混合酸热压浸出纯化脉石英及机理  

Purification of vein quartz by mixed acid thermal pressure leaching and it's mechanism

作　　者：臧芳芳 雷绍民[1,2] 钟乐乐[1,3] 裴振宇[1] 杨亚运[1] 熊康[1] 

机构地区：[1]武汉理工大学资源与环境工程学院,湖北武汉430070 [2]安顺学院航空电子电器与信息网络贵州省高校工程技术研究中心,贵州安顺561000 [3]四川省地矿局成都综合岩矿测试中心,四川成都610000

出　　处：《中国矿业》2016年第5期106-110,共5页China Mining Magazine

基　　金：安顺学院航空电子电气与信息网络贵州省高效工程技术研究中心项目资助(编号:HKDZ201404)

摘　　要：采用混合酸热压浸出方法制备高纯石英。研究了HF、HCl、HNO3浓度、液固比、反应时间、反应温度对热压浸出纯化脉石英的影响。结果表明:在优化的技术条件下,脉石英中杂质金属元素Fe、Al、Ca、Mg、K、Na去除率分别可达67.04%、96.96%、84.97%、73.18%、76.25%及58.97%。热压浸出过程中,混合酸溶液不仅能与石英晶体表面杂质矿物反应,还能沿缝隙扩散进入石英晶体界面或晶体内部,部分填隙式金属原子溶出导致石英晶体中硅氧四面体排列由规则向不规则过渡,即晶格发生畸变,增加了石英晶格中金属原子溶出的几率,有利于石英纯化。The high purity quartz was prepared using mixed acid at thermal pressure leaching. The influential factors such as concentration of HF, HC1 and HNOa. liquid-solid ratio, reaction time and temperature on purification of vein quartz as thermal pressure leaching were investigated. The results showed that the rate of removal of impurity metal elements Fe, Al, Ca, Mg, K, Na were respectively 67.04%0,96. 96%,84. 97%,73. 18%,76. 25%,and 58. 97% at the optimizational process parameters. During this thermal pressure leaching, the mixed acid could not only be reacted with impurity mineral on the surface of quartz particles, but also be diffused into the interface or inside along the crack of quartz crystal particles. It will be lattice distorted owing to the part of interstitial atoms dissolved out and resulting that the silicon oxygen tetrahedral arrangement the transition from the rule to the irregular in the crystals of quartz which increasing the probability of the dissolution of the metal atom and in favor of quartz purification.

关 键 词：脉石英 混合酸 热压浸出 纯化 高纯石英 

分 类 号：TD925[矿业工程—选矿]