包头含稀土磁尾矿中稀土与氟的浸出及分离实验研究

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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