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Effect of Pretreatment on Leaching Primary Copper Sulfide in Acid-Chloride Media

Cecilia P. Cerda, María E. Taboada

2017eschalcopyritechlorideleachingpretreatmentseawatercopperhydrometallurgy

Abstract

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The aim of this study was to improve the dissolution of copper sulfide ore composed mainly of chalcopyrite (1.21 wt %) and bornite (0.54 wt %) using a pretreatment before leaching. The effect of the pretreatment on copper sulfide dissolution was investigated using different types of leaching. Three sets of experimental tests were performed (flask, reactor and mini-column). Using experimental design, three operational variables in the ore pretreatment were evaluated: chloride concentration (20, 50 and 90 kg/t), repose time (7, 20 and 40 days) and repose temperature (20 and 50 ◦C). A maximum of 93% copper dissolution was obtained when the ore was treated with 90 kg Cl −/t ore, 40 d of repose time and 50 ◦C in flask leaching. Without any ore pretreatment, 53% copper dissolution was achieved. Using reactor leaching, an 85% copper dissolution was obtained using pretreatment stage. Without this pretreatment, only 55% copper dissolution was obtained. The final test, which involved leaching a pretreated ore in a mini-column at room temperature, yielded 49% copper dissolution. The data showed that repose time and temperature were the most important variables affecting copper extraction in the pretreatment stage. This study indicates that pretreatment has a positive effect on copper dissolution from primary copper sulfide ore in an acid-chloride medium.

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Cite This Work

@article{49d6d388-f5fe-44f2-982f-3c5e44141fbe,
  title={Effect of Pretreatment on Leaching Primary Copper Sulfide in Acid-Chloride Media},
  author={Cecilia P. Cerda and María E. Taboada},
  year={2017},
  language={es}
}
TY  - JOUR
TI  - Effect of Pretreatment on Leaching Primary Copper Sulfide in Acid-Chloride Media
AU  - Cecilia P. Cerda
AU  - María E. Taboada
PY  - 2017
LA  - es
ER  -

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