New Cathodes in Aluminum Reduction Cells

Three aluminum electrolysis cells with a novel uneven cathode bottom are being operated successfully in Chongqing Tiantai Aluminum Industry Co., Ltd., China. More and more aluminum smelters are using this type of cathode. In the past year the three 168 kA cells have produced steadily at low cell voltages of 3.70 V to 3.75 V, and the current efficiency (CE) has been improved by at least 1 % in comparison with 127 traditional model cathode cells in the same potline. The technical characteristics of the cells are described in this paper.