María M. Salazar-Campoy, Jesús L. Valenzuela-García
Pressure oxidation is a hydrometallurgical oxidative pretreatment for refractory ores, such as sulfide ores. Here, simultaneous alkaline pressure oxidation and sodium cyanide leaching treatments were conducted on a pyritic ore from the Mulatos Mine located in Sahuaripa, Sonora, Mexico. The study involved mineral characterization, agitation leaching, hot cyanidation under atmospheric pressure conditions, and simultaneous moderated pressure oxidation and leaching, alongside kinetic testing. The modified variables included temperature, pressure, and cyanide concentration, with characterization indicating pyrite as the main mineral. Simultaneous pressure oxidation and leaching experiments were performed at temperature ranges of 40–80 °C, oxygen pressures of 87.5–200 psi, and cyanide concentrations of 0.8–1.2 wt% in a 2-L Parr pressure reactor. A notable dissolution rate of 81–86% was achieved under optimal conditions: 87.5 psi, 80 °C, and 0.8 wt% NaCN for 1 hour. This research highlights the effectiveness of simultaneous pressure oxidation and leaching for improving gold extraction from refractory ores.
@article{d9371c75-8325-4232-a529-a1333782a5d5,
title={Comparative Study of Gold Extraction from Refractory Pyritic Ores through Conventional Leaching and Simultaneous Pressure Leaching/Oxidation},
author={María M. Salazar-Campoy and Jesús L. Valenzuela-García},
year={2020},
language={en}
}TY - JOUR TI - Comparative Study of Gold Extraction from Refractory Pyritic Ores through Conventional Leaching and Simultaneous Pressure Leaching/Oxidation AU - María M. Salazar-Campoy AU - Jesús L. Valenzuela-García PY - 2020 LA - en ER -
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