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简介：China’sCrudeMagnesiumOutputDuringJanuary-FebruaryAccordingtothestatisticsofNonferrousMetalsAssociationofChina,China’soutputofcrudemagne-

简介：Forinitiativeapplicationofnon-oxidesinrefractories,itisessentialtostudythermodynamicpropertiesofnon-oxides.Thestabilityandstableorderofnon-oxidesunderoxidizedatmosphereareanalyzedfirstlyandthenanewprocess,"conversereactionsintering",isproposed.Theresultsofstudyonoxidationmechanismofsiliconandaluminumnitridesindicatethatthegaseoussuboxidescanbeproducedobservablywhentheoxygenpartialpressureislowerthan"conversionoxygenpartialpressure".Thesuboxidescanbedepositednearthesurfaceofcompositetobecomeacompactlayer.Thiscausesthematerialpossessingaperformanceof"self-impedientoxidation".MetalSiandAlarethebetteradditivesforincreasingthedensityandwidthofcompactlayerandincreasingtheabilityofanti-oxidationandanti-corrosion.ThestudyonSi3N4-Al2O3,Si3N4-MgO,Si3N4-SiCsystemsisalsoenumeratedasexamplesinthepaper.TheexperimentalresultsshowthattheconversereactionsinteringisabletomakehighperformancecompositesandmetalSiandAlnotonlycanpromotethesinteringbutalsoincreasethedensityandwidthofcompactlayer.

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简介：Thepaperdescribesthereactionbetweencar-bon-containingrefractories,magnesia-chromere-fractoriesandmatte,converterslag.Theresultsshowthatcarbon-containingrefractorieshavegoodresistancetomatteandconverterslaginnitrogenat-mosphere,Thepracticalresultsareunsuitableforconverter,highperformacemagnesiachromere-fractoriesarepromisingmaterials.Newlydevel-opedhighqualitydirectbondingmagnesiachrome,rebondedco-clinkermagnesiachrome,semi-rebondedmagnesiachrome,fusedcastmagnesiachromeusedinsmeltingfurancesareintroducedbriefly.

简介：TheternarycompoundbariumaluminosilicateBaAl2Si2O8,knownascelsian,anon-wettingadditivethatincreasesthecorrosionresistanceofrefractorymaterialsagainstmoltenaluminum,wasincorporatedintothematrixofahigh-aluminalowcementcastableafteritssynthesisusingbariteandalowcostsourceofaluminaandsilica.Thispaperpresentstheinfluenceofthisphaseonthewettingangleformedbetweenliquidaluminumalloyandsolidrefractorycastablesurface.

简介：Thenon-burnedcorundumspineluppernozzle,maldeofelectro-fusedcorunndumpowder,highpureelectro-fusedspinelwiththermosettingresinasbinder,addedwithcompoundant-oxdationadditives,hassuperiorHMOR,excellentcorrosionresistanceandsimpleproductionprocess,Theuppernozzlewasusedin90MTladleandtheservicelifewasimprovedby50%to60%