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Let’s talk about the important applications of reaction-sintered silicon carbide and the characteristics of sealing rings.

Release time:

2022-11-08

　　Silicon carbide (SiC) is produced by continuously high-temperature smelting in an electric furnace, using raw materials such as quartz sand, calcined petroleum coke (or coal coke), and wood ash (salt needs to be added when manufacturing green silicon carbide). A silicon carbide seal ring is a type of silicon carbide product made from silicon carbide material. Thus... Reaction-sintered silicon carbide What are the important applications and characteristics of sealing rings?

　　Important applications of reaction-sintered silicon carbide:

　　1. In the metal products industry, silicon nitride is used as a material for applications requiring high thermal resistance, high strength, excellent thermal conductivity, impact resistance, and sustained high-temperature indirect heating—such as in distillation tanks, rectifier furnace trays, aluminum electrolytic cells, linings for copper melting furnaces, zinc powder arc furnaces, and thermocouple protective tubes.

　　2. In the iron and steel industry, silicon nitride is used for its corrosion resistance, thermal shock resistance, and wear resistance. Due to its excellent thermal conductivity, it is employed as a lining material in large-scale blast furnaces, thereby extending their service life.

　　3. In the metallurgical industry’s mineral processing plants, silicon nitride boasts a strength second only to that of diamond and exhibits exceptional wear resistance. It is an ideal material for wear-resistant and high-performance pipelines, centrifugal impellers, pump housings, rotating machinery, and mine lining applications, offering outstanding wear resistance. Its service life is 5 to 20 times longer than that of conventional plastics, making it one of the ideal materials for aerospace runways.

　　4. In the industrial production of decorative building materials, porcelain, and abrasive wheels, the thermal conductivity, radiant heat, and high-temperature resistance characteristics of metal thin-sheet kilns not only enable a reduction in kiln volume but also increase the kiln’s storage capacity and product quality, shorten production time, and make them an ideal indirect material for firing ceramic pigments.

　　5. In terms of environmental protection and energy conservation, the material’s excellent thermal conductivity and heat resistance enable it to achieve the following benefits: heat exchangers can save 20% on energy consumption, fuel consumption can be reduced by 20%, and fuel consumption can be cut by as much as 35%, resulting in a 20-30% increase in production efficiency. In particular, in mineral processing plants, the wear resistance of the discharge water pipelines made from this material is 6 to 7 times higher than that of conventional metal composites.

　　 Reaction-sintered silicon carbide Sealing ring features:

　　1. Heat-resistant

　　Due to the properties of silicon nitride material, silicon nitride seals exhibit high-temperature resistance; different manufacturing processes result in varying degrees of thermal resistance. Reaction-sintered silicon nitride seals can be used at temperatures up to 1300°C, while pressureless-sintered silicon nitride seals can withstand temperatures as high as 1600°C.

　　2. Corrosion resistance

　　Silicon nitride sealing rings can be used in harsh environments involving strong acids and strong bases, and their sealing performance is unlikely to degrade.

　　3. Wear Resistance Performance

　　Reaction-sintered silicon carbide sealing rings, processed using a specific refining and machining technique, achieve high precision and smoothness on their flat surfaces. Combined with the wear-resistant properties of silicon carbide material, these rings can be used in frictional pairs with silicon nitride sealing rings. Their excellent high-temperature performance ensures that their wear resistance remains unchanged even under sustained high-temperature conditions.

　　4. Ductility

　　 Reaction-sintered silicon carbide As long as the raw materials undergo a certain processing technique, they can be transformed into blanks with various patterns, which can then be further processed to create products exactly as consumers desire.

　　I won’t go into further details—let’s meet again next time.

A basic overview of silicon carbide furnace tubes?

Let’s talk about the reaction-sintered silicon carbide processing technology.