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How Is Silicon Carbide Produced?

Raw Material Preparation

Step	Explanation
Selection of Raw Materials	The main raw materials for silicon carbide production are high - quality silica sand (SiO₂) and carbon - containing materials such as petroleum coke or anthracite coal. The silica sand should have a high silicon dioxide content, and the carbon - containing material should have a low ash content.
Pretreatment	The raw materials are usually crushed and screened to obtain the appropriate particle size. The carbon - containing material may also be calcined to remove volatile substances and improve its reactivity.

Reaction in an Electric Arc Furnace

Step	Explanation
Mixing	The prepared silica sand and carbon - containing material are mixed in a specific ratio, usually around 1:0.75 by weight. The mixture is then loaded into an electric arc furnace.
Heating	An electric current is passed through the mixture in the furnace, generating high temperatures (around 2000 - 2500 °C). At this high temperature, a chemical reaction occurs between the silica sand and carbon: SiO₂ + 3C → SiC + 2CO↑. The reaction takes several hours to complete.

Post - treatment

Step	Explanation
Cooling and Crushing	After the reaction is completed, the furnace is cooled down. The silicon carbide block formed in the furnace is then removed and crushed into smaller particles.
Purification	The crushed silicon carbide may undergo purification processes such as acid leaching to remove impurities like iron, aluminum, and other metal oxides. This helps to improve the purity of the silicon carbide product.
Classification	Finally, the purified silicon carbide particles are classified according to their particle size using sieving or other classification methods to obtain different grades of silicon carbide products suitable for various applications.

Pub Time : 2025-10-17 16:49:04 >> News list

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company news about How Is Silicon Carbide Produced?

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