Título
Thermal study of the hydrocalumite–katoite–calcite system
Autor(es)
Palabras clave
Hydrocalumite
Katoite
Calcite
Aluminum saline slag recovery
Microwaves aging
Thermal analyses
Clasificación UNESCO
Fecha de publicación
2022
Editor
Elsevier
Citación
Jiménez, A., Rives, V., & Vicente, M. A. (2022). Thermal study of the hydrocalumite–katoite–calcite system. Thermochimica Acta, 713, 179242. https://doi.org/10.1016/j.tca.2022.179242
Resumen
[EN] Hydrocalumite (Ca2Al(OH)6Cl⋅2H2O) samples were prepared by the coprecipitation method, using Al3+ obtained
from an aluminum slag, extracted in NaOH solutions and purified removing silica by precipitation with HCl.
Hydrocalumite aging was assisted by microwave irradiation, and carried out under different temperatures. Very
pure hydrocalumite was obtained under certain conditions, but samples impurified with katoite (Ca3Al2(OH)12)
and calcite (CaCO3) were obtained in other cases. The thermal decomposition of hydrocalumite is complex and is
not completely elucidated, compounds such as Ca12Al14O33 (mayenite), Ca(OH)Cl and CaO have been proposed.
The thermal characterization of this system was studied, also considering samples impurified with katoite and
calcite, as a valuable and rapid method for identifying these phases.
URI
ISSN
0040-6031
DOI
10.1016/j.tca.2022.179242
Versión del editor
Aparece en las colecciones
Patrocinador
Publicación en abierto financiada por la Universidad de Salamanca como participante en el Acuerdo Transformativo CRUE-CSIC con Elsevier, 2021-2024
