简介：ThispaperistodiscussthesensingcharacteristicsofSnO2semiconductorcomponentsinwhichPr6O11isadded.Whenexperimentingunder11gasesofCH3COCH3,C2H5OH.C6H5CH3,H2,NH3,CO,CO2CH4,C4H10,n—C6H14andn—C7H16,wefindthatthecomponentshaveselectivitytoCH3COCH3,C2H5OHandthattheidealamountofPr6O11inthecomponentsisaboutI.Owt%.TheexperimentsalsoshowthatwiththeincreaseoftheamountofPr6O11,theidealworkingtemperature,theresponseandrestorationtimedecrease.

简介：Anincreasingnumberofannealingfurnaceshaverecentlybeenusingcheaperandcleanernaturalgas(NG)insteadofliquefiedpetroleumgas(LPG)asfuelgas.However,thefuelgasofthefurnacesoftenneedstobechangedwhenNGsupplyisnotadequateorwhenLPGbecomescheaper.Usually,changingthefuelgasinvolveschangingvariousequipmentaswellascontrolparametersforinstrumentsandthecontrolsystemandhenceistimeconsuming.Therefore,itisimportanttodevelopaquickprocessforchangingfuelgas.Thisstudydiscussesthetechniquesforquicklychangingfuelgasinanannealingfurnace.Thesetechniquesdealwiththedesignofthepipe,valveandburner,theselectionoftheflowmeterandtheflowcontrolvalve,theswitchofthesoftwareandparametersforthecontrolsystem,aswellastheoperation,commissioningandhottestofthefurnacewhenthefuelgasischanged.Usingthesetechniques,itispossibletochangefuelgasin6h.

简介：Thelimestone-gypsumfluegasdesulfurization(FGD)processhasbecomethemostwidespreadprocessintheworldforsulfurremoval.Theswirl-et-absorbingwetlimestone-gypsumsinteringFGDtechnologywasdevelopedforsinteringfluegasdesulfurization,andthisprocessproducesvolumesofwastewaterwithvariouscontaminantsthatrequirestreatmentbeforedisposalorreuse.Inthisstudy,thewastewaterqualityfromthreedifferentsinteringFGDsystemsatBaosteelGroupwasinvestigatedandcomparedwithwastewaterfrompowerplantFGD.AtreatmentprocesswasproposedwhichissuitableforsinteringFGDwastewater.Aftertreatmentwithaneutralization,coagulationandsedimentationprocess,heavymetalsinthesinteringFGDwastewaterwerereducedtoalevelmeetingtherelevantemissionstandards,butthepHandammoniaconcentrationweretoohigh,andafurthertreatmentprocesswasneeded.DuetocertainsimilaritiesandcomplementaritiesbetweensinteringFGDwastewaterandcokingwastewater,itisentirelyfeasibletomixthepretreatedsinteringFGDwastewaterintoabiologicalcokingwastewatertreatmentsystem.ThisstudyindicatesthatitisentirelyfeasibletomixpretreatedsinteringFGDwastewaterintothebiologicaltreatmentsystemsusedforcokingwastewaterfromtheironandsteelindustries.

简介：TheAODisbyitsverynatureandpurposealargegeneratorofCO2.ThetotalCO2emissionfromtheprocesscanbedividedintotwoparts-thedirectpartwhichisproportionaltothecarbonremovalfromthemetalandtheindirectpartwhichisrelatedtotheconsumptionofadditivessuchasreductionagents,slagformersandalloys.TheproductionoftheadditivestypicallyrequiredforaheatcauseslargeemissionsofCO2,infact,oftenlargerthanwhatisgeneratedfromthedirectpart.Byapplyingareal-timeadaptiveoptimizationoftheoxygentoinertgasratiooversmalltimeincrements,theoverallcarbonremovalefficiencyisincreasedwhiletheconsumptionofreductionagentsandslagformersaredecreased.ThisremovesunnecessaryproductioncostsandminimizesthetotalemissionofCO2.Inthispaperaprocessconceptwithoptimizedgasadministrationoveralargenumberoftimeincrementsiscomparedwithamoretraditionalprocesspractice.TheworkisbasedonindustriallyprovenprocessmodelsintegratedintheUTCASsoftwarepackageforconvertermanagementandcontrol.Finally,thispaperconcludesonhowthesuggestedprocesscanbeappliedinactualplantoperation.

