简介：Whenliquidsteelslagproducedfromsteelmakingprocesswastreatedintothepost-coldslagbyconventionalmethods,thegreatdealofslagheatwasdissipatedintotheenvironment,causingalotofenergywasteandenvironmentalpollution.Inthisstudy,anovelapproachofdirectutilizationofhotsteelslagasarawmaterialandslagheatfortheproductionofglass-ceramicswasproposedandexperimentallytested.Inordertosimulateliquidslagfromsteelmakingelectricfurnace,40%water-quenchedslagwasremeltedat1450℃andthenmixedwith60%meltingadditives（silicapowder,aluminapowderandsodiumoxide,etc.）andsubsequentlymeltedtogetherat1500℃for1hintomodifiedliquidslagwhichwascast,heat-treated,annealedandtransformedintoglass-ceramics.Theheat-treatedglasssampleswereinvestigatedusingdifferentialthermalanalysis（DTA）,X-raydiffraction（XRD）,andscanningelectronmicroscopy（SEM）.Theresultsshowthatdominantcrystallinephaseisdiopside[CaFe（SiO3）2]andtheshapeofthecrystalislikethegranule,diameterisabout0.2-0.6μm.Aglass-ceramicwithnucleationtemperatureof695℃fortwohoursandcrystallizationtemperatureof893℃foronehourand1163℃forhalf-hourexhibitedthebestcombinationofproperties.Thismethodofslagmixedwithmeltingadditivestoadjustthecompositionoftheparentglassisimportantfortheindustrialproductionofglass-ceramicsbydirectutilizationofhotsteelslag.

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