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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 15    No. 4    August 2005

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Numerical simulation of current distribution in metal pad of aluminum reduction cells
QI Xi-quan(戚喜全),  FENG Nai-xiang(冯乃祥), CUI Jian-zhong(崔建忠)

School of Materials and Metallurgy, Northeastern University, 
Shenyang 110004, China

Abstract: Based on the numerical calculation of 3-D potential distribution in aluminum reduction cells, current distribution in the metal pad is calculated under the following conditions: 1) pot ledge ideally formed; 2) ledge extension to below anode; 3) different metal heights; 4) AC and 5) Spike. It is found that Jy in metal pad increases first to a highest point and then decreases along anode length. At normal status, the largest Jy is about 0.4A/cm2  and it locates at about 2/3 of anode length. With longer ledge, the maximum value of  Jy decreases and its position moves center-ward. The longer the side ledge, the larger the negative current flowing center-ward at side channel. Jz in metal pad increases with anode length and it is not affected by metal height; while Jy increases with metal height. At AC, current flows toward metal under new anode. At spike, current concentrates at spike rather than evenly distributes. Normally, Jx is almost negligible in metal pad.

 

Key words: aluminum reduction cell; current density; numerical simulation; metal pad 

ISSN 1672-7029
CN 43-1423/U

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