简介：Sillimanite,kyaniteandandalusiteareadvantageousnaturalrefractoryrawmaterialsforaluminosilicaterefactoriestoattainimprovedkeyproperties.Thispaperaredividedintopartstointroducetheirresourceandtechnicalcharacteristicinthefirstpart,andtheirapplicationsinrefractoriesinthesecondaprttobesucceeded.Inthispart,basedonauthors'knowledgeandsources,informationontheirreserve,distribution,compositionandcharacteristicisprovided,tobringittolightthatChinaisrichinthereserveofthem,inparticularandalusite.Thesillimanitegroupmineralsarecharacterizedbytheirphasetransformationtoformprimarymulliteandsecondarymullitewhenaddedinhighaluminasystem,accompaniedbyvolumeexpansion,whichcanbetakenusetoimprovecreepresistancesandthermalshockresistanceoftherelatedrefractories.

简介：Theeffectofparticlesizedistributionofaluminahasbeeninvestigatedforsilica-freetabularaluminalowcementcastables(LCC).Threedifferentcombinationsofaluminahavebeenincludedinthematrixformulationofthecastables.Allthethreecombinationsarecomposedofabimodalreactivealuminaandafinegroundmonomodalreactivealumina.ThefirstA1andsecondA2combinationsarerespectivelycomposedofbimodalandmonomodalaluminasfromAlteo,withadifferentfine/coarseparticlesratioforthebimodalalumina.ThetwoAlteocombinationshavebeencomparedwithathirdcombinationCcomposedofabimodalcommerciallyavailablegradeandamonomodalcommerciallyavailablegrade.OptimizationofparticlesizepackinghasbeenperformedforthethreedifferentformulationsusingtheDingerandFunkmodel.Withthisoptimization,thetwoformulationsbasedonAlteomaterial(PFR,PBRandPFR40)achievethesamelevelofperformanceinapplicativetests(flowability,coldphysicalproperties,mechanicalresistance,crystallinephases,thermalshocksandcorrosion)asreferencesolutionsonthemarket.

简介：ThisworkstudiedthecharacteristicsofSiO2distributionandstructureofsilicatephasesinMgO-ZrO2compositessynthesizedbyrawmaterialsoflightfiredmagnesitendzircon,Theresultsindicatethat30wt%-40wt%SiO2contentinthesystemisexistedintheformofcrystallineofforsterite(M2S),theremainderingofSiOcontent(60wt%0-70wt%)isexistedintheglassphase,Thechemicalcompositionofglassphaseiswellagreedwiththechemicalcompositionofmonticellite(CMS).