简介：Basedontheprincipleofsimilarity,waterwasusedtosimulatetheflowofmoltensteeltoanalyzetheflowfieldinatundish.Severalschemesofthetundish’stracershapeweredesignedandcorrespondingwatermodelexperimentswereconducted.Duringtheexperiments,acomputerautomaticallycollecteddata.Thecomparisonoftheresidencetimedistribution(RTD)curvesdrawnaccordingtothecomputer-collecteddataoptimizedtheschemeandphotographsoriginatedfromtheexperimentswithinkasitstracer.Itindicatesthatthewatermodelcanoptimizetheflowfieldofthetundish.

简介：Thisstudyanalyzesthefactorsofinfluenceon0~#continuouscasterinNo.1SteelmakingPlantofXinjiangBayiIron&SteelCorporation(hereinafterreferredtoasBasteel).Diameteroftundishuppernozzleissmall,andthemoltensteelleakageaccidentshavebeengreatlymanifoldedinthehighcastingspeed.Inordertoincreaseyieldof0~#continuousecasterinNo.1SteelmakingPlantofXinjiangBayiIron&SteelCorporation,andaseriesofameliorationmeasurewasputforward.Throughenlargingdiameteroftundishuppernozzle(fromφ21mmtoφ21.5mm),afterthewaterdistributionofthesecondarycoolingwasoptimized.Basedonstabilizingthequality,improvingtheaveragecastingspeedandworkrateofthecaster,thecapacityofthebilletcontinuouscasterwasimproved.Abetterresultswasgained;theaveragecastingspeedhadbeenincreasedfrom3.04m/minto3.21m/min.Productionofthecasterhadbeenimprovedfrom1005179.926tin2008to1040853.075tin2009.Qualityoftheconcastingbilletsandproductionhadalsobeenstabilized.

简介：Duringtheingotcastingprocess,theparametricchangesofthemoltensteelpouringprocessoftencausebothingotsurfaceandinternalqualitydefects.Withtheincreasinglywideapplicationofcomputersinindustrialtechnology,numericalsimulationsofthemoltensteelpouringprocessenablepredictionsofthedefectsthatwillariseduringthepouringandsolidificationprocess,especiallyforthemoltensteelflowduringtheearlystagesofcasting.Inaddition,usingacomputertosimulatethecastingprocessofa40tingotandsolidificationcanpreventmanydefects.Thesimulationresultsindicatethatcontrollingthepouringspeedtolessthan80kg/s,hangingthecastingpowderinamoldwiththehangingheightmaintainedat100-150mm,andcontrollingthetaperangleofthemoldbrickoutlettoasuitablelevelcanreducetheprobabilityofslagentrapmentandimprovetheinternalandsurfacequalityoftheingot.

简介：BasedonthecharacteristicsofferriticSUS430heatinganddeformation,andcombinedwiththefeaturesofthe1780mmhot-rollingmill,aroughingmodelwasintroducedintwoaspects:optimizingtheroughrollingpassesandimprovingthewidthcontrolprecision.Throughreducingtheroughrollingpasses,theroughrollingtimecanbeshortened,theprecisionrollingstartuptemperaturecanberaisedandtheyieldofthehot-rolledproductscanbeincreased.Moreover,onthepremisethattheslabwidthfluctuationwasgreat,theprecisionofthewidthcontrolcanbeimprovedthroughoptimizingtheparametersofthehot-rollingwidthcontrolmodel.Theresultshowsthattheoptimizationandperfectionoftheoriginalrollingprocessofthestainlesssteel430seriesfurtherimproveditscapacityandproductquality.

简介：Rareearths(REs)areofvitalimportanceforthedevelopmentofnewmaterialsandgreenenergy.Magnesiumbicarbonateisoneofthemostrecyclableandenvironmental-friendlyprecipitantforREsrecoveryfromleachingsolutions.Nd2(CO3)3hasdifficultiesinindustrialproduction.Sointhisstudy,theprecipitationofneodymiumfromchloridesolutionbymagnesiumbicarbonateareinvestigated.Theeffectsoffeedingmethod,[HCO3-]/[Nd3+]moleratio,feedingspeedandreactiontemperatureonyieldandimpurity(magnesia)contentaresystematicallystudied.Resultsshowthattheimpurity(magnesia)contentdecreasesto0.010wt%withayieldapproachingto100%obtainedundertheconditionsof[HCO3-]/[Nd3+]=3.00byparallelflowadditionat50℃.Themajorimpurity(magnesia)inrareearthcarbonatesmainlypresentsintheformofphysicalabsorption,whichcanbeeasilyremovedbyscrubbing.Therefore,itoffersapromisinggreenprocessthatusesmagnesiumbicarbonatetoproduceneodymiumcarbonateduetoitscyclingofcarbondioxide,magnesiumsaltandwastewater.

