rh處理過(guò)程鋼包鋼液流動(dòng)行為與碳濃度分布模擬研究

1、中圖分類號(hào)：—TF76—94學(xué)科分類號(hào)：—4503—020論文編號(hào)：H旦LG07—014密級(jí)：公玨河北理工大學(xué)碩士學(xué)位論文RH處理過(guò)程鋼包鋼液流動(dòng)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(xué)習(xí)單位：遙jE堡王太堂學(xué)習(xí)時(shí)間：盈星生提交151期：至QQ2生箜旦壁2目申請(qǐng)學(xué)位類別：王堂亟導(dǎo)師姓名：墓皇登整蕉論文評(píng)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(huì)主席：奎垂型塾撞關(guān)鍵詞：RHMFB；數(shù)值模擬；流場(chǎng)：混勻時(shí)間；碳濃度分布唐山河北理工大學(xué)2007年4月河北理I=大學(xué)碩士學(xué)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