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简介：TheinfluenceofthreedifferentAl2O3powderonself-flowingaluminacastablewasstudied.MaximumcompactionofsamplewascomputedbyAndresenEquation.TheresultshowedthattheAl2O3powder,whichhasmuchsmallerparticlesize,couldimprovethemicrostructureandthemechanicalpropertiesofcastableunderroomtemperatureandhightemperature.Withthesamepowdersize,theroomtemperaturestrengthofthecastableaddedwithAl2O3powderproPertiesofwhichwerealteredbyaddingmineralizingagent,washigherthanthatofthecastableaddedwithcommonAl2O3powder,buttheflowabilityofthesethreedifferentcastablewasalmostthesame.

简介：Thestabilizationofγ-aluminiumoxyni-tridespinel(γ-AlON)hasbeeninvestigatedbyadditionofMgO,MgAl2O4,etc.,inreactionprocess.Theresultsindicatedthattherearewidersolidsolutionareasnear,Al2O3-richsideinAlN-Al2O3-MgOternarysystems,ThecontentofstabilizedAlONphaseinsamplesisrelatedtoheatingtemperatures,additives,etc.ThelatticeparametersoftheirAlONphasescouldbewelldescribedbytheequation:a0=0.7900+0.0375[MgO]+0.015[AlN](nm)

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简介：Theroleofnano-SiO2andultra-fineboroncarbideonthepropertiesofalumina-graphitematerialswasinvestigated.Thestudyshowedthattheultra-fineboroncarbideaddedmodifiedthemicrostructureofresidualcarbonandpromotedthechemicalbondbetweenresidualcarbonfromphenolicresinandflakegraphite.Thecarbonwhitecouldstrengthentheresidualcarbonfromphenolicresin.ThesetwoadditivesimprovedthemechanicalpropertiesofAGrefractoriesatbothroomtemperatureandhightemperature,andthermalshockresistancewasimprovednoticeably.Whenthetwoadditivesweredopedtogether,carbonwhitecouldretardtheevaporationofB2O3.Thermalshockresistancewasguaranteedwithasmalleramountofultrafineboroncarbide.

简介：本文对氯乙烯装置的两台裂解炉辐射段SUS347HTB炉管进行了综合研究，包括对材料的化学成分分析、硬度测定、宏观检查、金相检查、高温持久强度等试验，并对炉管经长期使用后的材质损伤与性能退化进行了分析，对炉管剩余寿命进行估算，得出的结论已在实际生产中起到了指导作用，并产生了经济效益。

简介：据总部位于美国休斯敦的咨询公司TownsendPolymerServices＆Information的最新研究报告显示，未来3年全球塑料添加剂市场需求有望以年均4．59，6的速度快速增长。这些增长的动力以及全球化进展和来自监管的压力正在重塑这个总市值达320亿美元的市场。

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简介：α-Fe^2O^3材料在陶瓷、催化剂、颜料、防腐、感光材料和磁性材料等方面都有着重要的应用，而且因其原料来源丰富、用途极广，因而受到格外关注。所以，均分散α-Fe^2O^3胶体粒子的制备，不仅在理论研究具有较高价值，而且在实际应用上也有重要意义。

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简介：将聚偏氟乙烯（PVDF）和阳离子交换树脂（PS-SO3H）、单甘酯（GMS）以适当的比例充分混合均匀,经造粒机挤出即得到新型PVC膜改性助剂。最佳工艺条件为：配比PVDF/PS-SO3H/GMS为82∶14∶4,用于PVC膜混合料,PVC树脂/PVC膜改性助剂的最佳配比为85∶15,加入膜改性助剂后,膜制品的透水率得到提高,力学性能也有所改善。

简介：河南省焦作市多氟多化工有限公司近期投资1．2亿元兴建年产3万吨无水氟化铝生产线。

简介：Thespecimenswerepreparedbymoldingthemixtureofsilicafume(w(SiO2)=94.5%;averageparticlesize:0.08μm)andsiliconnitride(≤0.074mm)withamassratioof11,carbonembeddedfiringat1300℃,1450℃,1500℃,1550℃and1600℃for3hinair,andthenwater-cooling,respectively.Themicrostructureandphasecompositionofthespecimenswereanalyzed.Theresultsshowthat:(1)silicafumereactsobviouslywithSi3N4formingSi2N2Oabove1550℃.TheedgesandcornersofSi3N4grainsbecomesmoothandtheSi3N4grainsdistributeinthecontinuouscementationphaseofSi2N2OformingthedensestructureofSi2N2OpackedSi3N4;(2)below1500℃,theedgesandcornersofSi3N4grainsareclear,Si2N2Odoesn'tform,andonlySiO2crystallizesfromsilicafumewhichhappensobviouslyat1300℃.

