TY - JOUR 
A1 - Torres Albornoz, David Antonio
AU - Pérez Salinas, Kevin
AU - Trigueros Tornero, Emilio
AU - Jeldres Valenzuela, Ricardo Iván
AU - Salinas Rodíguez, Eleazar
AU - Robles Vásquez, Pedro Adrián
AU - Toro Villarroel, Norman Rodrigo
T1 - Reducing-effect of chloride for the dissolution of black copper
Y1 - 2020
SN - 2075-4701
UR - http://hdl.handle.net/10317/9351
AB - 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 curing times would favor the reduction of MnO2, increasing the dissolution of Mn, while the addition of NaCl did not benefit Cu extractions. Under standard conditions, low Mn extractions were obtained, while in an acid-reducing medium, a significant dissolution of MnO2 was achieved, which supports the removal of Cu.
KW - Explotación de Minas
KW - Agglomerate
KW - Copper pitch
KW - Copper wad
KW - Curing
KW - Pre-treatment
KW - 5312.09 Minería
KW - 2506.10 Yacimientos Minerales
LA - eng
PB - MDPI
ER -