用离子膜电解槽无硒电沉积金属锰  

Non-selenium Electrodeposition of Metal Manganese Using Ion Membrane Electrolyzer

作　　者：冯雅丽[1] 杜云龙[1] 李辉[1] 周宇照[2] 王维大[1] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]中国科学院过程工程研究所生化工程国家重点实验室,北京100190

出　　处：《湿法冶金》2014年第3期203-207,共5页Hydrometallurgy of China

基　　金：国家自然科学基金资助项目(No.21176026;21176242);国家863计划项目(No.2012AA062401);中国大洋矿产资源研究开发计划项目(No.DY125-15-T-08)

摘　　要：研究了用阴离子膜电解槽在硫酸盐体系中无硒电解金属锰,采用循环伏安法研究了阴极电化学机制。单因素条件试验确定的最佳电解条件为:锰离子质量浓度30g/L,硫酸铵质量浓度135g/L,电解温度35℃,阴极液pH=7.7,电流密度450A/m2,SO2添加量为0.4g/L。最佳条件下,电解效率达到82%,直流电耗为4 985kWh·t-1,电解产品为α-Mn,质量符合国家标准。阴离子交换膜可以减弱阴极浓差极化,有效区分锰沉积峰和析氢还原峰;SO2添加剂可显著抑制析氢反应,降低锰沉积电流,减小直流电耗。The non-selenium electrodeposition of metal manganese from sulphate-based electrolytic solution using ion membrane reactor was investigated ,and the catholic electrochemical behaviour was tested by cyclic voltammetry .The optimum electrolysis conditions through single factor experiments were found as follows ：manganese ion concentration is 30 g/L ,ammonium sulfate concentration is 135 g/L ,temperature is 35 ℃ ,pH is 7 .7 ,current density is 450 A/m^2 and SO2 concentration is 0 .4 g/L . Under these conditions ,the current efficiency can be up to 82% ,the DC power consumption can be reduced to 4 985 kWh/t .Manganese phase is α-Mn ,and the product quality meets national standards . Anion-exchange membrane can reduce cathode concentration polarization and distinguish effectively manganese electro-deposition peak from hydrogen evolution reduction peak .SO2 additive can suppress hydrogen reduction reaction and reduce manganese electro-deposition current ,thereby decrease DC power consumption .

关 键 词：离子膜电解槽 无硒 电解 锰 

分 类 号：TF792[冶金工程—钢铁冶金]