简介：介绍了一起150m~3/h空分设备分镏塔主冷发生的爆炸事故,原因是油脂带入塔内,液氧中可燃物质摩擦生成热或静电火花。并评述了防止措施。图1。

简介：简介了承德杭氧25600m~3/h空分设备的工艺流程和主要性能指标,从塔体管道设计、主换热器布置和单元设备选择等方面介绍了对空分设备所进行的优化设计。优化设计后空分设备的运行可靠性和安全性大大提高。

简介：Researchonnewtypesofcastables,pre-castassemblypartsandthermalinsulationmaterialswithgoodresistancetowear,thermalshockanderosion,andlowthermalconductivity,wasdonetosolveproblemsofhighsystemenergyconsumption,crackingandspallingofpartialliningandmismatchoffurnacetopmaterialandhangingmaterialandsoon,causedbyunreasonabledesignofChina'sAl(OH)3dilutephasefluidizedbedroastingfurnacelining.Severaldifficultproblemssuchasthematchingofdifferentmaterials,preservationofexpansionjointsamongdifferentzonesandreasonablemechanicaldistributionofliningweresolved.'Integratedfurnace'conceptwasestablishedincludingrefractoriesR&D,liningstructuredesign,constructionoptimization,furnacewarmingtechnology,initialoperationandliningmaintenancetechnology.Thekeytechnologiesofhigh-efficiencyandenergy-savingforfurnacesweredeveloped.TheseachievementshavebeenappliedtoChina'sAl(OH)3dilutephasefluidizedbedroastingfurnacestoreduceenergyconsumptionby1000MJpertonalumina,enhancethecapacityandreducetheexhaustgasemission.

简介：介绍了渭化400kt／a甲醇装置原始开车准备工作、开车过程、触媒升温还原情况及生产运行情况，重点阐述原始开车过程中出现的主要问题及相应的解决方法。

简介：简介了大型高纯氮设备配套膨胀机的技术参数及要求,结合5000m3/h高纯氮设备膨胀机的设计经验,分析了膨胀机设计中的主要技术难点的解决方法及方案优化;同时,结合现场试车数据对膨胀机进行了性能分析。

简介：Inordertoimprovetheservicelifeofcorundumliningforinductionfurnace,corundumdryrammingmixwaspreparedusingbrowncorundum,fusedmagnesia,andα-Al2O3micropowderasmainstartingmaterials,andtheinfluenceofα-Al2O3micropowderadditions(0,1%,2%,and3%,inmass)onpropertiesofcorundumdryrammingmixwasinvestigated.Theresultsshowthatafterheattreatingat1600℃,withtheincreaseofα-Al2O3addition,thepermanentchangeindimensionsonheatingofthespecimensdecreasesfirstlyandthenincreases,bulkdensityincreases,apparentporositydecreases,andthecrushingstrengthdeclinesfirstlyandthenenhances;whentheadditionofα-Al2O3is2mass%,thepermanentchangeindimensionsonheatingofthespecimensisrelativelysmallandthecrushingstrengthdecreasesto22.8MPa.TheXRDandSEMresultsshowthatafterfiringat1600℃for3hsmallgranularmagnesiumaluminatespinelformsandiswelldistributed,whichenhancesthedensity.

简介：开发了一种适用于合成气、高含量CO气、乙烯、富烃气、高纯氢气等气源的TO-3贵金属脱氧催化剂。该催化剂低温活性好、选择性高，使用空速高（-6000h-1），可将原料气中0．002％-1．0％的氧脱除至（1-10）×10^-6（V/V）以下，且与CO副反应少。多种实际工况条件下的应用表明，TO-3贵金属脱氧催化剂性能优异、稳定性好。