Powdering of activated alumina means that the particles of activated alumina will gradually become smaller and finally disperse into powder during use. This phenomenon may lead to a decrease in product quality and pose certain risks to the working environment and the health of operators. The following are several methods to avoid the pulverization of activated alumina:
Control of mixing speed: too high mixing speed is easy to cause collision between activated alumina particles, which will lead to particle size change and pulverization. Therefore, during mixing, the mixing speed should be controlled as much as possible to avoid being too fast.
Lower the heating temperature: if the heating temperature is too high, the water of crystallization in activated alumina will be lost, which will lead to particle size reduction and pulverization. Therefore, it is necessary to control the heating temperature reasonably to avoid being too high.
Adding stabilizer: during the production process, some stabilizers can be added to improve the stability of activated alumina, so as to avoid pulverization. Commonly used stabilizers include sodium silicate, PEG, etc.
Reasonable storage: in order to avoid the pulverization of activated alumina, it is also necessary to store it reasonably. Generally speaking, activated alumina should be stored in a dry, cool and ventilated environment, and long-term exposure to sunlight or high temperature should be avoided.