Kaveh, Kianoosh, Barati, Mansoor, Jahazi, Mohammad et Moosavi-Khoonsari, Elmira.
2026.
« Kinetics and mechanisms of corrosion in magnesia–carbon refractories by chromium-oxide-containing calcium aluminate slag ».
Ceramics International, vol. 52, nº 14, Part C.
26358–26371.
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Résumé
The effect of the Cr2O3 content of a synthetic CaO–Al2O3–SiO2–MgO base slag on MgO–C refractory corrosion was studied using controlled lab-scale experiments and thermodynamic modeling. A synthetic slag was designed to replicate a ladle furnace slag exhibiting high desulfurization capacity. The base slag was saturated with MgO to eliminate the thermodynamic driving force for MgO dissolution and to isolate the effect of Cr2O3 on slag penetration and refractory corrosion. Corrosion experiments were conducted at 1625 °C in a horizontal tube furnace in an Ar atmosphere, with slags containing 0, 5.0, and 10.0 wt% Cr2O3 for exposure times of 30, 60, and 90 min. Microstructural characterization using scanning electron microscopy coupled with energy dispersive spectroscopy revealed that increasing Cr2O3 content increased slag penetration depth and accelerated corrosion kinetics, primarily through the decarburization of Cr2O3 by reaction with the carbon matrix of the refractory and the dissolution of MgO. Effective penetration rate coefficients were determined for each slag composition, confirming the strong correlation between slag Cr2O3 content and refractory degradation. These findings provide mechanistic insights into the role of Cr2O3 in slag–refractory interactions and are directly relevant to stainless steelmaking and high-chromium alloy production, where Cr2O3-containing slags are prevalent and refractory performance is critical to process efficiency and lining life.
| Type de document: | Article publié dans une revue, révisé par les pairs |
|---|---|
| Chercheur(-euse): | Chercheur(-euse) Jahazi, Mohammad Moosavi-Khoonsari, Elmira |
| Affiliation: | Génie mécanique, Génie mécanique |
| Date de dépôt: | 03 juin 2026 18:19 |
| Dernière modification: | 12 juin 2026 20:29 |
| URI: | https://espace2.etsmtl.ca/id/eprint/33769 |
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