High carbon silicon is different from Silicon Carbide
May 10, 2022
What is Silicon Carbide
Silicon carbide is a non-metallic carbide composed of silicon and carbon elements covalently bonded, and its hardness is second only to diamond and boron carbide. The chemical formula is SiC. Colorless crystals, blue-black in appearance when oxidized or containing impurities. The silicon carbide variant with a diamond structure is commonly known as emery. The hardness is close to that of diamond, and the thermal stability is good.
Composition of Silicon Carbide
Industrial silicon carbide is artificial silicon carbide with a SiC content of 95% to 99.5%, often containing a small amount of free carbon, as well as impurities such as Fe2O3, Si and SiO2.
Uses of Silicon Carbide
1. In the electrical industry, silicon carbide can be used as arrester valve body, silicon carbon electric heating element, far infrared generator, etc.
2. In the aerospace industry, gas filters and combustion chamber nozzles made of silicon carbide have been used in rocket technology.
3. Low-grade silicon carbide can be used as steel-making deoxidizer and cast iron additive.
4. In the carbon industry, silicon carbide can be used to produce bricks for iron-making blast furnaces, such as graphite silicon carbide and silicon carbide bricks combined with silicon nitride.
5. In the production of graphite electrodes, silicon carbide is also used in the preparation of coated refractory sintered materials for oxidation-resistant coated electrodes to increase the coating's ability to withstand rapid changes in temperature.
High carbon ferrosilicon is also called silicon carbon alloy. Its main elements are silicon and carbon. The common indicators of silicon and carbon are 3515, 4515, 5515 and 6515. It can be seen that its carbon content is relatively high, so it is also high in carbon content. High carbon ferrosilicon is often used in steelmaking furnaces.
High-carbon silicon is a new type of strong composite deoxidizer. It can also be used in the smelting of general steel and plain carbon steel. Its main elements are silicon and carbon. The activity of silicon is high, the reaction is fast, and the furnace temperature can be increased. Therefore, high-carbon silicon can replace the traditional heating agent with higher price when steelmaking in converter and open hearth furnace.
High carbon ferrosilicon is a commonly used deoxidizer and has the following advantages: carbon and silicon are important elements that determine the function of steel. It can also be dissolved in molten steel to increase silicon and carbon. Adding a certain amount of silicon to steel can significantly improve the strength, hardness and elasticity of steel. Have the effect of killing two birds with one stone. Deoxidation is required in steelmaking, and the chemical affinity between silicon and oxygen is very large, so ferrosilicon is a strong deoxidizer in steelmaking for precipitation and diffusion deoxidation.
