Reducing-effect of chloride for the dissolution of black copper
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Torres, David; Pérez, Kevin; Trigueros Tornero, Emilio; Jeldres Valenzuela, Ricardo Iván; Salinas Rodríguez, Eleazar; [et al.]Área de conocimiento
Explotación de MinasPatrocinadores
The authors are grateful for the contribution of the Scientific Equipment Unit-MAINI of the Universidad Católica del Norte for facilitating the chemical analysis of the solutions. Pedro Robles thanks the Pontificia Universidad Católica de Valparaíso for the support provided. Also, we thanks Conicyt Fondecyt 11171036 and Centro CRHIAM Project Conicyt/Fondap/15130015.Realizado en/con
Universidad Católica del Norte de ChileFecha de publicación
2020-01Editorial
MDPICita bibliográfica
Torres, D.; Pérez, K.; Trigueros, E.; I. Jeldres, R.; Salinas-Rodríguez, E.; Robles, P.; Toro, N. Reducing-Effect of Chloride for the Dissolution of Black Copper. Metals 2020, 10, 123. https://doi.org/10.3390/met10010123Revisión por pares
siPalabras clave
agglomeratecopper pitch
copper wad
curing
pre-treatment
Resumen
Oxidized black copper ores are known for their difficulty in dissolving their components of
interest through conventional methods. This is due to its non-crystalline and amorphous structure.
Among these minerals, copper pitch and copper wad are of great interest because of their considerable
concentrations of copper and manganese. Currently, these minerals are not incorporated into the
extraction circuits or left untreated, whether in stock, leach pads, or waste. For the recovery of its
main elements of interest (Cu and Mn), it is necessary to use reducing agents that dissolve the present
MnO2, while allowing the recovery of Cu. In this research, the results for the dissolution of Mn and
Cu from a black copper mineral are exposed, evaluating the reducing effect of NaCl for MnO2 through
pre-treatment of agglomerate and curing, and subsequently leaching in standard condition with
the use of a reducing agent (Fe2+). High concentrations of chloride in the agglomerate process and
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