Domestic ferrosilicon, industrial production status and use
ferrosilicon
Ferrosilicon: ferrosilicon is coke, steel chips, quartz (or silica) as raw materials, smelting made with mineral furnace. Silicon and oxygen combine easily to form silica. Therefore, ferrosilicon is often used in steelmaking as a deoxidizer, and because of the formation of SiO2, a lot of heat is released, and at the same time, it is beneficial to improve the temperature of molten steel. Ferrosilicon is used as an alloying element additive. It is widely used in low-alloy structural steel, bonding steel, spring steel, bearing steel, heat-resistant steel and electrical silicon steel. Ferrosilicon is commonly used as reducing agent in ferroalloy production and chemical industry. Silicon content of 95%-99%. Pure silicon is commonly used to make monocrystalline silicon or non-ferrous metal alloys.
Application: Ferrosilicon is widely used in steel industry, casting industry and other industrial production.
Ferrosilicon is an indispensable deoxidizer in steelmaking industry. In steelmaking, ferrosilicon is used for precipitation deoxidation and diffusion deoxidation. Brick iron is also used as an alloying agent in steelmaking. Adding a certain amount of silicon to steel can significantly improve the strength, hardness and elasticity of steel, improve the permeability of steel, and reduce the hysteresis loss of transformer steel. General steel with silicon 0.15%-0.35%, structural steel with silicon 0.40%-1.75%, tool steel with silicon 0.30%-1.80%, spring steel with silicon 0.40%-2.80%, stainless acid steel with silicon 3.40%-4.00%, heat-resistant steel with silicon 1.00%-3.00%, Silicon steel containing 2% ~ 3% or higher. In the steelmaking industry, each production of a ton of steel consumption about 3 ~ 5kg75% ferrosilicon.
High silicon ferrosilicon or silicon alloys are used as reducing agents in the ferroalloy industry to produce low carbon ferroalloys. Ferrosilicon can be used as inoculant for nodular cast iron, and can prevent the formation of carbide, promote the precipitation and spheroidization of graphite, and improve the properties of cast iron.
In addition, ferrosilicon powder in the mineral processing industry can be used as suspension phase, in the electrode manufacturing industry as electrode paint; High silicon ferrosilicon in the electrical industry can be used to prepare semiconductor pure silicon, in the chemical industry can be used to manufacture silicone.
