【摘要】 研究了以乙硫氮为捕收剂时脆硫锑铅矿的浮选性质。在酸性介质中脆硫锑铅矿具有良好的可浮性;但在碱性介质中(pH>8.0),可浮性急剧下降;在pH=11.0的高碱条件下,无论矿浆电位如何变化,脆硫锑铅矿的可浮性都很差。pH=6.0,脆硫锑铅矿的可浮电位区间为0~0.7 V,电位范围较宽;pH=9.18时,可浮电位区间则为0~0.5 V。采用循环伏安电位扫描研究方法,研究了乙硫氮在脆硫锑铅矿表面的电化学作用机理,在其表面没有氧化形成四乙基二硫化秋兰姆(TETD或D2)分子;电极电位从-0.25 V左右开始就在脆硫锑铅矿产生了化学吸附。在乙硫氮存在时,从0.35 V开始乙硫氮与脆硫锑铅矿相互作用明显,电位增加到0.75V附近存在明显的氧化峰,试验结果表明在脆硫锑铅矿表面有PbD2、SbOD形成产生。电化学试验结果与浮选试验结果能较好地对应起来。更多还原

【Abstract】 The floatation performance of jamesonite with diethyldithiocarbamate as collector is studied.The floatability of jamesonite in acidic medium was high,but droped sharply in alkaline medium.When pH=11.0,the floatability of jamesonite is always low however the slurry potential changes.When pH=6.0,the floatable potential range of jamesonite was 0～0.7 V;pH=9.18,0～0.5 V.The electrochemical mechanism of diethyldithiocarbamate on the jamesonite surface is investigated by cyclic voltammetry method.No tetracthyl thiuram（TETD or D₂） molecule formed by oxidation on the surface.At the potential from-0.25 V on,the chemical adsorption of jamesonite occurred.In the presence of diethyldithiocarbamate,the interaction between jamesonite and diethyldithiocarbamate became obvious from 0.35 V on.When the potential increased to about 0.75V,there is obvious oxidation peak.The test results show that there are PbD₂ and SbOD formed on the surface of jamesonite.The results of the electrochemical test correspond to those of the floatation test well.更多还原