About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fundamentals of Sustainable Metallurgy and Materials Science
|
| Presentation Title |
Solid-State Hydrogen Reduction of Stainless Steelmaking Flue Dusts: Phase Evolution in Multicomponent Spinel-Rich Systems |
| Author(s) |
Terence Lucero Menor, Jérémy Chaulet, Muxing Guo, Bart Blanpain |
| On-Site Speaker (Planned) |
Terence Lucero Menor |
| Abstract Scope |
Hydrogen reduction offers a sustainable route for recovering valuable metals from industrial residues, such as stainless steelmaking flue dusts. However, solid-state phase evolution in multicomponent systems is not fully captured by equilibrium thermodynamics due to compositional complexity and elemental redistribution. In this study, Fe–Ca–Cr–Mn–Ni–Cu-bearing flue dusts were reduced in 100% H₂ at 500–900 °C. Phase evolution was investigated using thermodynamic calculations, X-ray diffraction, and electron probe microanalysis. Microstructural characterization showed pronounced elemental partitioning, with Ni–Cu enriched Fe alloy in reduced regions and Cr–Mn–Fe-rich oxides in unreduced domains, persisting up to 900 °C. Preliminary leaching tests indicate enhanced recovery for Ni and Cu following hydrogen reduction treatment. These results provide insight into hydrogen reduction pathways in multicomponent spinel-rich systems and contribute to the development of metal recovery strategies from stainless steelmaking flue dusts. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Recycling and Secondary Recovery, Extraction and Processing, Phase Transformations |