氢键在非硫化矿浮选捕收剂吸附机理中的作用  

The Role of Hydrogen Bonding in the Adsorption Mechanism of Flotation Collectors for Nonsulfides

作　　者：朱一民[1,2] 乘舟越洋 刘杰 ZHU Yimin;CHENG Zhouyueyang;LIU Jie(School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China;National-local Joint Engineering Research Center of High-efficient Exploitation Technology for Refractory Iron Ore Resources,Shenyang 110819,China;College of Materials and Chemistry&Chemical Engineering,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]东北大学资源与土木工程学院,沈阳110819 [2]难采选铁矿资源高效开发利用技术国家地方联合工程研究中心,沈阳110819 [3]成都理工大学材料与化学化工学院,成都610059

出　　处：《有色金属(选矿部分)》2025年第2期49-55,145,共8页Nonferrous Metals(Mineral Processing Section)

摘　　要：浮选过程是一个复杂的物理化学过程,涉及到捕收剂与矿物表面的相互作用、气泡的生成和上升、矿物颗粒与气泡的黏附和脱落等多个阶段。该过程包含的两个主要问题(捕收剂在矿物表面如何作用、能否形成稳定泡沫层)都涉及吸附作用力。浮选体系下药剂极性基与矿物表面活性位点原子(离子)之间的吸附作用力具有多种类型,按照远程力(μm)、中程力(nm)、近程力(pm)可分为:静电吸附、分子间作用力吸附(包括氢键吸附)及键合吸附。作者所在的东北大学浮选药剂团队根据不同吸附体系下对药剂、矿物及其相互作用的研究经验,提出在浮选体系下,药剂在矿物颗粒表面的吸附机理一般为强极性基化学键优先吸附、相邻原子团氢键耦合及静电吸附协同作用,并提出在非硫化矿浮选体系中氢键耦合吸附协同作用不容忽视。同时,还需要注意氢键在浮选体系下的多种存在形式,药剂在矿物颗粒表面有氢键吸附,浮选泡沫层的液膜结构中也存在氢键吸附。分子动力学模拟作为一种新兴手段,为研究浮选体系、获得可能的吸附构型并分析构型中氢键数量的动态变化发挥了重要作用。Flotation process is a complex physical and chemical process,which involves many stages,such as the interaction between collector and mineral surface,the formation and rise of bubbles,the adhesion and shedding of mineral particles and bubbles.The two main problems involved in this process(how the collector acts on the mineral surface and whether a stable foam layer can be formed)are related to the adsorption force.There are many types of adsorption forces between the polar groups of reagents and the active site atoms(ions)on the mineral surface in the flotation system,which can be divided into electrostatic adsorption intermolecular force adsorption(including hydrogen bonding adsorption)and bonding adsorption according to long-range force(μm),medium-range force(nm)and short-range force(pm).Based on the research experience of reagents,minerals and their interactions in different adsorption systems,the flotation reagent team of Northeastern University proposed that the adsorption mechanism of reagents on the surface of mineral particles in the flotation system is generally the preferential adsorption of chemical bonds with strong polar groups,the hydrogen bond coupling of adjacent atomic groups and the synergistic effect of electrostatic adsorption.It is suggested that the synergistic effect of hydrogen bond coupling adsorption should not be ignored in the flotation system of nonsulfide ores.At the same time,attention should also be paid to the various forms of hydrogen bonds in the flotation system,such as the hydrogen bond adsorption of reagents on the surface of mineral particles and the hydrogen bond adsorption in the liquid film structure of the flotation foam layer.Molecular dynamics simulation,as a new tool,has played an important role in studying flotation systems,obtaining possible adsorption configurations and analyzing the dynamic changes of the number of hydrogen bonds in the configurations.

关 键 词：氢键 非硫化矿 捕收剂 吸附机理 

分 类 号：TD923[矿业工程—选矿]