TY - JOUR
T1 - Effect of NaCN:ZnSO4 Mixture Molar Ratio and Particle-Size Distribution on Pb-Zn and Fe Selective Separation by Froth Flotation
AU - Arellano-Piña, Ramón
AU - Sanchez-Ramirez, Elvia Angélica
AU - Pérez-Garibay, Roberto
AU - Corona-Arroyo, Mario
N1 - Publisher Copyright:
© 2021, The Minerals, Metals & Materials Society.
PY - 2022/1
Y1 - 2022/1
N2 - This work studies the depression of sphalerite and pyrite with a NaCN:ZnSO4 mixture in the selective separation of Pb-Zn by flotation when the blend is enriched with Ag. Given in this paper are an explanation of depression mechanism and the method for optimizing the Pb-Ag recovery. This was done by analyzing the thermodynamics of an aqueous system and evaluating two experimental techniques: flotation kinetic tests and wettability on minerals. The best Pb-Zn separation was observed using a 10:1 mixture molar ratio and coarse-size-particle distribution in the flotation kinetic test (separation 48.24% and lead recovery 83.70%). Wettability measurements and thermodynamic analysis support that free cyanide [CN−] and zinc cyanide species [Zn(CN)3− and Zn(CN)42−] selectively depressed the pyrite and sphalerite, favoring galena floatability. Finally, the silver recovery (argentite associated with pyrite and quartz) is affected by mineralogical association and both, particle-size distribution and mixture molar ratio.
AB - This work studies the depression of sphalerite and pyrite with a NaCN:ZnSO4 mixture in the selective separation of Pb-Zn by flotation when the blend is enriched with Ag. Given in this paper are an explanation of depression mechanism and the method for optimizing the Pb-Ag recovery. This was done by analyzing the thermodynamics of an aqueous system and evaluating two experimental techniques: flotation kinetic tests and wettability on minerals. The best Pb-Zn separation was observed using a 10:1 mixture molar ratio and coarse-size-particle distribution in the flotation kinetic test (separation 48.24% and lead recovery 83.70%). Wettability measurements and thermodynamic analysis support that free cyanide [CN−] and zinc cyanide species [Zn(CN)3− and Zn(CN)42−] selectively depressed the pyrite and sphalerite, favoring galena floatability. Finally, the silver recovery (argentite associated with pyrite and quartz) is affected by mineralogical association and both, particle-size distribution and mixture molar ratio.
UR - http://www.scopus.com/inward/record.url?scp=85119687348&partnerID=8YFLogxK
U2 - 10.1007/s11837-021-04998-z
DO - 10.1007/s11837-021-04998-z
M3 - Artículo
AN - SCOPUS:85119687348
SN - 1047-4838
VL - 74
SP - 36
EP - 46
JO - JOM
JF - JOM
IS - 1
ER -