Some results of studies on leaching of toxic elements in Asgat polymetallic concentrate

Extended ICP-OES and AAS analysis of floated polysulphide concentrate from the Asgat polymetallic ore revealed that contains 0.91% silver, 18.2% copper, 19.4% antimony, 2.03% arsenic 1.6% bismuth together with other elements. The prevailing minerals in are tetrahedrite, bismuthinite, chalcopyrite, arsenopyrite pyrite non-ore i.e. siderite, muscovite quartz. content above was estimated by X-ray diffraction (XRD), scanning electron microscopy (SEM) energy dispersive spectroscopy (EDS) analysis. An optimum condition for antimony leaching tetrahedrite alkaline-sulphide solution studied comprehensively. In optimized condition, 99.25% Sb, 89.0% As 44.50% Bi were dissolved into solution, successfully. solid residue sulphide as well chalcopyrite (CuFeS2), covellite (CuS), chalcocite (Cu2S), (FeS) argentite (Ag2S). Chalcopyrite not soluble solution. product decomposition. activation calculated 81.43kJ/mol indicates process occurred chemical reaction. ??????? ???????????? ??????? ???? ?????? ????????????? ?????? ?????? ????? ???? ?????????? ????? ?? ??? ?????????: ??????? ????????? ????????? ?????? ????? ????????????? ???????? ?????, 19.20% ???, 19.40% ??????, ??????, 1.60% ?????? ????? ????? ???????? ??????? ?????????? ??????? ???? ??????????? (AAS) ????????? ??????? ??????? ??????????? (ICP-OES)-?? ????????? ????????????. ????????? ????? ???????? ????????? ??????????????????? ???????? ?????????, ???????? ???????? ??????????? (SEM-EDS)-??? ????????????? ??????????, ????????, ???????????, ???????????, ????? ????? ?????? ?????????? ????? ???????, ????????, ????? ??????? ??? ??????? ????. ????????? ????-????????? (Na2S+NaOH) ???????? ??????, ?????? ????? ??????? ??????????? ???????? ?????????? ???????. ??????????? ??????? ?????????? ??????? ?????? 99.25%, ?????? 89.00%, ??????. ????????? ????? ????????? ??????????? ??????? ????????? (FeS2), ???????? (Ag2S) ????????? ???????. ????-????????? ????????. ???????, ?? ????????????? ????????? ??????. ????????????? ?????????? ??????? ??????????? ???????? ??????????? 81.43 ??/???? ?????? ?? ??????? ?????? ???????? ???????? ??????? ??????? ?????.??????? ??: ???????, ??????.