Knowledge Of Ferrosilicon

(1) Ferrosilicon is used as a deoxidizer and alloying agent in the steel industry. In order to obtain steel with the appropriate chemical composition and to ensure the quality of the steel, deoxidation must be carried out at the final stage of steel smelting. Ferrosilicon is a strong deoxidizer for steelmaking due to the strong chemical affinity of silicon and oxygen and is used for precipitation and diffusion deoxidation. Adding a certain amount of silicon to steel can significantly increase its strength, hardness, and elasticity. Therefore, ferrosilicon is also used as an alloying agent in the smelting of structural steel (contains 0.40-1.75% silicon), tool steel (contains 0.30-1.8% Si), spring steel (contains 0.40-2.8% Si) and silicon steel for transformers (contains 2.81-4.8% Si).
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In addition, in the steel industry, ferrosilicon powder is often used as a heating agent for steel ingot caps to improve the quality and recovery rate of steel ingots by taking advantage of its property of generating a large amount of heat when burning at high temperatures.

(2) Ferrosilicon is used as an inoculant and spheroidizing agent in the iron industry. Cast iron is an important metal material in modern industry. It is cheaper than steel, easy to melt and smelt, has excellent casting properties and much better seismic resistance than steel. This is especially true for ductile iron, its mechanical properties are equal to or close to steel. Adding a certain amount of ferrosilicon to cast iron can prevent the formation of carbides in iron and promote precipitation and spheroidization of graphite. Therefore, ferrosilicon is an important inoculant (helping to precipitate graphite) and a spheroidizing agent in the production of ductile iron.