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

Fupeng Liu*, Zhihong Liu, Yuhu Li, Benjamin P. Wilson, Mari Lundstrom

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)
46 Downloads (Pure)

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.

Original languageEnglish
Pages (from-to)1047-1060
Number of pages14
JournalPhysicochemical Problems of Mineral Processing
Volume53
Issue number2
DOIs
Publication statusPublished - 2017
MoE publication typeA1 Journal article-refereed

Keywords

  • Gallium
  • Germanium
  • Oxygen pressure leaching
  • Pyrite
  • Zinc sulfide concentrate

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