简介：Baosteeldevelopedadigitalautomaticanalysistechniqueformaceralspecificationin2002.Thisanalysissystemcombinesdigitalimageprocessing,graphics,databases,expertsystems,artificialintelligenceandotheradvancedtechnologies.After6yearsofapplicationincokeproduction,thesystemproveditselfsuccessfulincoalqualitytestingandcoalblendingguidanceonmaceral.However,duringthislongprocess,someinadequacieswerefoundthatimpactedtheprecisionandaccuracyoftheanalysis.So,in2008Baosteelbegantoworkonimprovingthecoalmaceralanalysissystem.Theimprovementsincludedthefollowing:furtherupgradingandenhancingtheanalysisperformanceofmicroscopicimages;extendingthegraylevelstoincreasethereflectancemeasurementaccuracy64times;changingthefocusmethodandeffectivelyeliminatingtheinterferenceofhalo.Inaddition,animprovedimagerecognitionmethodwasadoptedtomaketheextractionofvitrinitemoreaccurateandanewmodelofcoalconstituentalgorithmwasaddedwhichcanaccuratelydeterminethecompositionofmaceral(exinite,vitrinite,inertinite).Sincetheseimprovementswerecompleted,thesystemhasachievedhigherautomation,speedandaccuracy,collectedmoreinformationandperformedmoreaccuratemaceralanalysisforcokeproduction.Meanwhile,theimprovedsystemhasprovidedareliableanalyticalbasisforthefurtherstudyontherelationshipbetweencokequalityandcoalblending.

简介：Furnaceareaisregardedaslooperbetweencastingandhotrolling,whichisveryimportantformaterialflowbalanceandproductionorganizationaswellastemperatureregulationetc.Inparticular,whendealingwithenergysavingandemissionreductionandheatingqualityimproving,pre_heatingfurnaceispaidmoreattention.Theradicaltargetforpreheatingfurnaceistotransferheatingenergyattheleastcost.Asweknow,thepreheatingfurnaceisadissipationsystemtoobeyconservationofenergylaw,thatistosaythatinputenergyalwaysequalstooutputenergy,inthemeantime,thewholeenergyconsumingisnotreversible.Thereforeincreasingtheefficiencyofusingenergyisuppermost.Inthispaper,heatingtransferefficiencyisanalysedandmathematicalexpressionisgivenbasedonconservationofenergylaw.Typicaloptimalmethodstoimprovepreheatingfurnacetransferefficiencycomingfromforeignfactoriesarepresented.Accordingtothesemethods,everyfurnacezonetemperaturesascontrolvariable,targetdischargingtemperatureandtemperaturedifferenceinslabthicknessandthetemperaturebetweenneighbouringzonesaswellaszonetemporarytemperatureasrestrictions,minimalenergyconsumingasoptimizingtarget.Baosteelpreheatingfurnacemodelstructureandthecomplicatedmappingrelationofcontrolparametersetandstatesetandaimsetarepresented.Importantbasicmodelsinthepreheatingfurnacemodelsystemareanalysedincludingtemperaturetrackingmodelandtemperatureforecastingmodelanddischargingpacingmodelandslabheatingcurve.Firstslabtemperaturemodelstructureanditsperiphericparameterareintroduced;secondtwopacingmodelsaregivenincludingtimingpacingmodeusingfixeddischargingintervalandmillpacingcontrolmodeusingmillrollingpacingwhileBaosteelpacingforecastingmodelusinglongtermandshorttermforecastingmode)isgiven;thirdaheatingcurvemathematicalmodelconsideringheatingqualityandrollingpaceandenergyconsumingispresented;

简介：Controlledcoolingtechnologyisgettingmoreandmoreattentionwiththedevelopmentofthermal-mechanicalcontrolprocess.Inthepastdecade,achievingthegivenfinishcoolingtemperaturewasthesolegoalforthetechnology.However,withtheresearchanddevelopmentofnewsteelssuchassuperhighstrengthsteel,researchershaveinrecentyearsrealizedthedeterminateeffectsthatdifferentcoolingpathshaveonthefinishcoolingtemperatureandpaidmoreattentiontothecontrolofthecoolingrate.Thispaperfocusesonnotonlytheoptimizationofthecontrolledcoolingsystemwithhighprecisionandfastcoolingrate,butalsotheresearchanddevelopmentofthehighstrengthsteelplatewithreducedalloyingcomponent.

