(1. 中南大學 能源科學與工程學院，長沙 410083；
2. 中南大學 冶金與環(huán)境學院，長沙 410083)
摘 要: 采用數值仿真的方法對應用一種可減小鋁液中水平電流的新型陰極鋼棒的420 kA級鋁電解槽進行三維計算，分析這種新型陰極鋼棒對鋁液中水平電流、槽電壓以及電解槽溫度分布的影響。結果表明：新型陰極鋼棒可有效地減小鋁液中X方向的水平電流；新型陰極鋼棒中絕緣材料的加入在一定程度上增大了槽電壓；當鋼棒和鋼棒糊接觸不是很好時，新型陰極鋼棒電解槽比傳統(tǒng)陰極鋼棒電解槽更容易出現陰極炭塊和鋼棒連接區(qū)域溫度過高的情況。該計算結果可為鋁電解槽在應用此種新型陰極鋼棒后所獲得的節(jié)能效果以及個別槽在運行過程中出現的問題提供理論依據。
關鍵字: 鋁電解槽；新型鋼棒；水平電流；電熱場；數值模擬；電接觸
（1. School of Energy Science and Engineering, Central South University, Changsha 410083, China;
2. School of Metallurgy and Environment, Central South University, Changsha 410083, China）
Abstract:3D thermal-electric field of 420 kA aluminum reduction cell with a kind of innovative cathode collector bar was calculated by using numerical simulation method. The effects of innovative cathode collector bars on horizontal current in aluminum liquid pool, cell voltage and temperature distribution were analyzed. The results show that the innovative cathode collector bar can effectively reduce the horizontal current density along X axis. The insulating materials in the innovative cathode collector bars increase the cell voltage to some extent. Under poor contact condition between the cathode collector bar and its paste, the cathode contact area of aluminum reduction cell with innovative cathode collector bars is easier to be overheated than that of aluminum reduction cell with conventional cathode collector bars. The research results can provide theoretical basis for the high energy efficiency achieved by most aluminum smelters and the problems in a few potlines during the application of the innovative cathode collector bar.
Key words: aluminum reduction cell; innovative cathode collector bar; horizontal current; thermo-electric field; numerical simulation; electric contact
