学科分类
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19 个结果
  • 简介:Akindofdryrefractorysealingmaterialhasbeendevelopedtorepairthefinecracksincokeovenchamber.Withsilicasandasthemainrawmaterial,thesealingmaterialisblownintocokeovenchamberbycompressedairwhilebeingapplied,andbondedtobricksurfaceorfilledinfinecracksofchamberunderrightpressure.Thephysicalpropertiesofthematerialaresimilartothoseofsilicabricksduringitsapplication.Soitcanbeadaptedtoconditionsofcokeovenandhasgoodservicelife.Thestudyandapplicationresultsofthesealingmaterialaredescribedinthispaper.

  • 标签: 耐火材料 密封材料 烤炉 硅石
  • 简介:ThepaperdescribestheeffectofadditivesAl,Si,SiCandB4ContheexpansionofMgO-ZrO2-Cmaterialafterbeingcoked.TheresultsindicatethatAlandSicannotincreaseitshotandcoldstrength.AlandSiwereoxidizedtoformAl2O3andSiO2respectively,andthenreactedwithCaZrO3orstabilizerinc-ZrO2toformcalciumaluminate,spinel(MA),dicalciumsilicate(C2S)andforsterite(M2S).Meanwhile,α-C2Swastransformedtoγ-C2Sandc-ZrO2tom-ZrO2whentemperaturechanged.AlltheabovereactionsresultedinthedecreaseoftheamountofAl4C3andSiCandtheincreaseinbulkvolume,whichcausedthestructureofMgO-ZrO2-Cmaterialdestroyed.Hence,contrarytotheMgO-Cmaterial,whenaddingAl.andSi,theMgO-ZrO2-Cmaterialwouldbestructurallydeterioratedafterheat-treatmentanditsstrengthandcorrosionresistancedecreased.

  • 标签: 性质 氧化镁 MGO 二氧化锆 ZRO2
  • 简介:OnthebaseofMgO-CaOcoatingmaterialTD-CA12fortundish,anewTD-CA32withhighCaOcontentwasdeveloped,ItsCaOcontentis30%-36%andMgOcontentis45%-55%,TheapplicationresultinBaosteelshowsthatTD-CA32notonlyhasthesamepropertiesasTD-CA12butalaohastheimprovedpropertiesofdisintegrationandsteelpurifing.

  • 标签: 氧化钙 氧化镁 耐火材料槽 涂层材料 镀覆材料
  • 简介:TherearemanyprocessestoproduceCr2O3fromchrome-ores,DifferentparticlesizerangesofCr2O3powder,finepinmentgradegreenCr2O3andcoarsemetallurgygradeblackCr2O3,aremadebydifferentprocessesinChina,GreenCr2O3assuperfineandadditionandmetallurgygradeblackCr2O3usedtosynthesizeCr2O3graincanbeappliedtorefractories.ItisverydifficultforhighpurityCr2O3tosintertodensificationandTiO2additioniscontributedtodensificationofCr2O3sinteredathightemperature,Cr2O3grainswithrelativedensityof91%-95%aregainedbysinteringCr2O3withTiO2additionandelectrofusingCr2O3rawmaterials.

  • 标签: 三氧化二铬 CR2O3 原料 耐火材料
  • 简介:AkindofZrO2ceramicmaterialforporousmediaburnerwaspreparedbypolymericspongeprocesswithstartingmaterialsofzircon,zirconiapowder,microsilica,andballclay,andbinderofsilicasolthroughreaction-sintering.Theeffectsofmicrosilicaadditiononcoldcrushingstrengthandzirconia/zirconaddingratioonthermalshockresistancewerestudied.Theresultsshowthattheporousmediamaterialhasproperporosity,highstrength,andexcellentthermalshockresistancewhenzirconiaadditionis85%andzirconadditionis5%.Theperformanceindexesare:porosity82%,coldcrushingstrength3.1MPa,thermalshockresistancemorethan10cycles,andgoodthermalshockresistanceto1500℃flame.

  • 标签: 氧化锆陶瓷材料 多孔介质 性能指标 燃烧器 抗热震性 起始原料
  • 简介:Functionalrefractories,includingsubmergedentrynozzle(SEN),ladleshroudandmonolithicstopper,arethekeyrefractoriesforcontinuouscasting.Drivenbythedemandofhigh-speedcontinuouscasting,traditionalfunctionalrefractoriesfailtomeettheneedsoflongspanlife,andhighperformancefunctionalrefractoriesforcontinuouscastingareincreasinglyrequired.Throughstructureandmaterialdesign,theperformanceoffunctionalrefractoriesissignificantlyimproved.Inthispaper,someresearchadvancesonfunctionalrefractoriesforcontinuouscastingwerementioned.Throughnumericalmodelingandhotsimulation,theservicelifeofnon-preheatingladleshroudwasincreasedfrom8htomorethan12h.Throughthewatermodeling,theflowpatternsinthemoldweresignificantlyimprovedandthroughhotsimulationandmaterialdesign,theservicelifeandreliabilityofSENwerealsosignificantlyimproved.

