China Nonferrous Metallurgy

As one of the main operations in aluminum electrolysis production, changing the anode will damage the material and energy balance of the electrolytic cell, reduce the current efficiency, cause bulging on the anode and even rolling aluminum accident, therefore has a great influence on the stability of the electrolytic cell. Based on the background of SY300kA electrolytic cell in an electrolytic aluminum plant, this paper analyzes two common anode-changing sequences, measures the changing trend of electrolyte temperature after anode-changing, theoretically calculates the heat loss of anode-changing and tracks the current distribution characteristics of the electrolytic cell after anode-changing. The impact of reasonable anode changing sequence on the stability of electrolytic cell and the impact of anode changing operation on the temperature field and current distribution of electrolytic cell are obtained. In addition, the improvement measures are proposed from two aspects of adjusting the site technological conditions and improving the operation quality, providing reference for anode changing operation of similar electrolytic aluminum plants.