Chemical degradation of magnesia–carbon refractories by different gaseous atmospheres

Moliné, Marcos N.; Galliano, Pablo G.; Tomba Martinez, Analía G.

doi:10.1016/j.cartre.2024.100320

Carbon Trends

2024

DOI: 10.1016/j.cartre.2024.100320

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Chemical degradation of magnesia–carbon refractories by different gaseous atmospheres

Marcos N. Moliné,

Pablo G. Galliano,

Analía G. Tomba Martinez

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2024

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Cited by 2 publications

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Corrosion of MgO–C Refractory with Ladle Slags

Wei,

Yehorov,

Volkova

2024

steel research int.

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Herein, MgO–C refractory brick is immersed into the molten ladle slags with various CaO/Al2O3 ratios (located in the range of 0.56–0.78 and 1.99–1.36) and SiO2 addition from 1 to 20 wt%, at two temperatures of 1550 and 1650 °C. After the interaction with the slag with a CaO/Al2O3 ratio range of 0.56–0.78, the MgAl2O4 phase with various sizes is found to form in the solidified slag layer adhering to the MgO–C sample surface, and a layer consisting of MgAl2O4 on the interface of MgO–C brick is observed. For the slag with the CaO/Al2O3 ratio range of 1.99–1.36, a small amount of minor size of MgAl2O4 particle is detected only with 20 wt% of SiO2 addition. Instead of a formation of the MgAl2O4 layer, the Fe phase containing Mn, metallic Ti, and Si is scattered on the side of the solidified slag layer. The corrosion is more pronounced in the slag with a high CaO/Al2O3 ratio and is enhanced via the addition of SiO2 along with the increased solubility of MgO. The increased solubility of MgO in the slag with increasing SiO2 has also been predicted via FactSage.

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Corrosion of MgO–C Refractory with Ladle Slags

Wei,

Yehorov,

Volkova

2024

steel research int.

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A Novel Methodology to Quantify the Slag Protective Effect on the Oxidation Behavior of Oxide‐C Refractories

Moliné,

Galliano,

Tomba Martinez

2024

steel research int.

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Preventing the oxidation of oxide‐C refractories used as working linings in steelmaking vessels is crucial for maintaining their performance and extending their lifetime. This study introduces a novel methodology for evaluating and quantifying the protective effect that adhered slag can have on the oxidation of the refractory lining of steelmaking ladles. The article details the ad‐hoc methodology itself, including the technique for adhering the slag to the refractory sample and the specifically developed equipment used. The proposed experimental approach includes the evaluation of how the environmental degradation of the slag layer affects the protection it provides to the refractory against attack by environmental oxygen. Finally, the methodology's ability to provide reliable and reproducible results is shown by its application on MgO–C refractories, the most widely used type of oxide‐C products in the steelmaking industry.

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Chemical degradation of magnesia–carbon refractories by different gaseous atmospheres

Cited by 2 publications

References 35 publications

Corrosion of MgO–C Refractory with Ladle Slags

Corrosion of MgO–C Refractory with Ladle Slags

A Novel Methodology to Quantify the Slag Protective Effect on the Oxidation Behavior of Oxide‐C Refractories

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