Slag corrosion of alumina-magnesia-carbon refractory bricks by different approaches

Abstract

Laboratory static and dynamic tests are currently used to evaluate the corrosion resistance of refractory materials used in steelmaking vessel linings. Nevertheless, there are not many available studies aimed at comparing the influence of different experimental testing conditions in the corrosion process. In this study, a detailed comparison is made between a static and a dynamic slag-corrosion test of an AMC refractory material performed at 1600 °C and also between the results obtained from each test. Differences in the wear and the distribution of new solid phases in the corroded material were identified; a more controlled slag/refractory contact was attained in the static test, while oxidation and erosion resistance were determining material characteristics in the dipping test. The results obtained in a previous post-mortem study of the same type of brick were analyzed in light of those reported in this paper, thus improving our understanding of the in-service wear of AMC refractories.