Silicon iron is commonly used for precipitation or diffusion deoxidation.

Silicon iron is an indispensable deoxidizing agent in the steelmaking industry. It is used for precipitation deoxidation and diffusion deoxidation during steel production. Molding iron is also used as an alloying agent in steelmaking. Adding a certain amount of silicon to steel significantly enhances its strength, hardness, and elasticity, improves its magnetic permeability, and reduces the hysteresis loss of transformer steel. Generally, steel contains 0.15%-0.35% silicon, structural steel contains 0.40%-1.75% silicon, tool steel contains 0.30%-1.80% silicon, spring steel contains 0.40%-2.80% silicon, stainless acid-resistant steel contains 3.40%-4.00% silicon, heat-resistant steel contains 1.00%-3.00% silicon, and silicon steel contains 2%-3% or more silicon. In the steelmaking industry, approximately 3-5kg of 75% silicon iron is consumed for every ton of steel produced.

High-silicon ferrosilicon or silicate alloys are used as reducing agents in the ferrosilicon industry for producing low-carbon ferrosilicon alloys. When added to cast iron, ferrosilicon serves as a孕育剂 for spheroidal graphite cast iron, preventing the formation of carbides and promoting the precipitation and spheroidization of graphite, thereby improving the properties of cast iron.

Moreover, ferrosilicon powder can be used as a suspending phase in the beneficiation industry and as the coating for welding rods in the welding rod manufacturing sector. High-silicon ferrosilicon can be utilized in the electrical industry to produce semiconductor pure silicon, and in the chemical industry, it is used for the manufacture of silicone and similar products. (Excerpted from Baidu Library, please inform for deletion if there is any infringement.)