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Meeting

2026 TMS Annual Meeting & Exhibition

Symposium

Computational Thermodynamics and Kinetics

Presentation Title

Thermodynamic Simulation of Direct Roasting of a-Spodumene in Air. (Systems LiAlSi2O6 :NaCl and LiAlSi2O6 : Na2CO3)

Author(s)

V. E. Torres-Ortega, F.R. Barrientos-Hernández, M. Pérez-Labra, J.A. Romero-Serrano, M. Reyes-Pérez, V. Acosta-Sánchez, A. Cruz Ramírez, J.C. Juárez-Tapia

On-Site Speaker (Planned)

V. E. Torres-Ortega

Abstract Scope

In this research work, the direct calcination reaction of spodumene (LiAlSi2O6) with NaCl and LiAlSi2O6 with Na2CO3 through thermodynamic simulation using the Fact Sage 8.2 software was studied. The molar ratios (RM) in both systems analyzed were: 1:0.5, 1:0.6, 1:0.7, 1:0.8, 1:9, and 1:1 in the temperature range 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 stable chemical species formed for the system LiAlSi2O6:NaCl in all RMs were: LiCL (17.33%), NaAlSiO4 and NaAlSi3O8. And the most stable chemical species formed for the system LiAlSi2O6:Na2CO3 were: Li2CO3 (18.23%), NaAlSiO4 and NaAlSi3O8. The results obtained from the present study allowed us to propose the reaction mechanism of the direct roasting process of a-spodumene with NaCl and a-spodumene with Na2CO3.

Proceedings Inclusion?

Planned:

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