简介：Thispapershallshowaneconomicfeasibleapproachtoimplementgreenhousegas（GHG）reductionmeasuresintosteelcompanies.ThegoaltoimproveenergyconsumptionisdirectlylinkedtothereductionofGHGemissionsandthereforedirectlyincorrelationwiththeeconomicviability.Abaselinescenariooftheconsideredreferencesystemandoftherespectivereferenceyearhastobedefined,mappedandanalysed.Inasecondstepananalysisofthesameoperationusingavailableandprospectedbestavailabletechnology（BAT）processesiscarriedouttogenerateabasisforabenchmarksystem.TheidentifiedreductionpotentialsarereportedandtheGHGemissionreductionsareputintorelationtotheinvestmentcostofthenewprocesstechnologies/processadaptiontobeimplemented.ThiseconomicfeasibilitycalculationisnecessarytorealiseacostefficientGHGreductionroadmapimplementationintothecompany’sbusinessoperations.TheGHGreductionroadmapisdevelopedusingtheabatementcurveconcepttogetanindicationof'lowhangingfruits'andforestablishingasequenceforimplementingcarbonemissionreductionsmeasures.ThescopeofthatapproachcanbeextendedbyincludingfurtherimportantenvironmentalparameterslikeNOx,SO2,CO,dust,heavymetalemissionsinairaswellasproductionresidues.ThatgivesintheendabroaderpictureandmorestartingpointstoimprovetheoverallenvironmentalperformanceofsteelproducingcompaniesbeyondtheGHGemissionsandenergyconsumption.

简介：TheresearchbackgroundandtechnicalfeaturesofBaosteelsinteringfluegasdesulphurization(FGD)—swirl-jet-absorbingwetlimestone-gypsumsinteringFGDtechnology,processandequipmentareintroducedinthispaper.MaincontentsandachievementsofthepilotexperimentandtheengineeringpracticeofBaosteelFGDareanalyzedanddiscussedsystematically.PastengineeringpracticeexperiencesindicatethatBaosteelFGDhasthefollowingmerits:wideapplicabilitytosinteringfluegasfeatures,suchasfrequentlychangingtemperatures,unstableSO2concentration,intensivelyfluctuatingflowrates,etc.,highpollutantsremovalefficiency,lowinvestmentandenergyconsumption;stableandreliableoperation,utilizablebyproduct(gypsum),etc.ItindicatesthatBaosteelsinteringFGDisofextensiveapplicationvaluefortheFGDoflargeandmedium-scaledsinteringmachines.

简介：Becauseofthelowtemperature,largewastegasvolume,highpollutantcontent,andcomplicatedcompositions,wasteheatrecoveryandemissiongastreatmentofsinteringfluegashavealwayspresentedachallengeinthesteelindustry,andthisissuehasattractedwidespreadattentionbothlocallyandabroad.Recently,basedonthefirstdomesticpilotplantanddemonstrationproject,Baosteelhasperformedaseriesofinnovativeresearchanddevelopmentinvestigationsonitssinteringfluegasrecirculating(SFGR)process,inwhichthesystemdesignandoptimization,dioxin-relatedcontaminantsourcesuppression,orematchingstructureoptimization,wear-resistantdesignofcyclingfansandpipelines,high-efficiencydustremovalequipment,systemcontrolandstableoperationstrategy,fluegasmixingandswitchingcontrol,circularhoodsealing,oxygencontentconditioning,recirculationsinteringsystemprocesscontrol,andmodeldevelopmenthavebeenstudied,andacompletesetofequipmentandtechnologyfortheSFGRprocesshasbeeninitiallydeveloped.TheinvestigationresultssuggestthattheSFGRprocesscannotonlysignificantlyreduceexhaustgasvolumeandpollutantemissionsbutalsorecoverlow-temperaturewasteheatandreducetheenergyconsumptionofsintering;therefore,theoveralltechnologiespossessgreatvalueinenergysavings,pollutionemissionreduction,andsinteringorequality/yieldimprovement.

简介：Thecharacteristicsofthedesulphurizedgypsumproducedinthefluegasdesulphurization(FGD)processoftheBaosteelsinteringplantareinvestigatedinthisstudy.Accordingtothetechnicalandqualityrequirementsofgypsuminthecementindustry,thefeasibilityofusingdesulphurizedgypsumasacementretarderisalsostudied.Theresultsshowthatdesulphurizedgypsumcanbeusedasacementretarderinsteadofnaturalgypsum.

