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简介：Theeffectofpressdirectiononthethermalexpansion,slagresistance,etc.ofpericlase-spinel-carbonbrickhasbeenstudiedinthisarticle.Theresultsshowthatthetherma1expansionrateinthedirectionparalleltothepressaxisislargerthanthatinthedirectionperpendiculartothepressaxisandtheslagresistanceinthedirectionparalleltothepressaxisismuchbetterthanthatintheperpendiculardirection.Thedirectionaldistributionofgraphiteinthespecimenisobservedwiththemicroscope.

简介：Henanprovinceisveryrichinrefractorymineralsofmanyvarietiesincludingsilica,dolomite,graphite,pearlite,sepiolite,olivine,andsillimanitegroupminerals,besidestheabundantreservesoffireclayandbauxite,whichlayagoodfoundationforthedevelopmentoftherefractoriesindustryoftheprovince.Thepaperintroducesthereserves,distributionandcharacteroftherefractorymineralsinHenanprovince.

简介：Theeffectsofseveralcommercialdispersants,includingAN-2000,ammoniumpolyacrylate,sodiumtripolyphosphate,sodiumhexametaphosphate,andofsolidsloadingandofelectro-fusedmagnesiaonrheologicalpropertiesofaqueousalumina-spinelslurrieswerestudied.TheresultsrevealthatAN-2000isthemosteffectiveoneamongtheselecteddispersantsforalumina-spinelslurries.With0.5%weightofAN-2000,the57vol%solidsloadobtainedatshearrateof50s-1.

简介：ThecomplexcoatingontheMgO-CaOclinkerwaspreparedbydippingmethodandaddingthesecondmineraltorestraintheformationandexpansionofthecracks.Meanwhile,thericrostructureandthemorphologyofthecoatingandhydrationresistanceoftheMgO-CaOclinkerwerealsoinvestigated.TheresultshowsthatthecoatingconsistsmainlyofCa2P2O7,MgOandCaCO3,itsthicknessrangesfrom5μmto20μm,andthecoatingisdenseandeven,nomicro-cracksareobserved.Also,thecoatingadherescloselytothematrix.ThehydrationresistanceoftheMgO-CaOclinkeraftertreatmentisimprovedgreatly,andthecastablespreparedwiththetreatedMgO-CaOclinkerhavebetterphysicalpropertiesthanMgOcastable.

简介：Thepaperintroducesrefractoriesforcontinuouscasting,especially,refractoriesforcontinuouscastingforcleansteelinbaosteel.Developingdirectionofrefractoriesforcontinuouscastinghasbeenpointedouttosatisfythenewmetallurgicaloperatingpractice.

简介：Lowcement(LC)andultra-lowcement(ULC)bauxite-SiCcastablesareimportantandhighperformancemonolithicrefiactoriesandtheyhavebeenwidelyusediniron-makingandincineratorlinings.Inthiswork,rheo-logicalbehaviorofLCandULCbauxite-basedSiC-contain-ingcastableshasbeenstudied,includingtheeffectsofSiCcontentandcementcontentonrheologicalpropertiesofthecastables.TheresultsshowthatwithanincreaseofSiCandcementcontent,rheologicalpropertiesofthecastablesdeteriorate.Ontheotherhand,moderateamountsofSiC(4%～8%)andofcalciumaluminatecement(2%～4%)haveveryslightinfluenceonrheologicalproperties,(i.e.whenthecastablesareshearedtheirtorqueandyieldtorqueonlyslightlyincreasewiththeshearingspeed).Therheologicalcharacteristicsofthecastablesfol-lowBinghamfiuidandalwaysshowshearthinningbehav-ior.

简介：Theliningofblastfurnacemaybedamagedpartly,sothatgunningrepairisneeded.Thebondingstrengthofboundarysurfacebetweentherepairinglayerandremainedliningofblastfurnacehasbeenstudiedbythermalsimulation.Thefactorsinfluencingthebondingstrengtharetheingredientgunningrepairtemperature,remainedliningconditionandwatercontentofgunningrefractory.Thebondingstrengthdecreaseswiththeincreasesofremainedliningtemperature.

简介：Inthispaper,X-raydiffractogramanalysisandSEMobservationofAl4C3formedathightemperaturefromcarbon-containingrefractorieswithAlhavebeencarriedout.Aluminumaddedtocarbon-containingrefractoriesreactswithC(s)toformAl4C3(s)graduallyduringheatingfrom600℃to1200℃.ItisconsideredthattheinterlockedstructureofAl4C3platecrystalspromotestheoutstandingincreaseofhotmodulusofruptureofcarbon-containingrefractorieswithAl.TheHMORofcarbon-containingrefractoriesaddedwithAladditivefrom0to5wt％increasesby2.8timesbeingfrom6.5MPato18.2MPa.AfterathermochemicalcalculationforhydrationreactionprocessesofAl4C3andH2O(g),theequilibriumpartialpressurechartofH2O(g)inH2O-Al4C3-Al(OH)3systemvsvarioustemperatureshasbeenattained.TheH2O(g)partialpressureintheairneededfortheAl4C3hydrationreactionisnomorethan10～18atmatthetemperaturebelow120℃.Itisconsideredthattheburnedcarbon-containingrefractorieswithAlisextremelyeasytohydrateandthecrackingofburnedcarbon-containingrefractoriesisgeneratedbecausethatthehydrationexpansionis2.11timesduringtransformingfromAl4C3toAl(OH)3.ThefundamentalmeasureagainsthydrationoftherefractoriesistoinsulatetherefractoriesfromH2O(g)byvariousmeanssuchaspitchimpregnationorothersealingmaterials.

简介：Inordertomeettheneedsofhotrepairingtechnologyofcokeoven,thezeroexpansionsilicabrickwithsuperpropertieshasbeendeveloped,andtheproblemofpoorthermalstabilityofcommonsilicabrickhasbeenovercomned.Thisproductcanbedirectlyusedafterbeingrapidlyheatedafterconstruction.Atpresent,ithasbeenappliedincokeovensinItalyandBaosteel.