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。
The activation mechanism of serpentine by Cu^2＋ and Ni^2＋ 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＆gt;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 Ni^2＋is weaker the that of Cu^2＋. While in acidic pH range, metal ions of Cu^2＋and Ni^2＋are the main species in solution, which can not activate the flotation of serpentine.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2014年第2期506-510,共5页
The Chinese Journal of Nonferrous Metals
基金
国家自然科学基金资助项目(51174154)
内蒙古科技大学创新基金资助项目(2012NCL012
2012NCL029)
关键词
铜镍硫化矿
浮选
活化
蛇纹石
copper-nickel sulfide ore
flotation
activation
serpentine
