Classification of ferrosilicon

Classification of ferrosilicon:

Ferrosilicon 75, in general, ferrosilicon with a silicon content of 75%, low carbon, phosphorus and sulfur content,

Ferrosilicon 72, usually contains 72% silicon, and the content of carbon, sulfur and phosphorus is in the middle.

Ferrosilicon 65, ferrosilicon with 65% silicon content, relatively high content of carbon, sulfur and phosphorus.

The role of ferrosilicon in steelmaking:

First: It is 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 last stage of steelmaking. The chemical affinity between silicon and oxygen is very high, so ferrosilicon is a strong deoxidizer for steelmaking. Precipitation and diffusion deoxygenation.

Second: It is 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. Adding a certain amount of ferrosilicon to cast iron can prevent iron from Form carbides, promote the precipitation and spheroidization of graphite, so in the production of ductile iron, ferrosilicon is an important inoculant and spheroidizer.

Third: It is 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 is a reducing agent commonly used in the production of low-carbon ferroalloys in the ferroalloy industry.

Fourth: The main use of ferrosilicon natural lumps is as an alloying agent in steel production. He can improve the hardness, strength, and corrosion resistance of steel, and can also improve the weldability and machinability of steel.

Fifth: Uses in other areas. Finely ground or atomized ferrosilicon powder can be used as a suspension phase in the mineral processing industry.