Leaching chalcopyrite concentrate with oxygen and sulfuric acid using a low-pressure reactor

Título traducido de la contribución: Lixiviacion de un concentrado de calcopirita con acido sulfurico y oxigeno utilizando un reactor a baja presion

J. Cháidez, J. Parga, Jesus L Valenzuela, Raul Carrillo, I. Almaguer

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

7 Citas (Scopus)

Resumen

This article presents a copper leaching process from chalcopyrite concentrates using a low-pressure reactor. The experiments were carried out in a 30 L batch reactor at an oxygen pressure of 1 kg/cm2 and solid concentration of 100 g/L. The temperature, particle size and initial acid concentration were varied based on a Taguchi L9 experimental design. The initial and final samples of the study were characterized by chemical analysis, X-ray diffraction and particle size distribution. The mass balance showed that 98% of copper was extracted from the chalcopyrite concentrate in 3 h under the following experimental conditions: 130 g/L of initial sulfuric acid concentration, temperature of 100 °C, oxygen pressure of 1 kg/cm2, solid concentration of 100 g/L and particle size of −105 + 75 μm. The ANOVA demonstrated that temperature had the greatest influence on copper extraction. The activation energy was 61.93 kJ/mol. The best fit to a linear correlation was the chemical reaction equation that controls the kinetics for the leaching copper from chalcopyrite. The images obtained by SEM showed evidence of shrinking in the core model with the formation of a porous elemental sulfur product layer.
Título traducido de la contribuciónLixiviacion de un concentrado de calcopirita con acido sulfurico y oxigeno utilizando un reactor a baja presion
Idioma originalInglés
Número de artículo9-189
Páginas (desde-hasta)1-19
Número de páginas19
PublicaciónMDPI Metals
DOI
EstadoPublicada - 2019

Palabras clave

  • hydrometallurgical process
  • chalcopyrite
  • low pressure leaching
  • Kinetics

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