Kinetic Modeling of the Alkaline Decomposition and Cyanidation of Argentojarosite
DOI:
https://doi.org/10.29356/jmcs.v54i4.909Keywords:
Argentojarosite; alkaline decomposition; kinetics; model; induction period; reaction order; activation energy.Abstract
The jarosite sample used is an argentojarosite-hydroniumjarosite solid solution of approximate formula (Ag0.78H3O0.22) Fe3(SO4)2 (OH)6. The decomposition process in NaOH/Ca(OH)2 media and the cyanidation process in Ca(OH)2 media were studied for the induction period and progressive conversion period respectively, and the reaction order and activation energy were determined for each case. The results are consistent with the spherical particle shrinking core model and chemical control under the experimental conditions imposed; six partial models and three global models have been tested for both processes in their basic behaviour.
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References
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3. Amorós, J. L.; Lunar, R.; Tavira, P. Miner. Deposita 1981, 16, 205-213.
4. Dutrizac, J. E.; Jambor, J. L. Applied Mineralogy, Park, W. C.; Hausen, D. M.; Hagni, R. D. Eds., AIME, Warrendale, P. A., 1984, 507-530.
5. Schempp, C. A. Am. J. Sci. 1923, 6, 73-74.
6. Arregi, Y.; Gordon, A. R.; Steintvelt, S. The Jarosite Processpast, Present and Future. Cigan, J. M.; Mackey, T. S.; O’Keefe, T. J., Eds., TMS-AIME, New York, 1979, 97-123.
7. Salinas, E.; Roca, A.; Cruells, M.; Patiño, F. Hydrometallurgy 2001, 60, 237-246.
8. Patiño, F. Tesis de doctorado: Cinética de la cianuración de argentojarosita y sus soluciones sólidas con plumbojarosita, Universitat de Barcelona, Facultat de Química, España, 1991.
9. Roca, A.; Patiño, F.; Viñals, J.; Núñez, C. Hydrometallurgy 1993, 33, 341-358.
10. Cruells, M.; Roca, A.; Patiño, F.; Salinas, E.; Rivera, I. Hydrometallurgy 2000, 55, 153-163.
11. Patiño, F.; Cruells, M.; Roca, A.; Salinas, E.; Pérez, M. Hydrometallurgy 2003, 70, 153-162.
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13. Roca, A.; Cruells, M.; Patiño, F.; Rivera, I.; Plata, M. Hydrometallurgy 2006, 81, 15-23.
14. Ballester, A.; Verdeja, L. F.; Sancho, J., Metalurgia Extractiva, Vol. 1 Fundamentos, Editorial Síntesis, Madrid, 2000, 182-189.
15. Sohn, H. Y.; Wadsworth, M. E., Cinética de los Procesos de la Metalurgia Extractiva, Ed. Trillas, México, 1986, 167-194.
16. Levenspiel, O., Ingeniería de las Reacciones Químicas, Editorial Reverté, Barcelona, España, 1979.
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2019-06-05
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