锌电积用Pb-Ag-Sb-Ca四元合金阳极的电化学性能研究  

Electrochemical Behaviors of Pb-Ag-Sb-Ca Quaternary Alloy Anode for Zinc Electrowinning

作　　者：杨海涛[1] 刘焕荣[2] 张永春[1] 陈步明[1] 郭忠诚[1,3] 

机构地区：[1]昆明理工大学冶金与能源工程学院,昆明650093 [2]昆明理工大学国土资源工程学院,昆明650093 [3]昆明理工恒达科技有限公司,昆明650106

出　　处：《昆明理工大学学报（自然科学版）》2013年第2期7-11,共5页Journal of Kunming University of Science and Technology(Natural Science)

基　　金：国家自然科学基金(51004056);云南省应用基础研究基金(2010ZC052);昆明理工大学分析测试基金(2011173)

摘　　要：实验通过恒电流极化(24 h)、阳极极化曲线等技术在酸性硫酸锌溶液中测试了Pb-0.3%Ag-0.6%Sb-0.06%Ca四元合金阳极的电化学性能,并分析了其析氧动力学参数.结果表明:相对于传统的Pb-0.3%Ag-0.06%Ca阳极,Pb-0.3%Ag-0.6%Sb-0.06%Ca四元合金阳极析氧过电位低27 mV(500 A/m2);电极表观交换电流密度增高将近一倍.元素Sb明显的提高了Pb-0.3%Ag-0.06%Ca阳极的电催化活性,有利于析氧反应的发生和槽电压的降低,节约电能消耗,是很好的锌电积阳极改性剂,具有较好的工业应用前景.In this paper, oxygen evolution kinetics and electrochemical behaviour of Pb -0.3% Ag - 0.6% Sb - 0.06% Ca quaternary alloy anode during the 24 hours galvanostatic electrolysis in acid zinc sulphate electrolyte so- lution is investigated with anodic polarization curves. Compared with industrial Pb-0.3% Ag-0.06% Ca anodes, the overpotential of oxygen evolution of Pb -0.3%Ag- 0.6% Sb -0.06% Ca is 27 mV lower at 500 A/m2, and the electrode surface exchange current density is about two times higher in value than the ones for Pb -0.3% Ag - 0.06% Ca anodes. For Pb - 0.3% Ag - 0.06% Ca anode, Sb addition obviously improves the electrocatalytic activi- ty, benefits oxygen evolution reaction as well as reduces cell voltage and power consumption. Therefore, Sb is a good modifier for zinc electrowinning anode with a ~ood industry nnnli,-m;

关 键 词：Pb—Ag—Sb—Ca合金阳极 析氧动力学 阳极极化曲线 锌电积 

分 类 号：TF813[冶金工程—有色金属冶金]