Aluminum industrial wastewater;  Closed circuit;  pollution;  Wastewater treatment

In view of the current situation of the discharge of wastewater from aluminum industry in China, combined with the actual situation of large water consumption and large amount of wastewater discharged and heavy pollution in the production of alumina of China Great Wall Aluminum Company, the pollution of wastewater in the aluminum industry and its impact on production are comprehensively analyzed for many years, and the water resource problems that need to be solved urgently in the aluminum industry are studied, and specific measures for closed-circuit treatment are proposed one by one to reduce the amount of wastewater discharge, reduce pollution, and save primary water use, so as to realize the unity of environmental, economic and social benefits of the aluminum industry.