What is silicon carbide material?
Silicon carbide, an inorganic material with the chemical formula SiC, is made from quartz sand, petroleum coke (or coal coke), wood chips (salt is added to produce green silicon carbide) and other raw materials smelted at high temperatures in resistance furnaces. Silicon carbide also exists in nature as a rare mineral, moissanite. In C, N, B and other non-oxide high technology refractory raw materials, silicon carbide for the most widely used, the most economical one, can be called gold steel sand or refractory sand. Chinese industrial production of silicon carbide is divided into two kinds of black silicon carbide and green silicon carbide, are hexagonal crystals, specific gravity of 3.20 ~ 3.25.
The performance and use of silicon carbide
It is mainly used to make grinding wheels, sandpaper, abrasive belts, oil stones, grinding blocks, grinding heads, abrasive pastes and grinding and polishing of single crystal silicon, polycrystalline silicon and piezoelectric crystals in the photovoltaic industry.
It can be used as a deoxidizer for steel making and an improver for cast iron organization, and can be used as a raw material for manufacturing silicon tetrachloride, which is the main raw material for silicone resin industry. Silicon carbide deoxidizer is a new type of strong compound deoxidizer, replacing the traditional silicon powder toner for deoxidation, and the original process compared to the physical and chemical properties are more stable, good deoxidation effect, so that the deoxidation time is shortened, save energy, improve the efficiency of steelmaking, improve the quality of steel, reduce the consumption of raw and auxiliary materials, reduce environmental pollution, improve labor conditions, improve the overall economic benefits of electric furnaces are of great value.
“Three Resistant” Materials
The use of silicon carbide has corrosion resistance, high temperature resistance, high strength, good thermal conductivity, impact resistance and other characteristics, silicon carbide can be used for a variety of smelting furnace lining, high-temperature kiln components, silicon carbide plate, liner, support parts, sagger, silicon carbide crucible, etc..
On the other hand, it can be used for high temperature indirect heating materials in non-ferrous metal smelting industry, such as vertical tank distillation furnace, distillation furnace tower plate, aluminum electrolytic tank, copper melting furnace lining, zinc powder furnace with arc plate, thermocouple protection tube, etc.; it is used to make wear-resistant, corrosion-resistant, high temperature resistant and other advanced silicon carbide ceramic materials; it can also make rocket nozzle, gas turbine blades, etc. In addition, silicon carbide is also one of the ideal materials for highways, airplane runway solar water heaters, etc.
The use of silicon carbide has high temperature resistance, high strength, good thermal conductivity, impact resistance, for high temperature indirect heating materials, such as the firm tank distillation furnace, distillation furnace tower plate, aluminum electrolytic tank, copper melting furnace lining, zinc powder furnace with arc plate, thermocouple protection tube, etc.
The use of silicon carbide corrosion resistance, thermal shock resistance and wear resistance, good thermal conductivity, used in large blast furnace lining to improve the service life.
Metallurgy and mineral processing
Silicon carbide hardness is second only to diamond, has strong wear resistance, is the ideal material for wear-resistant pipe, impeller, pump chamber, cyclone, ore hopper lining, its wear resistance is cast iron. Rubber service life of 5-20 times is also one of the ideal materials for aviation runway.
Building materials ceramic grinding wheel industry
The use of its thermal conductivity, thermal radiation, high thermal strength, manufacturing thin plate kiln furniture, not only can reduce the capacity of the kiln, but also improve the installed capacity of the kiln and product quality, shorten the production cycle, is the ideal indirect material for ceramic glaze baking and sintering.
The use of good thermal conductivity and thermal stability, as a heat exchanger, combustion consumption is reduced by 20%, saving fuel 35%, so that the productivity increased by 20-30%, especially in the mine selection plant with emissions from the internal release of the transport pipe, its wear-resistant degree is 6-7 times more than ordinary wear-resistant materials.
Synthetic silicon carbide, also known as synthetic moissanite, synthetic carbon silica (chemical composition SiC), dispersion 0.104, larger than the diamond (0.044), refractive index 2.65-2.69 (diamond 2.42), with the same diamond diamond diamond luster, “fire color” stronger, closer to the diamond than any previous imitation products.