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| Exploration Test on Gold Extraction from Arsenopyrite Gold Concentrate with Oxidation Pressure Leaching Process in Ammonium Thiocyanate-Ammonia System |
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Received:March 29, 2012
Revised:March 31, 2012
Accepted:April 01, 2012
Published Online:August 20, 2012
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| DOI：doi：10.3969/j.issn.1007-7545.2012.09.010 |
| KeyWord:refractory gold concentrate; ammonium thiocyanate; arsenopyrite; oxidation pressure leaching |
| Author | Institution |
| huyanqing |
中南大学 |
| Yang Shenghai |
中南大学冶金科学与工程学院 |
| Chen Yongming |
中南大学冶金科学与工程学院 |
| liuqing |
中南大学冶金科学与工程学院 |
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| Abstract: |
| The exploration test on gold extraction from arsenopyrite gold concentrate with oxidation pressure leaching process in ammonium thiocyanate-ammonia system was performed. The effects of leaching temperature，copper concentration, leaching time, ratio of liquid to solid (L/S), ammonia concentration , oxygen pressure, and the concentration of ammonium thiocyanate on gold leaching rate were studied. The results show that the gold leaching ratio is 61.7% under the optimum conditions including NH4SCN concentration of 3 mol/L, L/S=5, leaching temperature of 150 ℃, leaching time of 6 hours, stirring speed of 750 r/min, ammonia concentration of 4.64 mol/L, and copper dosage of 1.5 g/L. The gold leaching ratio can leach 86.2% after the pretreatment of roasting at 400 ℃. |
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