160kA预焙铝电解槽电流强化后热平衡的数值计算  

Numerical calculation of heat balance adjustment of 160kA pre-baked aluminium reduction pot after current strengthen

作　　者：张红亮[1] 张翮辉[1] 李劼[1] 吕晓军[1] 徐宇杰[1] 崔喜风[1] 丁凤其[1] 邹忠[1] 

机构地区：[1]中南大学冶金科学与工程学院湖南长沙410083

出　　处：《轻金属》2011年第11期33-36,共4页Light Metals

基　　金：国家高技术发展研究计划(2008AA30504);国家自然科学基金项目(50874120);国家科技支撑计划(2009BAE85B02)

摘　　要：电流强化是提高铝电解槽产能和劳动效率的有效途径,但同样会带来热场等槽况的波动,需要调节相关生产工艺以维持热量平衡,确保生产的平稳运行。本文以某160kA中小型铝电解槽为对象,采用有限元分析软件ANSYS平台进行电热平衡数值仿真计算。结果表明,当该型电解槽电流强化至180kA时,将极距和上部氧化铝覆盖料厚度分别降低10mm和15mm,并将铝水平提高20mm,可维持良好的热平衡状况。工业实验证明,通过同时对控制精度及工艺的调整,该槽型电流效率从92.5%提高到93.5%,直流电耗由13600kWh/t-Al降至12400kWh/t-Al。The output and labour efficiency of aluminium reduction pots can be improved by current strengthen,but it will cause oscillation of pot condition,especially the heat field.So it is necessary to adjust the productive technology to keep heat balanced and insure regular production.In this paper,a thermal-electric model of 160kA aluminium reduction pot is developed by finite-element analysis software ANSYS.Calculation results show that to keep good heat balance after the current intensity increased to 180kA,the anode cathode distance and height of alumina covering of the above aluminium reduction pot should decrease by 10mm and 15mm respectively,and the height of aluminium melt should increase by 20mm.Practice has proved that through control and technology readjustment,the current efficiency can be increased to 93.5% from 92.5%,and DC consumption can be reduced form 13600kWh/t-Al to 12400kWh/t-Al.

关 键 词：铝电解 电解槽 电流强化 热平衡 数值计算 

分 类 号：TF821[冶金工程—有色金属冶金] O411.3[理学—理论物理]