AU-AG RECOVERY FROM COMPLEX ORE BY FLOTATION

摘要

The lead-zinc ore sample containing 3.45 per cent Pb, 3.15 per cent Zn, 12.2g/t Au and 256 g/t Agrnwas subjected to this experimental study and taken from Bolkarda?-Ni?de, south eastern part ofrnAnatolia. According to the mineralogical studies, the representative ore sample contains primarilyrnnative gold, electrum, native silver, and argentojarosite as gold and silver minerals, cerusite,rnanglesite, galena, pyromorphite, mimetite and plumbojarosite as lead minerals, smithsonite,rnhydrozincite, hemimorphite, adamite and sphalerite as zinc minerals, limonite, hematite, goethite,rnpyrite, magnetite and siderite as lead minerals and quartz, feldspar, albite and muscovite as ganguernminerals.rnBeneficiation of complex lead and zinc ore was investigated using flotation method. Variousrnparameters such as particle size, flotation stages, collector type, collector amount, control reagentsrnwere investigated to recover of gold and silver bearing minerals. At the end of the experimental studies,rnthe flotation experiments performed with Aero 208+Aerophine 3418 A (350 + 350 g/t) collectors atrnpH 4.5 gave the best result. -38 microns particle size and 1000 g/t of Na_2SiO_3 as depressant werernused at these conditions. At the end of the experiments, a process was designed for evaluation of thernore. According to the process, a concentrate having 920 g/t Au and 10100 g/t Ag can be obtained withrnthe recoveries of 54.1 per cent and 31.1 per cent, respectively.