简介:MetallizationdegreeofDRI(R_m)reduceswithrisingoxidizationdegreeofreductiongas(r_o)andoxidizationdegreeofreductiongasriseswithfallingmetallizationdegreeofDRI.ThisisaviciouscircleexistsinpresentoperationofC3000.Fuelconsumption(r_F)inCorexincreaseswithfallingR_manddecreaseswithrisingr_o.However,r_FobviouslyincreaseswiththeintegratedchangeofR_mandr_o.ToincreaseR_manddecreaser_F,ananalysisonenergyconsumptionanditsdistributionwasdeployedinthispaper.Accordingtotheresults,proposalwastabledbasedondecreasingcharbedheight.
简介:TakingtheseamlesstubeplantofBaoshanIron&SteelComplexinChinaasthebackground,weanalyzethecharactersofhotrollingseamlesssteeltube:multivarieties,lowvolume,complicatedproductionprocess,flexibleproductionroutes.Thenintegratedschedulingproblemforhotrollingseamlesssteeltubeproductionisstudied,whichcoverstwokeypoints;order-groupingproblemandsolutionmethodforflowshop/jobshopschedulingproblem.Onthebasisofthesetwoproblems,integratedschedulingdecisionsystemisdeveloped.Thedesignidea,functionflowsheet,dataprocessingmethod,andfunctionalmoduleofvisualizedhuman-computerinteractiveschedulingsystemimplementedinseamlesssteeltubeplantofShanghaiBaoshanIron&SteelComplexaredescribedintodetail.Comparedwithmanualsystem,theperformanceofsystemshowstheapplicabilityandsuperiorityinseveralcriteria.
简介:Theeffectsofthefinalelectromagneticstirring(EMS)onthesolidificationstructureof60Si2CrVAThighstrengthspring(HSS)steelofcontinuouscasting(CC)billetshasbeenstudied.Theanalysisofthesolidificationstructureisbasedonthecomparisonbetweenthemacrostructure,microstructure,carbonsegregationanddefectsofthe60Si2CrVATbilletwithmold-electromagneticstirring(M-EMS)andthosewiththeM+finalsolidificationzoneelectromagneticstirring(F-EMS).ItisfoundthatthesolidificationstructureofthebilletwiththeF-EMSisimprovedwiththetightnessofthebilletandtheincreaseintheratiooftheequiaxedstructure,theinnerporosityandtheshrinkageareremarkablyreduced,andthattheratioofcentralcarbonsegregationsharplydecreases.Meanwhile,thesecondarydendritearmspacing(SDAS)isimproved,andtheratioofcentralequiaxedgrainconsiderablyincreases,whichresultsinfinergrains.Therefore,thequalityofthebilletisenhancedwiththeF-EMS.