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| Study on the leaching behavior of zinc and copper during the oxygen pressure leaching process of copper-containing zinc sulfide concentrate |
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Received:March 30, 2025
Revised:March 30, 2025
Accepted:April 10, 2025
Published Online:April 30, 2026
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| DOI：10.3969/j.issn.1005-7854.2025.06.018 |
| KeyWord:zinc sulfide concentrate;oxygen pressure leaching;zinc leaching rate;copper leaching rate |
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| 1.Yunnan Chihong Zinc and Germanium Co. Ltd., Qujing 655000, Yunnan, China;2.School of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China;3.Hulunbeier Chihong Mining Co. Ltd., Hulunbeier 021000, Inner Mongolia, China |
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| Abstract: |
| A study was conducted on the leaching behavior of zinc and copper during the oxygen pressure leaching process of copper-containing zinc sulfide concentrate. The effects of stirring speed, reaction temperature, sulfuric acid concentration, oxygen partial pressure, time, and liquid-to-solid ratio on the leaching of zinc and copper were investigated. The results showed that zinc in the concentrate mainly exists as marmatite, while copper primarily exists as chalcopyrite. Increasing temperature, sulfuric acid concentration, and oxygen partial pressure enhanced the leaching rates of zinc and copper. Under the same conditions, the leaching rate of zinc was higher than that of copper. The leaching rate of zinc reached over 98% within 120 minutes, while the leaching rate of copper exceeded 90% after 180 minutes. Under optimized conditions—reaction temperature of 150 ℃, sulfuric acid concentration of 120 g·L?1, oxygen partial pressure of 0.6 MPa, time of 180 minutes, and liquid-to-solid ratio of 8∶1—the leaching rate of zinc exceeded 99%, and that of copper reached 91.1%. The main phases in the leaching residue were elemental sulfur, lead sulfate, and silicon dioxide. |
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