Development of an empirical model for copper extraction from chalcocite in chloride media

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Manuel Saldaña
Freddy Rodríguez
Anyelo Rojas
Kevin Pérez
Hugo Javier Angulo Palma


Multivariate models are a useful tool when studying the effects of independent variables on one or more dependent variables, since this approach allows modeling of the dynamics of complex systems based on simple analytical models with considerable certainty. Due to the decrease in the copper oxide mineral grades, leaching of copper sulfide minerals (secondary sulfides) has positioned itself as a benchmark of operation for the Chilean mining industry. The present work proposes the study of the effects of sulfuric acid, chloride concentration and time on the extraction of copper from sulfuric minerals (chalcocite), considering an experimental design, the surface optimization methodology and the adjustment of a quadratic model. The experimental data were adjusted by multiple regression analysis and were statistically analyzed. A model was developed to represent the copper extraction from the Cu2S mineral as a function of the statistically significant variables (chloride concentration and time) that contribute to explain the variation of the response variable under the set of parameters sampled.


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Saldaña, M., Rodríguez, F., Rojas, A., Pérez, K., & Angulo Palma, H. J. (2020). Development of an empirical model for copper extraction from chalcocite in chloride media. HEMIJSKA INDUSTRIJA (Chemical Industry), 74(5), 285–292.
Chemical Engineering - General
Author Biographies

Manuel Saldaña, Facultad de Ingeniería y Arquitectura, Universidad Arturo Prat, Antofagasta 1244260, Chile and Departamento de Ingeniería Metalúrgica y Minas, Facultad de Ingeniería y Ciencias Geológicas, Universidad Católica del Norte, Antofagasta 1270709, Chile

Facultad de Ingeniería y Arquitectura

Freddy Rodríguez, Departamento de Ingeniería Metalúrgica y Minas, Facultad de Ingeniería y Ciencias Geológicas, Universidad Católica del Norte, Antofagasta 1270709, Chile

Departamento de Ingeniería Metalúrgica y Minas, Facultad de Ingeniería y Arquitectura

Anyelo Rojas, Departamento de Ingeniería Metalúrgica y Minas, Facultad de Ingeniería y Ciencias Geológicas, Universidad Católica del Norte, Antofagasta 1270709, Chile

Departamento de Ingeniería Metalúrgica y Minas, Facultad de Ingeniería y Arquitectura

Kevin Pérez, Departamento de Ingeniería Química y Procesos de Minerales, Facultad de Ingeniería, Universidad de Antofagasta, Antofagasta 1270300, Chile

Departamento de Ingeniería Química y Procesos de Minerales, Facultad de Ingeniería

Hugo Javier Angulo Palma, Centro de Investigaciones del Níquel (CEDINIQ), Moa, Holguín, Cuba and Departamento de Metalurgia y Materiales, Universidad de Moa, Holguín, Cuba

Departamento de Metalurgia y Materiales, Universidad de Moa


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