Effects of anode slime removing by Fe^(2+)dissolution method on electrochemical properties of Pb−0.6%Ag anode and zinc electrowinning

Fe^(2+)溶蚀法清理阳极泥对Pb-0.6%Ag阳极电化学性能及锌电积的影响(英文)

Fe^(2+)dissolution method and manual method were used to remove the anode slime and their effects on properties of cast Pb−0.6wt.%Ag anode and zinc electrowinning were compared.The results reveal that the Fe^(2+)dissolution method can avoid mechanical damage to the oxide film layer on the anode surface,which cannot be achieved by traditional manual method.This can lower the anode corrosion rate by 57.14%,thus reducing Pb contamination in electrolyte and zinc products.Meanwhile,compared with manual method,Fe^(2+)dissolution method can significantly improve the electrocatalytic activity of the anode and lower the initial power consumption of zinc electrowinning to 2720 kW·h/t after removing anode slime.

对比研究Fe^(2+)溶蚀法和人工法清理阳极泥对铸造Pb-0.6%Ag(质量分数)阳极性能和锌电积的影响。结果表明,Fe^(2+)溶蚀法能避免阳极表面氧化膜层受到机械损伤,而传统人工法无法实现,这将使阳极腐蚀速率降低57.14%,从而减少电解液和锌产品的Pb污染。同时,相较于人工法,Fe^(2+)溶蚀法清理阳极泥可显著提高阳极的电催化活性,使阳极泥清理后的锌电积初始电耗低至2720 kW·h/t。