Gold Extraction from a Refractory Sulfide Concentrate by Simultaneous Pressure Leaching/Oxidation

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 cyanidation. The effectiveness of this process extraction can be influenced the temperature, cyanide (NaCN) concentration, oxygen pressure. In study, we conducted experiments to characterize effects on ores a range sodium concentrations (1–8 g/L), temperatures (40–75 °C), pressures (0.5–1.1 MPa). Characterization showed that quartz were main minerals present in concentrate. best results terms highest Au obtained an 0.5 MPa, 6 g/L cyanide, temperature 75 °C, along constant stirring speed 600 rpm. These conditions allowed for approximately 95% 90 min.