Sustainable Mining and Metallurgy

In order to improve the current efficiency, reduce the power consumption per ton of aluminum and prolong the service life of aluminum reduction cells, an electrolytic aluminum plant used a fully graphitized cathode to replace the 50% graphite cathode of the original 500kA aluminum reduction cell. Because the fully graphitized cathode has the characteristics of high conductivity, high thermal conductivity, strong resistance to sodium erosion and small thermal expansion coefficient, the voltage management of the fully graphitized cathode aluminum electrolytic cell is different from that of the 50% graphite cathode aluminum electrolytic cell in the production process. In this paper, the causes of abnormal phenomena such as voltage jump in roasting stage, high noise value in abnormal period and cold tank in normal production period in the production process of 500kA series fully graphitized cathode aluminum electrolytic cell were analyzed, and the voltage management strategies in each period were given.