Comparative Study of Gold Extraction from Refractory Pyritic Ores through Conventional Leaching and Simultaneous Pressure Leaching/Oxidation "Mining, Metallurgy & Exploration"
- Organization:
- Society for Mining, Metallurgy & Exploration
- Pages:
- 6
- File Size:
- 1091 KB
- Publication Date:
- May 7, 2020
Abstract
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 carried out on a pyritic ore from the Mulatos Mine
located in Sahuaripa, Sonora, Mexico. Mineral characterization, agitation leaching, hot cyanidation under atmospheric pressure
conditions, simultaneous moderated pressure oxidation and leaching, and kinetic testing results are shown. The modified
variables were temperature, pressure, and cyanide concentration. Characterization indicated that pyrite was the main mineral.
Simultaneous pressure oxidation and leaching experiments were conducted at a temperature range of 40–80 °C, oxygen pressure
of 87.5–200 psi, and cyanide concentration of 0.8–1.2 wt% in a 2-L Parr pressure reactor. A dissolution rate of 81–86% was
achieved under the following conditions: 87.5 psi, 80 °C, 0.8 wt% NaCN, for 1 h.
Citation
APA: (2020) Comparative Study of Gold Extraction from Refractory Pyritic Ores through Conventional Leaching and Simultaneous Pressure Leaching/Oxidation "Mining, Metallurgy & Exploration"
MLA: Comparative Study of Gold Extraction from Refractory Pyritic Ores through Conventional Leaching and Simultaneous Pressure Leaching/Oxidation "Mining, Metallurgy & Exploration". Society for Mining, Metallurgy & Exploration, 2020.