钙基膨润土的钠化改性研究  

Study on Sodium-modification of Ca-bentonite

作　　者：刘芳芳[1] 戴亚堂[1] 张欢[1] 张红强[1] 魏自创[1] 

机构地区：[1]西南科技大学材料科学与工程学院,四川绵阳621010

出　　处：《非金属矿》2010年第6期37-39,57,共4页Non-Metallic Mines

基　　金：国家高技术研究发展计划(863计划)资助项目(2008AAxxx0810);西南科技大学博士基金(08zx0101)

摘　　要：为了改善天然钙基膨润土的物化性质,本实验采用悬浮液法系统研究了钠化剂种类与用量、反应温度、反应时间、体系pH值以及矿浆浓度对钠化膨润土膨胀容的影响,得出了最佳钠化条件。并利用X射线衍射(XRD)、热重-差示扫描量热分析(TG-DSC)和能谱(EDS)对样品进行了简单的性能测试,结果表明,利用NaF改性的膨润土的结晶度减小。同时由于体积较小的F-的影响,钠化膨润土的热稳定性增强。In order to improve physical and chemical properties of natural Ca-bentonite,the selections of the conversion agent,temperature,reaction time,pH value and the ore slurry concentration for expansion capacity of natural Ca-bentonite by suspensoid were systematicly studied and the optimum conversion conditions were obtained in this experiment.X-ray diffraction（XRD） patterns and thermogravimetry-differential scanning calorimetry（TG-DSC） and energy dispersive spectroscopy（EDS） were carried out to characterize the properties of samples,the results showed that the crystallinity of modified bentonite by NaF is lower than original sample and the thermal stability is increased by the influence of F-.

关 键 词：钙基膨润土 钠化改性 NAF 热稳定性 

分 类 号：TD97[矿业工程—选矿]