本科毕业设计---rh精炼去除微小夹杂物冶金专业.doc

第PAGE\*MERGEFORMATII页RH精炼去除微小夹杂物摘要随着科技的进步对钢的洁净度就提出了更高的要求。控制夹杂物就成为了一个重要的研究项目，作为炉外精炼有效手段的RH精炼的研究就非常必要了。主要阐述了洁净钢概况、RH技术的发展、RH精炼夹杂物概况和去除夹杂物水模实验研究。实验模型在几何相似比λ=1:4、聚丙烯作为模拟夹杂物和NaHCO3作为模拟CaCO3的模型上进行水模实验，研究了上升腿中提升气量、上升腿浸入钢液深度和向钢包中加入NaHCO3的量对去夹杂物的影响，得出结论如下：1）较大提升气量的去夹杂物效果好于较小提升气量的，但是存在一个最优值。2）从去夹杂物的角度考虑，浸入深度存在一个最优值。3）从去夹杂角度，并考虑成本和引入新杂质量等因素。4）实验中向钢包中加入NaHCO3对夹杂物的去除有所提升，去除率从78.26%提升到85.41%，去除率提升了7.15%。关键字：洁净钢；RH真空精炼；夹杂物；水模ABSTRACTWiththeprogressofscienceandtechnology,advancedindustrialproductsqualityofhigh-endincreasing,thecleanlinessofsteelputsforwardhigherrequest.Controlinclusionisanimportantresearchtarget,asaneffectivemeansrefiningoutsidethefurnaceofRHisverynecessarytostudy.Thispaperexpoundsthegeneralsituation,cleansteelRHtheprogressofthetechnology,RHrefininginclusionprofileandremovingwatermodelexperimentresearchinclusions.TheexperimentmodelinAnsteelthethirdfactory175tRH-TBastheprototype,thegeometricsimilarratio(λ)is1:4,polypropyleneassimulationinclusionandNaHCO3assimulationofCaCO3onmodelofwatermodelexperiment,theairoftheuplegintotheliquidsteelladledepthandaddtotheamountofNaHCO3togototheinfluenceoftheinclusion,drawtheconclusionisasfollows:1)largergasascensiontoinclusionworksbetterthanasmallergasascension,butthereisamos.2)ontheviewpointofinclusion,immersiondepthexistabestvalue.3)ontheviewpointofinclusion,andconsiderthecostandintroducingnewmiscellaneousqualityfactors,NaHCO3optimalinputsis120mol,equivalentto806oftheprototypedataismolCaCO3;4)addNaHCO3toladleintheexperimenttoremovetheinclusionshadincreased,fromtheremovalrate78.26%,risingto85.41%,removalrateup7.15%.Keywords:Cleansteel；RHvacuumdegasser；inclusions；NaHCO3；watermodeling目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc327101012"摘要PAGEREF_Toc327101012\hIHYPERLINK\l"_Toc327101013"ABSTRACTPAGEREF_Toc327101013\hIIHYPERLINK\l"_Toc327101014"目录PAGEREF_Toc327101014\hIHYPERLINK\l"_Toc327101015"1文献综述PAGEREF_Toc327101015\h1HYPERLINK\l"_Toc327101016"1.1洁净钢的发展PAGEREF_Toc327101016\h1HYPERLINK\l"_Toc327101017"1.