金属阳离子对重晶石浮选行为的影响

The effect of metal cations on flotation behavior of barite

通过单矿物浮选、溶液化学计算、Zeta电位测试以及红外光谱分析等手段研究了金属阳离子(Fe3+、Zn2+、Fe2+和Pb2+)对重晶石浮选行为的影响以及作用原理。浮选结果表明,在十二烷基磺酸体系下,4种金属阳离子Fe3+、Zn2+、Fe2+和Pb2+在p H值为4.0~11.2范围内对重晶石的可浮性都具有活化作用,其中Pb2+对重晶石的可浮性活化效果最好,Fe2+次之。Pb2+活化机理研究显示,Pb2+主要以Pb2+、Pb(OH)+的形式和重晶石表面吸附的OH-结合并脱水,然后吸附在重晶石矿物表面并促进十二烷基磺酸根阴离子在重晶石表面的吸附,从而增强了重晶石的可浮性。

The effect and its principle of action of metal cations (Fe3+,Zn2+,Fe2+and Pb2+) on flotation behavior of barite have been studied in this paper by using means of the mineral separates flotation,stoichiometric calculation of solutions,Zeta potential test,and infrared spectroscopy.Flotation experimental results show that four metal cations of Fe3+,Zn2+,Fe2+and Pb2+can activate the flotability of barite at p H values ranging from 4 to 11.2 in the SDS flotation system.Especially,the Pb2+has the best activation effect on the flotability of barite,followed by the Fe2+.The Pb2+activation mechanism study shows that the Pb2+,mainly occurred in forms of Pb2+and Pb(OH)+,was combined and dehydrated with the OH--adsorbed on surface of the barite,and then the combined Pb2+(Pb2+,Pb(OH)+) and OH-,which was adsorbed on surface of the barite,has promoted the adsorption of dodecyl sulfonate anions on the surface of barite,and thereby has enhanced the floatability of barite.