简介:山西省晋城依托煤炭资源优势,甲醇产业呈现强劲的发展势头。目前,天脊晋城化工公司联产5万t甲醇、兰花一化联产3万t甲醇项目已建成。高平丹峰化工有限公司年产30万t甲醇项目已经开工,总投资7.5亿元,全部投产后将实现年销售收入6亿元。天脊高平化工公司联产7万t甲醇、晋丰化工公司联产6万t甲醇、兰化集团150万t甲醇、沁水天和化工公司联产12万t甲醇等项目也在建设中。其中兰花集团的一位官员在2006年2月13日声称,该公司的以煤为原料的150万t/a甲醇和100万忱二甲醚(DME)将根据市场状况分2或3个阶段进行建造,第一阶段的项目是一座20万t/a甲醇装置和一座10万t/aDME装置,将于2007年底建造,生产的DME将作为燃料在国内市场上销售。
简介:Thedevelopmentofefficientbondingagentsisoneaspectoftheadvancementofrefractories.Basedonanewlydevelopedbindersystem,anewgenerationoftar-resinbondedmagnesiacarbonproductswithhighperformancehasbeendeveloped.Furthermore,thebindersystemcharacterizedbyhighcarbonyieldaftercarbonizationresultsinforminganextremelystrongcarbonbonding.Itcanimproverefractoriespropertiestogetnewproductwithmoreadvantagesthanoldrefractories:moreeconomic,lowercostandlowtoxicity.Tar-resinisnotonlyusedinshapedrefractories,butalsoinmorerefractoriestypes,suchasmonolithicrefractories.ImmersionexperimentsofMgO-Cmonolithicrefractoriessamplesinliquidsteelat1600℃havebeencarriedoutforsteelmakingindustry.TheseexperimentsshowedtheformationofadenseandcontinuousMgOrichlayer,ontheinterfacebetweenrefractoryandsteel,andthepossibleformationofinclusionsaslargeclustersprotrudingfromtherefractorysurface.Forthemechanicalproperties,thepowderwasheatedupto1400℃inairtoremovecarbon,andwassubsequentlyformedintobrickshape.StandardASTMwasusedtodeterminetheMOR,porosityanddensity.Itisfoundthatantioxidantmaterialsplayanimportantroleinimprovingthemechanicalproperties.
简介:Simplethree-pointbendingtestatambienttemperaturecharacterizedthemechanicalbehaviorofburnedAl2O3-Crefractoriesbeforeandafterthermalshockinassociationwiththeprocessingparameters(graphitecontentandcokingtemperature,etc.).Theresultsshowedthatnon-linearplastic-elasticbehaviorunderloadlowerthancoldmodulusofrupture(CMOR)wasregisteredinallspecimensandreallinearelasticbehaviorcouldbeidentifiedafterthefirstload.Thetotaldeformationcouldbedividedintotwoparts,plasticandelasticareas.ThegraphitecontentandjointbondingsystemofcarbonandceramicphaseswereresponsibleformechanicalbehaviorofAl2O3-Crefractories.
简介:MobarakehsteelCompanyproduces3milliontonsofsteelannuallywitheight180tonsEBTfurnaces.Differenttypesofmagnesia-carbonrefractorieshavebeenemployedatslaglineduringlast5years.InthepresentstudythewearandcorrosionofMgO-Crefractoriesofthesefurnaceshavebeenstudiedviapost-mortemanalysisofusedbricksandtheobservationofoperationaleffects.Laboratorycorrosiontestswerealsoarrangedtoinvestigatetheeffectofslagchemistryandthemechanismofchemicalcorrosion.Characterizationofdifferentmagnesia-carbonbricksclarifiedthatthecrystalsize,typeandchemistryofmagnesiaaswellasgraphitestructurehavethemaininfluenceoncorrosionresistance.TheCaO:SiO2ratioinslagalsoplaysavitalroleinthewearofslaglinerefractories.Theironoxidecontentofslagalsohasamajorroleingraphiteoxidation.Ofmetallurgicalparameters,theelectricpowerinputandthecontacttimehavegreatinfluenceonrefractorieslife.TheresultswillbediscussedwithemphasisonparticularoperationalfactorsinMobarakehsteelplant.
简介:供方应根据GB/T19000—ISO9000有关标准要求,质量体系应能对所有影响质量的因素进行检查而连续的控制活动,应重视并采取预防措施以避免问题的发生。程序和规定是质量体系文件的主要组成部份,它们包括质量手册;控制程序文件;工作指导书,包括工作指令,路线卡片;图纸;规范;试验和检验计划或要求;记录;采购规范、订单和确认书;合同、合同复审资料;审核计划和记录;管理者复审。设计复审。所有涉及质量体系使用的表格,产品历史档案等。以上这些活动是构成一个文件化有效运作的质量体系,才能实现GB/T19000—ISO9000质量保证体系认证的最终目的,提高企业的整体管理水平。
简介:由国家质量监督检验检疫总局和国家标准化管理委员会发布的GB/T4100-2006《陶瓷砖》国家标准(简称新国标)于2006年9月1日正式实施。
简介:Hexagonplate-likeAl8B4C7powdersweresuccessfullysynthesizedusingamixtureofdiborontrioxide,activatedcarbonandaluminumoraluminabyacarbothermalreductionprocess.TheeffectofAlsourceandstartingmaterialsadditionsonsynthesisofAl8B4C7wasinvestigated.ThephasecompositionandmicrostructureofAl8B4C7powderwerecharacterizedbymeansofXRD,SEMandEDS.ThemainphasecompositionsoftheproductssynthesizedfromAl,B2O3andactivatedcarbonareAl8B4C7andAl2OC.Al2O3canreplaceAltosynthesizeAl8B4C7.Al8B4C7grainssynthesizedfromAl2O3,B2O3andactivatedcarbonarehexagonplate-likeandhaveathicknessof10μmandasizeofabout100μm.