简介:Inrecentyears,Chinahasfullydevelopedinoutput,quality,andtechnicaladvancementofrefractories,andbecomethebiggestcountryinrefractoriesproductionandconsumptionintheworld.Meanwhile,educationandtraininginChina'srefractoriesindustryhavedevelopedrapidly.Thispaperintroducesthepresentsituationsofundergraduateeducation,postgraduateeducation,academiceducation,andvocationalandothertrainingofChina'srefractoriesindustry,includingthestudentrecruitingsituation,subjectarrangement,teachersforce,andR&Dequipmentlevel,andalsoputsforwardsomesuggestionsforChina'srefractorieseducationandtraining.
简介:Chinahasbeenthebiggestcountryinproductionandexportingofrefractories.Thearticledescribestheproblemsintheexportandimportandsuggestionsondevelopmentofrefractories.Inthefuture,Chinawillexpanditscooperationwithworldrefractoriescommunityinscience,technology,economyandtradetoplayamoreimportantroleintheinternationalanddomesticmarkets.
简介:ThearticlestatesChinaisagreatnationinproducingandexportingrefractoriesandrefractoryrawmaterials,which,hasearnedmuchforeignexchangeforourcountry,onlyafewadvancedrefactorymaterial,zirconandchromeoreareneededtobeimported.Thear-ticlepointsouttheproblemsintheexportandimport,andraisessuggestionsondevelopment.AftertheentryofWTO,Chinawillexpanditsco-operationswithothercountriesinscience,technology,economyandtradetoplayamoreimportantroleintheworldmarket.
简介:TheannualoutputofChina'srefractoriesin1949was74thousandtons,andwas29.11milliontonsin2007,whichwas65%oftheworldtotalrefractoriesoutput.TheexportofChina'srefractoryproductsandrawmaterialsin2008was6.18milliontons,whichwereexportedtohundredsofcountriesandregionsintheworld.Chinaisabigcountryinthefieldofrefractoriesproductionandrefractoriesexport,whichhasdevotedalottorelativehightemperatureindustry.
简介:ThetendsofrefractoriesdevelopmentinChinainthenewcenturyhavebeendiscussed,ThemainR&Dthemesforthefirstdecadearesuggestedtobasfollow:(1)Highqualitysyntheticrwamaterialsbasedonourrichresourcesofbauxiteandmagnesite;(2)Highperformancefunctionalrefractoriesbasedonsyntheticrawmaterials;(3)Oxideandnonoxidecompsitematerialsprinci-pallyforapplicationsatcriticalareasofhightemperaturenewtechnologies.
简介:Ni-dopedphenolresinwaspreparedwith1∶100massratioofNi(NO_3)_2·6H_2Otothermosettingphenolresintooptimizethestructureandpropertiesofpyrolyticcarbonderivedfromphenolresinandincreaseitscarbonyield.Thespecimenswerecuredat200℃andcarbonizedunderdifferentatmospheres(carbon-embeddedatmosphereandAratmosphere)andatdifferenttemperatures(600,800,1000and1200℃)for3h,respectively.Thecarbonyieldwasmeasured.ThermaldecompositioncharacteristicsofNi-dopedphenolresin,andtheoxidationresistance,phasecompositionandmicrostructureofpyrolyticcarbonwerecharacterizedbydifferentialscanningcalorimetry,X-raydiffraction,energydispersivespectroscopy,scanningelectronmicroscopyandtransmissionelectronmicroscopy.TheresultsshowthatthecarbonyieldofNi-dopedphenolresincarbonizedat800or1000℃isincreasedsignificantly,comparedwiththatwithoutanydopants.ThegraphitizationdegreeofpyrolyticcarbonstructurederivedfromNi-dopedphenolresinincreaseswiththeincreaseofcarbonizationtemperature.Themassivemulti-wallcarbonnanotubesof50-100nmindiameterandofmicrometrescaleinlengtharegeneratedat1000℃.Comparedwiththecarbonembeddedatmosphere,carbonnanotubescanbemoreeasilygeneratedinAratmosphere,resultinginhighercarbonyieldanddegreeofcrystallinityofthepyrolyticcarbonderivedfromNi-dopedphenolresin.TheoxidationresistanceofthepyrolyticcarbonderivedfromNi-dopedphenolresinat1200℃isimprovedsignificantlyanditshighestoxidationtemperatureisincreasedbyabout84℃,comparedwiththatfromNifreephenolresin.
简介:Thepotentialapplicationsofsomehightenologiesinrefractories,suchas,nanotechnology,in-situsynthesis,self-propagatinghigh-temperaturesynthesis,functionalgradientmaterials,computerassisteddesignandsomenewadvancedrefactoriesinSi-Al-O-Nsystemarebrieflydescribed.Thecharacteristicsandpreparationprocessesofthesenewrefractoriesareintroduced,andtheremainingproblemsawaitingeffectivesolutionsarepointedout.Somesuggesionsonfuturediectionofresearchanddevelopmentarefitlymade.
简介:IntheprocessofVHD,argonisblownintothemoltensteelthrouhttheporousplugswhicharemountedintheladlebottom.AnewtypeofporouscorundumplughasbeendevelopedfortheVHDsecondaryrefiningladlefurnaceinFushunSteelWorks,Itisfoundthatwhenthemeangrainsizeofcorundumarticlesdecreasesfrom760μmtp650μm,thephysicalpropertiesandservicelifeoftheplugarethesameasthatofimportedone,andcanbenormallyusedintheVHDprocess.
简介:Thispaperintroducesofthedevelopmentandapplica-tionofheavilyburnedmullitedbrickwithhighreractorinessunderloadlowcreep,whichismadeofandalusiefineandcoarsegrains(asaggregate),highaluminabauxiteproducedinYangquancounty,clayproducedinGuangxiprovine,industrialaluminapowderandsilliman-itepowder(asmatrixmaterial)andalittleamountofad-ditivesandbondedwithsyntheticbond.
简介:CurrentlytheservicelifeofCDQshaftsinChinaismainlyrestrictedbythepropertiesoftheinclinedfluebricks.Inthiswork,basedonthesystematicanalysisofthedamagemechanismofinclinedfluerefractories,highperformancemullite-SiCbricksweredeveloped.Thebrickswereproducedbycorundum,andalusite,SiCandotherhighpurityrawmaterials.Metalsiliconandaluminaultramicropowderwereaddedtoformdispersionmulti-phasestructure,fortifyingthematrixandimprovingthemicrostructure.Theproductshaveexcellentpropertiessuchaslowporosity,highdensity,goodwearresistance,highrefractorinessunderload,andgoodthermalshockresistance.Theproductscanreplacetheordinarymullite-SiCbricksandobtainagoodservicelife.
简介:Itisexpectedthatinthenewcentury,tocopewithdevelopmentsofnewhightemperaturetechnologies,anewgenerationofhighperformancerefractoryceramicswillemergeandflourishwhichshouldincludethefollowing(1)oxideandnonoxidecompositescharacterizedbyauniquecombinationofhighhotstrength,highthermalshockresistanceandhighcorrosionresistance;(2)freeCaObearingbasicrefractoriescapableofpurifyingmoltenmetalforimprovingcleanlinessandofabsorbingcontaminantsfromwastegasesforreducingenvironmentalpollution;(3)freeflowingzerocementcastableswithimprovedthermomechanicalproperties,thermalshockresistanceandcorrosionresistanceandgradientcastableswithvaryingmatrixcompositionandvaryingtexture.