Oxidation and Reduction Processes in Slags During Continuous Casting of Stainless Steel

摘要

Oxidation and reduction reactions and processes in the liquid slag layer during the industrial continuous casting of stainless steel were experimentally investigated. In slags formed from casting powder with CaO/SiO_2 ≈ 1, oxidizing conditions exist for some elements in the metal phase at the interface between slag and liquid steel; simultaneously, reducing conditions also exist at the interface between slag and sintered layer and in the bulk of the slag layer. A considerable amount of metallic particles was found in the quenched slag samples, originating from the oxidization of Cr from the metal phase and its reduction as well as the reduction of FeO as the compound in the casting powder. These particles can influence the solidification behavior of casting slag.