镁橄榄石轻质隔热材料制备、结构和性能的分析

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1、第1I页武汉科技大学硕士学位论文AbstractWithresourcesgraduallydeficient，light-weightheatinsulatingrefractorybecomearesIearchhot：spotforitssmallbulkdensity，lowthermalconductivityandexcellentthermalinsulationeffects．ForsteriteisinwidespreaduseinsteelandironindustryandfoundryindustEI，asg

2、oodhightemperatureresistancerefractory．Butduetoitsapplicationofonlycoarsnessintheindustrymentionedabove，finepowderofforsteriteisoverstocked．Inordertosaveenergyandreduceconsumption，thispaperstudieshowtousefinepowderofforsteritementionedabvetopreparelight—weightheatinsul

3、atingrefractory．Thispapertakesfinepowderofforsterite，lightsinteringMgO，fusedmagnesiaandmicrosilicaasrawmaterialtostudytheinfluenceofprocessingparametersonthecharacteristicsofforsteritebasedlightweightbrickandtomakecorrelativeindustrialtest．Forsteritebasedlightweightbri

4、ckscouldbemadebyfoamingmethod．Whensodiumhexametaphosphatewasusedaswaterreducingagent，itsoptimaladditionwas0．2wt％．Sodiumcitl‘atewasusedtodispersetheagglomeratesinthefoammudevenlyaswellasitsbestadditionwas0．10wt％．WhenmoderateMgCl2aqwasadded，bulkdensityandgreenstrengthoft

5、hesamplesshowedasensiblerise．WhentheproportionoflightsinteringMgOandfusedmagnesiawas3：2(wt％)，theactivityoflightsinteringMgOcouldbecontrolledefficientlyandconsequentl)7strengthofthesamplescouldbeensured．Microsilicacouldimprovetheplasticityofthefoammudstrikinglyanditsopt

6、imaladditionshouldbe3wt％．Forsteritebasedlightweightbrickscouldbemadebyinclusionofcombustiblematerials．Thesamplessinteredat1500。Cfor3hshowedsmallreheatinglinearchangeandgoodthermalstability．Ricehuskpowderwasusedaspore—formingagenttoreducebulkdensityofproductsan(Iitsbest

7、additionshouldbe10wt％．Dextrinusedasbindercouldimprovetheplasticity0ftherawmealandformlotsofsmallporestoreducethebulkdensityoftheproductsanditsoptimaladditionwasabout3wt％．Usingforsteritebasedlightweightbricksmadeaspreparationabovetomakeindustrialtest，theresultshIowedtha

8、tthelightweightbrickscouldtaketheplaceofhighaluminarefractourbricksofheavyweightappliedtothermalinsulatinglayerofladl