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Article

Effect of Pre-Treatment with Sodium Chloride/Sulfuric Acid on the Bornite Concentrate Leaching in Chloride Medium

1
Departamento de Ingeniería Metalúrgica, Facultad de Ingeniería, Universidad de Santiago de Chile, Avda. Libertador Bernardo O’Higgins 3363, Santiago 8320000, Chile
2
Departamento de Ingeniería en Metalurgia, Universidad de Atacama, Copiapó 1531772, Chile
*
Author to whom correspondence should be addressed.
Metals 2020, 10(12), 1674; https://doi.org/10.3390/met10121674
Received: 9 November 2020 / Revised: 6 December 2020 / Accepted: 11 December 2020 / Published: 14 December 2020
In this work, the effect of the pre-treatment of bornite concentrate with a sodium chloride–sulfuric acid mixture prior to leaching with chloride solutions was evaluated. The influence of the dosage of NaCl and the resting time in the copper solution was evaluated. The solid residues of the pre-treatment were characterized by XRD to evaluate the changes that took place in the bornite. The experimental results show that as the sitting time and the amount of sodium chloride added are increased, the dissolution of the sulfide species also increased. The pre-treatment affects Cu preferentially because it has greater mobility than iron in the bornite crystal lattice. The pre-treatment promotes the formation of soluble Cu and Fe species. The efficiency of the pre-treatment depends largely on the formation of hydrochloric acid in the mixture at the particle level, due to the ease with which it diffuses through the bornite particles, achieving greater penetration of the pre-treatment. View Full-Text
Keywords: copper concentrate; bornite; pre-treatment; acid leaching; chloride copper concentrate; bornite; pre-treatment; acid leaching; chloride
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MDPI and ACS Style

Navarro, P.; Vargas, C.; Bahamonde, F.; Gómez, M.; Espinoza, D.; Sepúlveda, R.; Castillo, J. Effect of Pre-Treatment with Sodium Chloride/Sulfuric Acid on the Bornite Concentrate Leaching in Chloride Medium. Metals 2020, 10, 1674. https://doi.org/10.3390/met10121674

AMA Style

Navarro P, Vargas C, Bahamonde F, Gómez M, Espinoza D, Sepúlveda R, Castillo J. Effect of Pre-Treatment with Sodium Chloride/Sulfuric Acid on the Bornite Concentrate Leaching in Chloride Medium. Metals. 2020; 10(12):1674. https://doi.org/10.3390/met10121674

Chicago/Turabian Style

Navarro, Patricio, Cristian Vargas, Fabiana Bahamonde, Matías Gómez, Daniel Espinoza, Rossana Sepúlveda, and Jonathan Castillo. 2020. "Effect of Pre-Treatment with Sodium Chloride/Sulfuric Acid on the Bornite Concentrate Leaching in Chloride Medium" Metals 10, no. 12: 1674. https://doi.org/10.3390/met10121674

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