硫化矿物表面水化层结构及其对药剂作用的影响  

Research on the Solid-liquid Interfacial Structure and Properties of Sulfide Minerals and Its Effect on the Flotation Reagent Adsorption

作　　者：陈建华 朱阳戈 CHEN Jianhua;ZHU Yangge(College of Resources,Environment and Material,Guangxi University,Nanning 530004,China;BGRIMM Technology Group,Beijing 100070,China)

机构地区：[1]广西大学资源环境与材料学院,广西南宁530004 [2]北京矿冶科技集团有限公司矿物加工科学与技术国家重点实验室,北京100070

出　　处：《矿产保护与利用》2018年第3期1-8,共8页Conservation and Utilization of Mineral Resources

基　　金：国家自然科学基金资助项目(51574092;51164001)

摘　　要：采用密度泛函量子理论研究了硫化矿物表面亲水/疏水结构,揭示了硫化矿物固液界面结构和水化层的性质,采用微量热仪研究了硫化矿物表面润湿热力学和动力学行为,考察了矿物表面亲水和疏水作用对浮选药剂作用的影响。研究结果表明:疏水硫化矿物表面以氢键和范德华力作用为主,亲水硫化矿表面以弱化学吸附键作用为主,固液界面体系下药剂在矿物表面的作用具有水化势垒和竞争吸附效应。根据固液界面作用模型,开发出铜、铅和锌浮选新技术,实现了有色金属硫化矿资源的高效利用。The density functional theory was used to study the hydrophilic and hydrophobic structures on the surface of sulfide minerals. The solid-liquid interface structure and hydration layer properties of sulfide minerals were revealed. The wetting thermodynamic and kinetic behaviors of sulfide minerals were studied by using a microcalorimeter. The effects of hydrophilic and hydrophobic surfaces on the action of flotation agents were investigated. The results show that the surface of hydrophobic sulfide minerals is dominated by hydrogen bonds and Van der Waals forces,and the surface of hydrophilic sulfide minerals is dominated by weak chemical interactions. In the solid-liquid interface system,the adsorption of reagents on mineral surface has a hydration barrier and competitive adsorption effect. Based on the solid-liquid interface model,a new flotation technology of copper,lead and zinc have been developed to achieve clean and highly efficient recycling of non-ferrous metal sulfur resources.

关 键 词：硫化矿 固液界面 水化层 浮选分离 

分 类 号：TD91[矿业工程—选矿]