Activated alumina balls are white spherical objects made by processing aluminum hydroxide powder into spherical shapes, and then firing them at high temperatures in a kiln to produce activated alumina balls or other crystalline activated alumina ball products.
The production process of activated alumina using this method is called the Bayer process. The basic process of the Bayer process is as follows:
First, the preparation of raw slurry, which involves preparing a series of raw materials such as bauxite, limestone, sodium chloride solution, etc., according to a certain proportion to generate chemical compositions and physical properties that meet the requirements of leaching ingredients. The most important material is bauxite, which requires very high quality. Many provinces in China have bauxite reserves, but bauxite that meets the Bayer process firing process is concentrated in Guangxi, Henan, and other places. Especially in Guangxi, it is the largest bauxite province in China. Bauxite mined in Guangxi has high aluminum, high iron, high alumina-silicon ratio, low water content, and other characteristics, which are necessary for the production of alumina.
After the first process of preparing the raw slurry, subsequent processes include high-pressure leaching of the raw slurry, dilution of the slurry, separation and washing of the red mud, and decomposition of primary crystals. Finally, activated alumina balls that meet performance requirements are produced. The process is very complicated, with some processes requiring very strict requirements. For example, even simple firing processes require many process indicators, and if not met, the performance of the generated alumina will not reach the standard. The chemical equation is: 2Al(OH)3=(heating)=Al2O3+3H2O. After high-temperature dehydration, the desired alumina balls are produced.
