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Title: Chromia refractory brick with carbon treatment

The disclosure provides a refractory brick system comprising a chromia refractory brick for operation in the slagging environment of an air-cooled gasifier. The chromia refractory brick comprises a ceramically-bonded porous chromia refractory having a porosity greater than 9% and having carbon deposits residing within the pores. The brick may be further comprised of Al.sub.2O.sub.3. The air-cooled gasifier generates a liquefied slag in contact with the refractory brick and generally operates at temperatures between C. and C. and pressures between 300 psi to 1000 psi, with oxygen partial pressures generally between 10.sup.-4 and 10.sup.-10 atm. The refractory brick performs without substantial chromium carbide or chromium metal formation in the low oxygen partial pressure environment. The inclusion of carbon without chromium carbide formation provides for significant mitigation of slag penetration and significantly reduced refractory wear.
Issue Date:
OSTI Identifier:
U.S. Department of Energy NETL
Patent Number(s):
Application Number:
Resource Relation:
Patent File Date: 2014 Sep 11
Research Org:
National Energy Technology Lab. (NETL), Pittsburgh, PA, and Morgantown, WV (United States)
Sponsoring Org:
Country of Publication:
United States

Other works cited in this record:

Coke Bonded Basic Refractory
patent, April 1969

Process for producing refractories
patent, February 1977

Refractory linings
patent, December 1977

Aluminous refractory compositions containing carbon, silicon and chrome oxide
patent, July 1980

Refractory compositions with binder
patent, April 1982

Use of phosphates to reduce slag penetration in Cr2O3-based refractories
patent, November 2004

Refractory material with improved resistance to molten slag
patent, July 2013

Sintered product based on chromium oxide
patent, December 2013

Chromia-containing refractory
patent, February 2014

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