TY - JOUR 
A1 - Torres Albornoz, David Antonio
AU - Ayala Alcazar, Luis
AU - Jeldres Valenzuela, Ricardo Iván
AU - Cerecedo Sáenz, Eduardo
AU - Salinas Rodríguez, Eleazar
AU - Robles Vásquez, Pedro Adrián
AU - Toro Villarroel, Norman Rodrigo
T1 - Leaching chalcopyrite with High MnO2 and chloride concentrations
Y1 - 2020
SN - 2075-4701
UR - http://hdl.handle.net/10317/9350
AB - Most copper minerals are found as sulfides, with chalcopyrite being the most abundant. However; this ore is refractory to conventional hydrometallurgical methods, so it has been historically exploited through froth flotation, followed by smelting operations. This implies that the processing involves polluting activities, either by the formation of tailings dams and the emission of large amounts of SO2 into the atmosphere. Given the increasing environmental restrictions, it is necessary to consider new processing strategies, which are compatible with the environment, and, if feasible, combine the reuse of industrial waste. In the present research, the dissolution of pure chalcopyrite was studied considering the use of MnO2 and wastewater with a high chloride content. Fine particles (􀀀20 _m) generated an increase in extraction of copper from the mineral. Besides, it was discovered that working at high temperatures (80 _C); the large concentrations of MnO2 become irrelevant. The biggest copper extractions of this work (71%) were achieved when operating at 80 _C; particle size of 􀀀47 + 38 _m, MnO2/CuFeS2 ratio of 5/1, and 1 mol/L of H2SO4.
KW - Dissolution
KW - CuFeS2
KW - Chloride media
KW - Manganese nodules
KW - 5312.09 Minería
LA - eng
PB - MDPI
ER -