ferrosilicon for steel making

Ferroalloys refers to alloys composed of one or more metal or non-metal elements with iron. ferro silicon is an alloy of silicon and iron. It is generally acknowledged that ferrosilicon is an important raw material for steelmaking and casting. Ferrosilicon for steel making can improve the physical and chemical properties and mechanical properties of steel and castings, and improve the quality of steel and castings. Ferro silicon products, as important raw materials for steel and other metallurgical industries, play an important role in modern economic development. The steelmaking, foundry, and ferroalloy industries are the largest markets for ferrosilicon, and they consume more than 90% of ferrosilicon each year.



The production steps of ferrosilicon are based on coke, steel filings, quartz (or silica) as raw materials, and smelting in an electric furnace. In the traditional refining of ferrosilicon, silicon is reduced from silica containing SiO2. Most of the smelting of ferrosilicon uses metallurgical coke as a reducing agent, and steel filings are regulators of ferrosilicon. In fact, the reaction mechanism of ferrosilicon is very complicated. Although the reduction mechanisms proposed by the researchers are not exactly the same, there are several points that are undoubtedly recognized, that is, the intermediate products silicon carbide and silicon monoxide are produced during the smelting process, and The formation and decomposition of silicon carbide and silicon monoxide play an important role in the entire reduction process of silicon dioxide. Ferrosilicon is often used in steelmaking as a deoxidizer. In steelmaking, ferrosilicon is used for precipitation and diffusion deoxidation. Ferrosilicon is also used as an alloying agent in steelmaking. Adding a certain amount of silicon to the steel can significantly improve the strength, hardness and elasticity of the steel, increase the magnetic permeability of the steel, and reduce the hysteresis loss of the transformer steel. At the same time, because SiO2 generates a lot of heat, it is also beneficial to raise the temperature of molten steel while deoxidizing. Ferrosilicon can also be used as an alloying element additive. It is widely used in low-alloy structural steels, bonded steels, spring steels, bearing steels, heat-resistant steels, and electrical silicon steels. In addition, ferrosilicon is often used as a reducing agent in the production of ferroalloys and the chemical industry. Agent.

In addition, ferrosilicon can also be used as an inoculant to improve the properties of nodular cast iron, used as a suspended phase in the beneficiation industry, and ferrosilicon powder can be used in solder production.