Ferrosilicon products can be used in iron and steel smelting, casting, other ferroalloys, chemical industry and other industries. The composition of ferrosilicon used in different countries varies greatly. Due to technical reasons, the consumption of ferrosilicon per ton of crude steel in my country is relatively large, and more than 90% Ferrosilicon is used in the steel casting process, especially in the smelting process of crude steel. In countries with relatively developed steel technology, such as the United States and Japan, the proportion of ferrosilicon used in steel and casting has declined, but it still remains at about 80%. The use of ferrosilicon in other industries such as chemical industry is increasing.
Ferrosilicon is mainly used in the following four aspects:
(1) Used as a deoxidizer and alloying agent in the steelmaking industry. In order to obtain steel with qualified chemical composition and ensure the quality of steel, deoxidation must be carried out in the final stage of steelmaking. The chemical affinity between silicon and oxygen is very high, so ferrosilicon 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 steel, so it is used in smelting structural steel (containing 0.40-1.75% silicon), tool steel (containing SiO.30-1.8%), When spring steel (containing SiO.40-2.8%) and silicon steel for transformer (containing 2.8-4.8%) are used, it is also used as an alloying agent. In addition, in the steelmaking industry, about 3~5kg75% ferrosilicon is consumed for every ton of steel produced. Utilizing the feature that ferrosiliconpowder can release a lot of heat when it is burned at high temperature, it is often used as a heating agent for steel ingot caps to improve the quality and recovery rate of steel ingots.
(2) Used as an inoculant and nodulizer in the 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 performance and much better shock-absorbing ability than steel, especially ductile iron, whose mechanical properties are at or close to those of steel. Mechanical behavior. Adding a certain amount of ferrosilicon to cast iron can prevent the formation of carbides in iron and promote the precipitation and spheroidization of graphite. Therefore, in the production of ductile iron, ferro silico is an important inoculant (to help precipitate graphite) and nodularizer .
(3) Used as a reducing agent in the production of ferroalloys. Not only the chemical affinity between silicon and oxygen is great, but also the carbon content of high silicon ferrosilicon is very low. Therefore, high-silicon ferrosilicon (or silicon alloy) is a reducing agent commonly used in the production of low-carbon ferroalloys in the ferroalloy industry.
(4) Other uses. Finely ground or atomized ferrosilicon powder can be used as a suspension phase in the mineral processing industry. In the welding rod manufacturing industry, it can be used as a coating for welding rods. High silicon ferrosilicon in the chemical industry, It can be used in the manufacture of silicone and other products in the industry.
Among these uses, the steelmaking industry, foundry industry and ferroalloy industry are the largest users of ferrosilicon. They consume more than 90% of ferrosilicon in total. In various grades of ferrosilicon,the most widely used is 75% ferrosilicon. In the steelmaking industry, about 3-5kg 75% silicon is consumed per 1 ton of steel produced. Anyang Lishi Industrial Co., Ltd. can provide high-quality of ferrosilicon 72-75% grade, especially with advanced technical support for the requirements of low aluminum and low carbon ferro silicon. Follow us to learn more about the market conditions of ferroalloys.