简介：Requestedbyourreaders,acolumnofCompanyProfilehasopenedfromthisissueforthepurposeofprovidingthemwithmoreinformationonsomekeydomesticrefractoriesenterprises,researchinstitutes,jointventuresandforeignwhollyownedcompaniesinChinaterritory.ItisourgreatpleasuretostartthecolumnwithabriefintroductiontotheworldlargestrefractoriescompanyRHIontheoccasionoftheopenningceremonyofhersecondplantinChinaRHIRefractories(Dalian)Co.,Ltd.,whichwasheldonNovember30,2004.FollowingisthedetailontheeventcontributedbyDr.StefanPirker:
简介：MobarakehsteelCompanyproduces3milliontonsofsteelannuallywitheight180tonsEBTfurnaces.Differenttypesofmagnesia-carbonrefractorieshavebeenemployedatslaglineduringlast5years.InthepresentstudythewearandcorrosionofMgO-Crefractoriesofthesefurnaceshavebeenstudiedviapost-mortemanalysisofusedbricksandtheobservationofoperationaleffects.Laboratorycorrosiontestswerealsoarrangedtoinvestigatetheeffectofslagchemistryandthemechanismofchemicalcorrosion.Characterizationofdifferentmagnesia-carbonbricksclarifiedthatthecrystalsize,typeandchemistryofmagnesiaaswellasgraphitestructurehavethemaininfluenceoncorrosionresistance.TheCaO:SiO2ratioinslagalsoplaysavitalroleinthewearofslaglinerefractories.Theironoxidecontentofslagalsohasamajorroleingraphiteoxidation.Ofmetallurgicalparameters,theelectricpowerinputandthecontacttimehavegreatinfluenceonrefractorieslife.TheresultswillbediscussedwithemphasisonparticularoperationalfactorsinMobarakehsteelplant.
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