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ID:33897454
大小:2.38 MB
页数:73页
时间:2019-03-01
《包头含稀土磁尾矿中稀土与氟的浸出及分离实验研究》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、万方数据东北大学硕士学位论文AbstractStudyofLeachingandSeparationofRareEarthandFluorinefromBaotouMagneticTailingsContainingRareEarthAbstractBayanobooreiSthelargestmixedrareearth(RE)oreintheworld,whichhasbeenminedasironore.alargenumberofREresourcesenterintothetailingsdaminthe
2、formoftailingsandcausegreatlossofresources.REmineralsinBaotoumagnetictailingsaremainlybastnaesiteandmonazite,accompaniedbyfluoriteandothernon-metallicminerals,andtheREgradeisabout7%.Therefore.itisnecessarytorecycleREfromthetailingsandimprovethecomprehensiveuti
3、lizationrateofBaotoumagnetictailingsresources.Atthesametime,thecontentofnon-REimpuritiesFinBaotoumagnetictailingsisSOhighthattheseparationofRE/Fisdifficultbecauseofitsstrongchemicalbindingcapacity,whichisthemostimportantreasonofenvironmentalpollutionandwasting
4、ofresources.Therefore,studyoftheleachingandseparationprocessconditionsofREandfluorinefromthemagnetictailings,exploringofthemethodforfluorineinhibitionandresourceS,provideatheoreticalbasisforthecomprehensiveresourcesutilizationandcleanproductionprocessfortheBao
5、toumagnetictailings.Thispaperisconsistedofthreeparts:Thesodiumcarbonateroasting·dilutesulfuricacidleachingprocessofmagnetictailingsandrecyclingFasresourceswerestudiedinthefirstpart.TheresultsshowthatthebestleachingratesforREandFreach100%whichcanobtainedatthefi
6、xedconditions:m(Na2CO3)/m(tailings)=0.3,mixtureroastedat700℃for1.Oh.1eachingby3.0mol‘L。1H2S04at60℃for1.Oh;theFintheacidlotionwasrecycledbyaddingAI3+andNa+,andthecryolitewaspreparedwiththerecoveryrateofF67.73%.It’SareasonablemethodIV万方数据forresourcetreatmentfluo
7、rinebecauseofhighapplicationvalueoftheproductwith1essimpuritiesandhighpurity.Thealuminiumsaltsanti.fluorinationactivation-SUlfuricacidleachingmagnetictailingswasresearchedinthissecondpart.TheresultsshowthatFinrareearthoreexistsintheformofAI-Fundertheconditiono
8、froastedat700℃for1.OhwhenusingA12(S04)3astheanti-fluorinationagent,andREarereleased,thenleachingby2.0mol‘L‘1H2S04at80℃about1.OhcanmaketheleachingrateofREachieves68.4%,andFcanallbel
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