Chapter 26. Corrosion of Ceramic Refractories in Synthetic Coal Slags Determined by the Rotating-Cylinder Technique
- William Smothers
Published Online: 28 MAR 2008
Copyright © 1986 The American Ceramic Society, Inc.
Applications of Refractories: Ceramic Engineering and Science Proceedings, Volume 7, Issue 1/2
How to Cite
Greenberg, S. and Poeppel, R. B. (2008) Corrosion of Ceramic Refractories in Synthetic Coal Slags Determined by the Rotating-Cylinder Technique, in Applications of Refractories: Ceramic Engineering and Science Proceedings, Volume 7, Issue 1/2 (ed W. Smothers), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470320310.ch26
- Published Online: 28 MAR 2008
- Published Print: 1 JAN 1986
Print ISBN: 9780470374443
Online ISBN: 9780470320310
- corrosion behavior
Of the refractories tested to date, those containing over 75% Cr2O3 are the most resistant to corrosion by coal slag at temperatures up to 1600°C. Free magnesia is deleterious to performance; other factors, e.g., aggregate size and bonding, are also important. The deleterious effect o f- magnesia is so great that some medium-chromia refractories (50–60% Cr2O3) can be superior in performance to refractories containing high percentages of Cr2O3 along with some free magnesia. Porosity and iron concentration, per se, are not deleterious to corrosion performance. Corrosion rate increases rapidly with an increase in temperature and slag flow rate, but slag viscosity is not a primary variable. The MgO/FeO ratio of the slag may be of importance in determining corrosion behavior and, if so, the control of this ratio may provide a practical method of corrosion inhibition. Laboratory corrosion data agree gualitatively with the limited available plant experience.