rh精炼去除微小夹杂物冶金专业本科毕业论文设计.doc

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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

ABSTRACT
Withtheprogressofscienceandtechnology,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
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HYPERLINK\l"_Toc327101013"ABSTRACT PAGEREF_Toc327101013\hII
HYPERLINK\l"_Toc327101014"目录 PAGEREF_Toc327101014\hI
HYPERLINK\l"_Toc327101015"1文献综述 PAGEREF_Toc327101015\h1
HYPERLINK\l"_Toc327101016"1.1洁净钢的发展 PAGEREF_Toc327101016\h1
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