转炉两步脱氧工艺研究_杜松林

　40　4　20054IronandSteelVol.40,No.4　April　2005杜松林(,243000)　:,CaC2+SiC、。,Q235、H08A、HRB335、SS400、ASTM1008w(O)10×10-6,w(Als)0.001%～0.003%。,mMnOnAl2O35SiO2,94.85%,20%～60%,6.97/t。:;:TF713.5　　:A　　:0449-749X(2005)04-0032-03ResearchonTwoStepDeoxidationTechniqueofConverterSteelmakingProcessDUSong-lin(No.3SteelmakingPlant,MaanshanIronandSteelCo.,Ltd.,Maanshan243000,China)Abstract:ThetwostepdeoxidationprocesshasbeendevelopedatMaanshanSteel,inwhichcheapermaterials,CaC2+SiCareaddedasdeoxidizer,firstlyattapping,thenAlwireisfedatcompositionadjustmentstation.There-lationshipbetweenw(O)andw(Si)andbetweenaddedAlandw(O),areillustratedandanalyzed.Basedonsuchinformation,appropriateamountofAlcanbedetermined.ComparingwithaddingFeMn,FeSi,Alinsequenceattapping(asonestepdeoxidationprocess),thisprocessisabletocontrolw(O)exactlyaround10×10-6,w(Als)intherangeof0.001%～0.003%forlowcarbonsteel,suchasQ235,H08A,HRB335,SS400,ASTM1008,andtoformliquidinclusionmMnOnAl2O35SiO2atcastingtemperature.Asaresult,thenozzlecloggingrateisre-ducedby94.85%andthecostofdeoxidationisreducedby6.97Yuanperton.Becauseofnon-aluminumdeoxida-tionattapping,w(N)inmoltensteelcanbereducedby20%～60%.Keywords:steelmaking;deoxidation:(1962-),,,;　　E-mail:[e-mail];　　:2004-07-26　　,FeMn、FeSi、Al()。:FeMn、FeSi;、,,w(O)、w(Als),,w(Als)0.003%,Al2O3。CaC2+SiC0.8～2.0kg/t,10～200m()[1～6]。,Q235、SS400、HO8A、ASTM1008、HRB335w(O)(35～45)×10-6,w(Als)0.001%～0.003%,mMnOnAl2O35SiO2,94.85%,6.97。1　生产条件与检测方法1.1　(1)50t;(2),;(3)140mm×140mm,+;,+。1.2　(1),ARL-4460C、Si、Mn、Als;(2)MULPI-AB-CELOX;4:(3),。2　试验结果分析与讨论2.1　(1)50tQ235、SS400,0.03%～0.08%,(400～1200)×10-6。0.0002,0.0025。,(350～1100)×10-6。,,w(O)、。(2),,、。0.8～2.0kg/t,FeMn、FeSi,,。(1)、(2)。,ΔG[1],CaC2、SiC。CaC2+3[O]=CaO+2CO(1)ΔG=-75300-37.51TSiC+3[O]=SiO2+CO(2)ΔG=-178430+10.41T1。(3)w(O)、w(Si),w(O)、w(Si)1。1,w(O)w(Si),w(Si),,w(O),;w(Si),w(O)w(Si),。1　Table1　Yieldofalloyelementsofdifferentdeoxidizationprocesses/%80.088.7/%90.093.11　w(O)、w(Si)Fig.1　Relationamongw(O),w(Si)andtemperature2　w(O)w(Als)Table2　w(O)andw(Als)fortwodeoxidizationprocessesw(O)/10-632.1～89.057.7～95.234.6～44.3w(Als)/%0.0010～0.0075≤0.0010.001～0.003　　,w(O)(2)。w(O),;w(O),。w(O)、w(Als)2。,,,,,,。,,,,w(O)。、,w(Si)、,10～200m/。2。