Behavior of gallium and germanium associated with zinc sulfide concentrate in oxygen pressure leaching

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2017
Major/Subject
Mcode
Degree programme
Language
en
Pages
14
1047-1060
Series
Physicochemical Problems of Mineral Processing, Volume 53, issue 2
Abstract
The Fankou zinc concentrate (Guangdong province, China) was mineralogically characterized and results showed that the main germanium-bearing minerals in the sample comprised of zinc sulfide and galena, whereas gallium-bearing minerals were pyrite, sphalerite and silicate. Oxygen pressure leaching of zinc sulfide concentrate was carried out in order to investigate the effect of pressure, leaching time, sulfuric acid and copper concentrations on the leaching behavior of gallium and germanium. Under optimum conditions, leaching of Zn, Fe, Ge and Ga reached 98.21, 90.45, 97.45 and 96.65%, respectively. In the leach residues, it was determined that some new precipitates, such as PbSO4, CaSO4 and SiO2, were formed, which co-precipitated a certain amount of Ga and Ge from the leach solution. The results clearly indicated that Ga and Ge were much more difficult to leach than Zn, and provided answers to why the leaching efficiency of Ga is 10% lower when compared to Ge.
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Keywords
Gallium, Germanium, Oxygen pressure leaching, Pyrite, Zinc sulfide concentrate
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Citation
Liu , F , Liu , Z , Li , Y , Wilson , B P & Lundstrom , M 2017 , ' Behavior of gallium and germanium associated with zinc sulfide concentrate in oxygen pressure leaching ' , Physicochemical Problems of Mineral Processing , vol. 53 , no. 2 , pp. 1047-1060 . https://doi.org/10.5277/ppmp170229