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铝钢复合（完整版）实用资料(可以直接使用，可编辑完整版实用资料，欢迎下载）Ontheotherhand,blastratedecreaseswiththeincreaseoffurnacevolumebecausefuelratedecreasewiththeincreaseoffurnacevolume,asmentionedinthefollowingsection.Therefore,thefeatureoffurnaceprofilevariationthatthethroatdiametertohearthdiameterratiooflagerfurnacesissmallerthanthatofsmallerfurnacesissupposedtocauseincreasesinthegasvelocitiesandtoincreasethepressuredropsatlargerfurnaces.Itshouldbenotedthatthetoppressureofthelargeblastfurnaceactuallytendstobehigherthanthatofthesmallblastfurnace.Thetendencyiseffectiveinreducingtheincreaseinthegasvelocitiesoflagerfurnaces.ThecomputationalresultsareshowninFig.16.Whilethethermalequilibriumerosionprofileofeveryfurnacevolumelookslike"thepotbasetype",theresidualthicknessofrefractoryatthesidewallandbottomdecreaseswiththeincreaseoffurnacevolumeandwiththeincreaseofproductivity,asshowninFig.17.Largerfurnacesareunderthesevereheatconditionbecausethesurfaceareatovolumeratiooflagerfurnaceislowerthanthatofsmallerone.4-1-3.Fuelrate.AsshowninFig.14,theheatlossratiodecreaseswiththeincreaseoffurnacevolume,becausethesurfaceareatovolumeratiooflagerfurnaceislowerthanthatofsmallerone.Therefore,lagerfurnacesaremoreefficientinheatutilization.However,theeffectontheFig.14Effectoffurnacevolumeimprovementofthefuelonfuelrate.rateinnomorethan3kg/tHM,asthereisnonoticeabledifferenceintemperatureprofilesamongfurnacesofvariousvolumes,asshowninFig.11.Fig.15Verticalstressdistributioninthefurnace.4-1-4.Stressfieldinthepackedbed.Fig.15showstheverticalstressdistributionsinthefurnacesofvariousvolumes,whichareevaluatedwithoutgasfloweffects.Commonfeaturesinallcasesareasfollows.Intheshaftregion,whiletheverticalstressappliedatthecenterisalmostasmuchashydrostaticpressure,theverticalstressisrelativelylowatperipherybecauseofthefrictionwithwallandtheshapethatspreadsdownward.Ontheotherhand,inthelowerregionofthefurnace,theconcentrationofstressappearsatcenterofdeadman,whichthestressreachesthedoubleofthehydrostaticpressure,whilethestressisreleas
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