use of ferro silicon

 1)use of ferro silicon

Used as deoxidizer and alloy agent in steelmaking industry.In order to obtain the steel with qualified chemical composition and ensure the quality of steel, deoxidization must be carried out in the last stage of steelmaking. Silicon and oxygen have a great chemical affinity, so ferrosilicon is a strong deoxidizer used for precipitation and diffusion deoxidization in steelmaking.Adding a certain amount of silicon to steel can significantly improve the strength, hardness and elasticity of steel, so ferrosilicon is also used as alloy agent in smelting structural steel (containing 0.40-1.75% silicon), tool steel (containing SiO.30-1.8%), spring steel (containing SiO.40-2.8% silicon) and transformer silicon steel (containing Silicon 2.81-4.8%).At the same time, improving the shape of inclusions and reducing the content of gas elements in molten steel is an effective new technology to improve steel quality, reduce cost and save iron.It is especially suitable for deoxidation of continuous casting molten steel. It has been proved in practice that ferrosilicon not only meets the requirements of deoxidation in steelmaking, but also has the advantages of desulfurization and high ratio and strong penetrating power.In addition, in the steel industry, ferrosilicon powder can give off a lot of heat at high temperature, which is often used as the ingot cap heating agent to improve the quality and recovery of ingot.

(2)use of ferro silicon

Used as an inoculant and spheroidizer in the cast iron industry.Cast iron is an important metal material in modern industry. It is cheaper than steel and easy to be melted and smelted. It has excellent casting performance and much better seismic capability than steel.In particular, ductile iron has mechanical properties equal to or close to those of steel.Adding a certain amount of ferrosilicon to cast iron can prevent the formation of carbide in iron and promote the precipitation and spheroidization of graphite. Therefore, ferrosilicon is an important inoculant (to help the precipitation of graphite) and spheroidizing agent in the production of nodular cast iron.

(3)use of ferro silicon

Used as reducing agent in ferroalloy production.Not only the chemical affinity between silicon and oxygen is great, but also the high silicon iron has low carbon content.Therefore, high silicon ferrosilicon (or silicon alloy) is a kind of reducing agent commonly used in the production of low carbon ferroalloy in ferroalloy industry.

(4)use of ferro silicon

ferrosilicon75 is often used in the high temperature smelting process of metal magnesium in The Pijiang process. The magnesium in CaO.MgO is replaced. Every ton of metal magnesium consumes about 1.2 tons of ferrosilicon, which plays a great role in the production of metal magnesium.

(5) use of ferro silicon

Other USES.The finely ground or atomized ferrosilicon powder can be used as suspension phase in ore dressing industry.It can be used as coating in welding rod manufacturing industry.High silicon iron is used in the chemical industry to make products such as silicone.

Among these USES, the steelmaking industry, the casting industry and the ferroalloy industry are the largest users of ferrosilicon.Together, they consume more than 90 percent of ferrosilicon.Of the various grades of ferrosilicon, the most widely used is 75% ferrosilicon.In the steelmaking industry, about 3-5kg75% of ferrosilicon is consumed for every 1t of steel produced.