简介：Byanalyzingthethermalandburdenstructureconditionsinsidethemelter-gasifierofCOREXprocess,theadvantageanddisadvantageofPCIintothemelter-gasifierareclarified.TheinfluenceofPCIontherunningconditioninsidethefurnaceisanalyzedbasedontheinformationfromproductionoperationandmathematicalandphysicalsimulations,andmeasurestotacklewiththeproblemsarisingfromPCIareproposed.Themainresultsareasfollows.①Duetotheunfavorableconditionsforcokingofcoalinthemelter-gasifier,cokingofchargedlumpycoaltogetsemicokewithgoodsizeandstrengthcanhardlybeexpected.Tomaintainthepermeabilityoftheburdencolumn,apackedbedsimilartoblastfurnaceisnecessary.Therefore,alittlemorecokewithPCIinplaceofmostofthelumpycoalmayimprovetherunningofthereactor.Thiscanalsomakethelumpycoalselectioneasier.②Overallheatbalanceanalysisofthemelter-gasifiershowsthatPCIhasnoeffectonthethermalconditionofthefurnaceasawhole.Localheatbalanceanalysis,however,showsthattheheathofthemelter-gasifierisinacriticalstateoflowheatsupply.PCIintothehearthwilldeterioratethethermalcondition.ToavoidthecoolingofthehearthzonebyPCI,moreoxygencanbeblowntothehearthzone,i.e.increasetheoxygensupplytothehearthanddecreaseaccordinglytheoxygensupplytothefreeboard.Moreoxygensupplytothehearthseemstobringouttheissueofanincreaseinfuelrateand/ortherebythesmeltingintensity.DetailedanalysisofthephysicalchemicalprocessesconcludedthatPCIwithmorecorrespondingoxygensupplywillnotleadtotheincreaseoffuelrate.③Comparingwithblastfurnace,theracewayvolumeofCOREXmelter-gasifierisaboutonly1/10～1/5ofthatofcorresponding-sizeblastfurnace.ThissmallracewayisnotfavorableforPCI.ToenlargetheracewaytogetmorefavorableconditionforPCI,lesstuyereswithmoreoxygensupplyofeachtuyereisproposed.④Comparingwithlumpycoalfeedingintot

简介：PresentlytheironandsteelmakersarecompelledtoincorporaterationalinitiativestoreduceitsprocessingCO2totalemissions.Inthemediumandlongterm,theinjectionofsmallparticlesofbiocharthroughthetuyereesinblastfurnaces,herecalledBio-PCI,offersattractivefeaturesfromtheenvironmentalandmetallurgicalpointofview,asitisarenewablecarbonneutralreductantandpresentslesserimpuritiesthancoke.However,itsutilizationinironplantsisbeenhinderedbythetraditionallargeavailabilityofrelativelyeconomicalcoalandcoke.Asthecostoftheprincipalprocessinginputsincreases（coal,cokeandironore）thegapbetweenfossilandrenewablereductantsdecreases.Inthissense,ourcontributionaimstocomplementthemetallurgicalinquiryoftechnicalfeasibilitywithastrategicidentificationoftheareaswithbestprospectstobenefitsfromtheincorporationofBio-PCI:wherecanitflourish?.Ouranalysisleadstoindicatethatemergingcountriesinspecific,China,BrazilandIndia,areinaprimepositiontoincorporatetheBio-PCIastheysimultaneouslycomplywithagrowingironindustrybasedonblastfurnaces,andpossessanimportantpotentialforenergygenerationfromforestryresidues.

简介：自1990年以来。日本各钢铁公司的大型高炉都实施了喷煤操作。在20世纪90年代，随着喷煤装置的增加和喷煤量的提高，焦比降到了350-400kg／t。自2000年以来，随着利用系数的提高。喷煤比反而星下降的趋势。

简介：达涅利康力斯得到一份订货合同，将向涟源铜铁公司(LISCO)提供一套PCI喷煤系统，其中包括喷煤系统设计、供货和技术服务。这套新的喷煤系统将为涟源正在建设的6号新高炉啧吹煤粉。PCI喷煤系统最大喷煤量可达250kg／t铁水，以确保高炉能够有效利用喷入炉内的煤粉。该系统将在2004年建成试车。设备供货仅限于关键设备，