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| Effects of Nickel Electrolysis Process Conditions on Cathode Precipitation Behavior of Impurity Element Pb, Zn and Se |
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Received:April 27, 2022
Revised:May 06, 2022
Accepted:May 11, 2022
Published Online:September 16, 2022
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| DOI：doi：10.3969/j.issn.1007-7545.2022.10.006 |
| KeyWord:nickel electrolysis; electrochemistry; cyclic voltammetry curve; cathode polarization curve |
| Author | Institution |
| WANG Fu |
金川集团股份有限公司 |
| FENG Jian-hua |
金川集团股份有限公司 |
| LU Xiao-feng |
中国科学院兰州化学物理研究所 |
| LI Yi-jing |
中国科学院兰州化学物理研究所 |
| GUO Yong |
中国科学院兰州化学物理研究所 |
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| Abstract: |
| Electrochemical behavior of lead, zinc, sulfur and selenium impurities in nickel electrolyte in nickel electrorefining was studied by cyclic voltammetry. The results show that lead and zinc are reduced to metallic elements at the cathode, while sulfur and selenium form NixSy and NixSey with nickel ions. The cathodic polarization method was used to study the influence of electrolysis process conditions such as temperature, pH value and chloride ion concentration on reduction potential of impurities Pb, Zn, S and Se. In industrial production, electrolytic conditions can be adjusted according to the needs of impurity control so as to reduce total amount of some impurity elements precipitated in cathode. |
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