电渣重熔过程中氢含量的控制

4310200810IronandSteelVol.43,No.10October2008,,(,110004):,,,:;;:TF744:A:04492749X(2008)1020038204ControlofHydrogenContentinESRProcessGENGXin,JIANGZhou2hua,LIUFu2bin(SchoolofMaterialsandMetallurgy,NortheasternUniversity,Shenyang110004,Liaoning,China)Abstract:TheprimarysourceofthehydrogeninESRingotsisthehydrogenintheelectrodes,fluxmoisture,andwatervaporintheatmosphereduringremelting.ThehydrogencontentofESRmetalcanbereducedmainlybydegasificationofthesteelforelectrodes,calciningthefluxesandreducingthepartialpressureofwatervaporinatmosphere.Keywords:ESR;hydrogencontent;slag:(19792),,;E2mail:[e-mail];:2008203206,,,,310-6(,),,210-6,([H]=12cm3/100g),;;,,M.Nishiwaki[1]510mm2400mm,110-6,11,1.1[2]1Fig.1Effectofhydrogencontentonflakedefects:(3.110-6)(1.92.0)10-6;,[3],22Mn213Cr25Ni20.25N,610-63.510-6L.RohdeD.Lohr[4]1340mm,10:,,11,ESR()Table1Hydrogencontentofelectrodes,ESRingotsofdifferentsteelgrades10-62.32.32.31.91.91.8Ca.%1.5Ni1.61.61.7CrMo551.51.5Ca.%1.5Ni1.21.21.2,,,1.2,,4%6%N1M1Chuiko[5],[2],22ESRFig.2ChangeofhydrogencontentduringESR2,800900(),500mm,,,500mm,,(),,,200mm,(),,,,,YutakaHirose[6],9006h,,33Fig.3Comparisonofhydrogencontentinfreshandrecycledslags1.3,,,,,,PH2O,[2,7],,PH2O,4(4f)4ESRFig.4EffectofwatervaporpressureonhydrogencontentofESRingot9343,[8],,([H]0),PH2O,55Fig.5RelationbetweenthewatervaporpressureandthehydrogencontentofESRingot(1)PH2O5([H]0)(w([H]0)0.310-6),PH2O[H]0,[H]0,w([H]0)0.310-6,1.310-6,4.810-63,:w([H]S)=PH2O+w([H]0)(1):w([H]S)ESR,10-6;w([H]0),10-6;PH2O,13313Pa;([H]0),(1)(2)2(H2O(g)):1:(H2O(g))2,H2O(g),2:2,H2O(g)+(O2-slag)=2(OH)-slag(2)H2O(g)(OH)-3:(OH)-24:(OH)-2:2(OH)-slag+Mi2+slag=2[H]metal+2[O]metal+[Mi]metal(3)5:2[H][O]2,3,,,32.1VDRH,[9],VD,(6617Pa)(20min),Ar,[H]1.510-6RH,,,[10],34,50%,,0.01mm110-6[11],2.2,,700,8h850,10h,200,,,,,,3,0410:80%70%40%,,2.3,3(1)(2)VDRH,,,(3),,(4),:[1]NishiwakiM,YamaguchiT,KobaM,etal.OperationofLargeBifilarESRFurnaceforSlabProductionandQualityofSlabsandHeavyPlatesProduced[A].ProceedingsoftheFifthInternationalConferenceonVacuumMetallurgyandElectroslagRemeltingProcesses[C].Munich:ChairmanoftheOrganisingandExecutiveCommittee,1976.197.[2],,.ESR´¤‚¤·[J].,1977,(13):2181.[3],,.[J].,2001,13(3):68.(LIHui,ZHANGJing2wu,ZHENGYang2zeng.EffectofESRonCryongenicToughnessofAusteniticSteel[J].JournalofI2ronandSteelResearch,2001,13(3):68.)[4]Rohde,L,LohrD.OperationalResultsofthe50tonESRPlantofThyssenHenrichshtteAG[A].ProceedingsoftheFifthInternationalConferenceonVacuumMetallurgyandElectroslagRemeltingProcesses[C].Munich:ChairmanoftheOrganisingandExecutiveCommittee,1976.177.[5]ChuikoNM.BehaviorofHydrogeninElectroslagRemelting[J].EnglishTranslationofMetallurgy,1977,21(7):454.[6]k,,,.™É·40tESR[J].,1977,(13):2208.[7]Ban2YaS,HinoM,NagasakaT.ThermodynamicsofCaO2BasedSlagforRefiningofHighPuritySteels[A].UltraHighPurityBaseMetals,UHPM294[C].Kitakyushu2City:TheJapanInstituteofMetals,1995.86.[8],.ESR™É[J].,1977,(8):1235.[9],.[J].,2006,(1):31.(GENGJian2lin,WANGHua.Discus2siononControlsofGasContentinSteel[J].NanjingSteelScience2TechnologyandManagement,2006,(1):31.)[10].[M].:,19931140.(ZHANGJian.TheoriesandPracticesofOut2FurnaceRefining[M].Beijing:MetallurgicalIndustryPress,19931140.)[11],,.200[J].,1991,26(7):22.(XiIANGDa2lin,ZHUXiao2wei,WANGKe2wu.HydrogenControlandHydrogenBehaviourin200tESRFurnace[J].IronandSteel,1991,26(7):22.)14