Chapter 26. Corrosion of Ceramic Refractories in Synthetic Coal Slags Determined by the Rotating-Cylinder Technique

  1. William Smothers
  1. Sherman Greenberg and
  2. Roger B. Poeppel

Published Online: 28 MAR 2008

DOI: 10.1002/9780470320310.ch26

Applications of Refractories: Ceramic Engineering and Science Proceedings, Volume 7, Issue 1/2

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

Author Information

  1. Materials Science and Technology Div. Argonne National Lab, Argonne, IL 60439

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1986

ISBN Information

Print ISBN: 9780470374443

Online ISBN: 9780470320310

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Keywords:

  • corrosion;
  • magnesia;
  • MgO;
  • FeO;
  • corrosion behavior

Summary

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.