简介：Throughphysicalmodelingandnumericalsimulation,theflowfieldinaslabcontinuouscastingmoldwithelectromagneticstirringismeasuredunderdifferentcastingparametersandstirringcurrents.Toqualitativelyevaluatetheflowfieldinthemold,twoindexes,i.e.,moldfluxentrapmentandvelocityuniformity,areproposed.Basedonthesetwoindexes,someoptimizedstirringparametersunderdifferentcastingconditionscanbedetermined.

简介：ThephysicalandchemicalpropertiesandsoundnessofBaosteelPowerPlant’sdrydesulphurizedflyashweresystematicallyinvestigatedandcomparedwiththoseofthesimilarbyproductsproducedbysomeotherdomesticpowerplants.Thefeasibilityofthesebyproductsusedasaconstructionmaterialwasalsoanalyzed.TheresultsshowthatBaosteel’sdrydesulphurizedflyashisakindofashwithhighcalciumandhighsulfurcontents,whichhasthecharacteristicsofvolcanicashactivity.Itcontainssulfateandsulfite,andiseasytocausesulfateactivation.Ithashigheractivitycomparedwithcommonflyash.Buthighercalciumsulfiteandfree-CaOcontentsinashwillbringaboutsoundnessconcernstousers.Therefore,qualitytestsandvolumecontrolwillbenecessarywhenflyashisusedasaconstructionmaterial.