赤泥浸出萃取钪的工艺研究

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1、太原理工大学硕士学位论文赤泥浸出萃取钪的工艺研究姓名：于永波申请学位级别：硕士专业：有色金属冶金指导教师：陈津;王克勤20090501
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2、HNOLOGYOFLEACHINGANDEXTRACTINGSCANDIUMFROMREDMUDABSTRACTRedMudisawastematerialwhichisformedduringaluminaproductionprocess.Alotofemissionanddumpsofitincreasesthecostofalumina'anditalsohasbroughttremendousenvironmentalproblemsandsecurityrisks.Asakindoftypicalrarera

3、re-earthelementwhichcontainedinredmud,90T95%ofscandiumisoccurrencedinbauxiteXphosphoriteandironperovskite.BecauseithassomeoutstandingcharacteristicssuchashighchemicalactivityXgoodelectricalconductivityXsoftfeaturessuchaseasytobecutandsoon,madeitawiderangeofapplic

4、ationsinessentialareassuchaselectro-opticlightXastronavigationXelectronicsindustryXnucleartechnologyXsuperconductivitytechnologyandsoon.Therefore'fornon-ferrousmetallurgyofthecomprehensiveutilizationofsolidwaste'thestudyonrecoveringscandiumfromredmudhasaveryimpor

5、tantsignificance.TheobjectofthispaperisBayerredmud.ThechemicalcompositionofBayerredmudwasanalyzedcomprehensively,andusingthemethodofICP–MSXXRDXelectronprobeandsoon,thispaperstudiedthephysicalIII
 phaseofBayerredmudandthecontentofscandiuminthese.Studies

6、haveshowedthatduringtheprocessfromaluminitetoredmud,thecontentofscandiumincalciumnephelineXhydrationofgarnet,calcium-irongarnet,hydratedaluminumsilicateetcaluminumsilicatemineralphasewhicharenewphasesisverylow.Scandiumismainlydispersedintheisomorphismformofrutile

7、,ilmeniteandotherobjectsphase.Thronghdeterminingthecontentofscandiumwiththedistributionofredmudparticlesize,wefindthatthecontentofscandiumindifferentgrainofredmudisnotobviousregularityandspecificrichedphenomenon;Therefore,itisnotappropriatetoobtainredmudwhichcont

8、ainshighercontentofscandiumbythemethodofsieving.CombinedthebasisofstudyingphysicalandchemicalpropertiesofBayerredmud,throughorthogonalexperiment,whichstudiedth