  • 标签: 功能耐火材料 材料设计 高速连铸 性能结构 塞内加尔 连续铸造
  • 简介:Micro-poredCA6-MAlightweightmaterialwithCA6:MAmassratioof7:3waspreparedusingAl(OH)3.MgCO3andCaCO3asstartingmaterials,andanthracite.sweetpotatostarchandanthracite+sweetpotatostarchasporeformingagent(PFA)withanadditionof10mass%.20mass%and30mass%.respectively.Thestartingmaterialsweredrymixed.wetco-milledinaballmillfor1h.slipcastintocylindricalspecimenswithadiameterof60mm.andthencalcinedat1450℃for3h.WiththeincreaseofPFAaddition.apparentporosityincreases,andbulkdensitydecreases.TheinfluenceofdifferentPFAsonpropertiesofthemicro-poredLWCA6-MAaggregatewasinvestigated.TheachievedCA6-MA.byadding30%sweetpotatostarch.hasaporosityof76.8%.bulkdensityof0.78g·cm-3andmedianporesizeof1.90μm.

  • 标签: 材料性能 微细孔 成孔剂 AL(OH)3 红薯淀粉 起始原料
  • 简介:ThispapertestifiesthataluminiumandsiliconaswellastheircarbidexandnitridescanreactwithCOincarbon-containingzonetoformAl2O3andSiOgasthroughexperimentandthermodyanmicanalysis,ThegasesdiffusetooxidizedzoneandreactwithoxidizerssuchasCO2,Asaresult,Al2O3andSiO2aredepositedfromthegases,wihichblockthepores,thusreducetheamountofgasdiffusionandincreaseoxidationresistnaceofcarbon-containingmaterials.

  • 标签: 氧化铝 石墨 添加剂 被氧化物质 碳化硅 阻塞孔
  • 简介:MgO-Al2O3-Cr2O3rammingmixesmadeofdifferentrawmaterialshavedifferentmineralstructureanddifferentphysicalpropertiesthoughwiththeidenticalparticlesizedistribution,thesameamountofbinderandchemicalcomposition.Theresidualcarboncontentofthefusedmagnesia-chromematerialmadeinreducingatmosphereisveryhigh,ifthismaterialsisusedintheMgO-Al2O3-Cr2O3rammingmix,itwouldcausespallingofthefurnaceliningduringdrying-out.

  • 标签: 原材料 氧化镁 三氧化二铬 搪炉料 搪包料 三氧化二铝
  • 简介:所谓的“鱼油药品”指的是高纯度n-3多不饱和脂肪酸(n-3PUFA)——多烯酸乙酯药品。n-3多不饱和脂肪酸是鱼油的有效成分,但不是鱼油的代名词。鱼油中含有多种脂肪酸,其中只有高纯度n-3多不饱和脂肪酸被证明具有心血管保护和降脂作用,是一种冠心病二级预防的处方药。

  • 标签: N-3多不饱和脂肪酸 鱼油 药品 保健品 有效成分 降脂作用
  • 简介:<正>关于屈臣氏集团WatsonsGroup屈臣氏集团是和记黄埔有限公司(和黄)下属之零售及制造集团,在亚洲区经营多家享负盛名的零售连锁店,包括屈臣氏个人护理商店、百佳超级市场,以及丰泽电器产品店等。目前,屈臣氏集团在欧洲经营六个保健及美容的零售品牌

  • 标签: 屈臣氏 零售连锁 个人护理 美容产品 零售品牌 护理产品
  • 简介:美国波士顿-2012年8月24日-全球领先的特种聚合物材料、服务和解决方案提供商普立万公司(纽交所上市代码:POL)最近与来自美国加州艺术中心设计学院(ACCD)工业设计系的优秀学生开展合作,并在近日举办的美国工业设计协会2012年会上介绍了其中三个优秀的全新家庭保健产品的设计成果。

  • 标签: 聚合物材料 保健产品 学生 家庭 工业设计系 创新
  • 简介:瑞士特种化学品公司科莱恩公司推出了Mevopur色母粒新产品——Mevopur-LQ。作为Mevopur色母粒家族的新成员,这种颜色和添加剂浓缩液,主要在制药包装与医疗保健中应用。

  • 标签: 医疗保健 色母粒 产品 应用 纺织 硅胶