Slag Line Dissolution of MgO Refractory

Authors

Y. Chen, McMaster University
Geoffrey A. Brooks, CSIRO Minerals
Sharon Nightingale, University of WollongongFollow

RIS ID

13452

Publication Details

Nightingale, S. A., Chen, Y. & Brooks, G. (2005). Slag Line Dissolution of MgO Refractory. Canadian Metallurgical Quarterly, 44 (3), 323-330.

Abstract

The high temperature dip technique has been used to investigate the corrosion of MgO refractory in SiO₂-CaO-FeOx-MgO slag and Al₂O3-SiO₂-CaO-FeOx-MgO slag at 1530 °C. In both systems, significant slag line corrosion was observed and this corresponded to increasing MgO in the slag. There was significant evidence that a solid spinel phase had attached to the surface of the sample in the case of slag containing 20 wt% alumina. This type of corrosion is due to surface tension induced flow patterns at the refractory slag interface and a semi-empirical model of that phenomenon described the observed progression of corrosion with time for direct dissolution well. However, the model did not work well when indirect dissolution occurred.