| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Minerals, Metals and Materials 2025: In-Situ Characterization Techniques
|
| Presentation Title |
Thermodynamic Analysis of Preparation of LiF Obtained by Direct Roasting of α-Spodumene With NaF |
| Author(s) |
M. Pérez-Labra, A. Hernandez-Ramirez, J.A. Romero-Serrano, M. U. Flores-Guerrero , F. Patiño-Cardona, M. Reyes-Pérez , A. Cruz-Ramírez, F. R. Barrientos-Hernández, J.C. Juárez Tapia |
| On-Site Speaker (Planned) |
M. Pérez-Labra |
| Abstract Scope |
In this research work, the direct roasting reaction of pure spodumene (LiAlSi2O6) with NaF through thermodynamic simulation using the Equilib module included in the Fact Sage 8.2 software was studied. The LiAlSi2O6:NaF molar ratios (RM) analyzed were: 1:0.5, 1:0.6, 1:0.7, 1:0.8, 1:0.85, 1:1, and 1:2.0 in the temperature interval from 50°C to 1200°C and 1 atmosphere of pressure determining the chemical species in equilibrium every 50 °C through Gibbs energy minimization. The most thermodynamically stable chemical species formed in all RMs were: LiF, NaAlSi3O8, and NaAlSiO4.The maximum percentage yield (PY) for the LiF specie was 99 % in the solid state starting at 250°C and in the liquid state at temperature ≥ 850°C for the 1:1 RM with an excess of NaF of 0.0008 %. The results obtained demonstrated that direct roasting of -spodumene using NaF is thermodynamically favored in the temperature range studied which was confirmed by the formation of lithium fluoride in solid or liquid phase and allowed to propose the reaction mechanism. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Modeling and Simulation, Phase Transformations |