欢迎来到天天文库
浏览记录
ID:33663203
大小:3.19 MB
页数:90页
时间:2019-02-28
《菱镁矿热选机理研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、辽宁稃技大学硕士论艾摘要菱镁矿热选机理研究摘要菱镁矿是一种非常重要的碱性无机非金属矿物,其加工后的产品,广泛应用于冶金、建材和化工等行业。然而高品位菱镁矿资源日趋减少,己经难以满足市场的需求,急需找到适合低品位菱镁矿的提纯方法。本课题以低品位菱镁矿为原料,研究其分解过程及机理,根据菱镁矿主矿物与含杂质矿物焙烧后硬度存在的差异,经过加工处理,获得一种简单实用、经济高效的低品位菱镁矿提纯方法。文中研究了五种不同品质的菱镁矿,找出了杂质在各矿种中的存在形式,进而得出了杂质的存在形式和含量对菱镁矿分解的影响。通过大量的实验研究,
2、找到了菱镁矿的原矿粒度、焙烧温度和保温时间对菱镁矿分解过程的影响,得到了菱镁矿的具体分解规律。同时,分析了这三个因素对制得的轻烧镁粉活性的影响。由各项对菱镁矿分解机理综合研究的实验,得到了一种适合低品位菱镁矿的热选方法,可以有效的去除杂质二氧化硅,去除部分氧化钙和氧化铝。原矿粒度、焙烧温度和保温时间是热选的三个重要参数,3~5ram粒度的原矿在800。C保温150min时,热选效果最好。用热选后的轻烧镁粉又模拟了风选,达到了更好的选矿效果。其中轻烧镁粉3、烧镁粉分级使用,从而实现菱镁矿资源的综合利用。关键词:菱镁矿,分解机理,轻烧镁粉,热选提纯辽宁科技大学硕士论文abstractResearchonmagnesiteheat-dressmechanismAbstractMagnesiteisakindofveryimportantbasicinorganiccompoundmaterial.Theproducts,whichareproducedfrommagensite,haveabroadapplicationinthefieldofmetallurgy,constr4、uctionandchemistry.Buttheresourceofmagnesiteismoreandmoreabsent,whichcan’tsarisfythedemandofthemarket.Soawayofpurifyingthepoormagnesiteshouldbediscovered.Takinglow—grademagnesiteforthedecomposingresearchinthispapertostudythedecompositionprocessandmechanism.Accord5、ingtothehardnessdifferencebetweenhostmineralsandtheimpurities,heat-dresswayisgainedwhichispractical,economicalandeffectiveaftercuring.Thispapermainlystudyfivekindsofmagnesite,andfindouttheexistenceformsoftheinpuritiesinmagnesiteandtheorderlinessthattheexistencefo6、rmsoftheinpuritiesreflectthedecompositionofmagnesite.Byselectingparticlesizeofrawmaterial,calcinationtemperatureandholdingtimetoexperiment,thereflectionofthethreefactorstomagnesitedecompositionandthedecomposedorderlinessofmagenistehasbeenlearned.Furthermore,itiss7、tudiedtotheactivityofcaustic—burnedmagnesiathroughresearchingthefactorsrelatiQnship.Accordingtoalltheexperimentationwhathasstudiedthemagnesiteheatmechanism,aneffectivemethodforpoormagnesitehasgained,whichcanremovecalciumoxidewell,andapartofsilicaandalumina.Partic8、lesizeofrawmaterial,calcinationtemperatureandholdingtimearethethreeimportantfacotorstomagnesiteheat·dress.Whenthesizeisatrangefrom3mmto5mmandholdingtimeisappro
3、烧镁粉分级使用,从而实现菱镁矿资源的综合利用。关键词:菱镁矿,分解机理,轻烧镁粉,热选提纯辽宁科技大学硕士论文abstractResearchonmagnesiteheat-dressmechanismAbstractMagnesiteisakindofveryimportantbasicinorganiccompoundmaterial.Theproducts,whichareproducedfrommagensite,haveabroadapplicationinthefieldofmetallurgy,constr
4、uctionandchemistry.Buttheresourceofmagnesiteismoreandmoreabsent,whichcan’tsarisfythedemandofthemarket.Soawayofpurifyingthepoormagnesiteshouldbediscovered.Takinglow—grademagnesiteforthedecomposingresearchinthispapertostudythedecompositionprocessandmechanism.Accord
5、ingtothehardnessdifferencebetweenhostmineralsandtheimpurities,heat-dresswayisgainedwhichispractical,economicalandeffectiveaftercuring.Thispapermainlystudyfivekindsofmagnesite,andfindouttheexistenceformsoftheinpuritiesinmagnesiteandtheorderlinessthattheexistencefo
6、rmsoftheinpuritiesreflectthedecompositionofmagnesite.Byselectingparticlesizeofrawmaterial,calcinationtemperatureandholdingtimetoexperiment,thereflectionofthethreefactorstomagnesitedecompositionandthedecomposedorderlinessofmagenistehasbeenlearned.Furthermore,itiss
7、tudiedtotheactivityofcaustic—burnedmagnesiathroughresearchingthefactorsrelatiQnship.Accordingtoalltheexperimentationwhathasstudiedthemagnesiteheatmechanism,aneffectivemethodforpoormagnesitehasgained,whichcanremovecalciumoxidewell,andapartofsilicaandalumina.Partic
8、lesizeofrawmaterial,calcinationtemperatureandholdingtimearethethreeimportantfacotorstomagnesiteheat·dress.Whenthesizeisatrangefrom3mmto5mmandholdingtimeisappro
此文档下载收益归作者所有