影响转炉低碳钢冶炼脱磷的因素分析

1,1,1,2(1.,430081;2.(),410000):2:;,,;,,:;;;:TF704.4:A:100121447(2008)0520009203AnalysisonfactorsaffectinglowcarbonsteeldephosphorizationinconvertersmeltingZHUOWei2wei1,LEIQiang1,WANGQing2xiang1,YINZhen2zhi2(1.KeyLaboratoryforFerrousMetallurgyandResourcesUtilizationofMinistryofEducation,WuhanUniversityofScienceandTechnology,Wuhan430081,China;2.No.3SteelmakingPlant,LianyuanIronandSteelCorp,Loudi410000,China)Abstract:Theoreticalanalysisandexperimentalresearchonfactorsaffectingdephospho2rizationbetweenmoltensteelandslagaredescribedinthispaper.Theresultsshowthatthephosphoruspartitionratiooftheslag2steelincreaseswiththeincreaseofoxidability,basicityofslag.Intheconditionofhigherbasicityofslag,theratiodecreaseswiththein2creaseofslagbasicity.Asregardtotheinfluenceoftemperatureontheratio,theratioincreaseswiththeincreaseoftemperaturetosomeextent.Intheconditionofhighertemperature,theratiodecreasestheincreaseoftemperature.Keywords:top2bottomcombinedblowingconverter;lowcarbonsteel;dephosphoriza2tion;influencingfactors:(1984-),,,,.w(P)0.02%0.05%,0.008%0.015%,w(P),(),,w(C)w(O)w(N),,,85%95%,,,1,,[1]:2[P]+5(FeO)=(P2O5)+5[Fe]-Q1(1)3(FeO)+(P2O5)=(3FeOP2O5)-Q2(2)9200810365ResearchonIron&SteelOct.2008Vol.36No.5(3FeOP2O5)+4(CaO)=(4CaOP2O5)+3(FeO)-Q3(3)(1)(2)(3)(4):2[P]+5(FeO)+4(CaO)=(4CaOP2O5)+5[Fe]-Q4(4)(4),,,1.1(FeO),;(P2O5)(3FeOP2O5),(FeO)(3FeOP2O5)1470,(4CaOP2O5)1.2CaO,4CaOP2O5,,,CaO,,CaO,,,,,,1.32:,,,,,,,;,,2,,2()190t,1,,2.1SPHESPHDCRML264,12,5min10min,,,,2LP,,2.22.2.1w(FeO)2111,w(FeO),LP,w(FeO),,,22.2.2222,R4.5,LP;R4.5,LPR,,,;R4.5,LPR,4.5,,[2],,201362,14.5,22.2.32333,,,;1680,,,,,,;,1680,,,23(1)(2);,,4.5,(3);,,1680,[][1],.[J].,2002,(1):15.[2].[M].:,1984.(:2008203219)36%(OneSteelLtd.),36%630200818%,20072.072.449,200873%74.320078(SmorgonSteel)50%4(WhyallaSteel2works),2008440t,400t,2009600t()115,: