摘要
TheEuropeanstainlesssteelproducersgenerate20-30kgdustpertonofproducedstainlesssteel.ThedustformedduringvariousstagesoftheproductionprocesscontainsvaluablemetalssuchasCr,NiandMo.Ingeneralthisdustisconsideredasahazardouswaste.Ifnottakencareofthedustwillbeanenvironmentalriskcausingpotentialproblemssuchasleachingofheavymetalsintogroundwaterandpollutionoflandandair.Byapplyingtechniquesforrecyclingthedusttheproblemisminimizedandvaluablemetalsarerecoveredandre-usedasrawmaterialinthesteelmakingprocess,leadingtoasignificantreductionoftheconsumptionofnaturalresourcestodeceleratetheclimatechangeandensureasustainabledevelopment.OneofthebusinesssegmentsofBefesaZincS.L.U.,asubsidiarycompanyofAbengoa,istherecyclingofdustsandotherresiduescontainingnickel,chromiumandmolybdenumfromthestainlesssteelindustry.Thetechnologiesappliedaresubmergedarcreductionsmelting（BefesaValeraS.A.S.,Gravelines,France）andplasmareductionsmelting（BefesaScanDustAB,Landskrona,Sweden）.Stainlesssteelplantdusts,millscaleandotherresiduesaredeliveredinclosedcontainersandbigbagsbyship,railortruckandstored.Afterapreparationoftheresiduesandchargingintothepyrometallurgicalfurnace,themetalcompoundscontainedinthechargearereducedtometalsinthepresenceofthecarbonadded.AtBefesaScanDust,theregularlytappedliquidmetaliscastintheformofgranulesviatheGranshot?granulationprocess.Thegranulatedproducthasmanyadvantagessuchasexcellentpreheatingpropertiesandfastmeltingwhenaddedtoametallurgicalprocess.Thegranulessizeandshapealsomakesitverysuitabletohandlewithmostrawmaterialhandlingsystems.Bygranulatingtheso-calledalloyedpigiron（API）ahighmetallicyieldisachievedensuringmaximumrecoveryofmetalandlessnewdustgenerationcomparedtoacrushedmaterial.Thegranulesareredeliveredtothestainlesss
出版日期
2010年07月05日（中国期刊网平台首次上网日期，不代表论文的发表时间）
