2023-06-20
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What is metallic silicon Metal silicon, also known as crystalline silicon or industrial silicon, is mainly used as an additive for non-ferrous alloys. Silicon is a non-metallic element, gray in color, metallic in color, hard and brittle in nature. The content of silicon accounts for approximately 26% of the crustal mass; The relative atomic mass is 28.80; The density is 2.339/cm3; The melting point is 1410. C; Boiling point is 2355 ℃; The resistivity is 214012 · m According to the content of iron, aluminum, and calcium in metal silicon, it can be divided into different grades such as 553, 441, 411, 421, 3303, 3305, 2202, 2502, 1501, 1101, etc The additional products of metal silicon include silicon powder, edge silicon, black silicon, metal silicon slag, etc. Silicon micro powder, also known as silicon powder, micro silicon powder, or silica fume, is widely used in the refractory and concrete industries Silicon metal (Si) is an industrial purified elemental silicon mainly used for producing silicon, producing high-purity semiconductor materials, and preparing alloys with special applications. In the refractory industry, it is mainly used as an antioxidant. The main applications of metal silicon in industry are as follows
(1) Production of silicone rubber, silicone resin, silicone oil, etc.
Silicone rubber has good elasticity and high temperature resistance, and is used for making medical supplies, high-temperature gaskets, etc.
Silicone resin is used in the production of insulation coatings, high-temperature coatings, etc Silicone oil is an oily substance whose viscosity is less affected by temperature. It is used in the production of lubricants, polishes, fluid springs, dielectric liquids, etc. It can also be processed into colorless and transparent liquids, which can be sprayed on building surfaces as waterproof agents(2) Manufacturing high-purity semiconductors
Modern large-scale integrated circuits are almost all made of high-purity metal silicon, and high-purity metal silicon is still the main raw material for producing optical fibers. It can be said that metal silicon has become the fundamental pillar industry of the information age.
(3) Preparation of alloy
Silicon aluminum alloy is a large amount of silicon alloy. Silicon aluminum alloy is a strong composite Oxygen scavenger. Replacing pure aluminum in steelmaking can improve the utilization rate of Oxygen scavenger, purify molten steel and improve steel quality. Silicon aluminum alloy has low density, low coefficient of thermal expansion, good casting and wear resistance. The alloy castings cast with it have high impact resistance and good high-pressure compactness, which can greatly improve their service life. It is commonly used in the production of aerospace and automotive components Silicon copper alloy has good welding performance and is less prone to sparks when subjected to impact. It has explosion-proof function and can be used to make storage tanks Adding silicon to steel to make silicon steel sheets can greatly improve its magnetic conductivity, reduce hysteresis and eddy current losses, and can be used to manufacture iron cores for transformers and motors, thereby improving their performance With the development of science and technology, the application field of metallic silicon will further expand. The main production areas of metallic silicon include Yunnan, Sichuan, Guizhou, Guangxi in the southwest region, Hunan and Hubei in central China, Fujian in eastern China, Heihe and Linjiang areas in Heilongjiang, Jilin and Liaoning in the northeast region, and Inner Mongolia
