分散剂对微细粒白云石分散行为的影响及作用机理  

Three Dispersants Enhance Dispersion Behavior and Mechanism of Fine Dolomite

作　　者：时景阳 罗娜 汤家焰 SHI Jingyang;LUO Na;TANG Jiayan(School of Mining and Coal,Inner Mongolia University of Science and Technology,Baotou 014010,China;Key Laboratory of Mining Engineering of Inner Mongolia,Inner Mongolia University of Science and Technology,Baotou 014010,China)

机构地区：[1]内蒙古科技大学矿业与煤炭学院,内蒙古包头014010 [2]内蒙古科技大学内蒙古自治区矿业工程重点实验室,内蒙古包头014010

出　　处：《矿产保护与利用》2023年第1期92-97,共6页Conservation and Utilization of Mineral Resources

基　　金：内蒙古科技大学创新基金项目(2019QDL-S06)。

摘　　要：为研究微细粒白云石矿浆体系分散行为,通过纯矿物沉降试验,考察了矿浆pH值、分散剂种类(ZSC、ZSS、ZSP-1、ZSP-2、ZSP-3)及其添加量对白云石分散率的影响并采用Zeta电位、红外光谱分析、润湿接触角测量等手段进行了表征。试验结果表明:不添加分散剂时,pH值对体系分散影响较大,碱性条件下微细粒白云石分散率可达到20%,优于酸性条件(分散率5%);分散剂对白云石矿物分散能力强弱顺序为ZSP-1>ZSP-2>ZSP-3>ZSS>ZSC。分析表明,不同种类分散剂在微细粒白云石表面主要以物理吸附与化学吸附形式共同作用,分散剂通过改变矿物表面Zeta电位使颗粒间静电斥力增强,以及降低矿物表面接触角,使颗粒表面亲水性增强,从而提高矿物颗粒间距来强化白云石的分散。In order to study the dispersion behavior of fine dolomite pulp system,through the single mineral sedimentation experiment,solution pH and dispersant type(ZSC,ZSS,ZSP-1,ZSP-2,ZSP-3)and dosages on the influence of dolomite dispersion.In this study,the effect of dispersant on the Zeta potential,infrared spectrum analysis and wetting contact angle measurement of fine dolomite were investigated.Results indicated that the pH value had a great influence on the dispersion of the system without adding dispersant.The dispersion rate of alkaline conditions(20%)was about 15%higher than that of acidic conditions(5%).The order of dispersing ability of dispersant to dolomite minerals was ZSP-1>ZSP-2>ZSP-3>ZSS>ZSC.The analysis showed that different kinds of dispersants mainly acted together in the form of physical adsorption and chemical adsorption on the surface of fine dolomite.The dispersant increased the electrostatic repulsion of the fine dolomite,while enhanced the hydrophobicity of the fine dolomite,thereby improving the dispersion of dolomite.

关 键 词：微细粒 白云石 分散行为 分散剂 

分 类 号：TD923.14[矿业工程—选矿]