简介：Inthisstudy,theeffectsofstandoffdistance(SoD)onthesupersonicflowfields(includinggasandparticleflowfields)duringcoldgasdynamicspraying(CGDS)areinvestigatedbymeansofcomputationalfluiddynamics(CFD).Thevariationofvelocity,temperature,pressureanddensitywithdifferentSoDiselucidatedthroughtheanalysisofthedistributionpropertiesoftheflowfields.Itisfoundthattheshockwavesinfrontofthesubstrateremarkablyinfluencethegasandparticleflowfields.Thewavesystemofexpansionwavesandpressurewavescomeintobeingcontinuously.ThevelocityofgasreachesthesupersonicspeedatthepositionoftheMachdisc,whileitdecreasessharplywhenthegasflowcrossestheMachdisc.TheoptimalSoDsare40mmfor1μmparticlesand50mmforboth5μmand22μmparticles.

简介：Thedifferencesofreductionbehaviorsbetweenironorelumpandpelletswerestudiedbyconductinglowtemperaturereductiondegradation,staticloadreductionanddroplettests.Thesetestssimulatedtheconditionsofreductiontemperatureandhydrogen-containinggasinCOREX.Duetoitsdensestructureandlowporositycomparedwithpellets,lumporepossessespoorreductiondegradationindex(RDI)andslowerreductionrateinearlyandmediumreactionstages,showingsignsoflowerstrength,lowersofteningandmeltingtemperatures,aswellasawidermeltingzoneandhigherΔP.Thatprovidessomebasistoexplainthephenomenaofdifferentialpressurerise,metallizationdeclineandmorestickingaftertheusageoflumporeinCOREXplant.

简介：316Lstainlesssteelcoatingswerepreparedbycoldgasdynamicspraying(CGDS)onacarbonsteel.Anewheaterofsprayedpowderswasaddedtothetraditionalfacility.Theresultsshowthatthecoatingqualityisobviouslyimproved,duetobetterinterfacebondingandreducedporosity.

简介：Withanalloycontentashighas80%ormore,Ni-basedOCTGisastrategicproductsrelatedtothestateenergysecurity,mainlyappliedintheexploitationanddevelopmentofsourgasfieldswithcomplicategeologicalformation,hightemperature,highpressureandseverecorrosivewellconditions.Ni-basedOCTGisregardedasthepipeproductwithmosthightechnologiesduetothecomplexityandgreatdifficultyinmanufacturingandrigorousrequirementsinqualitycontrol.Inthispaper,thetechnicalfeaturesandqualityrequirementsofNi-basedOCTGaresummarized,andthequalityandpropertiesoftheNi-basedOCTGproductsofBaosteelareintroducedindetail.WiththehelpofSEM,XPSandTEM,thecorrosionmechanismofNickle-basedOCTGintheenvironmentscontainingH2S,CO2,Cl-andelementarysuifurarealsoanalyzed.

简介：

简介：Inconel718superalloycoatingwaspreparedonamartensiticsteelsubstratebycoldgasdynamicspraying(CGDS).Microstructureandmicro-hardnessofthecoatingwerecharacterizedbymeansofscanningelectronicmicroscope(SEM),energydispersivespectrometer(EDS),andmicro-hardnessandnano-indentationtests.Theresultshaveindicatedthatthecoating’sthicknesscanreachmorethan300μm,andthereexistsagoodinterfacialcohesionbetweenthecoatingandthesubstrate.Thequantityandsizeofthedefectsatthebottom,middleandtopareasincreasegradually.ThereisnosignificantchangetotheoriginalmicrostructureoftheInconel718superalloyparticleaftertheprocessofCGDS;andanobvioustorsionaldeformationontheparticle’sprofileisproducedwhilelittledeformationatthecenterpartoccurs.Themicro-hardnessofthecoatingatthebottom,middleandtopareasdecreasesinturn.Comparedwiththebottomarea,themicro-hardnessofthemiddleandtopareasdecreasesbyabout10%and21%,respectively.Thenano-hardnessofthecoatingismuchlowerthantheoriginalparticle,whichdecreasesbyabout13.5%atthebottomareaand28%atthetoparea,respectively.Thedistributionofmicro-defectsisanimportantfactortothemicro-hardnessofthecoating.

