A Pretreatment of Pyritic Gold Concentrate with Catalytic Oxidation Acid Leach
×
Citation (Style = APA)
Hanlin, Yang ; Fuerstenau, M. C. ; Guangxiang, Xia ; Wan, R. Y. (1993). A Pretreatment of Pyritic Gold Concentrate with Catalytic Oxidation Acid Leach.
Citation Downloads
Reference Manager (RIS)
SpreadSheed (CSV)
Hanlin, Yang ; Fuerstenau, M. C. ; Guangxiang, Xia ; Wan, R. Y. (1993). A Pretreatment of Pyritic Gold Concentrate with Catalytic Oxidation Acid Leach.
Citation Downloads
Reference Manager (RIS)
SpreadSheed (CSV)
Organization: Society for Mining, Metallurgy & Exploration
Pages: 12
Publication Date:
Jan 1, 1993
Email to a Friend
Abstract
Abstract
| The mechanism and kinetics of pretreatment on pyritic gold concentrate with the catalytic oxidation acid leach (COAL) process were studied in the temperature range of 80-100°C and oxygen pressure range of 230-1013 kPa, with sodium lignosulfonate (SL) and mixed medium of sulfuric acid (11 g/[ ]) and nitric acid (5.5 g/ [ ]). The results show that nitric acid acts as a catalyst, the surfactant changes the hydro-phobicity of resulting elemental sulfur to favor the oxidation of pyrite, and the oxidation-determining step would be the chemical reaction between nitric acid and pyrite. When about 80% of pyrite contained in the concentrate is oxidized, the gold cyanidation extraction exceeds 95 % . The nitric acid in solution can be recycled and used again. |
Full Article Download:
