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Recovery of valuable metals from Gacun complex copper concentrate by two-stage countercurrent oxygen pressure acid leaching process

Authors
Journal
Minerals Engineering
0892-6875
Publisher
Elsevier
Publication Date
Volume
24
Issue
10
Identifiers
DOI: 10.1016/j.mineng.2011.04.022
Keywords
  • Complex Copper Concentrate
  • Oxygen Pressure Acid Leaching
  • Synthetic Reclaiming
  • Tetrahedrite

Abstract

Abstract Two-stage countercurrent oxygen pressure acid leaching process was developed to recover valuable metals from Gacun complex copper concentrate. It is unusual that tetrahedrite, whose treatment has been rarely studied, is the primary copper mineral of a concentrate. Most of silver also occurs in the mineral. The optimum operating parameters of the first stage and the second stage were established by conditional tests. Pilot scale tests ran smoothly, and the average overall leaching percentages of copper and zinc were as high as 96.2% and 97.5% respectively while the average overall leaching percentages of Fe, As and Sb as impurities were only 8.5%, 6.5% and 0.8%. Pb and Ag were not dissolved and stayed in the second stage leaching residue.

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