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时间:2020-03-26
《脉石英热压浸出纯化及热力学机理研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第25卷第2期中国矿业Vo1.25,No.22016年2月CHINAMININGMAGAZINEFeb.2016脉石英热压浸出纯化及热力学机理研究熊康,雷绍民。,钟乐乐。,裴振宇,杨亚运,臧芳芳(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610ooo)摘要:采用光学显微镜、电子探针、化学成分分析对脉石英原矿进行矿物学研究,显示脉石英原矿中广泛性赋存微细粒钾长石、钠长石、云母及黄铁矿等矿物包裹体,主要杂质元素为Fe、Al、Ca
2、、Mg、K、Na、Li、Mn等。热压浸出结果表明:热压过程导致石英晶格畸变并溶解出填隙在晶格中的金属离子,杂质元素总量由300.37/~g/g降至39.18t~g/g,总去除率达到86.96,SiO。含量为99.996。以单矿物钾长石、钠长石、云母和黄铁矿为研究对象,深入讨论了它们在热压体系中的浸出行为及机理。热力学分析表明,石英及杂质矿物与HF反应的吉布斯自由能均小于零,但杂质矿物远小于石英与HF反应的吉布斯自由能。在热压浸出体系下,HF优先与钾/钠长石、白云母反应。关键词:脉石英;热压浸出;高纯石英;热力学中图分类号:TD973.3文献标识码:A文章编号:1004
3、—4051(2016)02—0129—05ThermodynamicmechanismandpurificationofhotpressleachingwithveinquartzXIONGKang’,LEIShao—min’,ZHONGLe-le’。,PEIZhen—yu,YANGYa—yun,ZANGFang—fang(1.SchoolofResourcesandEnvironmentalEngineering,WuhanUniversityofTechnology,Wuhan430070,China;2.AviationElectronicAppliancesa
4、ndInformationNetworkinEngineeringTechnologyResearchCenterofGuizhouProvinceColleges,AnshunCollege,Guizhou56i000,China;3.ComprehensiveTestingCenter113Chengdu,SichuanGeologyandMineralBureau,Chengdu610000,China;)Abstract:Themineralogicalinvestigationofveinquartzhasbeendonebyusingopticalmicr
5、oscope,electronmicroprobeanalysisandChemicalanalysis.Theresultshowsthat,thereareplentyofmicro—finemineralinclusionsinquartzlatticessuchasfeldspar,albite,micaandpyrite.Fe、A1、Ca、Mg、K、Na、Li、Mnaremainimpuritieselementsofit.Hotpressleachingshowsthatleachingagentmakethequartzlatticedistortion
6、anddissolvedtheimpuritieselementwhichinterstitialinit.Tota1amountsofimpurityelementsofthequartzsandsweredecreasedfrom300.37ktg/gto39.18/~g/g.ThecontentofSiO2is99.996%.Thetotalremovalratesare86.96.PuremineralexperimentofFeldspar,Albite,MicaandPyritehadbeendonetodiscussiontheirleachingbeh
7、aviorandmechanisminhotpressleachingSystem.ThethermodynamicanalysisofhotpressleachingshowedthattheGibbsfreeenergyofHFreactedwithQuartz,Feldspar,MicaandPyritearealllessthanzero,buttheGibbsfreeenergyofHFreactedwithmineralimpuritiesaremuchlessthanitwithQuartz,theHFiseasytoreactwith
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