If you want to reduce the impurity content in calcined alumina and improve the purity of calcined alumina, you need to use methods such as heating medium filtration and adding complexing agents. How is calcined alumina made? It is obtained by calcining industrial alumina powder at a high temperature of more than 1300℃. During calcination, different temperatures will affect the performance characteristics of the product itself.
1. To improve the stability of the product, it is necessary to extend the insulation time, which is an important link in controlling the characteristics and performance of the product. The longer the insulation time, the more stable the product performance.
2. The hardness, high temperature resistance and shrinkage rate of calcined alumina are related to calcination stability. The higher the calcination temperature, the higher the values of these factors. When calcined alumina is used as a raw material for ceramics and refractory materials, the calcination temperature should be controlled at around 1400℃ and the insulation time should be controlled at more than 10 hours.
In summary, the characteristics and performance of calcined alumina will be affected by the calcination temperature and holding time. Therefore, enterprises should control the calcination temperature and holding time on the basis of mastering the calcination method to ensure that the performance of calcined alumina is better. However, it is worth noting that the higher the calcination temperature, the higher the processing cost. Therefore, manufacturers can choose the appropriate calcination temperature according to the processing environment and the specific use of the product.
