If you want to reduce the impurity content in calcined alumina and improve the purity of calcined alumina, you need methods such as heating medium filtration and adding complexing agent. How is calcined alumina made? It is obtained by calcining industrial alumina powder at a high temperature above 1300°C. During calcination, the difference in temperature will affect the performance characteristics of the product itself. So what effect does the calcination temperature have on the properties of alumina?
1. In order to improve the stability of the product, it is necessary to extend the holding time, which is an important part of controlling the characteristic performance of the product. The longer the holding time, the more stable the product performance.
2. The hardness, high temperature resistance and shrinkage of calcined alumina are related to the stability of calcination. The higher the calcination temperature, the higher the value of these factors. When calcined alumina is used as a raw material for ceramics and refractory materials, the calcining temperature should be controlled at about 1400°C, and the holding time should be controlled at more than 10 hours.
To sum up, the characteristics and performance of calcined alumina will be affected by the calcination temperature and holding time, so enterprises should control the calcining temperature and holding time on the basis of mastering the calcination method to ensure that the performance of calcined alumina is better excellent. 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.
