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Effect of pH on chalcopyrite leaching with phosphate for copper recovery

D. Calla‑Choque, N. A. Trejo‑Hernández

2008enchalcopyritecopperleachinghydrometallurgy

Abstract

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Chalcopyrite is one of the most abundant copper minerals found in the Earth’s crust, typically processed through pyrometallurgical methods. This study investigates the effect of pH on copper leaching in a PO4 3−–H2O2 system, addressing the challenges posed by the high chemical stability of chalcopyrite. The results demonstrate that copper recovery is strongly dependent on both pH and H2O2 concentration. Specifically, at a pH of 3, increasing the H2O2 concentration to 0.5 M significantly enhances the kinetics of chalcopyrite oxidation at low solid-to-liquid (S/L) ratios (20–50 g/L), resulting in rapid and efficient copper recovery exceeding 90%. However, at higher S/L ratios (100–200 g/L), both the kinetics and overall efficiency decrease. Additionally, iron dissolution remained below 3%, with phosphate effectively enhancing copper recovery while minimizing iron solubility. These findings indicate a promising avenue for improving copper extraction processes from chalcopyrite using hydrometallurgical methods.

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Cite This Work

@article{cc257b8c-e835-4562-8ba1-94623e0e6834,
  title={Effect of pH on chalcopyrite leaching with phosphate for copper recovery},
  author={D. Calla‑Choque and N. A. Trejo‑Hernández},
  year={2008},
  language={en}
}
TY  - JOUR
TI  - Effect of pH on chalcopyrite leaching with phosphate for copper recovery
AU  - D. Calla‑Choque
AU  - N. A. Trejo‑Hernández
PY  - 2008
LA  - en
ER  -

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