In order to meet the requirements of national energy-saving and carbon reduction policies,a company has adopted a green,low-carbon and deep energy-saving aluminum electrolysis technology system to systematically optimize and upgrade its 240 kA potline in situ.Through the application of high-stability magnetic field in-situ upgrading technology,graphitized composite cathode structure technology,lining structure with electrothermal bal-ance optimization technology,a set of baking start-up and production control process technology is independently explored that matches the design,thus improving the MHD stability of aluminum electrolysis cells and reducing the horizontal current as well as the cathode voltage drop in the aluminum liquid.The current efficiency has increased by 4.33％and the average DC power consumption of the aluminum liquid is 12 479 kWh/t-Al,which is 864 kWh/t-Al lower than before,and the aluminum output in the potline has increased by about 14 000 t/a.
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