About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fundamentals of Sustainable Metallurgy and Materials Science
|
| Presentation Title |
Nucleation and Growth in Iron Oxide Pellet Reduction
|
| Author(s) |
Ömer K. Büyükuslu, Lena Patterer, Fabrice Yang, Anna Laufens, Jean-Baptiste Letz, Anna L. Ravensburg, Hauke Springer, Dierk Raabe, Isnaldi F. Souza, Moritz To Baben |
| On-Site Speaker (Planned) |
Moritz To Baben |
| Abstract Scope |
Decarbonizing primary steelmaking requires predictive models that resolve the coupled effects of reaction kinetics, transport, and evolving pellet microstructure during hydrogen-based direct reduction. Existing pellet models often neglect nucleation and growth, use thermodynamically inconsistent formulations, or depend on extensive empirical fitting. Here, we present a one-dimensional micro-reaction model that captures nucleation and growth in industrial iron-ore pellets while coupling reaction kinetics, mass transport, and local porosity evolution. Thermodynamic consistency is enforced through integrated ChemApp calculations that predict phase equilibria and reduction driving forces under varying gas atmospheres, including gas-gas reactions and diffusion effects. By minimizing empirical parameters and extensive microstructure information, the framework improves extrapolative robustness and supports process optimization across pellet properties, kinetic parameters, and gas input streams, enabling better understanding of fundamental mechanisms in lower-carbon steel production. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Process Technology, Modeling and Simulation |