甲基磺酸铅连续电积精铅研究  

Study on Continuous Electrowinning of Lead from Lead Methanesulfonate

作　　者：张壮 谢锋 王伟 祖壮志 ZHANG Zhuang;XIE Feng;WANG Wei;ZU Zhuangzhi(School of Metallurgy,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学冶金学院,沈阳110819

出　　处：《有色金属（冶炼部分）》2025年第1期7-15,共9页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家重点研发计划项目(2019YFC1908303)。

摘　　要：开发了以甲基磺酸铅为电解质的连续旋转电积精铅工艺及装备。通过系统考察电流密度、刮取时间、极间距、蠕动泵流速、甲基磺酸浓度、复溶、Pb^(2+)浓度和温度等因素对电积过程电流效率、平均槽电压及能耗的影响规律,得到了连续电积精铅的优化条件,验证了新型连续电积精铅装备的应用可行性和有效性。结果表明,在电流密度200 A/m^(2)、刮取时间2 h、极距40 mm、蠕动泵流速300 mL/min、甲基磺酸浓度1 mol/L、Pb^(2+)浓度1 mol/L、温度40℃的条件下,可以获得纯度为99.996%、结构紧密且较易刮取的精铅产品,电解过程的电流效率大于97%,平均能耗为659.74 kWh/t。Lead methanesulfonate was utilized as the electrolyte to develop an innovative electrowinning lead process based on continuous electrowinning equipment.Through a systematic investigation of various parameters,including current density,scraping time,electrode spacing,electrolyte circulation speed,concentration of methanesulfonic acid,redissolution,concentration of Pb^(2+),and temperature,on current efficiency,average cell voltage,and energy consumption of continuous electrowinning,the optimal conditions for the electrowinning of refined lead within a lead methanesulfonate solution were identified.Moreover,the feasibility and efficiency of the novel continuous electrowinning equipment have been validated.The results reveal that under conditions of current density of 200 A/m^(2),scraping time of two hours,electrode spacing of 40 mm,electrolyte circulation speed of 300 mL/min,methanesulfonic acid concentration of 1 mol/L,Pb^(2+)concentration of 1 mol/L,and temperature of 40℃,a refined lead of 99.996%purity,featuring a compact structure and ease of scraping,is obtained.The process exhibits a current efficiency exceeding 97%and an energy consumption of 659.74 kWh/t.

关 键 词：甲基磺酸铅 连续旋转电积 精铅 

分 类 号：TF812[冶金工程—有色金属冶金]