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| Study on Oxidation Pretreatment of Refractory Gold Ore with Potassium Permanganate |
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Received:March 21, 2013
Revised:March 21, 2013
Accepted:March 25, 2013
Published Online:July 18, 2013
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| DOI：10.3969/j.issn.1007-7545.2013.08.009 |
| KeyWord:potassium permanganate, oxidation pretreatment; refractory gold ore; leaching rate |
| Author | Institution |
| TANG Dao-wen |
贵州大学材料与冶金学院 贵阳 |
| CHU chun-li |
贵州大学材料与冶金学院 贵阳 |
| WANG Rui |
贵州大学材料与冶金学院 贵阳 |
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| Abstract: |
| The package of gold sulfide and arsenic compound in refractory gold ore were broken with potassium permanganate in acidic condition to improve gold leaching rate. The results show that the optimum oxidation pretreatment conditions include dosage of potassium permanganate of 40 g/L, ratio of liquid to solid of 12∶1, initial concentration of H2SO4 of 1.0 mol/L, oxidation temperature of 80 ℃, and oxidation time of 5 h. The gold leaching rate is over 85% after oxidation pretreatment. |
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