ENGLISH
La vitrine de diffusion des publications et contributions des chercheurs de l'ÉTS
RECHERCHER

Degradation mechanisms of magnesia-carbon refractories in radiation heat-affected wall of steel electric arc furnace

Kaveh, Kianoosh, Barati, Mansoor, Jahazi, Mohammad et Moosavi-Khoonsari, Elmira. 2025. « Degradation mechanisms of magnesia-carbon refractories in radiation heat-affected wall of steel electric arc furnace ». Ceramics International.
(Sous presse)

[thumbnail of Jahazi-M-2025-31484.pdf]
Prévisualisation
PDF
Jahazi-M-2025-31484.pdf - Version publiée
Licence d'utilisation : Creative Commons CC BY.

Télécharger (12MB) | Prévisualisation

Résumé

This study investigates the mechanisms underlying microstructural deterioration in processed MgO-C refractories from the radiation heat-affected wall of a steel EAF. X-ray tomography and scanning electron microscopy with energy-dispersive spectroscopy were employed to identify the thermally activated chemical, physical, and mechanical degradation phenomena and to evaluate their impact on microstructural evolution during the process. The results reveal that degradation is primarily driven by the development of a porous network surrounding coarse MgO grains (>∼3 mm), with a strong correlation observed between MgO grain size and damage evolution. Larger grains tend to promote more extensive porous networks, which in turn facilitate oxygen ingress and accelerate carbon oxidation. The pronounced mismatch in thermal expansion coefficients between MgO grains and the carbon matrix contributes to crack formation and grain detachment. These findings provide deeper insight into the failure mechanisms of MgO-C refractories and inform strategies for optimizing refractory design to extend service life and enhance performance.

Type de document: Article publié dans une revue, révisé par les pairs
Professeur:
Professeur
Jahazi, Mohammad
Moosavi-Khoonsari, Elmira
Affiliation: Génie mécanique, Génie mécanique
Date de dépôt: 21 août 2025 14:18
Dernière modification: 24 sept. 2025 22:19
URI: https://espace2.etsmtl.ca/id/eprint/31484

Actions (Authentification requise)

Dernière vérification avant le dépôt Dernière vérification avant le dépôt