武钢4号高炉炉缸炉底侵蚀在线监测系统的开发与应用

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1、AbstractBlastfurnaceswithlongevity,highefficiencyandlowcostarealwayspursuedbysteelcompanies.Withtheupsizingandincrementofproductionintensity,moreandmoreattentionsarepaidtotheservicelifeofblastfurnace.Therefractoryerosionsofhearthandbottomrestrictthelongevityofblastf

2、urnace,andaccidentscausedbyburnoutofhearthoccurredoccasionally.Therefore,itisofpracticalsignificancetodevelopasoftwaretomonitorthehearthandbottomerosionsofblastfurnaceinrealtime.Tomeettheactualneedofburstfurnaceoperators,thispaperhassuccessfullydevelopedtheon-linemo

3、nitoringsoftwaresystemforthehearthbottomcorrosionofblastfurnace,basedonnumericalheattransferandcomputergraphicsdisplaytechnology.Thesoftwaresystemconsistofdatacommunication,dataacquisitionofthermocoupletemperature,on-linecomputationofhearthandbottomcorrosion,andgrap

4、hicdisplay,etc.Itcancalculatethetemperaturedistributionofhearthandbottomwiththemeasuredtemperaturesofthermocouples,andthuspredictthecorrosionofhearthandbottom.Themaininnovationsarelistedasbelow:(1)Thenon-linearrelationshipbetweenthethermalconductivityofrefractoryand

5、temperaturehasbeentakenintoaccountinthemodelcalculation.ThefunctionsareobtainedbythemethodsofLagrange'sinterpolation.(2)Thefinitedifferencemethodisusedfornumericalsolutionoftemperaturefield,andtheharmonicformulaisadoptedforthethermalconductivityattheinterfaceofadjac

6、entcomputationalcells,whichsignificantlyreducetheprogrammingworkload.(3)Thebadandsingularpointsinthemeasuredtemperaturesfromblastfurnacethermocouplesarepreprocessedwiththemethodofalgorithmcombinedwithmanualcorrectionbeforethemodelcalculation,andthetemperatureinputsf

7、ornumericalerosion-predictionmodelissecuredtobecorrectandcomplete.(4)Theisothermalcurveof1150℃istheimportantindicatorfortheerosionsituationofhearthandbottom.Therealerosioncurveisapproachedbycontrastingthecalculatedtemperatureswithmeasuredcounterpartsanddynamicallyve

8、rticallyorhorizontallyadjustingcorrespondingcontrolpointsoftheerosioncurve.(5)Thegraphicdisplayofthetemperaturedistributioninthehearthandb