简介：Traditionally,austeniticstainlesssteels304and316havebeenemployedincoastalregionsasroofingmaterialsunfortunately,theyareexpensiveandnotfullyresistanttopittingcorrosionunderseverecoastalcorrosiveenvironment.AferriticstainlesssteelB445Rwasdeveloped.Comparedwithaustenitic316L,B445Ris①lesscostly;②uperiorcorrosionresistantwithminormaintenanceforlong-termservice;③insusceptibletothermaldistortionintheweldingseam.B445Rsheetshowsahigheryieldstrengthandlowertensilestrength,lowerelongationandlowerwork-hardeningthanaustenitic316L.Itcanbeeasilyfabricatedanddeformedjustlikeplaincarbonsteel.Afterbending180o,thereisnooccurrenceof'cracking'ornoticeable'orangepeel'.Theformabilityoftheweldingseamisalsosatisfactory.ThepittingpotentialofB445Ris650mV,largerthanthatof304and316L,asshowninFig.1.ThecorrosionrateofB445Rsubmergedin6%FeCl,solutionis0.3-0.56g/(m2?h-1),muchlowerthanthatof316L,asshowninFig.2.ThesuperiorpittingcorrosionresistanceofB445RcanbeascribedtosynergeticeffectofhigherCrandMo.Dull-finishedB445RsheetshavebeenemployedastheroofingmaterialsforGuangzhouAsianGamesArena,asshowninFig.3.About380tof1.0mmB445Rwithdullfinishwasusedforroofingpanels.About100tof0.8mmB445Rwithhairlineorfluororesinpaintfinishwasusedforsidewallpanels.Thecompositeroofbuild-up（fromuptobottom）includes:①shinglesofferriticstainlesssteelB445R;②Kalzip-typestandingseamofaustenitic304;③water-proofDFM;④structuralsteel;⑤75mmthickinsulation;⑥secondarypurlinof150mm×100mm×4.5mmofgalvaniziedQ235;⑦0.8mmthickprofiledeckofgalvaniziedQ235;⑧acousticinsulation.Theroofingshinglesorpanelswiththesamewidthbutdifferentlengthwereformedbybendingfoursidesandfixedtoa'L'shapereinforcingframesofstainlesssteelbyfasteners.The'L'frameswasconnectedtoribsofthestandingseambyacl

简介：Thedull-finishferriticstainlesssteel(FSS)sheetB445RforarchitecturalroofinghasbeendevelopedbyBaosteel.ThissteelproductexhibitsexcellentcorrosionresistancesuperiortothatofSUS316Lwithalowercost.Itcanbeeasilyformedintoroofingpanelsbyordinaryprocesses.Moreover,thethermalstrainofitislessthanSUS316Lbecauseofitslowerthermalexpansioncoefficient,anditsreflectivityislowerduetothedull-finishtreatment.Allofthesefeaturesmakeitcapableofbeingusedasarchitecturalroofingmaterialsincoastalregions.

简介：Improvingefficiencyinrollgrindingprocessisacriticalissueinthesteelmill.Eachrollhastobegrindedtoawell-definedprofileandthentobemeasuredforqualitycheck.However,thesurfaceconditionsareinspectedbyusingdifferenton-lineinspectionprobesequippedonthegrinder.Therollnumberisauniqueinformationwhichcanbeusedtomergewithahugeamountofmeasurementdatasothattheconditionofeachrollisfullymonitored.Oneofthekeyfactorsthathindertheefficiencyinsuchprocessistheerrorsandtimeconsumptionduetohumanintervention.Inordertomitigatetheseissuesandtorealizethefullyautomaticgrindingprocess,radiofrequencyidentificationtechnology(RFID)couldbeasolutionandhasbeendevelopedinthispaper.ItiswellknownthatwhenanRFIDtagisplaceddirectlyuponametallicobject,intheabsenceofagaporasubstrate,itfunctionsratherpoorlyandevenbecomestotallydysfunctional.Thislimitation,inturn,posesarealbarriertotheuseoftheRFIDonmetallicobjects.ThispaperproposesaminiatureRFIDtagantennadesignforapplicationonrollnumberidentification.TheexperimentaltestsshowthatthemaximumreadrangeoftheproposedRFIDtagplacedonarollisapproximately1.5mandtheoverallsizeisonly32×18×3.2mm~3.AnRFIDsystemforrollnumberidentificationwasusedinarollshopandseveralremarkableimprovementswereachieved,includingthecompletelyautomaticgrindingprocessandtheerror-freeidentification,aswellasthehighpersonnelsafetyoperation.

