TY - GEN
T1 - Leaching of chalcopyrite concentrate with organic ligand compounds
AU - Solis-Marcial, O. J.
AU - Lapidus, G. T.
PY - 2012
Y1 - 2012
N2 - The oxidative dissolution of copper from refractory minerals, such as chalcopyrite, represents a technological challenge that has occupied hydrometallurgists for more than half a century. Innumerable processes have been suggested, but the majority operates at high temperatures or employs corrosive media. The origin of this refractory nature is the formation of passivating phases of iron(III) or copper. One option is to add non-corrosive ligands that complex these metal ions, thereby facilitating their dissolution. In the present work, the effect of acetone in sulfuric acid solutions was studied. The initial experiments were on chalcopyrite carbon paste electrodes using cyclic voltammetry, where greater reactivity was observed. Later, leaching tests with hydrogen peroxide, cupric sulfate and ozone and, as oxidants, were performed. High extractions were achieved in three hours at 50°C. The solid residues contained the iron in the form of Fe2O3 and FeOOH.
AB - The oxidative dissolution of copper from refractory minerals, such as chalcopyrite, represents a technological challenge that has occupied hydrometallurgists for more than half a century. Innumerable processes have been suggested, but the majority operates at high temperatures or employs corrosive media. The origin of this refractory nature is the formation of passivating phases of iron(III) or copper. One option is to add non-corrosive ligands that complex these metal ions, thereby facilitating their dissolution. In the present work, the effect of acetone in sulfuric acid solutions was studied. The initial experiments were on chalcopyrite carbon paste electrodes using cyclic voltammetry, where greater reactivity was observed. Later, leaching tests with hydrogen peroxide, cupric sulfate and ozone and, as oxidants, were performed. High extractions were achieved in three hours at 50°C. The solid residues contained the iron in the form of Fe2O3 and FeOOH.
KW - Acetone
KW - Chalcopyrite
KW - Leaching
UR - http://www.scopus.com/inward/record.url?scp=84860783842&partnerID=8YFLogxK
U2 - 10.1002/9781118364833.ch55
DO - 10.1002/9781118364833.ch55
M3 - Contribución a la conferencia
AN - SCOPUS:84860783842
SN - 9781118291238
T3 - TMS Annual Meeting
SP - 605
EP - 612
BT - T.T. Chen Honorary Symposium on Hydrometallurgy, Electrometallurgy and Materials Characterization - Held During the TMS 2012 Annual Meeting and Exhibition
PB - Minerals, Metals and Materials Society
T2 - T.T. Chen Honorary Symposium on Hydrometallurgy, Electrometallurgy and Materials Characterization - TMS 2012 Annual Meeting and Exhibition
Y2 - 11 March 2012 through 15 March 2012
ER -