Evaluating the Relationship between Slabbing of Cr2O3/MgO Refractories Used in Steelmaking and Spalling of High Chrome Oxide Refractories Used in Gasification

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Because of its excellent corrosion resistance and high temperature properties, chrome oxide refractories have been used in a number of severe service environments, including steelmaking and gasification. Refractory failure of Cr2O3/MgO or MgO/Cr2O3 refractories in steelmaking can involve a phenomena called slabbing, peeling, or chemical spalling. A similar failure mechanism exists in the high chrome oxide materials used in gasification. Gasifiers contain the reaction between a carbon feedstock, water, and oxygen under reducing conditions; producing H2 and CO used in chemicals or as fuel for power plants. A slagging gasifier typically operates between 1250- 1575°C, and with pressures between 300-1000 ... continued below

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Bennett, J.P.; Thomas, H. & Kwong, K.-S. October 1, 2006.

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Because of its excellent corrosion resistance and high temperature properties, chrome oxide refractories have been used in a number of severe service environments, including steelmaking and gasification. Refractory failure of Cr2O3/MgO or MgO/Cr2O3 refractories in steelmaking can involve a phenomena called slabbing, peeling, or chemical spalling. A similar failure mechanism exists in the high chrome oxide materials used in gasification. Gasifiers contain the reaction between a carbon feedstock, water, and oxygen under reducing conditions; producing H2 and CO used in chemicals or as fuel for power plants. A slagging gasifier typically operates between 1250- 1575°C, and with pressures between 300-1000 psi. Gasification refractory failure is by chemical dissolution and/or by spalling. Spalling is caused by slag penetration of the porous refractory surface and by expansion differences between the penetrated/non-penetrated areas, and is exacerbated by thermal cycling. Similarities between slabbing of steelmaking refractories and spalling of gasification refractories will be discussed.

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Not published - PDF of slide presentation is attached

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  • Materials Science & Technology (MS&T06), Cincinnati OH, Oct. 15-19, 2006

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  • Report No.: DOE/NETL-IR-2007-220
  • Grant Number: None cited
  • Office of Scientific & Technical Information Report Number: 913313
  • Archival Resource Key: ark:/67531/metadc880935

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  • October 1, 2006

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  • Sept. 22, 2016, 2:13 a.m.

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  • Nov. 4, 2016, 1:50 p.m.

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Bennett, J.P.; Thomas, H. & Kwong, K.-S. Evaluating the Relationship between Slabbing of Cr2O3/MgO Refractories Used in Steelmaking and Spalling of High Chrome Oxide Refractories Used in Gasification, article, October 1, 2006; Pittsburgh, Pennsylvania. (digital.library.unt.edu/ark:/67531/metadc880935/: accessed August 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.