(60×10-6)1×10-6,(80×10-6)0.75×10-6,30%。w(O)、,H08A、、ASTM1008,、,w(O)。2,,w(O)8.2×10-6,,w(Als)。33　402　Fig.2　RelationbetweentheamountofaddedAlandtheamountofdeoxidizedoxygen3　w(N)Fig.3　RelationbetweenaddedAlattappingandw(N)atcompositionadjustmentstation(4)w(N)w(N)3。3,w(N)。,w(N),w(Als)Q235、SS400w(N)(3～5)×10-6,w(Als)(20～30)×10-6。2.2　(1),。[1],w(Si)、w(Mn)w(Al),。,、()w(O),。w(O)(35～45)×10-6,w(Als)0.001%～0.003%(2),。,,MnOAl2O35SiO22MnO2Al2O35SiO2,。(2)w(O)w(Als)。w(Als)0.003%,Al2O33　Table3　Nozzlecloggingratefortwodeoxidizationprocesses/%1.360.07,w(Als)0.006%。,,w(Als)0.001%～0.003%。,,。3。2.3　(1),,。(2),,1、4。,,,1998()1.54%2002()0.48%。2.4　(1)0.8～2.0kg/t,Q235、SS400w(Si)8%～10%,w(Mn)1%～3%,FeSi0.52kg,FeMn0.51kg,2.465/t。(2),8～30kg,10～50m(H08A、ASTM1008),300g/t,4.5/t。3　结论(1)CaC2+SiC,,FeMn、FeSi、Al,12.19/t。(2)Q235、HRB335、SS400w(O)8.2×10-6,10×10-6。(3),w(Als)0.001%～0.003%,mMnOnAl2O35SiO2,94.85%。(38)34　40(2),(12),,。,()40m3/t。,,。,。①τe+τCτO,,。②τe+τCτO,。,,,;,。,,。3　结论(1),。(2)。100t,31%+69%。31%,。5500m3/h,55MW,。(3),。:[1]　　,,　.[J].,2003,38(6):70-73.(FUJie,LIJing-she,LIJing.Devel-opmentofModernEAFTechnology[J].IronandSteel,2003,38(6):70-73.)[2]　BurgmannW.ScrapPreheatingShaftFurnacesDevelopmentandResults[J].SteelTimesInternational,1995,(1):16-17.[3]　,　,　.100t[J].,2004,39(5):16-19.(WANGXin-jiang,FUJie,LIJing.AnalysisofPowerConsumptionon100tACShaftE-lectricArcFurnace[J].IronandSteel,2004,39(5):16-19.)[4]　HonjoH.CharacteristicsofScrapPreheatingbyShaftTypePreheater[J].DenkiSeiko,1997,68(1):13-20.[5]　,　,　.[J].,2003,38(6):25-28.(XUYing-tie,FUJie,LIJing.Ther-malCharacteristicsofScrapPreheatinginFingerShaftFurnace[J].IronandSteel,2003,38(6):25-28.)[6]　.()[M].:,1997.(34)(4),,w(N)20%～60%。(5),,1.06%,。:[1]　.[M].:,1990.[2]　.[J].,1998,(6):44-45.(WUYao-guang.EffectandAnalysisofCompoundDeoxidizerUsedasFinalDeoxidizerinSteelmak-ingProcess[J].Steelmaking,1998,(6):44-45.)[3]　.[J].,2000,21(4):34-38.(HANNai-chuan.StateoftheArtsofDeoxidizingProcessandProposalforImprovingProcessatPanzhihuaSteel[J].IronandSteelVanadiumTita-nium,2000,21(4):34-38.)[4]　.[J].,2003,24(1):21-24.(LIGui-jun.DevelopmentofNon-AluminumDe-oxidizingTechnologyforRailSteel[J].IronandSteelVanadi-umTitanium,2003,24(1):21-24.)[5]　.[J].,2002,(4):5-6.[6]　.80t[J].,2001,(2):25-27.38