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:ThispaperintroducedtheresearchbackgroundandtechnicalfeaturesofBaosteel’ssinteringfluegasdesulfurization(FGD).Itwasalsonamedswirl-jet-absorbingwetlimestone-gypsumsinteringFGDtechnology.Bymeansofindustrialonlinepilotplants,throughcontinuousrunningandorthogonaltests,theeffectsofvariousinfluencingfactorsonSO2removalefficiencyofBaosteelsinteringfluegasdesulgurization(BSFGD)werestudiedcarefully.TheresultsindicatethattheslurrypHvalue,temperature(T)andflowrate(Q)ofinletfluegas,liquidlevel(H)intheabsorberandfluegasjetvelocity(V)arethemaininfluencingfactors.Furthermore,whenpHisbetween5.0and5.5,Hisbetween4.2mand4.3m,Qis43000m3/h,Tisbelow65℃andVisbetween20m/sand28m/s,thebestdesulfurizationefficiencycanbeavailable.
简介:TheCOREXprocessisauniqueindustrializedsmeltingreductiontechnologyforiron-makingpresentlyintheworld.Oneofitsstrikingcharacteristicsisitsabilitytodirectlyutilizelumpcoalasitsmainfuel.Therefore,theCOREXprocessuseslittle,ornocokeatall.TherequirementsonlumpcoalfortheCOREXprocessweregiveninthispaper.Inordertoreducethecokeconsumptionandgiveplaytotheadvantagesofdirectlyusinglumpcoal,theappropriateratioofcoketolumpcoalneedstobedetermined.Thispaperalsosummerizedseveraladvancedmethodsofusingpowderedcoalgeneratedbythetransporting,loadingandunloadingoflumpcoal.InordertosolvethelackofcoaltypesforCOREXandobservethecrackinganddevolatilizationactionoflumpcoalinthemelter-gasifier,anexperimentaldeviceandanewmethodwereproposedtotestthecrackinganddevolatilizationcharacteristicsoflumpcoal.Bymeansofthenewmethod,thedevolatilizationandcrackingbehaviorsoflumpcoalcanbeinvestigated,whichishelpfultotheselectionoflumpcoalfortheCOREXprocess.
简介:介绍ER70S-6X焊丝钢的生产情况。通过化学成分及残余元素控制、精炼脱氧制度优化、连铸保护浇注和铸温铸速的稳定控制等工艺措施的实施,使EK70S-6X焊丝钢的产品质量和综合性能得到了稳定提升。