| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Pyrometallurgy: Furnace Containment
|
| Presentation Title |
Characterization of a Nickel Flash Smelter Refractory Material – The Effect of Thermal Gradient |
| Author(s) |
Juho Lehmusto, Saara Söyrinki, Juha Lagerbom, Tuomas Jokiaho, Zaiqing Que, Jorma Määttä, Leena Hupa, Elina Huttunen-Saarivirta, Mari Lindgren |
| On-Site Speaker (Planned) |
Juho Lehmusto |
| Abstract Scope |
Magnesia-chromite (MgCr2O4) spinel-based refractories are applied in copper and nickel flash smelting furnaces, where the refractories experience high temperatures but also thermal gradients due to the cooling of the walls. In the gas space, the refractories are subjected to an aggressive environment with high SO2 concentrations. Furthermore, the increased use of recycled material streams has introduced new reactive impurities, such as halides, to the process. Therefore, the interactions between the refractories and gaseous species as well as the related reaction mechanisms need to be understood. This study presents a comparison between ac-received and spent refractories from a nickel flash smelting furnace to identify the reactive species and shed more light on their reaction mechanisms. The thermal gradient over the refractory is expected to affect the microstructure and diffusion of elements within the structure. Therefore, special attention was paid to the role of the temperature gradient in the abovementioned interactions. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, High-Temperature Materials, Pyrometallurgy |