简介：Amulti-objectiveoptimizationapproachfortherollshiftingstrategyincrossrollingcampaignsofhotstripmillsispresented.Theeffectofdifferentrollshiftingstrategiesonrollwearcontourisstudiedbynumericalsimulation,andtwoevaluationindexes,namelybodysmoothnessandedgesmoothness,areproposed.Theaveragebodysmoothnessandaveragerollingedgesmoothnessofallstripsinarollingcampaignaretakenastheobjectivefunctions,theshiftingpositionsofallwidestripsasthedecisionvariables,andthemulti-objectivemethodofNSGA-Ⅱastheoptimizer.Thusamulti-objectiveoptimizationmodelfortherollshiftingstrategyisbuilt.Thesimulationresultsshowthatworkrollshiftingcanmakewearcontoursmooth,andadish-shapedwearcontourwithoutseverelocalwearcanbeachievedbytherollshiftingstrategywithvaryingstroke.OptimizationexperimentationshowsthatbymeansofNSGA-Ⅱ,agoodPareto-optimalfrontcanbeobtained,whichsuggestsaseriesofalternativesolutionsforrollshiftingstrategyoptimization.Theexperimentationalsoshowsthatthereisaconflictbetweenthetwoobjectives.Finally,applicationcasesconfirmthefeasibilityofthemulti-objectiveapproach,whichcanimprovethestripprofile,reduceedgewavesandextendtherollingmilesofarollingcampaign.

简介：采用5水平Box-Behnken设计的反应表面方法论(RSM)被用来优化铈(III)的biosorption到动物和植物起源viz的biowaste材料上。对虾甲壳(PC)和玉米风格(CS)。各种各样的过程参数viz。pH(一：3.0–9.0)，生物资源剂量(B：0.05–0.35g/L)，起始的金属集中(C：50–350mg/L)，接触时间(D：2–6h)并且温度(E：20–60°C)为优化被选择。木头转变被盒子艇长阴谋在现在的盒子中建议。低p值<0.0001验证了模型的意义。为PC的218.3mg/g和为CS的180.2mg/g的最大的Ce(III)举起在最佳条件下面被注意。在平衡等温线之中，Freundlich模型被发现是而兰米尔模型证明最好适合在CS上建议铈biosorption的同类的模式，在PC上建议biosorption的一个异构的模式的最好适合的那个。这被扫描电子显微镜学(SEM)进一步证实。运动研究显示出作为位于这个过程下面的现象建议physisorption的伪first顺序模型的更好的适用性。电影散开被博伊德阴谋的非线性建议。热力学的研究证明这个过程吸热、自发。FTIR分析在Ce(III)biosorption期间证实了酰胺，胺，酉同类和主要白酒组的参予的主要参与。EDAX分析在Ce(III)biosorption期间证实了碳组的主要参予。这是Ce(III)biosorption的参数优化上的第一份报告到用可能从水的环境对Ce(III)的恢复有用的5水平Box-Behnken试验性的设计的biowaste材料上。

简介：Thesynthesis,compositionoptimization,VUVPhotoluminescence(PL)spectra,andopticalproperties,of(Y,Gd)(V,P)O4∶Eu3+phosphorswereinvestigatedbysynchrotronradiation.TheVUVPLEspectraandthecorrelationamongVUVPLintensity,λem,andEu3+,Gd3+,andP-contentwereestablished.ThePLEspectralstudiesshowedthat(Y,Gd)(V,P)O4∶Eu3+exhibitedsignificantabsorptionintheVUVrange.TheVUVPLintensitywasfoundtoenhancewithPO43-andGd3+-doping.Furthermore,thechromaticitycharacteristicsof(Y,Gd)(V,P)O4∶Eu3+werealsofoundtobe(0.6614,0.3286)andcomparedagainst(Y,Gd)BO3∶Eu3+asareference.Basedonthecharacterizationresults,wearecurrentlyimprovingandevaluatingthepotentialapplicationof(Y,Gd)(V,P)O4∶Eu3+asanewred-emittingPDPphosphor.