About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Pyrometallurgy: Developing Low Carbon Pathways
|
Presentation Title |
Hydrogen Plasma Reduction of Metal Oxides |
Author(s) |
Halvor Dalaker, Even Wilberg Hovig |
On-Site Speaker (Planned) |
Halvor Dalaker |
Abstract Scope |
Hydrogen is a candidate to replace carbon in metal production, as it can reduce some metal ores (e.g. iron ore);
FeO<sub>x</sub> + XH<sub>2(g)</sub> = Fe + XH<sub>2</sub>O<sub>(g)</sub> .
However, many oxides cannot be converted to metals using molecular hydrogen. Higher order manganese oxides can, for example, be reduced to MnO, but not metallic Mn. For other oxides, like those of chromium, metallisation is possible, but extent of reaction limited.
The use of hydrogen plasma can improve hydrogen reduction for all these classes of oxides: The kinetics and efficiency of iron oxide reduction can be improved significantly; the theoretical limit of metallisation of chromium can be increased, and complete conversion of manganese oxide past MnO to metallic Mn becomes thermodynamically favourable:
MnO + 2H = Mn + H<sub>2</sub>O<sub>(g)</sub>
Here we present lab scale experiments demonstrating the production of iron, chromium and manganese from reactions between hydrogen plasma and metal oxides. |
Proceedings Inclusion? |
Planned: |
Keywords |
Pyrometallurgy, Sustainability, Iron and Steel |