简介：

简介：稀罕做地球的铜锰混合了氧化物催化剂被一起沉淀并且用铜硫酸盐，锰硫酸盐，和稀土元素的氧化物REO的机械混合准备(REO显示La2O3,CeO2,Y2O3,或Pr6O11)作为原料。样品被X光检查描绘衍射(XRD)，规划温度的减小(TPR)，氧化表面(s-TPR)的规划温度的减小，和规划温度的解吸附作用(TPD)。催化活动为水气体移动反应被测试。做稀土元素氧化物没改变原来的铜锰的水晶结构混合了氧化物，但是改变了interplanar间距，吸附表演和反应性能。与La2O3提高了这项活动，因为高铜分发和好减小，Cu-Mn的稳定性混合了氧化物。与CeO2和Y2O3也减少了到不同的度的样品的减小温度当在表面上改进Cu的分散时，这样，催化活动比undopedCu-Mn的好样品。Pr6O11-doped样品是困难的减少，表面铜的分散被降低，导致穷人活动。

简介：除铬、镍外，钼是不锈钢中最重要的合金元素。研究已证实，即使在海洋性大气中，仅靠铬，甚至铬量高达近24％也很难完全防止不锈钢的锈蚀，必须加入铝元素[12B]。但钼对不锈钢耐蚀性的有益作用的前提是钢中必须含有足够量的铬元素。

简介：AseriesofCe-Fe-Zr-O(x)/MgO(xdenotesthemassfractionofCe-Fe-Zr-O,x=10%,15%,20%,25%,30%)complexoxideoxygencarriersforselectiveoxidationofmethanetosynthesisgaswerepreparedbytheco-precipitationmethod.ThecatalystswerecharacterizedbymeansofX-raydiffractionandH2-TPR.TheXRDmeasurementsshowedthatMgFeO4particleswereformedandFe2O3particleswelldispersedontheoxygencarriers.Thereactionsbetweenmethanedilutedbyargon(10%CH4)andoxygencarrierswereinvestigated.SuitablecontentofCeO2/Fe2O3/ZrO2mixedoxidescouldpromotethereactionbetweenmethaneandoxygencarriers.Therearemainlytwokindsofoxygenofcarriers:surfacelatticeoxygenwhichhadhigheractivitybutlowerselectivity,andbulklatticeoxygenwhichhadloweractivitybuthigherselectivity.Amongallthecatalysts,Ce-Fe-Zr-O(20%)/MgOexhibitedthebestcatalyticperformance.Theconversionofthemethanewasabove56%,andtheselectivityoftheH2andCOwerebothabove93%,theratioofH2/COwasstableandapproachedto2foralongtime.

简介：Theeffectsofthesubstratetemperatureonthedepositionandmicrostructureofthe304stainlesssteel(SS)coldgasdynamicspraying(CGDS)coatingswereinvestigated.Itwasfoundthatthehighersubstratetemperaturecouldincreasethedepositionrateofthe304SSparticles,eventheoxidefilmsexistedattheinterface.Therewasacriticaloxidefilmwithathicknessof3-4μmwhichcouldbedestroyedbytheimpactedparticles.Themicro-hardnessandmicrostructureofthe304SScoatingsunderdifferentsubstratepreheatingtemperatureswerealmostthesame.

简介：Phosphine(PH3)isahighlytoxicairpollutant,commonlyproducedinphosphorouschemicalindustry.Butithasreceivedlessresearchattentionduetoitshandlingdifficultly.COisthemaincontentofthephosphorouschemicalindustrytailgas,theconcentrationofwhichisalwaysmorethan80vol.%,anditcanbethefeedgastoproducevariousvaluableproductssuchasformate,oxalate,andmethanolandsoon.But,PH3isoneoftheimportantbarriers,whichisharmfultothefollowingchemicalprocess.Inordertomakeuseofthetailgas,PH3shouldberemovedfirstly,andCOshouldbecoveredinthewholepurifiedprocedureatthesametime.Inthiswork,themodifiedactivatedcarbon(MAC)wasusedastheadsorbenttoseparatePH3fromthemixturetailgas.SeriesofMACadsorbentswerepreparedfortheadsorptionofPH3,whichloadedCu-FeandCe(La),orseparately.ThePH3adsorptioncapacities,chemicalandphysicalpropertiesofMACwereallinvestigated.Theresultsshowedthatover99%PH3adsorptionefficiencywasachievedwhenusedMACadsorbents.TheremovalefficiencyandPH3adsorptioncapacityoftheCu-Fe-Ce/AC(20:1:0.4)werebothmuchhigherthanthosemodifiedactivatedcarbons.ThemaximumPH3adsorptioncapacitywas71mgofPH3/gofMAContheCu-Fe-Ce/AC,whichweremuchhigherthanliteraturedatausingCuOonlyforadsorbinghydridegases.