简介：

简介：Cold-rolledhighstrengthsteelsheetsforautomobilescontainmoreMnandSibasedalloyelements,which,underthereducingatmosphereintheannealingfurnace,willgetenrichedonthestripsurface.Sincethefurnacerollersandthestripscontactfrequently,alloyelementsontherollersurfacewillformhardprotuberance.Wecallthisprotuberance"pick-up".Inaddition,withtheincreaseoftheamountofdustinthefurnaceatmosphere,theoccurrenceoffurnacerollerpick-upwillalsoincrease.Throughchemicalreactionandphysicalaccumulationanalysiscombinedwithpracticalexperience,thecausesofpick-upindifferentfurnacesectionswereanalyzed.Methodsofpreventingfurnacerollerpick-upinthehighstrengthsteelsheetprocessinglinewerediscussedandsolutionstoimprovingthestripsurfacequalityinthecontinousannealingfurnacewereprovided.

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.