Abstract
The influence of SiO2 on the interfacial reaction between MgAl2O4 substrate and molten iron has been
investigated as a basic research study for the wear of refractories. Substrates which were made from MgO, Al2O3 and SiO2 powders consisted of spinel and MgO-Al2O3-SiO2 amorphous. The iron sample was put on the substrate and interfacial reaction between molten iron and substrate was examined at 1833K for 1 or 3h. In the case using SiO2 free substrate, the FeO-MgO solid solution was formed at the iron-substrate interface and oxygen in molten iron transferred into spinel as FeO. In the case using substrate with SiO2 addition of 2.5 or 5.0 mass%, the FeO-MgO solid solution was not formed at the interface and FeO content of MgO-Al2O3-SiO2 amorphous was more than that of spinel.