Metallic silicon block is mainly used as an additive for non-ferrous alloys. It is a non-metallic element, gray and metallic in color, hard and brittle. The content of silicon accounts for about 26% of the mass of the crust; the relative atomic mass is 28.8. The density is 2.33g/cm3. The melting point is 1410°C, the boiling point is 2355°C, and the resistivity is 2140Ω·m.
Silicon Metal 2202 3303 Factory
According to the content of iron, aluminum, and calcium in the metallic silicon block, metallic silicon can be divided into different grades such as 553, 441, 411, 421, 3303, 3305, 2202, 2502, 1501, 1101, and so on.
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Industrially, silicon blocks are usually produced by reducing silica with carbon in an electric furnace. Chemical reaction equation: SiO22C→Si2CO The purity of silicon obtained in this way is 97~98%, called metallic silicon. It is then melted and recrystallized, and impurities are removed with acid to obtain metallic silicon with a purity of 99.7 to 99.8%. The silicon block is mainly composed of silicon and therefore has similar properties to silicon. There are two allotropes, amorphous and crystalline. Amorphous is a gray-black powder, which is a kind of microcrystalline.
Silicon Metal 441 2202 Factory
Silicon block is industrially purified elemental silicon, mainly used for the production of organic silicon, the preparation of high-purity semiconductor materials, and the preparation of special-purpose alloys. Mainly used as an antioxidant in the refractory industry. The main industrial applications of metallic silicon are as follows:
Silicon Metal 3303 2202 Factory
Silicon Metal 2202 3303 Factory
(1) Production of silicone rubber, silicone resin, silicone oil and other silicones
It has good elasticity and high-temperature resistance and is used in the manufacture of medical supplies, high-temperature-resistant gaskets, etc. Silicone resin is used to produce insulating paint, high-temperature resistant coatings, etc. Silicone oil is an oily substance whose viscosity is less affected by temperature. It produces lubricants, polishes, fluid springs, dielectric fluids, etc. It can also be processed into colorless and transparent liquids and sprayed on buildings as waterproofing agents—object surface.
Silicon Metal 441 2502 Factory
Silicon Metal 2502 441 Factory
(2) Manufacturing high-purity semiconductors from silicon blocks
Nearly all modern large-scale integrated circuits are made of high-purity metallic silicon, and high-purity silicon blocks are also the main raw material for the production of optical fibers. It can be said that it has become a basic pillar industry in the information age.
Silicon Metal 2502 3303 Factory
(3)Alloy preparation
Silicon block aluminum alloy is an alloy containing a large amount of silicon. Silicon-aluminum alloy is a strong composite deoxidizer. It can replace pure aluminum in the steelmaking process, improve the utilization rate of deoxidizer, purify molten steel, and improve the quality of molten steel. The alloy has low density, a small thermal expansion coefficient, good casting performance, and wear resistance. The alloy castings cast with it have high impact resistance and good high-pressure density, which can greatly extend the service life. Commonly used in manufacturing aerospace vehicles and the automotive industry.
Chemical silicon production is carried out continuously. The conditions inside the furnace are not permanent either. Chemical silicon production is a process in which electrical energy is converted into thermal energy in an electric furnace, and then the thermal energy is used to directly heat materials to produce chemical reactions. Therefore, the electrical characteristics in the furnace are very important. Melting implements closed arc operation to maintain the high temperature of the furnace, improve thermal efficiency, and improve electric furnace utilization.