The main uses of ferrosilicon powder are as follows:
(1) Used as deoxidizer and alloying agent in steelmaking industry.In order to obtain the qualified chemical composition of the steel and ensure the quality of the steel, in the final stage of steelmaking must be deoxidized, silicon and oxygen between the chemical affinity is great, so ferrosilicate is a strong deoxidizing agent used for precipitation and diffusion deoxidization.Adding a certain amount of silicon in the steel can significantly improve the strength, hardness and elasticity of the steel, so in the smelting of structural steel (containing silicon 0.40-1.75%), tool steel (containing Sio.30-1.8%), spring steel (containing Sio.40-2.8%) and transformer silicon steel (containing silicon 2.81-4.8%), ferrosilicon is also used as an alloying agent.
(2) Used as inoculant and spheroidizer in cast iron industry.Cast iron is an important metal material in modern industry. It is cheaper than steel, easy to melt and smelt, and has excellent casting performance and much better aseismic ability than steel.Ductile iron, in particular, has mechanical properties equal to or close to those of steel.Adding a certain amount of ferrosilicon in cast iron can prevent the formation of carbide in iron, promote the precipitation and spheroidization of graphite, so in the production of nodular cast iron, ferrosilicon is an important inoculant (to help the precipitation of graphite) and spheroidizer.
(3) used as reducing agent in ferroalloy production.Not only is the chemical affinity between silicon and oxygen great, but the carbon content of high silicon ferrosilicon is very low.Therefore, high silicon ferrosilicon (or siliceous alloy) is a commonly used reducing agent in the production of low carbon ferroalloy in the ferroalloy industry.
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