(1. 東北大學 資源與土木工程學院，沈陽 110819；
2. 內蒙古科技大學 礦業(yè)工程學院，包頭 014010；
3. 北京礦冶研究總院，北京 100044)
摘 要: 通過純礦物浮選、Zeta電位測試、紅外光譜分析及溶液化學計算分析，研究Cu(Ⅱ)和Ni(Ⅱ)離子對蛇紋石浮選的活化機理。結果表明：溶液pH＞6.5時，銅離子在水溶液中的優(yōu)勢組分為氫氧化銅沉淀；氫氧化銅沉淀覆蓋在蛇紋石表面，與黃原酸根反應，從而活化蛇紋石浮選。溶液pH＞8時，鎳離子在水溶液中優(yōu)勢組分為氫氧化鎳沉淀，能吸附于蛇紋石表面使其活化，但其活化作用弱于Cu2+。在酸性pH值范圍內，銅、鎳在水溶液中主要以Cu2+、Ni2+形式存在，對蛇紋石浮選沒有活化作用。
關鍵字: 銅鎳硫化礦；浮選；活化；蛇紋石
（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
