Sustainable Mining and Metallurgy

Due to the proposal and implementation of the national carbon peak and carbon neutrality strategic goal, the technical upgrading direction of the electrolytic aluminum industry has gradually shifted to energy-saving transformation. The 330kA electrolytic cell in an aluminum plant has the problems of high energy consumption and low current efficiency. After review, it is found that the magnetic field distribution of the cell bus is uneven and the value is too large, and the lower flue gas collection form of the superstructure has poor effect. At the same time, the traditional gas-controlled shelling and blanking system is not conducive to reducing the impact of aluminum oxide blanking on the superheat and heat balance of the electrolytic cell. In view of these problems, this paper adopted the green low-carbon deep energy-saving aluminum electrolysis technology system, applied network self-balancing bus technology, “long healthy life” lining structure and heat balance technology and energy-saving superstructure to optimize the energy saving of the electrolysis series. After optimization, the current intensity was increased to 350kA, the DC power consumption per ton of aluminum liquid was reduced by 634kW·h/t-Al, and the current efficiency was increased by 1.89%, and the effect of energy saving and production increase was significant.