TX-100对油酸钠体系下菱镁矿与白云石浮选分离的影响  

Effect of TX-100 on Flotation of Magnesite and Dolomite Using NaOL as Collector

作　　者：孙文瀚 刘文刚[1] 杨婷 代淑娟 SUN Wen-han;LIU Wen-gang;YANG Ting;DAI Shu-juan(School of Resources&Civil Engineering,Northeastern University,Shenyang 110819,China;Sinosteel Maanshan Institute of Mining Research Co.,Ltd.,Maanshan 243000,China;School of Mining Engineering,University of Science and Technology Liaoning,Anshan 114051,China)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819 [2]中钢集团马鞍山矿山研究院,安徽马鞍山243000 [3]辽宁科技大学矿业工程学院,辽宁鞍山114051

出　　处：《东北大学学报（自然科学版）》2021年第2期226-231,共6页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(51874168);辽宁省“兴辽英才计划”项目(XLYC1807089);中央高校基本科研业务费专项资金资助项目(N180106004).

摘　　要：菱镁矿与白云石具有相似的晶体结构、化学成分及溶解特性,导致浮选分离难度较大.本文通过浮选试验、表面张力测定、红外光谱测试及X射线光电子能谱测试,研究油酸钠体系下曲拉通X-100(TX-100)对菱镁矿与白云石浮选分离的影响.结果表明,TX-100具有强化油酸钠对菱镁矿与白云石浮选分离的效果,油酸钠以化学方式吸附于菱镁矿与白云石表面,在白云石表面可能与TX-100有竞争吸附.TX-100降低了油酸钠的表面张力,促进了油酸钠的溶解和分散,同时通过增溶作用提高了生成油酸钙沉淀所需的钙离子浓度,使得油酸钠在白云石表面的吸附减弱,对白云石有选择性的抑制作用.Magnesite and dolomite are difficult to be separated by flotation because of their similar crystal structure,chemical composition,and dissolution characteristics.The effects of triton X-100(TX-100)on the flotation of magnesite and dolomite under sodium oleate system were studied by flotation tests,surface tension tests,FTIR tests and XPS tests.The results show that TX-100 can enhance the effect on the flotation separation of magnesite and dolomite by using NaOL.NaOL is chemically adsorbed on the surface of magnesite and dolomite,and may have competitive adsorption with TX-100 on the surface of dolomite.TX-100 reduces the surface tension of NaOL and promotes the dissolution and dispersion of NaOL.The concentration of Ca 2+needed to produce calcium oleate precipitation is increased by solubilization,which weakens the adsorption of sodium oleate on dolomite surface,thus selectively inhibiting the dolomite.

关 键 词：菱镁矿 白云石 TX-100 油酸钠 浮选 吸附机理 

分 类 号：TD923.14[矿业工程—选矿]