简介：据东方电气集团最新消息：2013年5月10日，由东方电气（广州）重型机器有限公司承制的、首次采用本公司生产的690合金U型传热管的防城港核电项目i号机组蒸汽发生器，顺利完成出厂前的水压试验，并取得圆满成功。该蒸汽发生器的水压试验包括一次侧水压试验和二次侧水压试验。该水压试验的目的是进行强度和密封性检验。

简介：Baosteel's60000m3/hairseparationunit(ASU)isthelargestoxygengeneratingsysteminChina.Theoperationalcostofsuchagiantsystemisveryhigh.Howtoreducetheoperationalcostisacriticalissue.Thispaperdiscussesthesystem'scharacteristics,thecurrentoperationalstatusandthedifficultiesinreducingthecost,andanalyzesrelevantindicators,suchasthetechnicalandeconomicalindicatorsofindividualunitsandsystemsaswellastheindicatorsconcerningthecosts.Therelationshipbetweenthecostandeacheconomicalindicatorandmeasurestooptimizeaneconomicaloperationoftheoxygengeneratingsystemarealsodiscussedinthispaper.

简介：针对鞍钢5号中薄板坯连铸机技术改造工艺布局所遇的种种障碍，阐述在老厂保产条件下快速、高效完成机电安装。同时，应用了在线设备专家诊断系统、二次冷却、漏钢预报等新技术。

简介：Foritspoorfilmformingandwater-resistanceproperties,waterbomeepoxysystemisnotappliedfortheprotectionofsteel.Themainreasonfortheseproblemsisthattheemulsifieroftheemulsifyingefficiencyisnothighwhilecannotbeseparatedouteasily.Now,intermsoftheuseofnewlysynthesizedemulsifierstoimprovethesetwoshortcomings,anewsystemwasdeveloped.Comparedwithsolvent-basedcoatings,thisnewwaterbomeepoxysystem’scorrosionresistancewasfoundclosetothesolvent-basedones.Finally,theapplcationofthisnewwaterbomeepoxysystemfortheprotectionofsteelisdiscussedbriefly.

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简介：有色金属的分类很多，大约有80多种，大致按其比重、价格、在地壳中的储量及分布情况和被人们发现与使用情况的早晚等分为五大类。（1）重有色金属；指比重大于4．5的有色金属。包括铜，镍，锢，铅，锌，锑，汞，镉和铋。（2）轻有色金属；指比重小于4．5的有色金属。包括铝，镁，钙、钾、锶和钡。（3）贵金属；指在地壳中含量少，开采和提取都比较困难，对氧和其它试剂稳定，价格比一般金属贵的有色金属。包括金、银。和铂族元素。一般比重都较大，熔点较高在916—3000度，有很好的化学稳定性、优良的抗氧化性及耐腐蚀性。（4）半金属；一般指硅、硒、碲、砷和硼五种元素。其物理化学性质介于金属和非金属之间。如砷是非金属，但它能传热和导电。

简介：Thispaperanalyzesthecurrentdifficultiesencounteredinon-lineinspectionsystemsofstripsurfacequality,specificallyrelatingtoproblemswithreal-timeprocessingofhugeamountsofdata.Toaddressthisneed,thispaperdescribesanFPGA-basedhigh-speedimageprocessingmodulewithbothhardwareandsoftwareaspects.Improvingthesetwoaspectstogetherwillhelpthesystemachievereal-timeprocessingofmassiveimagedata,andsimplifiesthearchitectureofthestripsurfacequalityon-lineinspectionsystem.

简介：Inthispaper,theflatnesscontroltechnologyAnShaperTMforcold-rollingmillandindustryapplicationareintroduced.AnShaperTMincludes;partitioningpiezomagneticshapemeterforflatnessmeasurementforcold-rollingstrip;flatnessmeasuredsignalsprocessingsystembasedondigitalsignalprocessing（DSP）;flatnessfeedbackcontrolmodelsystembasedonthecontrolefficiencyofflatnesscontrolactuatorsandmodeladaptivefunction.TheapplicationverifiesthatstripflatnesscanmeettheneedofhighqualityproductbyusingAnShaperTM.Theaverageflatnessqualityisabout5Ⅰ-unitandthe0.18mmultrathinthicknessstripflatnessis10Ⅰ-unit.

