Study on Behavior of Impurity Antimony in Zinc Electrowinning

Xiao Hua Yu; Yong Gang Li; Gang Xie; Ying Lu; Kun Wang Ji; Zhe Shi

doi:10.4028/www.scientific.net/AMR.287-290.2957

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Study on Behavior of Impurity Antimony in Zinc Electrowinning

Abstract:

By means of an electrochemical study, the influence of Sb³⁺ on cathode polarization process in zinc electrowinning and its kinetics equation and parameters have been studied. The results show that antimony has a depolarization function in the presence of [Sb³⁺] ≥0.5 mg·L–1 in zinc electrowinning, and Sb³⁺has a polarization function in zinc electrowinning in the presence of [Sb³⁺] ≥1 mg·L^–1, the polarization curve enters into the hydrogen evolution range from the activation range, which indicates that the presence of antimony has adverse influence on the zinc electrowinning process.