The “400KA large-scale prebaked anode aluminum electrolyzer technology” jointly completed by China Aluminum Lanzhou Branch and China Aluminum International Shenyang Aluminum Magnesium Design and Research Institute successfully passed the scientific and technological achievements appraisal organized by the China Nonferrous Metals Industry Association.

In the first trial of 16 400KA electrolyzers operated by Lanzhou Branch of Chinalco, during 10 months of operation, the current intensity reached an unprecedented 403KA, the anode current density reached an unprecedented 0.82A/cm2, and various technical indicators were advanced. success. Compared with the existing electrolytic cell, the electrolytic cell adopting this new technology has the characteristics of low investment, large capacity, and high economic benefit. The annual output of aluminum in a single cell can increase by more than 100 tons, and it is beneficial to increase gas collection efficiency and Improve the environment. At the same time, because this technology adopts a full control and standardized operation system of the electrolytic cell, the balance and material balance of the electrolytic cell are effectively controlled, and a set of stable and safe roasting technology suitable for large-scale electrolytic cells has been developed, forming a set and a large scale. The production operation management technology supported by the electrolytic cell lays the foundation for the next research and development of a larger electrolytic cell technology.

At present, most domestic and foreign electrolytic aluminum enterprises use mostly prebaked anode electrolyzer technology with capacity of 160KA to 350KA. The successful research and development of this technology by Chinalco Lanzhou Branch laid a solid foundation for improving the competitiveness of China's aluminum industry.