(1) Used as deoxidation agent and alloy agent in steelmaking industry. In order to obtain the chemical composition of qualified steel and ensure the quality of steel, in the final stage of steelmaking must be deoxidation, the chemical affinity between silicon and oxygen is very large, so ferrosilicon is a stronger deoxidation agent for precipitation and diffusion deoxidation. Add a certain amount of silicon to the steel it can obviously improve the strength,Calcium Silicon Alloy hardness and elasticity of steel, thus, when smelting structural steels (including silicon 0.40-1.75%), tool steels (including Sio. 30-1.8%), spring steel (including Sio 40-2.8%) and silicon Steel for transformers (including Silicon 2.81-4.8%), The Ferrosilicon is also used as an alloy agent.
In addition, in the steelmaking industry, the use of Calcium Silicon Alloy in the high-temperature combustion can emit a lot of heat this feature, often as a steel cap heating agent used to improve the quality and recovery of ingot.
(2) used as Inoculant and pelletizing agent in the cast iron industry. Cast iron is an important metal material in modern industry, it is cheaper than steel, melting smelting easily, has excellent casting performance and much better than steel, especially ductile iron, its mechanical properties reach or close to the mechanical properties of steel. The addition of a certain amount of ferrosilicon in cast iron can prevent the formation of carbides in iron, promote the precipitation and spheroidal graphite, so in nodular cast iron, Ferrosilicon is an important inoculant (helping to precipitate graphite) and a spherical chemical agent.
(3) used as reducing agent in iron. Not only is there a strong chemical affinity between silicon and oxygen, but the carbon content of high silicon ferrosilicon is very low. Therefore, high silicon ferrosilicon (or silicon alloy) is a kind of reducing agent used in ferroalloy industry when producing Low-carbon Ferroalloy.
(4) Other uses. The Calcium Silicon Alloy, which has been milled or atomized, can be used as suspension phase in the mineral processing industry. In the welding rod manufacturing can be used as a coating electrode. High silicon ferrosilicon can be used in the chemical industry to make products such as silicone.
In these uses, steelmaking industry, foundry industry and Ferroalloy industry are the largest users of Ferrosilicon. They consume about 90% of the ferrosilicon. In the various grades of Ferrosilicon, the current application of the most widely is 75% ferrosilicon. In the steelmaking industry, each production of 1t steel consumes 3-5kg75% ferrosilicon.