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1、INTERCERAM–REFRACTORIESMANUALI/2014133SpecialTechnologieSQ.Jia*,J.Zhang*,T.Ge*,X.Liu*EffectofTemperatureandAdditivesontheHydrationBehaviourofMgOPowdersTheauThorabsTracTKeywordsThecorrespondingauthor,Dr.HighperformanceMgO-basedcastableshavemanyadvantagesforrefin-hydrationbeha
2、viour,XinhongLiu,isanAssociateingcleansteel.However,hydrationofMgOpowderlimitstheapplicationMgOpowders,brucite,ProfessoratZhengzhouUni-ofMgO-basedcastables.Theeffectsoftemperature,hydrationtimeandmicrosilica,calciumversity.Shehasconductedadditives(calciumaluminatecementandmi
3、crosilica)onthehydrationaluminatecementprojectsintheareasofrefrac-behaviourofMgOpowdersareinvestigatedinthispaper.TheresultsINTERCERAM63(2014)[3]toriesandceramicsandhasshowthatthehydrationcontentofMgOpowdersincreasesnoticeablyauthoredmorethan40arti-withanincreaseofhydrationt
4、imeandtemperature,indicatingthatthecles,2booksand6patents.intensityofbrucite(Mg(OH)2)diffractionpeaksandthebruciteamountE-Mail:liuxinhong@zzu.edu.cnincrease.With5mass-%microsilicaorcementaddition,theamountofhydratedproductMg(OH)2decreasesnoticeablyfrom26to11mass-%and19mass-%
5、.Microsilicahasaretardinginfluenceonthehydrationofmagnesia.1Introductionrateincreasesexponentiallywiththetem-2ExperimentalMagnesiumoxideisanindispensablerawperatureabove90–100°C.ParticlesizeandTherawmaterialswerefusedMgOfinesmaterialforbasicrefractoriesduetoitshighchemicalco
6、mpositionofMgOpowders,es-(<0.044mm,Chinesecommercialproduct),meltingpointandgoodcorrosionresistancepeciallyofB2O3contentandCaO/SiO2ratio,calciumaluminatecement(Lafrage,Secartohighbasicityslaginsteelmakingprocess-arealsoinfluencedbythehydrationrateof71)andmicrosilica(Elkem,97
7、1U,Norway).es.Highperformancebasicmonolithicre-magnesiafines.MagnesiaaggregateswithThechemicalcompositionofthesefusedfractorieshaveattractedstronginterestandlowerMgOcontentandlowerCaO/SiO2magnesiafinesisMgO97.04mass-%,SiO2attentionforcleansteelproductionduetoratiotendtoshowr
8、atherhighhydration1.42mass-%,CaO1.24mass-%,Fe2O30.48manyuniqueadvantages.Mg
