Main uses of ferrosilicon
Ferrosilicon Main uses of ferrosilicon
Ferrosilicon is a ferroalloy silicide.
Ferrosilicon, a ferroalloy, silicide, with is a ferroalloy silicide.
Ferrosilicon, a ferroalloy, silicide, with 15-90% silicon content. The appearance is grey-white with bubble holes fine granular solid particles, many varieties, according to the silicon content, such as FeSi90 (containing 87% ~ 95% Si), FeSi75 (containing 72% ~ 80% Si), FeSi65 (containing 63% ~ 68%), FeSi45 (containing 40% ~ 47% Si), FeSi15Chemicalbook (containing 14% ~ 20% Si), etc. 14% to 20% Si), etc. Impurities such as Al, Ca, S, P, C, Mn, Cr, etc. are additionally specified for different applications. Silicon and iron form Fe3Si, Fe5Si3, FeSi, FeSi2 and other compounds. 75 ferrosilicon (FeSi75) melting temperature range of 1300 ~ 1330 ℃, 45 ferrosilicon (FeSi45) melting temperature range of 1250 ~ 1360 ℃.
Uses of ferrosilicon
1, silicon content in the range of 8.0% to 95.0% of silicon and iron composition of ferroalloys, containing about 50% silicon ferro-silicon, mainly used for cupola melting iron when increasing silicon; containing about 75% silicon ferro-silicon commonly used for cast iron breeding agent and inking agent, steelmaking deoxidizer and silicon materials; silicon and oxygen between the chemical affinity is very Chemicalbook easily synthesized into silicon dioxide, so Ferrosilicon is often used in steelmaking as a deoxidizer (precipitation deoxidation and diffusion deoxidation). At the same time, ferrosilicon can also be used as an alloying element adding agent, widely used in low-alloy structural steel, spring steel, bearing steel, heat-resistant steel and electrical silicon steel, ferrosilicon in the production of ferroalloys and the chemical industry, commonly used as a reducing agent.
2, except for boiling steel and semi-sedimented steel, the content of silicon in steel should be not less than 0.10%. Silicon does not form carbides in steel, but is present in solid solution in ferrite and austenite. Silicon improves the strength of solid solution in steel Chemicalbook and the role of cold working deformation hardening rate is extremely strong, but reduce the toughness and plasticity of steel; the impact of steel hardenability medium, but can improve the tempering stability of steel and oxidation resistance, so ferrosilicon in the steelmaking industry used as an alloying agent.
3，Ferrosilicon, which contains around 90% silicon, is mainly used in the production of low-iron alloys and is also used to produce silicones and highly reactive mineral silicic acid activators; crystalline silicon is used in the production of non-iron-based alloys and high-purity alloys, and is also an important raw material for the electronics industry. Silicon also has properties such as higher specific resistance, poorer thermal conductivity and stronger magnetic conductivity. A certain amount of silicon in steel can improve the permeability of steel Chemicalbook, reduce hysteresis losses and reduce eddy current losses. Electrical steel contains 2% to 3% Si, but requires low titanium and boron content. Cast iron with silicon can prevent the formation of carbide, to promote the precipitation of graphite and spheroidization, magnesium iron silica is a commonly used spheroidizing agent. Ferrosilicon containing barium, zirconium, strontium, bismuth, manganese, rare earths, etc., used as inoculants in the production of cast iron.
4, High ferrosilicon is a reducing agent for the production of low carbon ferroalloys in the ferroalloy industry. Ferrosilicon powder containing about 15% silicon (particle size <0.2mm) is used as a weight enhancer in heavy media beneficiation.
