Effect of a lining on the degree of oxidation of a metallic melt

The interaction of periclase and alundum refractories with iron-based melts of various degrees of oxidation is studied under laboratory conditions. It is shown that a lining can accumulate iron oxide inclusions as a result of its interaction with an oxide metal, significantly increasing its oxidizing potential. The contact of such a lining with a metal with a low degree of oxidation (metal deoxidized by aluminum) is accompanied by the opposite transition of FeO from the lining to the metal, which causes its secondary oxidation. This secondary oxidation mechanism can be critical for the production of a high-quality high-reliability structural steel, especially at a large specific lining surface area.