| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Pyrometallurgy: Developing Low Carbon Pathways
|
| Presentation Title |
CO2 Free FeMn/Mn Production through Molten Oxide Electrolysis |
| Author(s) |
Karen Sende Osen, Halvor Dalaker, Ana Maria Martinez, Henrik Gudbrandsen, Ida Kero, Zhaohiu Wang |
| On-Site Speaker (Planned) |
Halvor Dalaker |
| Abstract Scope |
Ferromanganese production by carbothermic reduction in Submerged Arc Furnaces (SAF) is a productive and efficient process with energy consumption around 2.4 kWh/kg Mn, however, in the reduction step 1-1.6 kg CO<sub>2</sub>/kg Mn is generated. Molten Oxide Electrolysis (MOE) has been put forward as a possible CO<sub>2</sub>-free break-through technology to alleviate the environmental impact of steel and ferroalloy production. Electrons are the reducing agent, and with an oxygen evolving anode, the chemical energy in the carbon will be completely replaced with electrical energy. In the current work, Mn was reduced by electrolysis in a molten oxide electrolyte (MnO-SiO<sub>2</sub>-Al<sub>2</sub>O<sub>3</sub>-CaO) on various cathode materials, using a commercial alloy as inert oxygen evolving anode. The paper also includes theoretical mass and energy balances for an envisioned industrial MOE Mn process, comparing two different cases of Mn ore pretreatment (pre-reduced only and pre-reduced and purified). |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Electrometallurgy, Sustainability, |