简介：Drillpipeproductsarethemostcriticalservicerequirement,thehighestperformancerequirementandthehighestqualityreliabilityOCTGproducts.Throughthecontinuousresearchonsteelmaking,upset,hearttreatment,straighteningandfrictionwelding,Baosteelimprovesthekeytechnicalparameterswhichaffectthequalityofdrillpipe,suchasmaterialpurity,Miuofinternalupsettransitionarea,toughnessandstraightness.Baosteeldrillpipeproductshavemetthedemandingrequirementofdrillingoperations.ByBRPdephosphorizationandLFdesulfurization,theP,ScontentofBaosteeldrillpipeisverylow.TheScontentofS-135drillpipecanbecontrolledinlessthan10ppm.Baosteeldesignsanewclosed-loopcontrolsystemofupsetendinductionheatingsystem.Thesystemusetemperaturemeasurementinsidetheovenandclosed-loopcontrol.Thetemperatureaccuracyofthesystemcanbeguaranteedwithinthe±15℃togetastableupsetquality.TheupsettingprocessofthedrillpipeisoptimizedbyusingpatentedtechnologyandmadetheMiufrom100mmto140mm.Thismakeasubstantialincreaseinfatiguelifeofthedrillpipe.Toimprovetheimpacttoughnessofthedrillpipebody,thedrillpipebodymaterialischangedfromCr-Ni-MosystemtoCr-Mo-Vsystemandtheheattreatmentischangedfromoilquenchingtowaterquenching.Toimprovetheimpacttoughnessofthetooljoint,thetooljointfurnaceisupgradedtoimproveheatingcapacity.Toimprovetheimpacttoughnessoftheweldzone,anewfuzzycontrolsystemofweldzoneheattreatmentisdeveloped.Thetemperatureaccuracyofthesystemcanbeguaranteedwithinthe±5℃togetastableheattreatmentquality.Anewdrillpipestraightnessautomaticdetectiondevicesandself-learningmethodofstraighteningaredevelopedtoachieveautomatedstraightening.Aweldingprocesswithhighspeed,single-stagepressureandhighforgingforceisappliedtoinertiafrictionwelding.Aweldingprocesswithlowspeed,three-stagepressureandlowforgingforceisappli

简介：ShorttapholelengthisoneofthemosttroublesomeproblemsofBaosteel’sCorex-3000afteritsstartup.Owingtothemeltergasifierprocess,thecharbedfloatedupanddownasthelevelofhotmetalandslaginhearthchanging.Thesecausealotofproblemssuchastheheavyerosionoftapholeareasandhardcasthousework.ThehighsecondtappingflowisanoticeablecharacteristicofCorexprocess.Thereasonsofshorttapholeisanalysed,andcountermeasuresareputintopractice,someimprovementsarecarriedoutinmodule2Corex-3000.

简介：Thisstudyanalyzesthefactorsofinfluenceon0~#continuouscasterinNo.1SteelmakingPlantofXinjiangBayiIron&SteelCorporation(hereinafterreferredtoasBasteel).Diameteroftundishuppernozzleissmall,andthemoltensteelleakageaccidentshavebeengreatlymanifoldedinthehighcastingspeed.Inordertoincreaseyieldof0~#continuousecasterinNo.1SteelmakingPlantofXinjiangBayiIron&SteelCorporation,andaseriesofameliorationmeasurewasputforward.Throughenlargingdiameteroftundishuppernozzle(fromφ21mmtoφ21.5mm),afterthewaterdistributionofthesecondarycoolingwasoptimized.Basedonstabilizingthequality,improvingtheaveragecastingspeedandworkrateofthecaster,thecapacityofthebilletcontinuouscasterwasimproved.Abetterresultswasgained;theaveragecastingspeedhadbeenincreasedfrom3.04m/minto3.21m/min.Productionofthecasterhadbeenimprovedfrom1005179.926tin2008to1040853.075tin2009.Qualityoftheconcastingbilletsandproductionhadalsobeenstabilized.

简介：Fromtheviewofthedomesticandinternationalenergy,environmentandoperationsituation,thepaperanalysestheconfrontedproblemsofironandsteelindustry,answerswhybaosteelhasbeenfulfillingenvironmentoperationstrategy,andproceedtotheintroductionofitsenvironmentmanagementpracticeandfutureoutlooks.Theenvironmentmanagementisessentiallyagreenvaluecreation,whichemergestheenvironmentalprotectionintothewholebusinessenterpriseoperatesprocessinordertocreateitsvalue.Theenvironmentmanagementisakindofmanagementcreation,isakindofactiveenvironmentmanagement,whichpromotesthemainsenseofenergyconservationandemissionmitigation.

