Slag-Metal- Refractory Interactions During Dissolution of Hydrogen-Based Directly Reduced Iron (H-DRI) in Liquid Iron Melt

Ammasi, A.; Rahul Karthik, P. M.; Vishal, D.

doi:10.1007/s40831-024-00802-9

J. Sustain. Metall.

2024

DOI: 10.1007/s40831-024-00802-9

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Slag-Metal- Refractory Interactions During Dissolution of Hydrogen-Based Directly Reduced Iron (H-DRI) in Liquid Iron Melt

A. Ammasi,

P. M. Rahul Karthik,

D. Vishal

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Cited by 2 publications

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Effect of Transient Reoxidation on Inclusions in Rare‐Earth‐Treated Bearing Steel

Wang,

Yan,

Xia

et al. 2024

steel research int.

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The impact of transient reoxidation environments on the chemical morphology evolution of nonmetallic oxide inclusions in rare‐earth‐treated bearing steel is investigated using FactSage thermodynamic simulation calculations, vacuum induction furnace experiments, and high‐temperature laser confocal microscopy experiments. Thermodynamic calculations indicate a direct correlation between the initial rare‐earth content and the oxygen required to transform Ce2O2S to CeAlO3 during secondary oxidation. Furthermore, a higher initial rare‐earth content leads to a more extensive and complete conversion to CeAlO3. Vacuum induction furnace experiments reveal that the inclusions transform from Ce2O2S to CeAlO3 and Al2O3 and eventually into composite oxide clusters. This results in a significant increase in inclusions, with near‐spherical Ce2O2S inclusions transforming into aggregated CeAlO3, leading to an increase in the average inclusion size from 2.4 to 4.2 μm. Laser confocal scanning microscopy experiments show that CeAlO3 exhibits a higher tendency to aggregate than Ce2O2S inclusions, the primary factor contributing to the observed increase in the average inclusion size after secondary oxidation. The results of this study provide theoretical guidance for mitigating the adverse effects of rare‐earth secondary oxidation on bearing steels, particularly in terms of inclusion control.

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Effect of Transient Reoxidation on Inclusions in Rare‐Earth‐Treated Bearing Steel

Wang,

Yan,

Xia

et al. 2024

steel research int.

View full text Add to dashboard Cite

show abstract

The Melting Behavior of Hydrogen Direct Reduced Iron in Molten Steel and Slag: An Integrated Computational and Experimental Study

Calderon Hurtado,

Govro,

Emdadi

et al. 2024

Metals

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Direct reduced iron (DRI) and hot briquetted iron (HBI) are essential feedstocks for tramp element control in the electric arc furnace (EAF). Due to greenhouse gas (GHG) concerns related to CO2 emissions, hydrogen as a substitute for natural gas and a reductant in DRI production is being widely explored to reduce GHG emissions in ironmaking. This study examines the melting behavior of hydrogen DRI (H-DRI) pellets in the EAF containing low-carbon (0.1 wt.%) molten steel and molten slag. A computational heat transfer model was developed to predict the melting behavior of H-DRI pellets. To validate the model, a set of experimental laboratory simulations was conducted by immersing H-DRI in a molten steel bath and slag. The temperature history at the center of the pellet during melting and the shell thickness at different melting stages were utilized to validate the model. The simulation results agree with the experimental measurements of steel balls and H-DRI in different metallic molten steel and slag baths.

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Slag-Metal- Refractory Interactions During Dissolution of Hydrogen-Based Directly Reduced Iron (H-DRI) in Liquid Iron Melt

Cited by 2 publications

References 19 publications

Effect of Transient Reoxidation on Inclusions in Rare‐Earth‐Treated Bearing Steel

Effect of Transient Reoxidation on Inclusions in Rare‐Earth‐Treated Bearing Steel

The Melting Behavior of Hydrogen Direct Reduced Iron in Molten Steel and Slag: An Integrated Computational and Experimental Study

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