阳极开孔形状对金属锰电沉积行为的影响及数值模拟  

Numerical simulation and experimental study on behavior of anode with different opening shapes in manganese electrowinning

作　　者：郭岚峰[1,2] 刘仁龙[1,2] 刘作华[1,2] 舒建成[1,2] 张兴然[1,2] 陶长元[1,2] GUO Lanfeng;LIU Renlong;LIU Zuohua;SHU Jiancheng;ZHANG Xingran;TAO Changyuan(School of Chemistry and Chemical Engineering,Chongqing University,Chongqing 400044,China;Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization,Chongqing 400044,China)

机构地区：[1]重庆大学化学化工学院,重庆400044 [2]洁净能源与特色资源化工过程重庆市重点实验室,重庆400044

出　　处：《化工进展》2017年第7期2584-2591,共8页Chemical Industry and Engineering Progress

基　　金：国家科技支撑计划(2015BAB17B00);广西科技厅千亿元产业关键共性技术科技攻关计划(2014BA10016)项目

摘　　要：电沉积锰过程中阳极的结构直接影响电解槽内电场分布以及电沉积过程能耗。采用实验与数值模拟相结合的手段,分析阴极金属锰和阳极泥的微观形貌、电流效率以及电解槽内电场分布,研究阳极板开孔形状对电沉积锰过程的影响规律。对电解槽进行了三维建模与数值模拟,并通过在线测定阴极过电位实验对模拟结果进行了验证。实验结果表明:在相同开孔面积的条件下,圆孔比方孔和整块矩形孔的电解性能要好。圆孔阳极板在电解过程中阴极过电位的值最小为–1.609V,获得的最大电流效率74.54%,最低单位能耗降5506k W·h/t,而且金属锰表面更加平整致密。模拟结果表明:模拟结果和实验结果具有良好的一致性,圆孔阳极板在电解过程中电解槽内电场分布均匀、合理,在阴极板水平与垂直方向上均获得最小过电位值–1.5989V。In the process of manganese electrowinning,the structure of anode directly affects theenergy consumption and the distribution of electric field in the electrolytic cell.By means ofexperiment and simulation,the morphology,current efficiency,and electric field distribution ofcathode manganese and anode slime were analyzed,and the effects of anode with different openingshapes on the process of electrowinning manganese were investigated.Three-dimensional modelingand numerical simulation of the electrolytic cell were developed,and the simulation results wereverified by the on-line measurement of cathodic over-potential.The experimental results show that,under the premise of the same porosity and electrolysis condition,the anode plate with circle openingshad better performance than the plate with square or rectangular openings.The anode plate with circleopenings could obtain maximum current efficiency of74.54%,and per-unit energy consumption can bereduced to5506kW·h/t,while the surface of metal manganese is more smooth and compact.Thesimulation results show good agreement with experimental results.With the anode plate ofcircle openings,the electric field distribution in the electrolytic cell is uniform and reasonable,and the minimum value of–1.5989V is obtained in the horizontal and vertical direction of the cathode plate.

关 键 词：阳极板 孔形状 电沉积锰 数值模拟 

分 类 号：TF803.27[冶金工程—有色金属冶金]