About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Advances in Ferrous Process Metallurgy
|
| Presentation Title |
Nanotomographic Characterization of Iron Pellets |
| Author(s) |
Samuel Pennell, Vivek Kashyap, Robert Bell, Kerry Rippy |
| On-Site Speaker (Planned) |
Samuel Pennell |
| Abstract Scope |
Nanotomography is used to characterize morphological changes in iron pellets at different reduction conditions: as received ore pellets, partially reduced pellets, and fully reduced pellets . Characterizing pellet microstructure is crucial to understanding and controlling the reduction conditions and final properties of iron pellets. Here, we report nanotomography results on both laboratory and industrially reduced iron ore pellets. Nanotomography reveals highly interconnected pore networks at all stages, with increasing tortuosity at higher degrees of reduction. The average pore size is shown to decrease as reduction proceeds, due to the formation of new pores. Industrially reduced pellets on average show a larger pore size compared to laboratory reduced pellets, which is attributed to longer sintering times in industrial conditions. These microstructural observations help us understand both the evolution of pores and solids during reduction, and the microstructural cause of macro-scale differences between industrially-reduced and laboratory-reduced pellets. |