Influences of Binders on Properties of High- alumina Repairing Mix for Medium-frequency Induction Furnace

(整期优先)网络出版时间:2013-02-12
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Threekindsofhigh-aluminarepairingmixesformedium-frequencyinductionfurnacewerepreparedbyrammingmethodwithsodiumsilicate.phosphoricacidandaluminiumdihydrogenphosphateasbinder.respectively.Physicalpropertiesofthespecimensheattreatedatdifferenttemperaturesweretestedandcompared.Theresultsshowthatthespecimenbondedbysodiumsilicatebehavesmuchhigherstrengthafterfiredat1600℃comparedwiththespecimenbondedbyphosphoricacidoraluminiumdihydrogenphosphate.Duetomoreliquidphaseformation,thepropertiesofspecimenbondedbysodiumsilicatearepoorwithalowstrengthandalargevolumeshrinkageathightemperatures.Meanwhile,thespecimensbondedbyphosphoricacidandaluminiumdihydrogenphosphate,respectively.showrelativelyhighstrengthsandslightvolumeexpansionsathightemperaturesbecauseofin-situmulliteformation.