简介：Themethodconsistingofcoldtestandhotsimulatinghasbeenprovedtobereliablefordesigningpermeableele-ments.Thecarbon-magnesiamultiple-tubepermeableele-mentswhichareformedbyisostaticalpressurehavehigherdensity,highheatresistanceandgoodthermoshockresis-tance,Thebrickwork,maintenanceanderosionmeha-nismofpermeableelementswerestudied.Thetehnologyofcombinedblowingwaestablishedbasedonthepeculiari-tiesofsemi-steelrefiningatPanzhihuaIrom&SteelCo.(PZISC).Theservicelifeofpermeableelementsreahed600heats,thatmeansthepermeableelementscanworksynchronitiallywithconverterlining.

简介：IntheprocessofVHD,argonisblownintothemoltensteelthrouhttheporousplugswhicharemountedintheladlebottom.AnewtypeofporouscorundumplughasbeendevelopedfortheVHDsecondaryrefiningladlefurnaceinFushunSteelWorks,Itisfoundthatwhenthemeangrainsizeofcorundumarticlesdecreasesfrom760μmtp650μm,thephysicalpropertiesandservicelifeoftheplugarethesameasthatofimportedone,andcanbenormallyusedintheVHDprocess.

简介：Inordertoimproveargonblowingefficiencyina40tonladle,numericalsimulationandwatersimulationexperimentsofthebottomargonflowwereperformed.Relationshipsamongtheladlemixingtime,slageyearea,differentblowingflowrates,anddifferentblowingpositions(0,0.56R,0.62R,0.67R)arediscussed.Resultsshowedthattheladlemixingtimedecreasedwhentheargonblowingbrickdistance(frombottomcenteroftheladle)increased,anddecreasedsignificantlywhentheblowingflowincreasedfrom70to130L/h.Whentheblowingflowincreasedandexceeded130L/h,thestirringeffecttendedtobestable,andtherewaslittleeffectontheladlemixingtime.Theslageyeareaincreasedastheargonbrickdistanceincreased,andwaslargerwhentheargonblowbrickwasneartheladlewall.Wallshearstresssignificantlyincreasedasthebrickdistanceincreasedandwasconcentratedattheslagwallneartheargonflowbrick;thisiscalledthemostseriouserosionwall.Theaveragewallshearincreasedexponentiallywithincreasingargonblowingbrickdistance.

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简介：Anintroductionoftheongoingtechnologyofargon-blowingpurgingplugsinChinawaspresentedinthiswork.Gelpowderswereusedasstartingmaterialstoenhancethehightemperaturemechanicalpropertiesofthepurgingplugs.Compositepurgingplugadoptingextrusionformedgas-purgingbarandslithaditssurfacestructuraldesignimproved,whichenhancedtheresistancestothermalshockandmoltensteelpenetration,prolongingtheservicelife.Inaddition,thesafetywasgreatlyimprovedbyupgradingtheframeworkandproductionprocess,enhancingtheresistancetobreakout.Itisindicatedthatthedevelopingtrendistoproducepurgingplugsoflongerservicelifeandbettergaspurgingratewithdifferentstartingmaterialsandstructuredesignstomeettherequirementsofvariousmetallurgicalprocesses.

简介：在这份报纸，我们考虑下列非线性的椭圆形的问题：2u=|u|8n−4u+|u|q−1u，在里面u=u=0在∂ 上；一跳并且在Rn的光滑的领域，n∈{5,6,7}Rn，n∈{5,6,7}， ；是一个参数和q ∈]4/(n−4)，(12−n)/(n−4)[q ∈]4/(n−4)，(12−n)/(n−4)[。我们学习在二个点附近专注的答案。我们证明集中速度是一样的顺序和从对方的集中点的距离并且从边界被围住。为=()光滑的ringshaped开的集合，我们证实在二点专注的积极答案的存在指。最后，我们显示出那为>0，足够大，这个问题作为Ljusternik-Schnirelman范畴有至少许多积极答案。

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