FRANCISCO PATIÑO, JUAN HERNÁNDEZ, MIZRAIM U. FLORES, IVÁN A. REYES3, MARTÍN, REYES, JULIO C. JUÁREZ, CHARACTERIZATION AND STOICHIOMETRY OF THE CYANIDATION REACTION IN NAOH OF ARGENTIAN WASTETAILINGS OF PACHUCA, HIDALGO, MÉXICO, CHARACTERIZATION OF MINERALS, METALS, AND MATERIALS 2016, 355-362, (2016), ISBN 978-1-119-26439-2, EDITED BY: SHADIA JAMIL IKHMAYIES, BOWEN LI, JOHN S. CARPENTER, JIANN-YANG HWANG, SERGIO NEVES MONTEIRO, JIAN LI, DONATO FIRRAO, MINGMING ZHANG, ZHIWEI PENG, JUAN P. ESCOBEDO-DIAZ, AND CHENGUANG BAI, PUBLISHED BY JOHN WILEY & SONS, INC., HOBOKEN, NEW JERSEY.
The argentian resources of Pachuca, Hidalgo, México have suffered an extensive exploitation, resulting in more than 100 million tons of waste tailings located in several sites around the city of Pachuca and surrounding municipalities. Chemical,mineralogical and granulometric characterization of the waste tailings of Pachuca, Hidalgo, México, was carried out in this work. Characterization results indicate that these argentian wastes contain 56 g Ag ton?1, and the silver is present in the forms of metal, argentite and argentian jarosite in a quartz matrix. Stoichiometry of the cyanidation reaction in NaOH media was analyzed, and the following conclusions were obtained: 1) both metal silver and silver present in the form of argentite can be quickly cyanidation, 2) Alkaline decomposition of argentian jarosite is the rate-control step in the cyanidation reaction.