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| Oxidative Pressure Leaching of Gold from Refractory Gold Sulfide Concentrates with Alkaline Thiocyanate Solution |
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Received:February 25, 2011
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| DOI：DOI：10.3969/j.issn.1007-7545.2011.10.007 |
| KeyWord:Oxidative pressure leaching; Refractory gold sulfide concentrate; Thiocyanate; Orthogonal experiments |
| Author | Institution |
| GUO Huan |
中南大学冶金科学与工程学院 |
| YANG Sheng-hai |
中南大学冶金科学与工程学院 |
| CHEN Yong-ming |
中南大学冶金科学与工程学院 |
| YAO Wei-yi |
中南大学冶金科学与工程学院 |
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| Abstract: |
| An oxidative pressure leaching process to extract gold from the refractory gold sulfide concentrate with alkaline thiocyanate solution was proposed. An L16(45) standard orthogonal array was employed to evaluate the effects of amount of alkali, sodium thiocyanate concentration, reaction temperature, reaction time, and oxygen pressure on gold leaching percentage. The result shows that reaction temperature is the most significant factor affecting gold leaching. The extraction percentage of gold can reach 95.29% with the optimum conditions of NaSCN concentration 2.0 mol/L, 0.8 times of the theoretical alkali amount, and oxygen pressure 1.2 MPa at 180 ℃ for 8 hours. |
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