Reaction of periclase and corundum refractories with killed steel

Abstract

Recent years have seen a constant increase in the amount of steel poured through sliding gates, the principal component of which is perielase and corundum plates; this calls for an investigation of the resistance of these types of refractories to metals. Their reaction with highly oxidized melts was examined in a previous communication [1] showing that it is determined by the properties of the primary oxide phase of the melt (POP), consisting of iron and magnesium oxides.Melting of killed steel with minimal oxygen content involves the use of deoxidizer elements with a high affinity for oxygen; this significantly changes the composition of the POP and the character of its action on the refractory. To cover the range of typical POP compositions, and therefore the possible routes of the reaction of the refractory with steel, the investigations were performed on metal deoMdized with ferrosilicium (tacit A), ferrosilicium and ferromanganese with a ratio [Si] : [Mn] in the steel greater than 2 : 1 (B), ferrosilicium and ferromanganese with a ratio [Si]: [M_n] in the steel lessthan 1:2 (C), andferrosilicium, ferromanganese, and aluminum, the proportion by weight of the latter being up to 0.1% (D).