简介：ShougangGrouphascarriedoutastrategicstructureadjustmentinordertorealizethepromiseofChinesepeopletotheOlympicGames.Automotivesheetsarechosenasatypeofstrategicproductandanenginetoupgradeenterprisemanagement,technologyandoperationtoreachthetopinternationallevelduringthetransitionfromlongproductstosteelsheetsinShougangGroup.Since2006,ShougangGrouphasmadeanelaboratepreparationonsteelsheetculture,productionlineconstruction,technologyimport,pilotplantandtalentreserve.Itlaysthefoundationforthedevelopmentofautomotivesheets.Thedevelopinghistoryofcoldrolledautomotivesheetsisreviewedandtheresearchanddevelopmentofcoldrolledautomotivesheets,tacklingkeyproblemofdefectonsurfaceandthelatestprogressofautomotivesheetsconstructionaredescribedinthispaper.Themaincontentsweregivenasfollows:①TheproductsofautomotivesheetsrealizezerobreakthroughinShougangGroup.Monthlyoutputwas300toninJanuary,2009anditincreasedto48000toninJune,2010.TheratioofIFsteelsheetsincreasesto70%from40%.Theproportionofoutsidepanelinautomotivesheetsoccupysmorethan15%.②Ahighemulationalpilotplantisusedasaproductdevelopingplatformtodevelopsuccessfullyautomotivesheetswith1000MPaandbelow.ItguaranteesthattheindustrialdevelopmentofDPandTRIPsheetsgetssuccessatatime.Itcoverscontinuousannealingsheetswithtensilestrength≤780MPaandgalvanizingsheetswithtensilestrength≤590MPa.③Individualdesignisusedtomeetspecialrequirementofcustomer.Shougangowns23innerbrandsofLCAKandIFsteels.Itinsuresthatthegradesofyieldstrengthcoverwholerangefrom120to270MPa.Itkeepsthestabilizationofsteelperformancebymeansofchemicalcompositioncontrolandhighaccuracyrollingtechnology.Forexample,thestrengthofsoftsteelfluctuateswithin±15MPa.④ThesteelsheetswithsurfacegradeO5areproducedsteadilybysolvingformingstr

简介：Inthispaper,abriefintroductiononclad-rollingheavysteelplatesof90mmand140mmthickispresented.Thesteelplateswerehotrolledby265mmslabsthatarecladdedbydouble135mmcontinuouscastingslabsofQ235steel.Afterhotrolling,interfaceofthecladdingslabscompletelydisappeared,revealinguniformgrainssimilartotherestofthematerials.Ultrasonictestswerecarriedoutonbothsteelplates,demonstratingexcellentresults.Throughthicknesstensiletestswerealsoimplementedonbothsteelplates,resultinginperfectmechanicalpropertiescomplyingwithspecificstandards.Theresultprovesthataminimumreductionrateof1.89isavailableinproducing140mmthicksteelplatewithexcellentthroughthicknessproperties.

简介：CausesforcentralshrinkpipeofGCr15bloomswereanalyzed.Countermeasurestotacklewithsuchdefectwerepracticed,includingsuitablesecondarycooling,softreductionandcastingspeed,aswellasstrictsuperheatcontrol.Theresultsshowthatthequalityofbloomcastingsissignificantlyimproved.

简介：Thispaperintroducesworkingprincipleandtechnicalfeaturesofvacuumfilterinemulsionsystemfortandemcoldstripmill.Basedonspecificcases,thispaperanalysesandassessestheeffectbeforeandafterusingtheemulsionsystemwiththeusageofthevacuumfilterforstripmill.Comparewiththeeffectwhenusingthefirstgenerationvacuumfilter,theemulsionqualityisimprovedsignificantlybyusingthesecondgenerationvacuumfilter,whichatthesametimeensuressteadyoperationoftherollingmillandsurfacequalityofthemillproducts.Asaresult,investmentandrunningcostsarelowered,emissionsofthewasteemulsionarereduced,wastewatertreatmentcostsarereducedandsoastheenvironmentalpollution.Itcanbeseenthesecondgenerationvacuumfilterhasobviouseconomicandenvironmentalbenefits.Therefor,itsuggeststhatthefiltershouldbeusedwidelyinthefieldofautomotive,environmentalprotectionrollingsteelandnonferrousmetals.

简介：Thisstudycomparestheregenerativeradiant-tubeheaterwiththetraditionalradiant-tubeheater,showingtheregenerativeradiant-tubeheatershavemanyadvantagesinfuelconsumption.Basedontheexperienceofchangingaheatingsystemwithtraditionalradiant-tubeburnerstoaheatingsystemwithregenerativecombustion,propositionsaregivenforthecombustioncontrolsystem,pilotburner,flamedetectionandfortroublepreventioninrebuildingthecontinuousannealingproductionline(CAPL)andthecontinuousgalvanizingline(CGL).

