Corrosion Mechanisms of Refractory Materials Used in Secondary Metallurgy

Franz Melcher1, Harald Harmuth2

1 Treibacher Industrie AG, BU Steel and Foundry Industry, Technical Customer Service, 9330 Althofen, Austria
2 University of Leoben, Dept. Mineral Resources and Petroleum, Engineering, Chair of Ceramics, 8700 Leoben, Austria

Revision

Volume 3, Issue 1, Pages 99 - 104

Abstract

In the present work dissolution mechanisms of refractory materials after contact with slags of the secondary metallurgy are discussed. Post mortem samples of the RH-degasser as well as samples from dynamic and static corrosion tests were investigated. There are many empirical observations existing, concerning the wear of refractory materials in the mentioned vessels but still, a fundamental scientific understanding of the ongoing corrosion processes is missing. This work provides important considerations concerning these wear mechanisms. The results enable an estimation of chemical dissolution in dependence of the steel grade and its corresponding slag. These fundamentals allow an extension of service life by influencing the prevalent process parameters and selecting suitable refractory materials. Moreover they provide impulses for the  development of new or improvement of already existing refractory materials.

Keywords

magnesia chromite bricks, alumina spinel castable, corrosion, ladle slag, RH degasser, ladle, thermochemical calculations, FactSage

References

Copyright

© 2010 Göller Verlag