Cinética de la disolución de ulexita calcinada en soluciones de sulfato de amonio

Nizamettin Demirkıran; Mehmet Kayra Tanaydin; G. Deniz Turhan Özdemir

doi:10.3989/revmetalm.112

Autores/as

Nizamettin Demirkıran Department of Chemical Engineering, Faculty of Engineering, Inönü University https://orcid.org/0000-0001-9021-2477
Mehmet Kayra Tanaydin Department of Chemical Engineering, Faculty of Engineering, Tunceli University https://orcid.org/0000-0003-1696-0754
G. Deniz Turhan Özdemir Department of Chemical Engineering, Faculty of Engineering, Inönü University https://orcid.org/0000-0003-4749-1989

DOI:

https://doi.org/10.3989/revmetalm.112

Palabras clave:

Cinética de disolución, Deshidración, Sulfato de amonio, Ulexite

Resumen

La ulexita es uno de los minerales de boro, que incluye una cantidad considerable de agua de hidratación. Se puede usar como materia prima en la producción de compuestos de boro. Una parte del agua existente en la composición química de la ulexita puede eliminarse de la matriz sólida aplicando tratamiento de deshidratación que permite obtener una estructura porosa, que aumenta la velocidad de reacción. En el presente trabajo, se estudió el efecto de la temperatura de deshidratación sobre la cinética de disolución de ulexita en soluciones de sulfato de amonio, en un reactor discontinuo estudiando los parámetros de concentración de solución, relación sólido/líquido, velocidad de agitación y la temperatura de reacción. Se determinó que la velocidad de disolución del material calcinado aumentaba al aumentar la concentración de la solución y la temperatura de reacción y con la disminución de la relación de sólido/líquido. La velocidad de disolución más alta se alcanzó con la muestra calcinada a 150 °C. Se encontró que la velocidad de disolución se ajusta al modelo pseudohomogéneo de primer orden. La energía de activación del proceso de disolución se estimó en 42 kJ·mol^-1.

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Citas

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