About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fundamentals of Sustainable Metallurgy and Processing of Materials
|
| Presentation Title |
Electrowinning of Mn and FeMn with a Molten Oxide Electrolysis Process |
| Author(s) |
Goril Jahrsengene, Marthe Nybrodahl, Zhaohui Wang, Hĺkon Ulvik, Braulio Beltrán-Pitarch, Henrik Gudbrandsen, Karen Sende Osen |
| On-Site Speaker (Planned) |
Goril Jahrsengene |
| Abstract Scope |
Electrolytic production of Mn-alloys is the most direct way to electrify and decarbonize the Mn production process, by removing all direct emissions of CO2. In this work, a molten oxide electrolysis (MOE) process run at 1250-1400 °C with an oxygen evolving anode was investigated as an alternative CO2-free production process of liquid Mn or FeMn from Mn ores. A laboratory setup and model system with an electrolyte containing synthetic MnO, Al2O3, SiO2, MgO, and CaO was used with an in-house produced CrFe-metal alloy anode. Both a consumable Fe-cathode and a non-consumable W electrode with cathodic current density of 2 A/cm2 gave stable operation and a cell voltage around 4-6 V. Producing an alloy with Fe appear to stabilize the produced Mn, as Mn was reacting also in the gas phase above the melt surface when using the W cathode in a vertical setup. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Sustainability, Electrometallurgy, |