1. Characteristics of alumina production
Alumina scratches are a very complicated subtractive smelting process. In terms of the production process, the six major domestic alumina production sites are based on the Bayer process and the sintering process, and have formed their own distinctive production systems. In terms of process principle, the use of gender characteristics is used to extract and separate the rape medium to obtain aluminum hydroxide products. In this process, the alkali is only used as a carrier for extracting aluminum and is repeatedly recycled in the process. According to the production characteristics, the alumina transferers have been making unremitting explorations to increase the dissolution rate of aluminum, increase the efficiency of the alkali cycle, increase the decomposition rate, improve product quality, reduce energy consumption, reduce alkali consumption, and increase equipment operation rate. But every research work cannot lack physical and chemical detection technology.
2. Materials in alumina production
The materials involved in the alumina production process have the characteristics of high alkali content, poor stability, multiple types, complex components, and wide detection technologies. The materials can be divided into four categories, more than 20 kinds of sub-categories, and each sub-category can be divided into different samples with different components and large differences in content.