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Kinetic Modeling of the Alkaline Decomposition and Cyanidation of Argentojarosite

Francisco Patiño, Antonio Roca, Montserrat Cruells, Isauro Rivera, Leticia Esperanza Hernández
2019 Journal of the Mexican Chemical Society  
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
more » ... control under the experimental conditions imposed; six partial models and three global models have been tested for both processes in their basic behaviour.
doi:10.29356/jmcs.v54i4.909 fatcat:ipvbiyhembcybhf2hoevizblju