About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fundamentals of Sustainable Metallurgy and Processing of Materials
|
| Presentation Title |
Comparison of Hydrogen Reduction Kinetics of EAF Dust Key Constituents |
| Author(s) |
Made Giri Natha, Brian Monaghan, Geoffrey Brooks, Israel Murgas, M. Akbar Rhamdhani |
| On-Site Speaker (Planned) |
Made Giri Natha |
| Abstract Scope |
An increase in EAF (electric arc furnace) steelmaking as one of approaches for decarbonization will lead to an increase in EAF dust generation, a by-product rich in iron and zinc. Hydrogen-based reduction has emerged as a promising alternative process to replace traditional carbon-based processes. In this study, hydrogen reduction kinetics of three primary constituents of EAF dust, i.e. magnetite (Fe₃O₄), zinc oxide (ZnO), and zinc ferrite (ZnFe₂O₄), were compared. The results show that the reduction kinetics of ZnO are likely controlled by interfacial chemical reactions with zinc evaporating immediately. Meanwhile, the reductions of ZnFe₂O₄ and Fe₃O₄ are primarily controlled by diffusion. This diffusion mechanism produced distinct microstructural layers: Fe-metal product layer on the surface, an intermediate layer with reduced oxygen, and an inner core of unreduced material. These findings are significant for understanding the mechanisms of hydrogen reduction in complex EAF dust and for developing more sustainable processing methods. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Extraction and Processing, Sustainability, Recycling and Secondary Recovery |