简介：AccordingtothecharacteristicsofPQFcontinuousrollingpass,therelationshipbetweenspreadcoefficient,wallthicknesscoefficientandelongationareanalyzed.Thesectionshapeoftubeineachstandoutlet,theefficientworkingradiusandtherotationalspeedofeachrollareobtained,therefore,thepassparametricdesigniscompleted.Athermal-mechanicalcoupledmodelofcontinuousrollingtube’sformingprocessisestablishedbythethree-dimensionalelasto-plasticfiniteelementmethod,thesectionshapeandareaoftubeineachstandoutletareforecasted,whichisusedtomodifythepass.Therollingforceofeachrollerispredicttoo,whichprovidesaguidanceforpassdesign.Inaddition,avisualsoftwareofPQFpassparametricdesignsystemonheavycalibreseamlesstubeisgeneratedwithVisualBasic.Theformingdimensionoftubeandtherollingforceofeachrolleraresuccessfullyobtained,bysimulatingtheformingprocessofacertainseriesheavycalibreseamlesstube.Thissystempossespracticalutilizationvalue.Byusingthissystem,thedevelopmentcycleofnewproductcanbeshortened,thereliabilityofpassdesigncanbeimproved,andtheenergyconsumptionofrollingmillandproductioncostcanbedecreased.

简介：BasedontheanalysisresultsofthedustsizedistributionoffluegasfromBaosteel'sshort-flow(BSSF)slagprocessingsystemandthemechanismofthewetscrubber,awetscrubbersystemwasdesignedandinstalledintheNo.1BSSFslagprocessingsystematBaosteel.Theresultsshowthatthedustremovalefficiencyoftheprevioussystemthathadconventionalwaternozzleswasonly69%withaliquid-gasratioof0.79L/m3,whilethedustremovalefficiencyreached94%whenthreesetsofhigh-efficiencydualphasespraygunswereinstalledinsideboththeflueandthechimney.Forthelattersystem,theliquid-gasratiowas0.84L/m3,andthedustconcentrationinthecleanedemissionsreducedtolessthan40mg/m3.

简介：Thispaperintroducesworkingprincipleandtechnicalfeaturesofvacuumfilterinemulsionsystemfortandemcoldstripmill.Basedonspecificcases,thispaperanalysesandassessestheeffectbeforeandafterusingtheemulsionsystemwiththeusageofthevacuumfilterforstripmill.Comparewiththeeffectwhenusingthefirstgenerationvacuumfilter,theemulsionqualityisimprovedsignificantlybyusingthesecondgenerationvacuumfilter,whichatthesametimeensuressteadyoperationoftherollingmillandsurfacequalityofthemillproducts.Asaresult,investmentandrunningcostsarelowered,emissionsofthewasteemulsionarereduced,wastewatertreatmentcostsarereducedandsoastheenvironmentalpollution.Itcanbeseenthesecondgenerationvacuumfilterhasobviouseconomicandenvironmentalbenefits.Therefor,itsuggeststhatthefiltershouldbeusedwidelyinthefieldofautomotive,environmentalprotectionrollingsteelandnonferrousmetals.

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简介：从离子型稀土矿床的地质特征与原地浸析采矿的工艺特点及其应用条件出发，首次时我国南方的离子型稀土矿进行具体分类．阐述了分类的原则、各类别特征及在原地浸析采矿工艺中特点，最终提出了分类总表。

简介：受原燃料市场以及销售市场影响,鄂钢面临前所未有的压力,因此降低生铁成本成为高炉生产的主要任务。6号高炉通过采用降低矿石成本、降低高炉燃料比等措施,不断探寻低成本冶炼的方法。

简介：1996年12月31日我厂2号高炉停炉大修。炉容仍为300m~3,由原来10个风口改为12个风口。炉底、炉缸采用自焙炭砖——陶瓷砌体,水冷炉底、水冷炉喉钢砖。设计顶压60kPa,料车由2.5m~3改为2.8m~3。1997年2月25日点火开炉,开炉后两个月内未能

简介：介绍了5号高炉消音器的改造情况,及QP-TX气体排散特效消声器的结构和特点。

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