孔雀石分段硫化的浮选行为及机理研究

Staged Sulfuartion-flotation of Malachite and Its Mechanism

为进一步提高孔雀石的硫化浮选效果,通过单矿物浮选试验,系统研究了孔雀石分段硫化的浮选行为,采用X射线光电子能谱(XPS)分析了孔雀石分段硫化浮选的作用机理。浮选试验结果表明:孔雀石自然可浮性中等,碳酸铵对孔雀石硫化浮选有较好的活化效果;孔雀石分段硫化浮选的最佳段数为三段,三段硫化浮选相较于一段、二段硫化浮选,其回收率分别提高了14.68个百分点、5.44个百分点,四段硫化浮选较三段硫化浮选效果变差,回收率下降了1.62个百分点。XPS分析结果显示:在总药剂量不变的情况下,三段硫化浮选泡沫产品矿矿物表面一价铜的多硫化物含量最高,硫化膜稳定性提高,改善了矿物表面的硫化效果,促进了捕收剂的吸附,提高了孔雀石硫化浮选总回收率。

In order to further improve the sulfuration-flotation effect of malachite,the effect of staged sulfuration-flotation behavior of malachite was systematically studied through single mineral flotation tests,X-ray photoelectron spectroscopy(XPS)was used to analyze the mechanism of malachite staged sulfuration-flotation.The flotation results show that malachite had medium natural floatability and ammonium carbonate had better activation on malachite staged sulfuration-flotation;When the number of malachite segmented sulfuration-flotation stages is three,compared with the first,second and fourth stages,the sulfuration-flotation recovery rate of malachite increased by 14.68%and 5.44%,respectively.The effect of the four-stage sulfuration-flotation is poorer than that of three-stage sulfuration-flotation,and the recovery rate decreased by 1.62%.Therefore,achieving the effective flotation performancethe by the three-stage sulfuration-flotation;According to the results of X-ray photoelectron spectroscopy,under the condition of the same total dosage,the content of monovalent copper on the surface of the foam products of three-staged sulfuration-flotation is further increased,increasing the stability of sulfide films,improving sulfuration-flotation performance,enhancing adsorption of collectors,and increasing total flotation recovery.