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| Study on Applicability and Mechanism of One-step Purification Process by Antimony-activated in Zinc Hydrometallurgy |
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Received:May 30, 2024
Revised:June 04, 2024
Accepted:June 05, 2024
Published Online:August 08, 2024
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| DOI：doi：10.3969/j.issn.1007-7545.2024.09.007 |
| KeyWord:zinc hydrometallurgy; antimony-activated purification; one-step purification; purification mechanism; applicability |
| Author | Institution |
| JIAO Guanghui |
中南大学 冶金与环境学院 |
| LIU Zhiyong |
中南大学 冶金与环境学院 |
| LIU Zhihong |
中南大学 冶金与环境学院 |
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| Abstract: |
| With the raw materials of zinc hydrometallurgy becoming more and more complicated, the fluctuation of impurities in zinc leaching solution is intensified, and the purification process is facing new challenges. The research on the applicability of one-step purification process activated by antimony is urgent. It is found that the suitable pre-purification solution is as follows: the concentration of Zn2+ is not higher than 160 g/L, the concentration of Cu2+ is not higher than 72 mg/L, the concentration of Co2+ is not higher than 15 mg/L, and the concentration of Cd2+ is not higher than 837 mg/L. The purification mechanism is as follows: when the surface of zinc powder is dissolved, Cd, Sb, Co and Cu form flocculent precipitation on the surface of zinc powder; with the continuous dissolution of zinc powder, the flocculent precipitate extends inward, but the extension speed of flocculent precipitate is slower than dissolution of zinc powder, and holes appear in the agglomerates of flocculent precipitate. When the zinc powder is completely dissolved, the flocculent precipitate further extends to form aggregates rich in pores and encapsulated by basic zinc sulfate. |
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