电解残渣对镁电解的影响  

Effects of electrolysis residue on magnesium electrolysis process

作　　者：朱福兴[1] 马尚润 张瑶[1] 穆天柱[1] 郑权[1] 董江林 

机构地区：[1]攀钢集团研究院有限公司钒钛资源综合利用国家重点实验室,四川攀枝花617000 [2]攀钢集团钛业有限责任公司,四川攀枝花617000

出　　处：《有色金属科学与工程》2015年第5期27-31,共5页Nonferrous Metals Science and Engineering

基　　金：国际科技交流与合作专项(2010DFB73170)

摘　　要：通过测定不同电解残渣添加量对电解电流电压曲线和对液镁汇集现象的影响研究,探讨电解残渣对镁电解系统的影响.结果表明:电解残渣严重影响液镁的汇集,且易吸附金属镁使其自身导电,故随电解残渣量的增加,电解过程中出现电子导电、电极电流分布不均匀和电解槽电压迅速降低等现象;电解残渣使阴极镁汇集变差,出现鱼鳞子镁现象,其主要原因是电解残渣吸附在阴极表面,造成湿润角减小;当电解残渣量小于6%时,其对电流效率的影响主要表现是吸附镁损失,而当其量大于6%时,将会出现电极电子短路现象造成电流效率降低,而通过原料净化和保护气氛电解2种方式可降低电解残渣的产生.The influences of electrolysis residue feeding on the electrolytic current voltage curve and liquid magnesium pooling phenomenon were studied. The results show that the collect of the liquid magnesium is severely affected by the electrolysis residual, which produces electric conduction substance due to adsorption magnesium. With the increased electrolysis residual, phenomena of electric conduction, unequal electrode current and rapidly declining voltages are observed in the electrolysis system. Electrolysis residue causes the worsening aggregation of the liquid magnesium and produces magnesium particle with decreased moist angle for the cathode surface is covered by electrolysis residual. Magnesium adsorbed by electrolysis residual is the main reason for the declining current efficiency at residual content below 6 %. The current efficiency is reduced by the electronic short circuit between anode and cathode at residual content over 6 %. Refining electrolyte and electrolyzing by protection atmosphere can effectively reduce the residue production.

关 键 词：电解残渣 镁电解 形貌特征 电流效率 

分 类 号：TF822[冶金工程—有色金属冶金]