A roadmap to carbon-lean steel-中国Betway体育网页登陆

摘要 Thesteelindustryhascomealongwayinincreasingitsenergyefficiency.InEuropethecarbonintensityofsteelmakingoverthelast40yearswasdecreasedbyafactor2.Thepotentialforfurtherimprovementsisnowbecominglessobviousasblastfurnaceoperationsareapproachingthethermodynamicallowerlimitofhotmetalproduction.Totakeontheclimatechangechallengeandbeabletorespondtotheexpectationforstrongreductionofcarbonemissions,ArcelorMittal（AM）hasdevelopedatwostepapproach:（1）Inafirstinstancegiventhemodestremainingpotentialforincrementalimprovementsprecisebenchmarktoolsweredeveloped.Thisallowedidentifyingthetoprunnersanddeterminingtheremainingpotentialforimprovement.Plansweredevelopedtobridgethegapwiththisachievableperformance.Intotalaplanwasdevisedwithmorethan400identifiedactionsthroughoutthegroup.Thisactionplanwillallowachievingafurther8%increaseofCO2efficiencyby2020.（2）Secondly,alreadyin2002AMengagedinthedevelopmentofbreakthroughtechnologiestofurtherdrasticallyreducethecarbonintensityofsteelmaking.Afterscreeningalargenumberofcandidatesafewwereselectedforfurtherdevelopment.Afirstbreakthroughtechnologywhichisthemostadvancedstageofdevelopmentcanbeappliedtoexistingblastfurnaceandisreachingmaturityandademonstrationonindustrialscaleofthistechnologyisunderpreparation.Initselfthistechnologywilldecreasethedependencyoncarbonaswellasincreasetheproductivityoftheoriginalblastfurnaces.Realbiggainscanbemadeifthistechnologycanbecombinedwithundergroundcarbonstorage.IntheAMroadmaptheimpactofrawmaterials（DRI,scrap）wasexcluded.Inthelongerrunhowevertheattentionwillhavetoturntotheoverallfootprintofmaterialsandthelongtermconsequencesofthechoiceofmaterials.Increasingtherecoverywhilepreservingthequalityofusedsteelproductswillleveragegreatlytheeffortsdonein

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A roadmap to carbon-lean steel

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