On a Mechanism of Wear of the Periclase-Carbon Lining for Oxygen Converters

On a Mechanism of Wear of the Periclase-Carbon Lining for Oxygen Converters Effects associated with the capillary impregnation of the refractory materials with melted slag, the chemical interaction of graphite carbon with slag, and the dissolution of periclase in slag are considered. The time needed for melted slag to penetrate to the hot-layer depth of the refractory lining is a matter of several seconds. The carbon component on its contact with melted slag is reduced with FeO to yield CO. The partial pressure of carbon monoxide p CO is calculated as a function of temperature (1500 – 1700°C) and FeO activity (0.1 – 0.5) in melted slag. The pressure p CO is shown to exceed the capillary pressure of melted slag in pores, which prevents the easy penetration (because of the CO bubbles formed) of the slag into the periclase-carbon lining. The lining-wear effects due to the MgO concentration in the slag and to the size of periclase crystals are considered. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Refractories and Industrial Ceramics Springer Journals

On a Mechanism of Wear of the Periclase-Carbon Lining for Oxygen Converters

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Publisher
Kluwer Academic Publishers-Plenum Publishers
Copyright
Copyright © 2002 by Plenum Publishing Corporation
Subject
Materials Science; Characterization and Evaluation of Materials; Materials Science, general; Ceramics, Glass, Composites, Natural Materials
ISSN
1083-4877
eISSN
1573-9139
D.O.I.
10.1023/A:1015843212383
Publisher site
See Article on Publisher Site

Abstract

Effects associated with the capillary impregnation of the refractory materials with melted slag, the chemical interaction of graphite carbon with slag, and the dissolution of periclase in slag are considered. The time needed for melted slag to penetrate to the hot-layer depth of the refractory lining is a matter of several seconds. The carbon component on its contact with melted slag is reduced with FeO to yield CO. The partial pressure of carbon monoxide p CO is calculated as a function of temperature (1500 – 1700°C) and FeO activity (0.1 – 0.5) in melted slag. The pressure p CO is shown to exceed the capillary pressure of melted slag in pores, which prevents the easy penetration (because of the CO bubbles formed) of the slag into the periclase-carbon lining. The lining-wear effects due to the MgO concentration in the slag and to the size of periclase crystals are considered.

Journal

Refractories and Industrial CeramicsSpringer Journals

Published: Oct 13, 2004

References

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