- Time:Aug 12, 2023
The reason why refractories need to be sintered is to improve their physical and chemical properties, enhance their refractoriness and mechanical strength. The following is a detailed introduction to several main purposes and effects of refractory sintering:
1. Improve compactness: During the sintering process of refractory materials, through the diffusion and rearrangement at high temperature, the particles are combined, thereby improving the compactness of the material. This helps to reduce porosity, increase the compactness of the material, and improve the slag erosion resistance and temperature difference resistance of the refractory.
2. Improve refractoriness: Sintering can promote chemical reactions in refractory materials to form more stable compounds and crystal structures. These newly formed compounds have higher melting points and better refractory properties at high temperatures, improving the high temperature resistance of refractory materials.
3. Improve mechanical strength: During the sintering process, the combination of particles at high temperature makes the structure of the refractory material more compact and strong, and increases the bonding force between particles. This results in increased mechanical strength of the refractory, providing better compressive and tensile strength.
4. Promote crystal growth: During the sintering process of refractory materials, crystal particles gradually grow and crystallize. This helps to increase the material's grain size and crystallinity, improving the material's thermal conductivity and shock resistance.
5. Improve chemical stability: some original forms of refractory components will undergo chemical reactions during sintering to form more stable and durable compounds. These compounds have good corrosion resistance and can resist acid and alkali corrosion and other chemical media.
In general, the sintering process of refractory materials makes them more suitable for harsh working conditions such as high temperature, corrosion and mechanical stress by increasing the compactness, improving refractoriness, enhancing mechanical strength, promoting crystal growth and improving chemical stability. usage of. Different types of refractory materials may require different sintering processes and conditions to achieve the best performance and quality.
