Sustainable Mining and Metallurgy

Through statistical analysis of aluminum levels at the furnace gate of 140 sets of 350kA electrolysis cells, the variation regularity of aluminum level with the position of the anode replacement was studied. A correction model was developed to eliminate the effect from anode replacement and verified by actual electrolytic cells. The research methods are as follows: first, count the median aluminum level corresponding to each rotating pole single cell, then count the difference between the aluminum level when replacing anodes at different positions and the median aluminum level of this rotating pole, and the median aluminum level deviation of different electrolytic cells when replacing anodes at the same position.Analysis results indicate that the aluminum level changes periodically with the change of pole changing position: when changing anodes at different positions in each round, the aluminum level deviation first increases, then decreases, and then maintains the same level; The aluminum horizontal deviation at the incoming and outgoing terminals shows obvious antisymmetry with the pole changing position. The aluminum level deviation interquartile spacing (10mm) can be used as the corresponding maximum deviation reference value to correct the aluminum level. It is proved that the fluctuation of aluminum level becomes smaller after correction, which is more conducive to guiding production.