About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Magnesium Technology 2026
|
| Presentation Title |
Investigation of molten salt electrolysis of ferronickel slag for producing Mg metal |
| Author(s) |
Hyeong-Jun Jeoung, Jungshin Kang |
| On-Site Speaker (Planned) |
Hyeong-Jun Jeoung |
| Abstract Scope |
For the efficient production of Mg metal from ferronickel slag via molten salt electrolysis, the solubility and electrochemical behavior of Mg<sub>2</sub>SiO<sub>4</sub> in MgF<sub>2</sub> – LiF molten salt at 1053 K were investigated. The experimental results indicated that the solubility of Mg<sub>2</sub>SiO<sub>4</sub> saturated at approximately 0.26 mass% after 5 h. Cyclic voltammetry measurements, conducted using C working electrode, Pt quasi-reference electrode, and C counter electrode, revealed the preferential electro-reduction of silicate ions over that of Mg<sup>2+</sup>, and Si metal was produced when − 1.35 V (vs. Pt quasi-ref.) was applied for 0.5 h. Moreover, when electrolysis was conducted at 1053 K using C cathode and C anode under − 1.62 V for 14 h, MgO was identified along with Si metal. These results demonstrate that the efficient production of Mg metal from Mg<sub>2</sub>SiO<sub>4</sub> is feasible through the selective electro-reduction of silicate ions, followed by electrolysis of the resulting MgO. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnesium, Electrometallurgy, Extraction and Processing |