Mg^(2+)对油酸钠捕收石英的活化机理研究  

Activation Mechanism of Magnesium Ions to Sodium Oleate Capture Quartz

作　　者：张臻 张凌燕[1,2] 吴建新[3] 管俊芳[1] 陈志强[3] 张冲[3] 段树桐[3] Zhang Zhen;Zhang Lingyan;Wu Jianxin;Guan Junfang;Chen Zhiqiang;Zhang Chong;Duan Shutong(School of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan 430070,China;HubeiKey Laboratory of Mineral Resources Processing and Environment,Wuhan 430070,China;Bengbu Research Institute for Glass Industry,Bengbu 233018,China)

机构地区：[1]武汉理工大学资源与环境工程学院,湖北武汉430070 [2]矿物资源加工与环境湖北省重点实验室,湖北武汉430070 [3]蚌埠玻璃工业设计研究院,安徽蚌埠233018

出　　处：《金属矿山》2019年第5期84-87,共4页Metal Mine

基　　金：安徽省科技重大专项(编号:15czz02044)

摘　　要：石英矿物中常伴生有Mg^(2+),为了解Mg^(2+)对油酸钠浮选石英的影响,进行了石英纯矿物浮选试验,并采用Zeta电位测试、溶液化学计算和红外光谱分析方法对Mg^(2+)活化石英的机理进行了研究。结果表明:①在没有Mg^(2+)存在的情况下,油酸钠对石英没有捕收能力;当矿浆pH=10.5,Mg^(2+)浓度为3.75×10^(-4)mol/L,油酸钠浓度为6.25×10^(-4)mol/L时,石英的浮选回收率可达92.40%。②Zeta电位分析表明,吸附在石英表面的Mg^(2+)是油酸钠吸附的活性位点,因而Mg^(2+)对油酸钠浮选石英有活化作用。③溶液化学分析表明,Mg^(2+)活化石英的有效成分为MgOH^+。④红外光谱分析表明,有Mg^(2+)存在的情况下,油酸钠才能吸附到石英颗粒表面。Magnesium ions are often associated with quartz minerals.In order to research the effect of magnesium ion on the quartz flotation by sodium oleate,the flotation tests of pure quartz minerals were carried out.The mechanism of magnesium ion activating quartz was studied by Zeta potential test,solution chemistry calculation and infrared spectroscopy analysis.The results showed that:①sodium oleate can not float quartzwithout magnesium ion;The flotation recovery rate of quartz can reach 92.40% under the condition that the pulp pH=10.5,the concentration of magnesium ion is 3.75×10^-4 mol/L,and the concentration of sodium oleate is 6.25×10^-4 mol/L.②Zeta potential analysis shows that magnesium ion adsorbed on the surface of quartz is the active site of sodium oleate adsorption,so magnesium ion has an activation effect on sodium oleate flotation of quartz.③Solution chemical analysis showed that the main active composion in the process of magnesium ion activation of quartz was MgOH+.④Infrared spectroscopy analysis showed that sodium oleate can adsorb to the surface of quartz particles with the help of magnesium ion.

关 键 词：石英 镁离子 油酸钠 活化 

分 类 号：TD923.1[矿业工程—选矿]