简介:Steelmakingisenergyandmaterialintensive.Thatiswhysteelisalwaysdemonizedandconfrontedwithincriminationsandrequirementsforreductionofitsenvironmentalimpact.Thosepuredemands-likeforemissiontradingareshort-sightedastheydonotbaseonanintegratedapproach.InsteadtheymerelyconsiderCO2emissionsduringtheproductionprocess.Aforward-looking,globalclimateandenvironmentalpolicyneedsasustainablelifecycleapproach.Thereforeitmustforexamplealsotakeintoaccountthecontributionofsteeltowardscuttingemissionsinitsapplication-intheenergy.automotiveandhouseholdsectors.Steelwillplayakeyroleinclimateprotection.One-thirdoftheremainingCO2reductiontargetplannedinGermanyby2020canonlybeachievedwiththehelpofinnovativesteelproductsandtheirapplications.ThisistheconclusionofanindependentstudybyTheBostonConsultingGroup(BCG)onbehalfofSteelInstituteVDEh,andGermanSteelFederation.ThestudycomparesCO2savingsfromimportantinnovativesteelapplications(suchasmoreefficientpowerstations,windturbines,orlightervehicles)withCO2emissionscausedbysteelproduction.Byadoptingthiscomprehensiveperspective,thestudyforthefirsttimeprovidesaCO2balanceforthematerialsteelbycomparingtheCO2reductionsmadepossiblethroughinnovativesteelapplicationswiththeCO2emissionsresultingfromsteelproduction.ThebalancewascalculatedonthebasisofeightselectedinnovativesteelapplicationsinGermanyfortheperiod2007to2020,wherebytheCO2emissionscausedbysteelproductionwereconsideredthroughouttheentirelifecycleoftheparticularsteeluse.Fortheselectedexamples,theuseofinnovativesteelsresultedinatotalsavingspotentialof74MtofCO2in2020.Thecalculationsarebasedonconservativeassumptions;forexamplewithoutcountingofpotentialsbyexportedsteelorbycomparisonwithcompetitivematerials.TheproductionofsteelinGermany,includingtheextractiono
简介:Highfunctionalitygiventosteelproductsresultsinanincreaseofenvironmentalloadsinthesteelmakingstage.However,atthestageoftheirutilization,thehigh-functionalsteelproductsprovetobemoreenvironmentallyfriendlythantheirconventionalcounterpartsinmanycases.Inviewofthiscontradiction,theevaluationonthecontributionofsteelproductstoenvironmentalimprovementrequiresamoreintegratedapproach-LifeCycleAssessment(LCA),whichincorporatestheeffectsovertheproducts'entirelifecycles.Thispaperdiscussestherelationshipbetweentheimprovementofsteelproducts'performanceandtheaccordingenvironmentalimpactfromtheentirelifecycleperspectives.Howtoevaluateandassessthecontributionofhigh-functionalsteelproductstoenvironmentalimprovementusingLCAmethodisexplainedindetail.TwocasestudiesofBaosteelaregiventosubstantiatetheeffectivenessofLCAasascientificandsystematicmethodforeco-materialevaluationoreco-design:①Forapowertransformer,byreplacingsiliconsteelB30G130withB30P110,thecarbondioxideemissionswerereducedby15.1%overthelifecycleofthetransformer.②TinplatesteelofBaosteelusedfortwo-piecesteelcansexperiencedsixreductionsinthicknessfrom0.28mmto0.225mm,whichresultsina14.5%emissionreductionoverthelifecycleoftwo-piecesteelcans.