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ID:52181958
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页数:6页
时间:2020-03-24
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1、Ironandsteelarethemostimportantrawmaterialsofmodernsociety.Theblastfurnaceistheblastfurnaceisalsoacomplicatedmovingbedreactorcomprisingmainlythreephases,solid,andliquid,andineludestemperatureregions・Intheupperportionoftheblastfurnaceburdenoperationisve
2、rykeylink[l].Itdirectlytheinfluencesthedistributionofgasflowandimproves・theutilizationratioofheatandchemicalenergy.Thesmoothandstableoperationenvironmentofblastfurnacecanbeobtainedonceareasonableburdensurfaceisformed,andgoodoperationenvironmentwilllead
3、totheultimategoalsofenergysavingconsumptionreductionaswellasthequalityofmolteniron[2]・Itisnecessarytoestablishanefficientburdendistributioncontrolbasedonsimulationmodelinordertofullymakeuseofitshighflexibilityforburdendistributioncontrol.Althoughconven
4、tionalmodelsbasedonthecontinuummodelhavebeenwidelyused,thesemodelsarenotsufficientfortherecentdemands.Discretemodelssuchasdiscreteelementmodel(DEM)andparticlemethodareexpectedtoenablepreciselysimulationofthediscontinuousandinhomogeneousphenomenainthere
5、centoperatingconditions・Withprogressincomputingcapabilityinrecentyears,ithasbecomepossibletoconstructthepackedbedstructureintheblastfurnacefrompositionalinformationinparticleunitsbyapplyingtheDiscreteElementMethod(hereinafter;DEM),whichisarepresentativ
6、ediscretemethod,anditisnowpossibletovisualizethesolidflowfromburdendistributionformationatthethroattotheuniformregioninthevicinityofthetuyeres.[3]Estimatingandpredictingthestackprofileofburdenofblastfurnaceinaradialdirectionoffurnaceordistributionofinc
7、linationangleareimportantforcontrollingOre/Cokedistributioninaradialdirectionofthefurnace.Latelywithdiversificationoftheburdendistributioncontrolmeans,therequirementstotheestimatingaccuracyofstackprofileattheperipheralzonehavebecomeseverer.ResearchbyKa
8、jiwaraetal.mentionedasthebeginningofapplicationofDEMtotheblastfurnace.Inthesmall-scale2-dimensionalmodel,DEMwasusedtoanalysisofparticlemotionduringtheburdendistributionprocessfromthebelltoptothroatzone,andtheresultswerecomparedwithexper
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