Zhengzhou Kaixiang Refractories Co., Ltd.

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火电厂锅炉不定形耐火材料的发展
火电厂锅炉不定形耐火材料的发展
火电厂锅炉不定形耐火材料的发展
Time of issue : 2020-02-16 20:26:00
70年代前期，随着冶金系统武钢一米七工程和电力系统大港、元宝山等许多工程的引进，耐火可塑料在我国得以迅速发展，该材料具有热震稳定性好等诸多优良性能，取得了较好的使用效果。随着应用范围的扩大，存在的问题也很突出，可概述如下：(1)可塑料呈胶泥状，需捣固或捣打施工，工期长，劳动强度大。(2)可塑料是在耐火材料厂经配料、混炼、脱气后制成各种需要的形状，并密封包装，到现场直接使用的。虽然省却了现场拌和的过程，但随着存放时间的延长，保水性降低，水分散失而变硬，围绕保存期给生产者和使用者带来了许多麻烦。(3)为延长保存期，许多生产厂往往采取多加生粘土和水的办法，干燥时收缩大，产生严重干裂，干燥后强度低，影响使用寿命和效果。(4)结合剂用量大，高温加热时低融物多，1000 ℃以上产生明显收缩。如不加膨胀剂，1350 ℃热处理后，总收缩可达7%，强度随温度变化大，抗剥落、开裂性差。
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我公司参加“2018 年全国高炉炼铁学术年会”
我公司参加“2018 年全国高炉炼铁学术年会”
我公司参加“2018 年全国高炉炼铁学术年会”
Time of issue : 2020-02-16 20:26:00
2018年10月17-20日，由中国金属学会炼铁分会主办的“以创新驱动技术进步，努力实现低碳绿色炼铁”为会议主题的“2018年全国高炉炼铁学术年会”在西安市西安宾馆召开。我公司副总经理刘广辉携相关人员出席此次会议。
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耐火材料：抓住行业整合契机
耐火材料：抓住行业整合契机
耐火材料：抓住行业整合契机
Time of issue : 2020-02-16 20:26:00
耐材行业有“两高”，原材料占成本的比例高于50%，毛利率高达30%以上，远高于一般制造型企业。主要原因是耐材行业对技术有着比较高的要求，而且下游企业需要得到稳定的有质量保证的耐火材料，以保障其生产的持续性、稳定性与安全性。
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Our company participated in the "2018 National Blast Furnace Ironmaking Academic Conference"
Our company participated in the "2018 National Blast Furnace Ironmaking Academic Conference"
Our company participated in the "2018 National Blast Furnace Ironmaking Academic Conference"
Time of issue : 2020-02-16 20:26:00
FromOctober17thto20th,2018,the"2018NationalBlastFurnaceIronmakingAcademicAnnualConference"hostedbytheChinaMetallurgyIronmakingBranch"Innovationdrivestechnologicalprogressandstrivestoachievelow-carbongreenironmaking"washeldinXi'anXi'anHotelwasheld.LiuGuanghui,deputygeneralmanagerofourcompany,attendedthemeetingwithrelevantpersonnel.　　 　　 　　此次“全国高炉炼铁学术年会”是由原“中小高炉学术年会”和“大高炉学术年会”合并召开的炼铁盛会。今年的会议重点围绕炼铁行业热点问题，共同探讨新形势下高效、低耗、长寿、绿色、智能的炼铁生产技术与最新科技成果。　　10月18日，中国金属学会专家委员会王天义，陕钢集团党委副书记、工会主席陈敏锋分别在会上致辞。陕钢集团陈副书记代表其集团对到会代表表示热烈欢迎，并对当前钢铁形势进行了分析和展望，强调炼铁技术转型升级是重点关注的问题，倡导大家广泛交流，加深交流，在交流中取长补短，寻求进步提升。　　大会还在持续进行中。会议还将安排炼铁分会主任委员杨天钧教授做主题报告，同时邀请多位来自企业和大学的专家教授做炼铁生产及技术发展专题报告。会议组织安排多个分会场进行炼铁原燃料、高炉操作、高炉长寿、资源环保等多方面的论文交流。此外还安排炼铁厂长论坛，进行专家答疑。
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Refractories: Seizing Opportunities for Industry Consolidation
Refractories: Seizing Opportunities for Industry Consolidation
Refractories: Seizing Opportunities for Industry Consolidation
Time of issue : 2020-02-16 20:26:00
The refractory industry has "two highs". The ratio of raw materials to costs is higher than 50%, and the gross profit margin is higher than 30%, which is much higher than that of general manufacturing enterprises. The main reason is that the refractory industry has relatively high requirements for technology, and downstream companies need to obtain stable, quality-assured refractories to ensure the sustainability, stability and safety of their production.
