding method. Ferro silicon is used more in some low-alloy structural steel, spring steel or bearing steel, etc., and is used as a reducing agent in some chemical industry or ferro alloy production. Ferro silicon powder has uniform particle size, can save a lot of fuel when used, longer burning time, speed up the melting speed, uniform distribution.
In order to obtain the chemical composition of qualified steel and ensure the quality of steel, in the final stage of steelmaking must be deoxidized, the chemical affinity between silicon and oxygen is very large, so ferro silicon is a strong deoxidizer for precipitation and diffusion in steelmaking. Adding a certain amount of silicon to steel can significantly improve the strength, hardness and elasticity of steel, so when smelting structural steel (containing silicon 0.40-1.75%), tool steel (including SiO.30-1.8%), spring steel (including SiO.40-2.8%) and transformer silicon steel (containing silicon 2.81-4.8%), Ferro silicon powder is also used as an alloying agent.
In addition, in the steelmaking industry, the use of ferro silicon powder at high temperature can release a lot of heat, which is often used as ingot cap heating agent to improve the quality and recovery of ingot.
Adding a certain amount of ferro silicon to cast iron can prevent the formation of carbides in iron and promote the precipitation and spheroidization of graphite, so in the production of ductile iron, ferro silicon is an important inoculant (to help precipitate graphite) and spheroidizing agent.
Because cast iron is an important metal material in modern industry, it is cheaper than steel, easy to melt and smelt, has excellent casting performance and much better seismic resistance than steel. In particular, ductile iron, its mechanical properties reach or approach the mechanical properties of steel.
Not only the chemical affinity between silicon and oxygen is very large, but also the carbon content of high-silicon iron silicon is very low. Therefore, high-silicon ferro silicon (or siliceous alloy) is a commonly used reducing agent in the ferro alloy industry when producing low-carbon ferro alloys.
The use of ferro silicon powder in other aspects: the ground or atomized ferro silicon powder can be used as a suspended phase in the mineral processing industry. In the welding rod manufacturing industry can be used as welding rod coating. High silicon iron silicon is used in the chemical industry to make products such as silicone.
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