TY - JOUR
T1 - COMPARATIVE STUDY OF GOLD EXTRACTION FROM REFRACTORY PYRITIC ORES THROUGH CONVENTIONAL LEACHING AND SIMULTANEOUS PRESSURE LEACHING/OXIDATION.
T2 - GOLD EXTRACTION FROM REFRACTORY PYRITIC ORES THROUGH SIMULTANEOUS PRESSURE LEACHING/OXIDATION.
AU - Valenzuela, Jesus L
AU - Salazar Campoy, Maria Mercedes
AU - Quiroz-Castillo, Luis Sergio
AU - Guerrero Germán, Patricia
AU - Encinas Romero, Martín Antonio
AU - Tiburcio Munive, Guillermo del Carmen
AU - Parga Torres, Jose Refugio
PY - 2020/5/6
Y1 - 2020/5/6
N2 - 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.
AB - 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.
KW - Gold extraction
KW - Oxidation
KW - Pressure leaching
KW - Pyritic ores
KW - Refractory ores
UR - http://www.scopus.com/inward/record.url?scp=85085142233&partnerID=8YFLogxK
U2 - 10.1007/s42461-020-00217-6
DO - 10.1007/s42461-020-00217-6
M3 - Artículo
AN - SCOPUS:85085142233
VL - 2
SP - 1
EP - 6
JO - MINING, METALLURGY AND EXPLORATION
JF - MINING, METALLURGY AND EXPLORATION
SN - 2524-3470
IS - 1
M1 - doi.org/10.1007/s42461-020-00217-6
ER -