脉石英常压加热浸出制备高纯石英及反应机理  

Preparation of High Purity Quartz and Reaction Mechanism Under the Atmospheric and Heating Condition for Vein Quartz

作　　者：雷绍民[1] 钟乐乐[1] 杨亚运[1] 裴振宇[1] 黄冬冬[1] 马球林 

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

出　　处：《矿业研究与开发》2015年第3期16-19,共4页Mining Research and Development

基　　金：国家科技部计划项目(2009GJC10027);江苏省科技厅科技基础设施计划项目(BM2010480)

摘　　要：采用XRD、EPMA-EDS、ICP等分析技术对脉石英进行了矿物学分析,在常压加热条件下,采用混合酸体系对脉石英砂化学浸出,制备出高纯石英。通过单因素和多因素正交试验,优化了化学浸出工艺及其参数。对于等摩尔浓度HCl和H2SO4,HCl能更好的溶解浸出金属元素;HNO3作为氧化剂,能有效氧化浸出金属元素Fe,使有害矿物黄铁矿或赤铁矿氧化还原生成可溶性Fe(NO3)3。用优化后混合酸体系可制备出SiO2稳定达到99.9wt%的高纯石英。讨论了混合酸在常压加热条件下与矿物包裹体中金属元素的反应机理。The mineralogical analysis of vein quartz was conducted by analysis technologies,such as XRD,EPMA-EDS and ICP.Under the atmospheric and heating condition,the chemical leaching of vein quartz was carried out to prepare high purity quartz by mixed acid.By the orthogonal tests with single factor or multiple factors,the process and parameters of chemical leaching were optimized.For the same molar concentrations of HCl and H2SO4,metal element could be better dissolved and leached by HCl.And Fe could be leached when HNO3 was an oxidant,which helped the pyrite or the hematite reduce to Fe(NO3)3.The high purity quartz with SiO2 of 99.9 wt% could be prepared stably by the optimized mix acid.Finally,the reaction mechanism of mixed acid and metal elements in mineral inclusions under the atmospheric and heating condition were discussed in detail.

关 键 词：脉石英 常压加热 化学浸出 氧化还原 高纯石英 

分 类 号：TD97[矿业工程—选矿]