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分散剂对某膨润土矿分散行为影响研究 预览

Effect of Dispersant on Dispersion Behavior of Bentonite
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摘要 高纯度的膨润土具有很高的价值,而分级提纯对提高膨润土纯度非常重要。该论文以某地区膨润土为研究对象,在掌握矿石性质的基础上,对膨润土做分级试验,研究分散剂种类和用量对矿物各粒级产率和蒙脱石含量的影响,探究分散剂对矿物分散行为的影响规律和机理。研究结果表明:在分散剂用量均为0.5%时,由-5μm粒级产率知药剂分散效果,聚丙烯酸钠〉六偏磷酸钠〉焦磷酸钠。聚丙烯酸钠具有高负电荷密度,使颗粒表面电位的绝对值增高,静电排斥作用增强,阻碍了颗粒间相互聚集和重力沉降,因而大大提高了矿浆的分散程度。 High purity bentonite is of great value,and classifying process is largely critical to improve the purity of bentonite.In this paper,using bentonite collected from a certain area as the subject,classifying test was conducted on the basis of ore properties,to study the effect of dispersant type and amount on the yield of each classification and the content of montmorillonite,as well as the law and mechanism of dispersant influencing mineral dispersion behavior.The results show that when the dispersant dosage is 0.5%,the dispersion effect order of different reagents is:sodium polyacrylate sodium hexametaphosphate sodium pyrophosphate,which is estimated by the yield of-5 μm classification.With high negative charge density,the particle surface potential absolute value of sodium polyacrylate increases,and the electrostatic repulsion enhances,which inhibites the accumulation of particles and gravity sedimentation.Thus,the dispersion degree of the pulp is greatly improved.
作者 周鹏 高惠民 任子杰 岑对对 ZHOU Peng1 , GAO Hu i-mina ,REN Zi-jieia , CEN Dui-dui1(1. School of Resources and Environment Engineering,Wuhan University of Technology, Wuhan 430070,China;2. Hubei Province Key Laboratory of Mineral Resources Processing and Environment, Wuhan 4 3 0070, China)
出处 《硅酸盐通报》 CSCD 北大核心 2018年第1期357-362,共6页 Bulletin of the Chinese Ceramic Society
关键词 膨润土 分散 六偏磷酸钠 聚丙烯酸钠 焦磷酸钠 ZETA电位 bentonite purification hexametaphosphate sodium polyacrylate sodium pyrophosphate Zeta potential
作者简介 周鹏(1992-),男,硕士研究生.主要从事非金属矿研究.;通讯作者:高惠民,教授,博导.
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