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Minerals 2018, 8(8), 312;

Leaching of Primary Copper Sulfide Ore in Chloride-Ferrous Media

Departamento de Ingeniería Química y Procesos de Minerales, Universidad de Antofagasta, Antofagasta 1240000, Chile
Departamento Ingeniería de Minas, Universidad de Antofagasta, Antofagasta 1240000, Chile
Departamento de Ingeniería en Metalurgia y Minas, Universidad Católica del Norte, Antofagasta 1240000, Chile
Author to whom correspondence should be addressed.
Received: 28 June 2018 / Revised: 20 July 2018 / Accepted: 23 July 2018 / Published: 25 July 2018
(This article belongs to the Special Issue Recent Advances in Hydro- and Biohydrometallurgy)
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Copper extraction from primary copper sulfide ore from a typical porphyry copper deposit from Antofagasta, Chile, was investigated after leaching with a chloride-ferrous media at two temperatures. The study focused on whether this chemical leaching system could be applied at an industrial scale. Leaching tests were conducted in columns loaded with approximately 50 kg of agglomerated ore; the ore was first cured for 14 days and then leached for 90 days. The highest copper extraction, 50.23%, was achieved at 32.9 °C with the addition of 0.6 kg of H2SO4 per ton of ore, 0.525 kg of NaCl per ton of ore, and 0.5 kg of FeSO4 per ton of ore. In respect to copper extraction, the most effective variables were temperature and the addition of NaCl. View Full-Text
Keywords: leaching; primary sulfide copper; chalcopyrite; chloride leaching; primary sulfide copper; chalcopyrite; chloride

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Salinas, K.E.; Herreros, O.; Torres, C.M. Leaching of Primary Copper Sulfide Ore in Chloride-Ferrous Media. Minerals 2018, 8, 312.

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