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Cyanidation of Gold Associated with Silver Minerals in Sulfide Mineral Matrices
Author(s) -
Khalid Muhammad,
Larachi Faïçal,
Adnot Alain
Publication year - 2018
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201700613
Subject(s) - stibnite , gold cyanidation , dissolution , sulfide minerals , pyrite , chemistry , mineral , sphalerite , sulfide , galena , inorganic chemistry , mineralogy , cyanide , organic chemistry
Lead salt stimulated the dissolution of gold when gold associated with silver minerals was interspersed in the silica or in the pyrite‐silica layer. Gold dissolution was likewise promoted through lead addition for chalcopyrite‐silica and the sphalerite‐silica systems. Lead addition did not boost gold dissolution and a recovery of 6.9 % was achieved for gold and silver minerals dispersed in stibnite. Lead pretreatment also enhanced gold recovery except for the stibnite‐silica system. Gold surface‐passivating films were observed for gold associated with silver minerals and stibnite.