(1. 东北大学 资源与土木工程学院，沈阳 110819；
2. 内蒙古科技大学 矿业工程学院，包头 014010；
3. 北京矿冶研究总院，北京 100044)
摘 要: 通过纯矿物浮选、Zeta电位测试、红外光谱分析及溶液化学计算分析，研究Cu(Ⅱ)和Ni(Ⅱ)离子对蛇纹石浮选的活化机理。结果表明：溶液pH＞6.5时，铜离子在水溶液中的优势组分为氢氧化铜沉淀；氢氧化铜沉淀覆盖在蛇纹石表面，与黄原酸根反应，从而活化蛇纹石浮选。溶液pH＞8时，镍离子在水溶液中优势组分为氢氧化镍沉淀，能吸附于蛇纹石表面使其活化，但其活化作用弱于Cu2+。在酸性pH值范围内，铜、镍在水溶液中主要以Cu2+、Ni2+形式存在，对蛇纹石浮选没有活化作用。
关键字: 铜镍硫化矿；浮选；活化；蛇纹石
（1. College of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China;
2. School of Mining Engineering, Inter Mongolia University of Science and Technology, Baotou 014010, China;
3. Beijing General Research Institute of Mining and Metallurgy, Beijing 100044, China）
Abstract:The activation mechanism of serpentine by Cu2+ and Ni2+ in copper-nickel sulfide ore floatation was investigated with pure mineral flotation tests, Zeta potential measurement, IR spectrum measurement and solution chemistry analysis. The results show that copper hydroxide Cu(OH)2 is the main component in cupric solution as pH＞6.5, which will cover up serpentine and react with xanthate, activating the flotation of serpentine. And similarly, the nickel hydroxide Ni(OH)2 is the main component in nickelous solution at pH＞8, which will be adsorbed onto serpentine and make it activated, and the activation of Ni2+ is weaker the that of Cu2+. While in acidic pH range, metal ions of Cu2+ and Ni2+ are the main species in solution, which can not activate the flotation of serpentine.
Key words: copper-nickel sulfide ore; flotation; activation; serpentine
