Industrial Silicon Polysilicon

Name: China Industrial Silicon Polysilicon Suppliers Manufacturers Factory
Brand: ZhenAn
SKU: 210741408

Industrial silicon, also known as metalloid silicon, is a commodity name that appeared in the mid-1960s. Silicon metal is a product smelted from silica and carbonaceous reducing agent in a submerged arc furnace.

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Description

Raw Material For Industrial Silicon Smelting

Raw material for industrial silicon smelting

The raw materials for smelting industrial silicon mainly include silica and carbonaceous reducing agents. Due to strict restrictions on the content of aluminum, calcium and iron in industrial silicon, the requirements for raw materials are also particularly strict. In silica, SiO2>99.0%, Al2O3<0.3%, Fe2O3<0.15%, CaO<0.2%, MgO<0.15%; particle size is 15-80mm.

The principle of choosing a carbonaceous reducing agent is: high fixed carbon, low ash content, and good chemical activity. Usually low ash petroleum coke or pitch coke is used as reducing agent.

However, due to the low resistivity and poor reactivity of these two cokes, charcoal (or wood blocks) with low ash content, high resistivity and strong reactivity must be used to replace part of the petroleum coke. In order to sinter the charge, some low-ash bituminous coal should also be added. It must be pointed out that using too much or all charcoal will not only increase the product cost, but also make the furnace condition disorder, such as stinging and slumping due to poor sintering of the material surface, it is difficult to form a high-temperature reaction zone, and the furnace bottom is easy to form a SiC layer , Tapping difficulties, etc.

Industrial Silicon Polysilicon4

Main uses of industrial silicon

In the aluminum alloy industry, silicon-aluminum alloys are the most used silicon alloys. Silicon-aluminum alloy is a strong composite deoxidizer, which can improve the utilization rate of deoxidizer when replacing pure aluminum in the steelmaking process, and can purify molten steel and improve steel quality.

Aluminum used in industries such as automobiles has a considerable demand for industrial silicon, so the development of the automobile industry in a region or country has a direct impact on the rise and fall of the industrial silicon market.

Additives for non-ferrous alloys, industrial silicon is also used as an alloying agent for silicon steel with strict requirements, a deoxidizer for smelting special steels and non-ferrous alloys.

In the chemical industry, it is used to produce silicone rubber, silicone resin, silicone oil and other silicones. Silicone rubber has good elasticity and high temperature resistance, and is used to make medical supplies, high temperature resistant gaskets, etc. Silicone resin is used in the production of insulating varnishes, high-temperature coatings, etc. Silicone oil is an oily substance whose viscosity is little affected by temperature. It is used to produce high-grade lubricants, glazing agents, fluid springs, dielectric liquids, etc. It can also be processed into colorless and transparent liquids and sprayed as high-grade waterproofing agents. on the surface of buildings.

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Industrial silicon is purified by a series of processes to produce polysilicon and monocrystalline silicon for use in the photovoltaic industry and the electronics industry. Crystalline silicon cells are mainly used in solar rooftop power stations, commercial power stations and urban power stations with high land costs. They are currently the most mature and widely used solar photovoltaic products, accounting for more than 80% of the world's photovoltaic market. The demand for metal silicon The growth rate is obvious.

Almost all modern large-scale integrated circuits are made of high-purity metalloid silicon, and high-purity metalloid silicon is also the main raw material for the production of optical fibers. It can be said that metalloid silicon has become the basic pillar industry of the information age.