rh處理過程鋼包鋼液流動行為與碳濃度分布模擬研究

1、中圖分類號：—TF76—94學科分類號：—4503—020論文編號：H旦LG07—014密級：公玨河北理工大學碩士學位論文RH處理過程鋼包鋼液流動行為與碳濃度分布模擬研究作者姓名：鎏姐專業(yè)名稱：塑毯迨全研究方向：純逢塑生主理詮生王莖學習單位：遙jE堡王太堂學習時間：盈星生提交151期：至QQ2生箜旦壁2目申請學位類別：王堂亟導師姓名：墓皇登整蕉論文評閱人：墮墮單位：趕韭堡三盤堂壟壘生絲婆堂窶單位：——單位：論文答辯日期：至QQZ生鯉旦!

2、壘旦答辯委員會主席：奎垂型塾撞關鍵詞：RHMFB；數值模擬；流場：混勻時間；碳濃度分布唐山河北理工大學2007年4月河北理I=大學碩士學位論文AbstractDuringtheRHprocess，componentandtemperatureofmoltensteelarcinfluencedbycircularflowofmoltensteeldirectly，therefimngtimeandrefimngeffectarcalso

3、determinedbyit。AtpresentthetechniqueofIFsteelproductionusingRHMFBdegasserbelongedtoBaosteelisadvanccdincountrybutinordertousethetechniqueforultralowcarbonsteelproduction，itisnecessarytostudytheflowingandmixingofmoltenste

4、elandcarbonconcentrationdistributioninladleduringRHMFBvacuumdegassingprocessThe300tladleofRHdegasseristhoughtasthesubjectinvestigatedFromtheviewpointofcircularflowofmoltensteel，amathematicalmodelonflowingandmixingofmolte

5、nsteelisestablishedusingthecommercialCFDcodeCFXandtheinfl鵬nceofprocessandeqmpmentonflowingandmixingofmoltensteelisdiscussedOnthebasisofflowfieldandcombinedwiththedeearburizationmechanism，themathematicalmodelofcarbonconce

6、ntrationdistributi∞iSestablishedtoothedistributionandvariationofcarbonconcentrationduringdeearburizationprocessandtheinfluenceofprocessequipmentondeearbarizationreactionrateare枷analyzedTheresultsofflowfieldindicatesthat，

7、therearetwoprominentcirculationZOneSinladeoneisformedbetweendownlegandaplegtheotherisformedbefwcendownlegandladlewallNearmoltensteelsurfaceinthesecondcirculationzone，thevelocityofmoltensteelissmallerUndertheexistingcondi

8、tionthemixingtimeoftraceris255sWhentheprocessequipmentconditionwaschangedsuchasargonblowingfluxisincreasedto4000NLmill“。diameterofsnorkelisincreasedto800ramwhich啪impmvetheflowfieldofmoltensteelinladlegreatly，themixingtim

9、eCanhereduced25sand20srespectivelyButtheincreasingofsnorkelimmersiondepthdoesn’thelptoreducethemixingtimeobviouslyTheresultsofcarbonconcentrationfieldindicatesthat，atthebegin10minutesofdecarburizationprocess，thecarboncon

10、centrationofmoltensteeldecreasesfastAstheproceedingofdeearburizationthedecarburizationreactionratebecomesslowergraduallyAlthoughlitdifferenttimecarbonconcentrationintheregionnearthedownlegislowestrelativelycarbonconcentr