Industry Test of Perforation Anode in Aluminium Electrolysis Technology

In recent years aluminum industry in China has been developed rapidly. In 2011 China’s electrolytic aluminum output reached 18.06 million tons and has topped the list in the world for 11 consecutive years. However, the energy and environmental issues restrain development of aluminum industry. So it is necessary to promote the use of energy saving technology in the aluminum industry. The composition of the cell voltage is analyzed in this paper. It is reasonable that the cell voltage of ordinary flat cathode cell is about 4.05V. The approximate linear relationships between the bubble layer thickness and the anode width is analyzed. Changing the structure of the anode and adding two rows of the vent on the common anode can reduce the gas running distance below carbon anode, anodal bubble voltage and the work voltage of aluminum reduction cells under the same current efficiency of aluminum reduction cells. Perforated anode technology was tested in small-scale and large-scale industrial cells and the experimental results show that average current efficiency of the test cell is 91.447%, the direct current consumption reaches 12337kwh/T-Al. The anode effect coefficient of the test cell with good thermal balance reduces to an average of 0.185 time /cell–day. The results are consistent with the theory and a comprehensive promotion goal is achieved.