Process Flow for Preparation of Industrial Polyaluminum Chloride from Kaolin
The preparation of industrial polyaluminium chloride from kaolin is one of the main ways to prepare industrial polyaluminium chloride. How to find an effective way to improve the efficiency of the preparation of industrial polyaluminium chloride from kaolin is a difficult problem. Let's first look at the process of preparing industrial polyaluminium chloride with kaolin.
Kaolin is a white or clay-like rock with different shades, mainly composed of about2μmThe scaly or tubular kaolinite mineral consists of small crystals, the main components are (Al2O3,SiO2,2H2O). Although produced from kaolinIndustrial Polyaluminium ChlorideIt is cheap, but the manufacturing method is relatively complicated. However, the waste residue can be used as an excellent filler for paint and sheet products as well as highly reactive silicone materials. Therefore, kaolinite is used to produceIndustrial Polyaluminium ChlorideCheap and valuable raw materials.
Currently, most are produced from kaolinIndustrial Polyaluminium Chloride（PAC) The method is to dissolve kaolin through a two-step method, that is, calcine kaolin, then use a certain concentration of hydrochloric acid to leach aluminum, and adjust the alkalinity of the leaching solution into chloride. Liquid aluminum products. Although the manufacturing process is relatively simple and easy to operate, pretreatment of the kaolin with hydrochloric acid prior to the roasting process in the regular process is advantageous for increasing the leaching rate of aluminum, which is not very satisfactory.
prepared from kaolinIndustrial Polyaluminium Chloride（PAC) Many factors should be considered in the process, including pretreatment ratio, reaction temperature, reaction time, reaction pressure, etc. During pretreatment, hydrochloric acid is proportionally mixed with kaolin and dried. Then, the kaolin was pulverized80The pulverized ore powder is mixed with hydrochloric acid in a certain proportion, and put into the reactor under constant stirring to control the temperature140-150℃, the pressure is0.4-0.5MPa,1.5-2During the reaction, the alkalinity was adjusted by adding calcium aluminate, and finally a liquid product was obtained.
Introduction of microwave reaction to manufacture water purifier in new process reaction process of industrial aluminum chloride wastewater and kaolin as raw materialsIndustrial Polyaluminium Chloride, Microwave energy is used for pyrolysis, which greatly improves the reaction efficiency and promotes the aluminum and aluminum of more hydrochloric acid kaolin in the wastewaterPACIt is dissolved and polymerized, which simplifies the process flow, shortens the pyrolysis time, and has a high degree of polymerization.
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