ThecombinationofSiCandandalusitewithcalciumaluminatebinderforcastablesinhighcorrosivegasifyingenvironmentsisapromisingalternativerefractorysystemformanydifferentslagsystems.Aftersintering,aglassyprotectivelayerhasbeenidentified.Besidetheinteractionsoftherefractorieswithintermediateslagalsothethermomechanicalproperties,thethermalshockperformanceandthemicrostructurehavebeenevaluatedasafunctionofdifferentbindersystems.