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200410October2004ResearchonIron&Steel5(140)No.5(Sum140)(,610069):,,DRINCuCrNiAsSn,:;w(N);;:TF741.8:A:1001-1447(2004)05-0053-05DRIASASUBSTITUTEOFSCRAPUSEDFORSTEELMAKINGINELECTRICARCFURNACESWANGHai-bing(ChengduIronandSteelCo.Ltd,PanzhihuaIronandSteelcorp.,Panzhihua610069,China)Synopsis:Inordertomeetrequirementsofproducingqualityandcleanlinesssteels,itissuit2abletouseDRIasasubstituteofscrapforsteelmakinginelectricarcfurnaces.ThispaperreviewsthecharacteristicsofDRIandpointsoutthatitsagoodmaterialtouseinelectricarcfurnacesteelmaking.ByusinghighpercentageofDRI,qualitysteelswithlowcontentsofN,Cu,Cr,Ni,As,Sn,etc.canbeproducedinEAF.Keywords:DRI;w(N);EAF;foamedslag:(1965-),,,,.1,,,,(),,2060,,,,,,DRI,,,,2,DRI,DRI,(),,,,HRI,DRIDRI[1](1),DRI10100mm,,;,,,(2)DRI35,,,DRI4.06.0g/cm3,(3),85%90%,,(90%95%)(4)w(C)DRIw(C)1.0%3.0%,95%85%(5),DRI,,DRI4%(6)DRI;0.010%0.030%0.010%,(7)DRI(45%70%),,[2]DRI,,,,DRI,,,()[2],,,1.5m,,,(),33.1,,DRI30%,,DRI,DRIDRI,DRI,,DRI,DRI,,,,,30%DRI,DRI,,,3.2,DRI;,,DRIDRI,10%100%DRI,,,DRIDRI,15401580,,;,,,2832kg/min1/21/3,,,,,DRI,,,CaOMgOSiO2FeO,2,w(FeO)10%15%MgO12%16%[4],MgO12%[5],35%DRI,,DRI100%DRI,[6]:(1)100kWh/t,DRI500kg/min;(2)200kWh/t,DRI1000kg/min;45(3),DRI2500kg/min;(4)1560,28003000kg/min;(5)1015tDRI,DRI1500kg/min;(6)510tDRI,DRI500600kg/min;1520t,8.7510.5t,70%,6.1257.35t,20t/h,30%,2.6253.15t,10t/h,1t4,DRI,,,,DRI,,,,,DRI,DRI,,,,CO,,5DRI5.1DRI,DRI,,,,,DRI,(,),,,,23,,,,,DRI,,,,DRI,150tDRI,DRI:93.2%86.3%w(C)1.17%w(S)0.0055%w(P)0.031%2.72%,430mm90.4%DRI,DRI20%,;DRI20%,;DRI50%,;DRI50%,50%DRI13min,DRI5.2,DRI,,,,,,DRI(95%),DRI,,,,,,DRISiMn,,DRI3:,1t1600530kWh;DRIw(FeO),1600FeO110kWh;DRI,1t1600385kWh,100%,1,DRI,,,2DRI100%65%,,1570,1.7[78],65%DRI,96%90%,1%,29MJ/t(8kWh/t),,10%30%DRI,DRI,55,30%,,11t:2;w(FeO)20%;DRI1.2%1.02.0.53.1.02100%(A)65%(B)DRI:DRI,,5.3DRI,,m(CaO)/m(SiO2)1.82.23(0.8,2)[9],2%,35.4,:=M/(MX1+MDRIX2)MMMDRIDRIX1X2DRI()DRIw(FeO)w(C)DRI[93.2%,w(C)1.2%,w(S)0.005%,3.6%,93.5%]w(C)0.2%4DRI[10],DRI,DRI,[11]DRIDRI,DRI,,DRI,,,,w(C)w(C)0.2%,,,65DRI[12]4DRI:6DRI,,MJS,w(N)7010-612010-6[13]Georgetown75%DRIw(N)2010-6[14]Nuqisa,,,w(N)9110-6,46%DRI,w(N)6310-6100%DRI60%DRI100%3EAFBOFDRICrNiCu,,1Sidbec-Doscow(N)1%w(Cu)w(Ni)w(Cr)w(N)/10-6100%DRI0.020.020.052060%DRI0.100.050.0550100%0.200.070.0870BOF0.030.020.0225,100%DRIw(N)BOF,DRI,,,w(N),,,100%DRI,DRIw(S),,w(N),,DRI,,;w(N),DRIDRI,7(1),,CrNiCuAsSn,,(2)30%DRI,;30%DRI,,(3)DRI,,(4)DRI,DRI,,,[][1].