高碱度烧结矿的矿物组成与矿相结构特征

42120071IronandSteelVol.42,No.1January20071,1,2,3,4(1.,100083;2.,271104;3.,201900;4.,114001):X,(w(CaO)/w(SiO2)=1.842.11),,,,,,2,Al2O3,:;;:TF046.4:A:04492749X(2007)0120017204MineralogicalCompositionandMicrostructureofHighBasicitySintersGUOXing2min1,ZHULi1,LIQiang2,SHENHong2biao3,ZHOUMing2shun4(1.SchoolofMetallurgicalandEcologicalEngineering,UniversityofScienceandTechnologyBeijing,Beijing10083,China;2.SinteringPlant,LaiwuSteelCo.,Ltd.,Laiwu271104,Shandong,China;3.TechnologyCenter,BaoshanIronandSteelCo.,Ltd.,Shanghai201900,China;4.TechnologyCenter,AnshanIronandSteelCo.,Ltd.,Anshan114001,Liaoning,China)Abstract:MineralogicalcompositionandmicrostructureofhighbasicitysintersofLaisteel,Baosteel,Ansteel,andJiusteelwereinvestigatedbyX2raydiffraction,opticalmicroscopyandscanningelectronmicroscopy.Itwasfoundthatthehighbasicitysinterwithw(CaO)/w(SiO2)=1.842.11ismainlycomposedofhematite,magnetite,calci2umferrate,andcalciumsilicate.Thehematitearerhombicandofautomorphiccrystalsandsmallquantityofallotri2omorphiccrystalsinterfacedwithcalciumferriteobviously.Themagnetiteisgranularandofallotriomorphiccrys2tals,cementingwithcalciumferritetoformcorrosionstructure.Calciumferrateismainlyofcolumnarandacicularform.Thecalciumsilicatearegranularorcolumnar,betweenwhichthecolumnaroracicularcalciumferritesareexisted.Inaddition,theincreaseofAl2O3contentinthebindingliquidphaseofhighbasicitysintersisusefultopro2moteformationofacicularcalciumferrate.Keywords:highbasicitysinter;mineralogicalcomposition;mineralogicalstructure:(19592),,,;E2mail:[e-mail];:2006202228,,[14],,,,,,,,1,,1,SiO23190%7152%,R=w(CaO)/w(SiO2)118421112:01075mm,M21X2SRAX,X(=0115406nm),1090,5/min,X©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(TFe)w(FeO)w(SiO2)w(CaO)w(MgO)w(Al2O3)R58.669.303.908.242.121.352.1159.477.554.258.201.271.291.93()58.497.904.609.702.300.502.1151.759.167.5213.872.001.401.84,;,,21X,X,PDF,2X,SiO2,2,,,,SiO2CaO,CaO8124%,CaO13187%,SiO2CaOSiO2Fe2O3,2,CaOSiO2CaOFe2O3,,,CaOFe2O3,,,,,24,,,,,241;2;3;414XFig.1X2raydiffractionpatternsoffourhighbasicitysinters,,,,,,1,Al2O3,SiO2,3,Al,Al2O3,[5-6];,SiO2,CaO,,2,Al3+,Fe3+,Ca2+,Si4+O2-,,,,,;,,,81©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(a)(b);(c)(d);(e)(f);(g)(h)24Fig.2Microstructuresoffourhighbasicitysinters(a);(b)3Fig.3SEMmicrographandEDXanalysisforacicularandcolumnarcalciumferriteinLaiwuSteelSinter(49)91©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(2),,:[1].[M].:,1996.61[2].[M].,1983.[3].[M].:,1996.[4],.[J].,1991,(1):43247.(WUShao2min,FENGJian2sheng.BaosteelDataMin2ingSystem[J].BaogangTechniques,1991,(1):43247.)[5].KDD[J].,1993,(3):27231.(FENGJian2sheng.KDDanditsApplications[J].BaogangTechniques,1993,(3):27231.)(19)3(1)(2),;,;,2(3)CaO,,Al2O3,:[1]MaedaT.RelationshipBetweenReducibilityandMicrostruc2tureofSynthesizedSinterofFe2O32BinaryCalciumFerrite[J].ISIJInternational,1986,26(10):B306.[2].[J].,1993,18(2):7212.(QINFeng2jiu.InfluencesofMicro2scopicStructureandMineralogyonTheirMetallurgicalProp2erties[J].SinteringandPelletizing,1993,18(2):7212.)[3],,.—ÓŸy‘yAl2O3[J].,1992,78(7):105321060.[4],.[M].:,2000.[5]GuoXingmin,DuHegui,T.Maeda,etal.EffectofAl2O3Con2tentonCalciumFerriteFormation[C].ICSTI94.Sendai:TheIronandSteelInstituteofJapan,1994.[6].[M].:,1999.94©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.