China Nonferrous Metallurgy

A large zinc polar plate is conducive to save investment, expand production capacity, and improve production efficiency. However, the production control requirements are also high. Improper control of key points in the production process will affect the zinc plate quality and increase the cost of electrowinning. In this paper, combined with the production practice of 3.2m² large polar plate of Yunxi Wenshan Zinc Indium Smelting Co., Ltd., the influence factors of zinc electrowinning quality and cost are analyzed, which including new solution quality, cathode and anode plates, electrolytic liquid circulation, bath temperature, acid zinc ratio, precipitation cycle, cell management. After optimizing, analyzing and improving the above factors, zinc plates with high chemical quality and better density are obtained, and economic and technical indicators such as electricity efficiency and DC power consumption are excellent, which shows that the improvement measures can stabilize the production and is of positive significance in reducing costs and increasing efficiency.