锆英石精矿制取高纯锆产品研究

,,(330031):,N235,,,:;;:TF84114;TF111133:A:1007-7545(2007)05-0033-03StudyonPreparingHigh2purityZirconiumProductsfromZirconConcentrateZHOUXin2mu,DONGXue2ping,CHENHui2qin(DepartmentofChemistry,NanchangUniversity,Jiangxi330047,China)Abstract:Theinsolublematerialsofleachedzirconconcentrateistransformed,N235isusedtoextracttheimpurityfromthede2siliconaciddecompositionsolution1Theresultsshowthattheimpuritiessuchasiron,titaniumandsodiumhavebeenremovedandthepurityoftheproductisimproved,whilethewashingacidisalsoreduced1Keywords:Zirconiumoxychloride;Extraction;Impurityremoval:(1952-),,,,[1],,,,1111(%):ZrO261135SiO23415TiO20185Fe2O31124;N235;C72C9(ROH);N235EDTA2,234mol/L2,:(SOLAASM6)(8521)(pHS23C)722112(1)1Fig11Theflowsheetofprocess33()20075113,,pHS23CpH114,O/W=1,(301)20min,,,115,EDTA[2]2211,:125%130%,650700115210h,1670,12,,Na2SiO3Na4SiO4NaAlO2Na3PO4NaOH,Na2ZrO3Na2ZrSiO5212,,13,11(),22pHFig12TheconsumptionofacidandthestrippingquantityofZrO2indifferentpH2,pH3,,pH=2013%,,,,;pH2,pH=1113%,,,(FeCl3),,,,,pH2,,,pH2,Fe3O4,,,Fe3O420%21321311:25%N235215%ROH260%,O/A=1,(251)20min21312HCl3,,HCl43HClFig13ThesolubilityofZrOCl2inhydrochloricacid4HClFig14ThedistributingrateofZr4+,Fe3+,Ti4+inhydrochloricacid43()20075HCl4mol/L,,4,HCl0124mol/L21313HCl011mol/L,,HCl5116mol/LHCl99%,210mol/LHCl5HClFig15TheextractionrateofFe3+,Ti4+inhydrochloricacid21314HCl012mol/L6,Cl-,(016018mol/L)115118mol/LHCl,5mg/L,,O/A4112[3]6Fig16TheextractionyieldofFe3+,Ti4+insolutionofZrOCl221315N235,11Table1Thestrip2extractionexperimentresult(O/A)/%/%1210010011100100219916991831991299141:N235,,214,,515mol/LHCl,212mol/L9116%;116118210mol/L8710%8819%9011%,210mol/L,,,,,,,5156mol/LHCl,,010012%010007%01003%3(1),(2)N23522,,;;,,(3)110210mol/L5156mol/LHCl(39)53()200756Fig16Comparisonofthermalperformance3(1),,,,,(2),(3),,[1],,,.[J].,2003(6):12-14.[2],,,.[J].,2001(11):23-27.[3]DateAW.Predictionoffullydevelopedflowinatubecontainingatwistedtape[J].Int.J.HeatMassTrans2fer,1974,17:845-859.[4]SahaSK,DuttaA.Frictionandheattransfercharacter2isticsoflaminarswirlflowthroughacirculartubefittedwithregularlyspacedtwisted-tapeelements[J].Int.J.HeatMassTransfer,2001,44:4211-4223.[5].[D].:,2005.[6].[M].2,:,2001.[7]WebbRL,Eckert.Applicationofroughsurfacestoheatexchangerdesign[J].Int.J.HeatMassTransfer,1972,15:1647-1658.(35)[1],,,1[J]1(),2006(1):50-531[2],,1[J]1,2006,26(4):44-451[3],,,1[J]1,2000,52(2):57-60193()20075