MgO-SiO2-H2O based Al2O3-MgO castables have been prepared with 86% Al2O3 homogenized bauxite and 88% Al2O3 down-draft kiln bauxite as aggregates,respectively.The slag resistance of the castable specimens was investigated by a dynamic testing method via an induction furnace,and the results were studied by SEM,EDS and FactSage 6.2 thermodynamic modeling. The results show that the slag penetration resistance of castable with 88% Al2O3 down-draft kiln bauxite is a little better than the castable with 86% Al2O3 homogenized bauxite,and there is not much difference on slag resistance between the two castables;Cracks were formed at the aggregate-matrix interface near the hot face after the corrosion test,which adversely affects the slag resistance of the sample; After the above two castables respectively reacted with the slag,corundum,composite spinel,CA6,C2AS and CAS2 were coexsited.

"> Al2O3-MgO castables, Bauxite, Corrosion, Penetration, Slag