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| Atmospheric oxygen leaching of germanium-bearing zinc oxide dust |
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Received:August 14, 2019
Revised:August 23, 2019
Accepted:August 26, 2019
Published Online:May 14, 2020
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| DOI： |
| KeyWord:germanium; zinc oxide dust; atmospheric oxygen leaching; neutralizing; reduction |
| Author | Institution |
| DENG Zhi-gan |
Kunming University of Science and Technology |
| ZHU Ying-Xu |
Kunming University of Science and Technology |
| WEI Chang |
Kunming University of Science and Technology |
| LI Yanlin |
Yunnan Chihong Zn Ge Co Ltd |
| ZHANG Mei |
Yunnan Chihong Zn Ge Co Ltd |
| ZHAO Wenli |
Kunming University of Science and Technology |
| LI Xing-bin |
Kunming University of Science and Technology |
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| Abstract: |
| This research subject is the leaching of zinc, germanium in the process of zinc hydrometallurgy . The raw material is germanium-bearing zinc oxide dust, which were analyzed by XRD and SEM-EDS, and indicating the dust besides containing zinc oxide, still contain a litter of zinc sulfide and lead sulfide. Some zinc sulfide zinc oxide mixture to dense granules. The effect of the copper ion concentration, time, liquid-solid ratio, temperature, oxygen pressure on the leaching of zinc and germanium were studied. The results shown that under the condition of atmospheric oxygen leaching, when the temperature is 90℃, the liquid-solid ratio is 7ml/g, and the whole process is leached for 4 h by two stage leaching, zinc and germanium leaching efficiency can reach above 90%. The XRD phase identification indicate the main phase of residue is lead sulfate and zinc oxide. Neutralizing and reduction process were to deal with the leaching solution of germanium. In the process, control solution pH in 3.0~3.5 and reaction for 1h, the concentration of Fe3+ can reduce within 0.02g/L, and the germanium did not hydrolysis, which is beneficial to the efficient separation of germanium in the subsequent solution. |
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