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Uses of silicon carbide


Uses of silicon carbide

1. Application in non-ferrous metal smelting industry

The use of silicon carbide has high resistance, high strength, good thermal conductivity, impact resistance, and can be used as a high indirect heating material, such as a strong pot distillation furnace. Rectification furnace tray, aluminum electrolytic cell, copper melting furnace lining, zinc powder furnace arc plate, thermocouple protection tube, etc.

2. Application in steel industry

Utilizes the corrosion resistance of silicon carbide. Resistant to thermal shock and abrasion. With good heat conduction, it is used in the lining of large blast furnaces to improve the service life.

3. Application in metallurgical mineral processing industry

The hardness of silicon carbide is second only to that of diamond, and it has strong wear resistance. It is an ideal material for wear-resistant pipes, impellers, pump chambers, cyclones, and linings of mine buckets. Its wear resistance is better than that of cast iron. The service life of rubber is 5-20 times, and it is also one of the ideal materials for aviation runways.

4. Application in building materials ceramics and grinding wheel industry

Use its thermal conductivity. With the characteristics of heat radiation and high heat intensity, the manufacture of thin plate kiln furniture can not only reduce the capacity of kiln furniture, but also improve the loading capacity and product quality of the kiln, shorten the production cycle, and is an ideal indirect material for ceramic glaze baking and sintering.

5. Application of energy saving

Using good thermal conductivity and thermal stability as a heat exchanger can reduce fuel consumption by 20%, save fuel by 35%, and increase productivity by 20-30%. In particular, the wear-resisting degree of the discharge conveying pipes used in mine dressing plants is 6-7 times that of ordinary wear-resistant materials.

>>>1.Abrasives - mainly because silicon carbide has high hardness, chemical stability and certain toughness, so silicon carbide can be used to manufacture bonded abrasives, coated abrasives and free grinding to process glass, ceramics, stone , cast iron and some non-ferrous metals, hard alloys, titanium alloys, high-speed steel tools and grinding wheels, etc.

>>>2. Refractory materials and corrosion-resistant materials---mainly because silicon carbide has a high melting point (decomposition), chemical inertness and thermal shock resistance, so silicon carbide can be used for grinding tools and ceramic products in kilns A variety of silicon carbide ceramic products such as shed boards and saggers used in Chinese medicine, silicon carbide bricks for vertical cylinder distillation furnaces in zinc smelting industry, aluminum electrolytic cell linings, crucibles, and small furnace materials.

>>>3. Chemical application - because silicon carbide can be decomposed in molten steel and react with ionized oxygen and metal oxides in molten steel to generate carbon monoxide and silicon-containing slag. Therefore, it can be used as a purifying agent for smelting iron and steel, that is, as a deoxidizer for steelmaking and a modifier for cast iron structure. This generally uses low-purity silicon carbide to keep costs down. At the same time, it can also be used as a raw material for the manufacture of silicon tetrachloride.

>>>4. Electrical purposes - used as heating elements, non-linear resistance elements and high semiconductor materials. Heating elements such as silicon carbide rods (suitable for various electric furnaces operating at 1100-1500°C), non-linear resistance elements, and various lightning protection valves.

>>>5. Others are formulated into far-infrared radiation coatings or made into far-infrared radiation dryers for silicon carbide silicon plates.
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