TY - JOUR
T1 - Selective leaching of lead from a lead-silver-zinc concentrate with hydrogen peroxide in citrate solutions
AU - Zárate-Gutiérrez, R.
AU - Gregorio-Vázquez, L.
AU - Lapidus, G. T.
N1 - Publisher Copyright:
© 2015 Canadian Institute of Mining, Metallurgy and Petroleum.
PY - 2015/7
Y1 - 2015/7
N2 - Selective leaching of lead from a Pb-Ag-Zn concentrate with hydrogen peroxide in citrate solutions was studied at room temperature. Leaching tests were performed, varying the H2O2 concentration and the solid-liquid ratio, holding the solution pH constant at 7 and the citrate concentration at 1M. Lead extractions of 100%were achieved with four and five times the stoichiometric quantity needed to form elemental sulphur, with only a small amount of metal impurities dissolved (Ag, Zn and Fe). The lead solubility limit at those conditions was found to be24 g Pb(II) L-1. X-ray diffraction analyses of the leach residues were free of galena (PbS), while other metal sulphides, such as sphalerite (ZnS), chalcopyrite (CuFeS2) and pyrite (FeS2), were basically unaffected.
AB - Selective leaching of lead from a Pb-Ag-Zn concentrate with hydrogen peroxide in citrate solutions was studied at room temperature. Leaching tests were performed, varying the H2O2 concentration and the solid-liquid ratio, holding the solution pH constant at 7 and the citrate concentration at 1M. Lead extractions of 100%were achieved with four and five times the stoichiometric quantity needed to form elemental sulphur, with only a small amount of metal impurities dissolved (Ag, Zn and Fe). The lead solubility limit at those conditions was found to be24 g Pb(II) L-1. X-ray diffraction analyses of the leach residues were free of galena (PbS), while other metal sulphides, such as sphalerite (ZnS), chalcopyrite (CuFeS2) and pyrite (FeS2), were basically unaffected.
KW - Citrate
KW - Hydrogen peroxide
KW - Lead
KW - Selective leaching
UR - http://www.scopus.com/inward/record.url?scp=84953379050&partnerID=8YFLogxK
U2 - 10.1179/1879139515Y.0000000020
DO - 10.1179/1879139515Y.0000000020
M3 - Artículo
SN - 0008-4433
VL - 54
SP - 305
EP - 309
JO - Canadian Metallurgical Quarterly
JF - Canadian Metallurgical Quarterly
IS - 3
ER -