[M].:,1993,181.[2]WolfgangPietsch.Storage,ShippingandHandingofDirectRe2ducedIron[J].SME-AIMEFallMEETING,1976,(9):12.[3]RigandM.,MarquisA.,DancyT.ElectricArcFurnaceSteel2makingwithPrereducedPellets[J].Ironmaking.andSteelmaking,1976,3(6):366371.[4]H.L.Bishop,H.N.Lander,N.J.Grant,etal.EquilibriaofSulfurandOxygenbetweenLiquidIronandOpenHearthTypeSlags[J].MetallurgicalTransactionsofAIME,1956,206(7):862868.[5]D.A.mlingJ.SittardandW.Resch.UseofDolomiticLimeintheElectricArcFurnace[J].StahlundEisen,1978,98(24):12811286.[6].150t[J].,1998,(2):3738.[7]AmelingD.,RudolphG.,ElsnerE.,etal.NewResultsObtainedintheOperationofUHPElectricArcFurnaceScrapandSpongIron[J].Fachber.Huttenprax.Metallweitervcrarb,1976,(10):839852.[8]ElsnerE.,KnappH.,VossH.NowResultsObtainedintheOper2ationofUHPElectricArcFurnaceScrapandSpongIron[J].StahlundEisen,1974,94(26):13221330.(61)751MgSSw(S)/%w(S)/%/kgS/%1100%Mg0.02870.00670.71077250%Mg+50%Al2O30.02590.00630.43076350%Mg+50%Ca(OH)20.02040.00610.39070450%Mg+40%CaO+10%CaF20.02620.00460.55682550%Mg+50%CaO0.02690.00450.550832/(t-1)/N23.1%6.2%/2.640.180.424.955.2410.5/6.912.22.640.180.424.95//268.32270.032.640.180.424.95///1.71(2),CaO,(3),(4),(5),Mg,(6),7WTO,,,,,,,,,,100%,,,,,[][1].[J].,1999,11(1):48.[2].[M].:,1996.[3].[M].:,1996.[4].[M].:,1992.[5],.[J].,1999,(7):35.[6],,.[M].:,1992.[7].[J].,1995,11(6):6165.(:2003-11-15)(57)[9].[J].,1997,4:38.[10]OttmberH.,OerterA.,SchmeiduchG.,etal.TheUseofLig2niteReducedMetallizedPelletsinElectricArcFurnaceforSteel2makingatRoehrenwerkeBous[J].StahlundEisen,1976,96(3):106112.[11]MeyerK.,PostG.ProcessTechnologyofSteelmakingfromSpongeIronintheElectricArcFurnace[J].StahlundEisen.1973,93(5):194204.[12]TuckerH.,TartaronF.,GoldsteinH.ElectricArcFurnaceSteel2makingwithSpongIron[J].BlastFurnaceandSteelPlant,1968,56(12):10701084.[13]RonaldoS.Sampaio,etal.TheBrazilianExperienceinUtilizingLargeProportionsofColdPigIroninEAF[M].proceedingsofthe5thEuropeanElectricSteelCongress,1955.[14]RobertL.Bullard,StevenR.Resler.TheUseofDRIintheElectricFurnacesatGeorgetownSteelCorporation[M].proceedingsofthe5thEuropeanElectricSteelCongress,1995.(:2003-12-20)16