About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Recycling and Environmental Technologies
|
| Presentation Title |
Phase Equilibrium and Thermodynamic Investigation of the Ce2O3-CaO-SiO2-5wt%MgO System at 1773 K |
| Author(s) |
Mengchuan Li, Rensheng Li, Xu Gao, Wanlin Wang |
| On-Site Speaker (Planned) |
Mengchuan Li |
| Abstract Scope |
The lack of reliable thermodynamic data for cerium-containing oxide systems has significantly hindered the efficient recovery and utilization of rare earth elements (REEs) from secondary resources. In this study, the phase equilibrium relationships in the Ce2O3-CaO-SiO2-5wt%MgO quaternary system at 1773 K were systematically investigated through high-temperature equilibration and quenching experiments, followed by comprehensive characterization using XRD, SEM-EDS and EPMA. The isothermal liquidus lines were precisely determined, and the stability regions of key phases, including SiO2, Ce2Si2O7, CaO·Ce2O3·2SiO2, and CaO·2Ce2O3·3SiO2, along with their coexistence relationships, were unambiguously identified. Furthermore, a more accurate isothermal section diagram model was established through comparative analysis between thermodynamic calculations and experimental data. This study not only fills a critical gap in the thermodynamic database of rare earth slag systems but also provides fundamental insights for optimizing rare earth metallurgical slag design and achieving sustainable recovery of cerium from industrial waste residues. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Extraction and Processing, Environmental Effects, Phase Transformations |