Characterization and post-mortem analysis of Al2O3-MgO-C refractories used in steelmaking ladle furnaces

Microstructure, oxidation resistance and corrosion behavior of three commercial Al2O3-MgO-C refractories (AMCR’s) used in working lining of steelmaking ladles are investigated. XRD, SEM/EDS techniques and rotary slag testing were employed to evaluate the microstructure and corrosion resistance of AM...

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Bibliographic Details
Published in:Engineering failure analysis 2020-10, Vol.116, p.104697, Article 104697
Main Authors: Tabatabaie-Hedeshi, S.M., Bavand-vandchali, M., Naghizadeh, R.
Format: Article
Language:English
Subjects:
Al2O3-MgO-C
Characterization
Post-mortem analysis
Refractories
Slag corrosion
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Summary:Microstructure, oxidation resistance and corrosion behavior of three commercial Al2O3-MgO-C refractories (AMCR’s) used in working lining of steelmaking ladles are investigated. XRD, SEM/EDS techniques and rotary slag testing were employed to evaluate the microstructure and corrosion resistance of AMCR’s samples. The obtained results showed, the phase composition and microstructure of the AMCR’s matrix were influences by the in-situ spinel formation due to reaction between alumina and magnesia fine grains and develop a ceramic bonding in the refractory body. Differences in the oxidation and corrosion resistance caused by the graphite content, antioxidant type, textural features and differences in refractory bricks composition. Optimum content of magnesia and its particle size distribution have vital role on in-situ spinel phase formation and effect on properties. In addition, reaction between the matrix and alumina aggregates with the liquid slag were considered to evaluate of AMCR’s corrosion behavior.
ISSN:1350-6307
1873-1961
DOI:10.1016/j.engfailanal.2020.104697