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Development of Unshaped Refractories for Thermal Power Plant Boilers
Development of Unshaped Refractories for Thermal Power Plant Boilers
Development of Unshaped Refractories for Thermal Power Plant Boilers
Time of issue : 2020-02-16 20:26:00
ThedevelopmentofamorphousrefractoriesinChinacanberoughlydividedinto3stages:　　Beforethe1970s,thevarietiesweresingle,mainlyaluminacementcastable,phosphatecastable,waterglasscastableandasmallamountoframmingcastable.　　Intheearly1970s,withtheintroductionofmanyprojectssuchasthe1.7-meterprojectofWISCO'smetallurgicalsystemandDagangandYuanbaoshanofthepowersystem,refractoryplasticsdevelopedrapidlyinChina.Thematerialhasmanyexcellentpropertiessuchasgoodthermalshockstability,andhasachievedGooduseeffect.Withtheexpansionofthescopeofapplication,theexistingproblemsarealsoveryprominent,whichcanbesummarizedasfollows:(1)Plasticcanbeintheformofcement,whichrequirestampingorrammingconstruction,longconstructionperiodandhighlaborintensity.(2)Plasticcanbemadeintovariousrequiredshapesintherefractoryplantafterbatching,mixing,anddegassing,andthensealedandpackagedfordirectuseonsite.Althoughtheon-sitemixingprocessisomitted,asthestoragetimeisprolonged,thewaterretentioncapacityisreduced,andthewaterisdispersedandhardened,whichbringsalotoftroubletotheproducersandusersaroundthestorageperiod.(3)Inordertoextendtheshelflife,manyproductionplantsoftenadoptthemethodofaddingextraclayandwater.Whendrying,theshrinkageislarge,severecrackingoccurs,andthestrengthafterdryingislow,whichaffectstheservicelifeandeffect.(4)Theamountofbinderislarge,andtherearemanylowmeltingmaterialswhenheatedathightemperature,andobviousshrinkageoccursabove1000℃.Ifnoexpansionagentisadded,afterheattreatmentat1350℃,thetotalshrinkagecanreach7%,thestrengthchangesgreatlywithtemperature,andtheresistancetospallingandcrackingispoor.　　Inordertomakeupfortheabove-mentionedshortcomings,aclay-boundcastablewasdevelopedattheendofthe1970s,anditsperformanceisbasicallyequivalenttothatofrefractoryplastics.Itcanalsobepouredforconstruction,andtheshelflifeisgreatlyextended.Itquicklyreplacedrefractoryplastics,andwaswidelyusedinthermalequipmentsuchassoakingfurnaces,heatingfurnaces,andironditches.Sincetheconstructionqualitycanbeguaranteed,theuseeffectismoreexcellent.However,thestrengthatroomtemperatureistoolow,whichlimitsitsdevelopment.　　Sincethe1980s,inordertoreduceresourcewaste,varioushigh-performancesyntheticrawmaterialshavebeenmanufacturedinlargequantities,especiallylow-cementcastables,ultra-low-cementcastables,cementlesscastables,andself-levelingrefractorypouring.Thesuccessfuldevelopmentofmaterialsreducestheharmcausedbylow-meltingsubstancesandharmfulgasesduringtheuseofcementcastablesandchemicallycombinedcastables,andthephysicalpropertiesofcastableshavebeensignificantlyimproved.Thesematerialshavebeenusedinindustrialfurnacesandtheirfurnacelifehasincreased3~5times.　　Practicehasprovedthatthesematerialsareequallyapplicabletovariouspartsofboilersinthermalpowerplants.Theboilersinthermalpowerplantsshouldalsochooserefractorymaterialsfordifferentconditionsofuseandformaseriesofproductssuitableforpowerplantsinordertoachievethebestenergysavingandlonglife.
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