简介：Thispaperintroducestheprocessflow,technicalparametersandrelevantfeaturesofBaosteel'sNo.8airseparationunit(ASU)withacapacityof60000m3/h.Itsummarizesthecommissioningwork,whichincludestheadjustmentoftheaircompressor,thesystem'snakedcooling,theprecoolingsystemandtheoperationadjustment.Italsoprovidesdetailedanalysesonsomefailureswhichoccurredinthecommissioning.Throughthemodificationofthedesignandtheinterlocks,thetrippingprobabilityoftheaircompressorwasgreatlyreduced.Throughtheheatingofthesystemandthecontrolofthewatercooler'snitrogenflow,theoverproofcontentofcarbondioxideandfluctuationofoxygenflowwereavoided.Nitrogen-blockintheargonsystemwaseliminatedbytheprecisecontroloftheargonrectificationflowandargoncontent.Allthesesolutionshavebeenprovedtobeeffectivebypractice.

简介：ThisstudymainlyintroducesthetechnicalpropertiesofakindofleancoalminedfromLu'an,aprefectureofShanxiProvinceanditsapplicationtocoalinjectioninlarge-scaleblastfurnaces(BFs)inBaosteel.Chinaisrichinleancoalresources.Thetechnicalpropertiesofleancoal,includingashcontent,sulfurcontentandcaloricity,etc.,aresimilartothoseofanthracitecoalusedinBaosteel,exceptthefactthatthevolatileofleancoalishigher.Besides,theexplosivepropertyandthecokingpropertyofleancoalaresuitablefortheBFcoalinjection.Inthisstudy,leancoalwastestedinthepulverizedcoalinjection(PCI)ofaBF.Inthetest,theblendingproportionofleancoalinthecoalblendwasincreasedgradually,andtheconsequentialproductionindexesweretraced.AlltheoperationalindexesshowthattheresultsoftheBFcoalinjectionaregood,demonstratingthatleancoalcanbesubstitutedforanthracitecoalinthePCIinBFs.Withanabundantamountandspecificutilization,leancoalisfoundtobeofahigheconomicvalue.

简介：TheIronmakingPlantofTangshanIron&SteelCo.Ltd.takescleanproductionasitsorientation.Itdecreasessilicontosmeltthroughincreasingtheenteringfurnacesinterratio,stabilizingcokequalitybytacklingkeyproblems,increasingcoalinjectionratio,aswellaskeepingtheblastfurnacesmoothrunningandsoon.Theenergyconsumptionofsinterworkingprocedurehasbeengreatlyreducedthroughoptimizingtheoreblenderstructure,enhancingthequalityoffuelandflux,increasingthequicklimeamount,reclaimingtheremainingheatoftheannuluscoolingsystemanddeepeningthemateriallayertosinter.Wehaveachievedtherepetitioneconomyandthesecondlyresourcehasbeenusedsyntheticallywithadvancedproducingtechnics.Theenvironmentaroundtheplanthasbeengreatlyimprovedbypreventing,monitoringandfatheringthemovingpollutionroot,atthesametime,theeconomyandenvironmentdevelopmentinphasehasbeengreatlyaccelerated.

简介：ThisstudysystematicallyreviewsandsummarizesrelocationandrevampingprojectofmediumandheavyplaterollingmillinBayiSteel.AfterdetailedanalysiswasmadeonthemaindeficiencyandproblemsoftheoriginalproductionlineofPudongSteel,systematicalintegrationandimprovementfortheprocessandequipmentwerecarriedoutaccordingly.Throughinnovativepracticeofintegration,BaosteelEngineeringhasgreatlyimprovedthetechnicalprocessandequipmentmake-up,aswellasthegradesandqualityoftheproducts.Theoriginalman-operatinglineisredesignedintoanautomaticsystemcontrolledbyLevel2computer,reachingtheadvancedtechnicallevelofhome-mademediumandheavyplateproductionlineinrecentyears.Theprojectisconstructedintwophases;TheoriginalproductmixofPudongSteelismaintainedasmuchaspossibleinPhaseI.After3500mmsinglestandfinishingmillisputintooperation,capacityofhot-rollingmediumandheavyplatereaches650000t/a,withthemaximumthicknessat40mm.Equipmentorfacilitiesarereservedforproductionofpipelinesteelandothergrades.Pipelinesteel,vesselplate,windpowerplateandotherTMCPandheattreatmentproductsareprojectedinPhaseⅡ.After4200mmroughingmillanditsmatchedfacilitiesareputintooperation,capacityofhot-rollingmediumandheavyplatewillreach120000t/a,withthemaximumthicknessat80mm.Throughtheoptimizationofprocessequipmentanditsfunction,therelocatedmediumandheavyplatemillproductionlinehasreachedadvancedlevelamongsimilardomesticmills.Theprominentachievementsoftheprojectaretherevampingofthicknesscontrolsystemofthefinishingmillandthenewlyinstalledshapecontrolsystem.Automationcontrolofthewholelineisrealized.