(1) Ferrosilicon Uses in Steelmaking Industry. In order to obtain steel with qualified chemical composition and ensure the quality of steel, deoxidation must be carried out in the later stages of steelmaking. The chemical affinity between silicon and oxygen is very large, so ferro silicon is a strong deoxidizer for steelmaking for precipitation and diffusion. deoxidation. Adding a certain amount of silicon to steel can significantly improve the strength, hardness and elasticity of the steel. Therefore, it is widely used in smelting structural steel (containing 0.40-1.75% silicon), tool steel (containing SiO.30-1.8%), Ferrosilicon is also used as an alloying agent in spring steel (containing SiO. 40-2.8%) and silicon steel for transformers (containing 2.81-4.8% silicon). In addition, in the steelmaking 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 the fact that ferrosilicon powder can release a large amount of heat when burned at high temperatures.
(2) Application as Inoculant and Spheroidizing Agent in Cast 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 is much better than steel in vibration resistance. Especially ductile iron, its mechanical properties are equal to or close to those of steel. Mechanical behavior. Adding a certain amount of ferrosilicon to cast iron can prevent the formation of carbides in the iron and promote the precipitation and spheroidization of graphite. Therefore, in the production of ductile iron, ferrosilicon is an important inoculant (helping to precipitate graphite) and spheroidizing agent.
(3) Utilization as a Reducing Agent in Ferroalloy Production. Not only is the chemical affinity between silicon and oxygen very high, but the carbon content of high-silicon ferrosilicon is very low. Therefore, high-silicon ferrosilicon (or silicon alloy) is a commonly used reducing agent in the ferroalloy industry when producing low-carbon ferroalloys.
(4) Other Applications of Ferrosilicon Uses. Ground or atomized ferrosilicon powder can be used as a suspended phase in the mineral processing industry. It can be used as a coating for welding rods in the welding rod manufacturing industry. High-silicon ferrosilicon is used in the chemical industry to make products such as silicone.
