About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Aluminum Reduction Technology
|
| Presentation Title |
Aluminium Deposition in a NaCl-KCl-AlCl3 Melt Containing Calcium Oxide |
| Author(s) |
Pål Martin Benum, Espen Sandnes, Christian Rosenkilde |
| On-Site Speaker (Planned) |
Pål Martin Benum |
| Abstract Scope |
Aluminium deposition from AlCl3 and the effect of oxide concentration on the depostion was studied. Voltammetry was conducted at 715oC in equimolar NaCl-KCl, with and without AlCl3 present. AlCl3 was fed to the melt as NaAlCl4 to reduce losses from sublimation at feeding, ensuring precise AlCl3 contencentration. NaAlCl4 was prepared by fusing an equimolar mixture of NaCl and AlCl3, and titration analysis of melt samples indicated little loss of AlCl3. Oxides were added stepwise in the form of CaO, obatining a relatively wide range of oxide concentrations. The results show that the current for aluminium deposition decreases with increasing oxide content, eventually reaching similar currents to voltammograms recorded in a melt with no AlCl3 present. The potential for aluminium deposition also shifts cathodically with increasing oxide content. The reduction of the aluminium deposition current indicates the presence of a stable AlOClX(1-x) complex, and possibly the formation and precipitation of Al2O3. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Aluminum, Electrometallurgy, Sustainability |