About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Towards a Future of Sustainable Production and Processing of Metals and Alloys
|
Presentation Title |
Iron Production by Molten Sulfide Electrolysis |
Author(s) |
Kimaya P. Suryarao, Gen Kamimura, Katrin Daehn, Antoine Allanore |
On-Site Speaker (Planned) |
Antoine Allanore |
Abstract Scope |
With incentives to cut CO2 emissions, alongside increasing demand for higher quality steel, there is a key need for technologies that use solely electricity for iron ore reduction. Herein, we propose electrolytic production of liquid cast iron using a novel sulfide route, molten sulfide electrolysis (MSE). The electrolytic decomposition of iron sulfide into iron and elemental sulfur gas operates in a molten sulfide electrolyte. The process operates using sulfide and sulfur chemistry, conditions well known from non-ferrous metallurgy where the exclusion of oxygen supports a virtual elimination of GHG emission from the reduction step. The underlying thermodynamics suggests the absence of trivalent iron species (Fe3+) in such conditions, supporting the reduction of only divalent iron (Fe2+) and reducing the energy needs for iron production by ~25% compared to other oxide-based routes. Experimental results for electrolysis are presented to verify such findings and discuss the key attributes of MSE for iron production. |
Proceedings Inclusion? |
Planned: |