the use of ferro silicon
1. Ferrosilicon is an indispensable deoxidizer in the steelmaking industry. In torch steel, ferrosilicon is used for precipitation deoxidation and diffusion deoxidation.
2. High-silicon ferrosilicon or siliceous alloy is used as a reducing agent for the production of low-carbon ferroalloys in the ferroalloy industry. Ferrosilicon can be used as an inoculant for ductile iron, and can prevent the formation of carbides, promote the precipitation and nodularization of graphite, and improve the properties of cast iron.
3. Ferrosilicon powder can be used as a suspended phase in the mineral processing industry and as a coating for welding rods in the electrode manufacturing industry.
4. Ferrosilicon is often used in the high-temperature smelting process of magnesium metal in the Pijiang method of magnesium smelting, replacing the magnesium in CaO.MgO, and consuming about 1.2 tons of ferrosilicon for every ton of magnesium metal produced, which plays a great role in the production of magnesium metal.
5. Other uses. Finely ground or atomized ferrosilicon powder can be used as a suspended phase in the mineral processing industry. It can be used as a coating for welding rods in the electrode manufacturing industry. High-silicon ferrosilicon can be used in the chemical industry to make products such as silicone.
the features of ferro silicon
Economical: In some application scenarios, the use of ferrosilicon can reduce costs.
Microstructure: Ferrosilicon can reduce white mouth, improve the uniformity of cross-sectional structure, promote the formation of A-type graphite, increase the number of eutectic clusters, and reduce segregation.
Performance improvement: The use of ferrosilicon can improve the strength and toughness of the material.
Relationship between density and silicon content: The density of ferrosilicon increases with the increase of silicon content. This property can be used to quickly determine the amount of silicon in ferrosilicon.
Segregation: Due to the large difference in the density of each phase in ferrosilicon, ferrosilicon alloys are prone to segregation, resulting in the difference between the silicon content of the upper and lower parts of the alloy ingot may exceed 20%. The greater the thickness of the alloy ingot, the longer the solidification time, and the more serious the segregation phenomenon.
Chalking tendency: ferrosilicon with silicon content greater than 33.46% has chalking tendency, especially ferrosilicon with 50%~60% silica has a greater pulverization tendency.
Chemical stability: Ferrosilicon is a chemically stable product.
Deoxidation and alloying: In the steelmaking industry, ferrosilicon is used as a deoxidizer and alloying agent. It has a high chemical affinity with oxygen and is a strong oxygen absorber, which can be used for precipitation and diffusion deoxygenation. In addition, ferrosilicon improves the morphology of inclusions and reduces the gas element content in the molten steel, thereby improving the quality of the steel, reducing costs and saving iron.
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