The dissolution of chalcopyrite in chloride media

Authors

  • T. Ibáñez Departamento de Ingeniería Metalúrgica, Universidad Católica del Norte
  • L. Velásquez Departamento de Ingeniería Metalúrgica, Universidad Católica del Norte

DOI:

https://doi.org/10.3989/revmetalm.1217

Keywords:

Dissolution of chalcopyrite, Chloride media, Solution potential, Catalysts additives, MnO2, Pyrite, Silver ions

Abstract


The aim of this investigation is to determinate the effects of parameters and additives on the kinetics of dissolution of chalcopyrite on moderated conditions by means of dissolutions test with chalcopyrite concentrate and pure chalcopyrite in shake flasks and instrumented stirred reactors. A study of the dissolution of chalcopyrite in chloride solutions has demonstrated that the rate of dissolution of chalcopyrite is strongly dependent on the potential of the solution within a range of 540 to 630 mV (versus SHE). Leaching at pH around 2.5 results in increased rates of copper dissolution suggesting the possibility to keep the solution potential within the range. Both pyrite and silver ions enhance the dissolution of chalcopyrite and this effect increases when both species are present. The MnO2 has a negative effect on the dissolution increasing the solution potential to values where the rate decreases considerably.

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References

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Published

2013-04-30

How to Cite

Ibáñez, T., & Velásquez, L. (2013). The dissolution of chalcopyrite in chloride media. Revista De Metalurgia, 49(2), 131–144. https://doi.org/10.3989/revmetalm.1217

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