流水线镁电解过程中杂质Fe控制技术  

Behavior of Fe in pipeline magnesium electrolysis process

作　　者：马尚润 朱福兴[1] 李开华[1] MA Shangrun;ZHU Fuxing;LI Kaihua(State Key Laboratory of Vanadium and Titanium Comprehensive Utilization,Pangang Group Research Institute Co.,Ltd.,Panzhihua 617000,Sichuan,P.R.China)

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

出　　处：《重庆大学学报（自然科学版）》2019年第10期73-81,共9页Journal of Chongqing University

基　　金：国际科技交流与合作专项项目(2010DFB73170)~~

摘　　要：采用电化学工作站、气冷阴极和熔盐综合测定仪等装置研究了流水线镁电解过程中杂质Fe的控制技术。结果表明:Fe离子易造成电流损失和镁损失。影响杂质Fe净化的因素有电流密度、电解槽电压、电极材质、反应时间、电解质温度和电解质扰动。杂质Fe的净化率随着槽电压的升高(低于MgCl2分解电压)、电流密度的增加、反应时间的延长而增加;杂质在石墨电极的净化率优于碳钢电极;在电解质温度为725℃±5℃时,杂质Fe的净化率最佳。在工业生产中,通过在槽内安装石墨直流电极,控制石墨电极电压在6~8V等可提高电解槽的净化率。开展工业试验后电解质中的杂质Fe由0.0289%降至0.0091%,净化效果明显提升。The behavior of Fe in pipeline magnesium electrolysis was studied by means of electrochemical workstation,gas-cooled cathode and molten salt comprehensive analyzer.The results show that Fe is liable to cause current loss and magnesium loss.The current density,cell voltage,electrode material,reaction time,electrolyte temperature and electrolyte disturbance are the main factors affecting the purification of Fe.The purifying rate of Fe increases with the increase of cell voltage(lower than the decomposition voltage of MgCl2),current density and reaction time,the purifying rate of Fe at graphite electrode is better than that at carbon steel electrode,and the purifying rate of Fe is the best when the electrolyte temperature is 725℃±5℃.In industrial production,by installing graphite DC electrode in the cell and controlling the voltage of graphite electrode within 6Vto 8V,the purification rate of the cell can be improved.After industrial experiments,the impurity Fe in the electrolyte dropped from 0.0289% to 0.0091%,and the purification effect was obviously improved.

关 键 词：流水线镁电解 净化率 杂质 精炼槽 

分 类 号：TF822[冶金工程—有色金属冶金]