Polyaluminum chloride production process of aluminum metal The raw materials used in this process are aluminum scrap aluminum scrap, aluminum and aluminum slag and so on. In the process can be divided into acid, alkali, and three kinds of law. At present, most of the aluminum polychlorinated aluminum producers in our country use acid as the raw material. (1) The acid-based acid method has the advantages of fast reaction, less equipment investment, simple process and convenient operation, but the impurity content in the solution is high, especially the content of heavy metal elements is usually easily exceeded, the product quality is unstable and the equipment is seriously corroded . (2) Alkaline process is more difficult to produce by alkali process, with large equipment investment. Due to large amount of alkali, a large amount of hydrochloric acid is needed to neutralize to pH = 4-5 with high cost, and its application is limited. (3) Neutralization Act. The nature of the neutralization method is the combination of the advantages of both acid and alkaline processes. Neutralization method is the key to the synthesis of PAC, the ratio between the sodium aluminate and aluminum trichloride solution must be strictly controlled so that the basic level of salt to meet the standard requirements. Whether the basicity of the salt is qualified is an important indicator of product quality. And in the synthesis must be vigorously stirred.