铝电解槽热平衡均匀性优化实践  

Optimization of the Heat Balance Uniformity of Aluminum Electrolytic Cells

作　　者：周锋 王怀江[1] 李刚[1] 王富强[2] ZHOU Feng;WANG Huai-jiang;LI Gang;WANG Fu-qiang

机构地区：[1]遵义铝业股份有限公司,贵州遵义563100 [2]沈阳铝镁设计研究院有限公司,辽宁沈阳110001

出　　处：《有色冶金节能》2022年第4期33-36,共4页Energy Saving of Nonferrous Metallurgy

摘　　要：某公司350 kA电解槽长期存在热平衡差异性大的问题,主要原因是支烟管阀门不能均匀控制每台电解槽的排烟量,烟道集气性能偏低。通过支烟管和烟道在线改造调节槽上部排烟和散热状况,进而达到提高电解槽密闭效率和优化热平衡均匀性的目的。实践结果表明,改造后,实测支烟管的槽间排烟偏差由-23%~30%优化至±10%以内,单槽槽膛内的集气均匀性偏差由-52%~30%优化至-7%~5%,彻底解决了烟道积灰问题,电解槽密闭效率显著提升,车间内环境改善明显;实测出铝端与烟道端槽温偏差由6℃降至3℃,烟道端沉淀明显减少,电解槽热平衡均匀性得到显著改善。There is a long-term problem of large heat balance difference in 350 kA electrolyzers in a company.The main reasons are that the smoke exhaust volume of each electrolyzer cannot be uniform by the smoke pip valve,and the gas gathering performance of the flue is low.Through on-line modification of branch gas pipes and gas ducts,the exhaust gas and heat dissipation conditions at the upper part of the cell were adjusted to improve the sealing efficiency of the electrolytic cell and optimize the uniformity of heat balance.The results shows that the measured ventilation deviation of branch pipes for exhaust gas between cells of is optimized from-23%~30%to within±10%,and the gas gathering uniformity deviation in a single cell chamber is optimized from-52%~30%to-7%~5%,which completely solves the problem of dust accumulation and significantly improves the sealing efficiency of electrolytic cells and the working environment;the measured cell temperature deviation between aluminum outlet and flue end is lowered from 6℃to 3℃,the precipitation at the gas duct end is significantly reduced,and the heat balance uniformity of the electrolytic cell is improved.

关 键 词：热平衡 数值模拟 烟道 密闭效率 节能 优化 

分 类 号：TF821[冶金工程—有色金属冶金]