Reducing-effect of chloride for the dissolution of black copper
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AuthorTorres Albornoz, David Antonio; Pérez Salinas, Kevin; Trigueros Tornero, Emilio; Jeldres Valenzuela, Ricardo Iván; Salinas Rodíguez, Eleazar; [et al.]
Knowledge AreaExplotación de Minas
Bibliographic CitationTorres, 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/met10010123
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 e↵ect 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 prolonged ...
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