(武汉工程大学 资源与安全工程学院，武汉 430073)
摘 要: 针对传统黄铜矿抑制剂存在的污染环境、药剂消耗量大等问题，开发新的抑制方式以实现铜钼有效分离极为重要。本文通过单矿物与混合矿浮选试验研究了过硫酸铵(APS)氧化对黄铜矿和辉钼矿可浮性及铜钼分离性能的影响，并通过Zeta电位、拉曼光谱与X射线光电子能谱(XPS)探讨了其抑制机理。浮选结果表明：APS可以显著地降低黄铜矿的回收率，而不影响辉钼矿上浮，进而实现铜钼的高效分离。Zeta电位、拉曼光谱与XPS结果表明：APS可以氧化黄铜矿表面生成亲水的氧化物与氢氧化物，使黄铜矿受到抑制，而对辉钼矿的疏水性和表面性质几乎没有影响，从而实现铜钼的有效浮选分离。
关键字: 过硫酸铵；黄铜矿；辉钼矿；浮选分离；氧化
（School of Resources and Safety Engineering, Wuhan Institute of Technology, Wuhan 430073, China）
Abstract:In view of environmental pollution and large consumption of traditional chalcopyrite depressants, it is important to develop novel depression methods to achieve effective copper-molybdenum separation. In this work, the effect of ammonium persulfate (APS) oxidation on the floatability of chalcopyrite and molybdenite and copper-molybdenum separation performance was investigated by single mineral and mixed minerals flotation tests. The depression mechanism was explored through Zeta potential, Raman spectroscopy and X-ray photoelectron spectroscopy (XPS). The flotation results show that the chalcopyrite recovery is significantly reduced by APS, where as the molybdenite recovery is not affected, thus achieving efficient separation of copper-molybdenum. Zeta potential, Raman spectroscopy and XPS results indicate that APS can oxidize chalcopyrite surface to generate hydrophilic oxides and hydroxides, which leads to chalcopyrite being depressed. But APS has almost no influence on the hydrophobic and surface properties of molybdenite, thereby accomplishing effective flotation separation of copper and molybdenum.
Key words: ammonium persulfate; chalcopyrite; molybdenite; flotation separation; oxidation
