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1、熔渣對鎂碳耐火材料的腐蝕增加碳含量的影響THEINFLUENCEOFCARBONCONTENTONTHECORROSIONOFMGO-CREFRACTORYMATERIALCAUSEDBYACIDANDALKALINELADLESLAGThispaperdescribesaninvestigationoftheinfluenceofincreasingcarboncontentonthecorrosionofMgO-Crefractorymaterialbymoltenslag.Therefractorymaterialcontainedmassfractionof98%MgO,
2、approximately2%Fe2O3,andgradedquantitiesfrom3%to18%C.Thecorrosionwasinvestigatedinmeltsofreductionladleslagsatatemperatureof1600°Cinlaboratoryconditions.Asampleofrefractorymaterialwithdimensionsof10×10×100mmwassubmergedintothemoltenslagandexposedtothecorrosiveeffectoftheslagfor60min.Afterthee
3、xposeoftherefractorymaterialtheslagwascooleddownandsubmittedtoachemicalanalysis.AfteracomparisonoftheMgOcontentintheslagbeforeandafterthecorrosiontesttheamountofMgOcontentinthemeltwasdeterminedandthedegreeofcorrosionoftherefractorymaterialwasquantified.Theexperimentswererealisedusingfinalslag
4、sfromtheladlefurnace(LF),stronglyalkalineslagw(CaO)/w(SiO2)=4.43,andalsoacidicslagsw(CaO)/w(SiO2)=0.94withdifferentcontentsofCaF2.TheworkwascarriedoutwithintheframeoftheprojectsEUREKAE!3580andIMPULSFI-IM4/110.RESULTSThechemicalcompositionoftheslagsbeforetheexposureisgivenintheTable1.Table1sho
5、wsthattheacidicslagcontainsverylittleoftheCaF2(w=0.82%),andthatthealkalineslagcontains7.18%CaF2,addedtoincreaseitsfluidity.Table1:ChemicalcompositionandalkalinityoftheslagsusedforthecorrosiontestTabela1:Kemi~nasestavainbazi~nost`linder,kistabiliuporabljenizapreizkusekorozijeTheMgOcontentofthe
6、slagsafterexposuretotherefractorymaterialisshowninTables2and3.ThetablesalsocontainincrementsoftheMgOcontentandtheincrementsrelatedtotheinitialMgOcontentintheslags(MgO).Thesixtestedsamplesofrefractorymaterialdifferedonlyintermsofthecarboncontent,gradedfrom3%to18%.However,sample5%contained15%Ci
7、nadditiontoanantioxidant.Table2:ChangestotheMgOcontentinanacidicslagfordifferentcarboncontentsintherefractorymaterialTabela2:SpremembevsebnostiMgOvkisli`lindriprirazli~nivsebnostiogljikavognjevzdr`nemmaterialuTable3:ChangestotheMgOcontentsina
