石煤提钒湿法工艺的动力学研究Ξ

X,(,411105)[],,,,,.:;;;:TQ522.59:A:10005900(2005)02010404LeachingKineticsofExtractionofVanadiumPentoxidefromStoneCoalZHANGXiao-yun,TIANXue-da(ChemicalEngineeringCollege,XiangtanUniversity,Xiangtan411105China)AbstractThekineticsoftheleachingprocessofvanadiumpentoxidefromstonecoalwithH2SO4andFeSO4wasin2vestigated.Thekineticequationofdissolutionreactionwasderived.Onthebasisoftestdataandkineticequation,thecontrollingstepwasjudgedassolidmembrancediffusion-controlledstep.Temperatureandsizearemainfactorsthatin2fluencereactionrate.Thereactionratecanbeimprovedatahighertemperatureandwithfinersizes.Keywords:stonecoal;vanadiumpentoxide;leaching;kinetics.-,NaCl,NaCl2040,,V2O545%,[1].[2,3].CaCO3,CaO6%8%,9503h,.Ca(VO3)2,CO2CaCO3,[4].,,HCl,[5].11.1,,.1.1Tab.1CompositionofstonecoaltestedV2O5CSiO2Al2O3Fe2O3CaOMgOP2O5SP%0.971.108.013.050.528.50.820.750.700.252.501.2,,,.,,.VOSO4V2O4(VO)2+;V2O5,,,..,(FeSO4)27220056NaturalScienceJournalofXiangtanUniversityVol.27No.2Jun.2005X:20040825:(03ZRY3039);(02SSY3038):,(1971),,,.E-mail:[e-mail]©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[6].,..2.1,V2O5(S)+H2SO4(aq)=(VO2)2SO4(aq)+H2O(l).(1),:a)(H2SO4-FeSO4)();1Fig.1Nucleuscontractmodelofstonecoalparticlea.;b.;c.;Co:;Cs:;Cs:;1:;2:b)();c).;d),;e)VOSO4().:1:,:1=D1(C0-Cs)P1D1:(25,D110-510-6cmPs);1:(1).(C0-Cs)=11PD1(1)2:,:2=D2(dcPdr),D2:;dcPdr:.,:Cs-Cs=11PD2(2):Cs:.3:,,:Cs-C(D)sk+Pk-=3Pk(3),k+k-:;C(D)s:VOSO4.4:VOSO4:(D)4=D2(C(D)s-C(D)s)P2(4),C(D)s:VOSO4;D2:VOSO4.2.2,,,.(FeSO4)5012©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[7].2.2Fig.2SketchmapofleachingprocessJ,J=v2S=SD2dCdr(5),D:;V2:;J:;S:.(5).2.3:,,.2.3.1,,,:,,,,,,,.,,,.,H2SO4-FeSO4.50g0.074mm,100mL.3.3H2SO4-FeSO41.V=50rPmin,[H+]=0.1molPL,[]=0.01molPL,t=95;2.V=150rPmin,Fig.3EffectofleachingtimeonrecoveryofV2O5atdifferentstirringrate4H2SO4-FeSO4Fig.4KineticcurvesofV2O5dissolutionfromstonecoalwithH2SO4-FeSO41.y=1-(1-h)1P32.y=1-2hP3-(1-h)2P33,,.12,,H2SO4-FeSO4,.2.3.2[8,9],,,.,,y=1-2hP3-(1-h)2P3(h)t,.,,y=1-(1-h)1P3t,..25,H2SO4-FeSO40.074mm50g4.4,1,;2,.6012005©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[1].[M].:,1993,63-67.RenShi-jue.Ahandbookfordevelopmentandutilizationofmineralsresources[M].Wuhan:PressofWuhanUniversityofTechnology.1993,63-67.[2],.[J].,2003,25(1):43-56.ZhengXiang-ming,Zhangxiao-yun.Anewtechniqueofleachingvanadiumpentoxidefromstonecoal[J].NaturalScienceJournalofXiangtanUniversity,2003,25(1):43-56.[3],.[A]:[].,2003.ZhengXiang-ming.Studyontechniqueofrecoveringvanadiumpentoxidefromstonecoal[A]:[MasterThesis].XiangtanUniversity,2003.[4],.[J].,2000,2(3):290.ZhangZhong-hao,WangYan-heng.Roastingtechniqueofsilicolitevanadiumorewithcalcitesalt[J].ChemistryWorld,2000,2(3):290.[5]AllenJ.bard,Encyclopediaofelectrochemistryoftheelements[M].NewYork:MarceiDekker,Inc.,1976,307.[6].[J].,1999,2(1):16-18.ShenXiao-qing.Studyontechniqueofrecoveringvanadiumfromacidleachingliquor[J].HebeiChemicalIndustry,1999,2(1):16-18.[7].[M].:,1988.ZhangFan.Extractiondynamics[M].Beijing:AtomicEnergyPress,1988.[8].[M].:,2002.LiHong-gui.Hydrometallurgy[M].Changsha:PressofCentralSouthUniversityofTechnology,2002.[9].,[M].:,1998.(103)[1]BrauerGM,KumpulaJW,TerminiDJ,etal.Durabilityofthebonebetweenboneandvarious-cyanoacrylatesinanaqueousenviroment[J].JBiomedMatRes,1979,13:593.[2]JaffeH,WadeCWR,HeggelIAF,etal.synthesisandbioevaluationofalkyl-cyanoacryloylglycolatesaspotentialsofttissueadhesive[J].JBiomedMatRes,1986,20:205.[3]GrisdalEJ.Theuseofcyanoacrylatesinperiodontaltherapy[J].JCanDentAssoc,1998,64:632.[4]RicciB,RicciF,Octyl-cyanoacrylatestissueadhesiveinexperimentalscleralbuckling[J].ActaOphthalmolScand,2001,79:506.[5]RichardWD,JamesWG,LindaAC.Useofcyanoacrylate(superglue)forthefixationandprefabricationofnasalcartilagegrafts[J].AestheticSurgJ,2001,21:328.[6]AkioM,KengoT,MasashiK,etal.Isthecyanoacrylateanalogue,2-octylcyanoacrylate,apromisingtreatmentforgastricfundalvarices[J].GastrointestinalEndoscopy,2004,60:1039.[7]DanielSR,KennethFB.Apilotstudyof2-octylcyanoacrylateinjectionfortreatmentofgastricfundalvaricesinhumans[J].GastrointestinalEndoscopy,2004,59:553.[8]TarikZN,RksanA,SemaB,etal.Theeffectoftissueadhesive,octyl-cyanoacrylate,onthehealingofexperimentalhigh-riskandnormalco2lonicanastomoses[J].AmJSurg,2004,187:28.[9],.[J].,1999,17:33.LiJingfeng,SunXiping.Thepreparationtechniqueandapplicationof-cyanoacrylateadhesive[J].ChineseJournalofcolloidandpolymer,1999,17:33.7012©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.