TY - JOUR
T1 - Gold Extraction from a Refractory Sulfide Concentrate by Simultaneous Pressure Leaching/Oxidation
AU - Soto-Uribe, Juan Carlos
AU - Valenzuela-Garcia, Jesus Leobardo
AU - Salazar-Campoy, Maria Mercedes
AU - Parga-Torres, Jose Refugio
AU - Tiburcio-Munive, Guillermo
AU - Encinas-Romero, Martin Antonio
AU - Vazquez-Vazquez, Victor Manuel
N1 - Publisher Copyright:
© 2023 by the authors.
PY - 2023/1
Y1 - 2023/1
N2 - Most gold deposits occur associated with sulphides like pyrite and arsenopyrite; thus, precious metal dissolution is possible by oxidizing auriferous sulfide concentrate using simultaneous pressure oxidation and cyanidation. The effectiveness of this process of extraction can be influenced by the temperature, cyanide (NaCN) concentration, and oxygen pressure. In this study, we conducted experiments to characterize the effects on gold extraction of ores using a range of sodium cyanide concentrations (1–8 g/L), temperatures (40–75 °C), and oxygen pressures (0.5–1.1 MPa). Characterization of the ores showed that pyrite and quartz were the main minerals present in the concentrate. The best results in terms of the highest extraction of Au were obtained with an oxygen pressure of 0.5 MPa, 6 g/L sodium cyanide, and a temperature of 75 °C, along with a constant stirring speed of 600 rpm. These conditions allowed for approximately 95% gold extraction in 90 min.
AB - Most gold deposits occur associated with sulphides like pyrite and arsenopyrite; thus, precious metal dissolution is possible by oxidizing auriferous sulfide concentrate using simultaneous pressure oxidation and cyanidation. The effectiveness of this process of extraction can be influenced by the temperature, cyanide (NaCN) concentration, and oxygen pressure. In this study, we conducted experiments to characterize the effects on gold extraction of ores using a range of sodium cyanide concentrations (1–8 g/L), temperatures (40–75 °C), and oxygen pressures (0.5–1.1 MPa). Characterization of the ores showed that pyrite and quartz were the main minerals present in the concentrate. The best results in terms of the highest extraction of Au were obtained with an oxygen pressure of 0.5 MPa, 6 g/L sodium cyanide, and a temperature of 75 °C, along with a constant stirring speed of 600 rpm. These conditions allowed for approximately 95% gold extraction in 90 min.
KW - cyanidation
KW - gold-bearing
KW - pressure leaching
KW - pressure oxidation
UR - http://www.scopus.com/inward/record.url?scp=85146575511&partnerID=8YFLogxK
U2 - 10.3390/min13010116
DO - 10.3390/min13010116
M3 - Artículo
AN - SCOPUS:85146575511
SN - 2075-163X
VL - 13
JO - Minerals
JF - Minerals
IS - 1
M1 - 116
ER -