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| Research on Carbon-in-Leaching of Gold Ore after Pretreatment |
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Received:March 24, 2016
Revised:April 06, 2016
Accepted:April 06, 2016
Published Online:August 19, 2016
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| DOI：doi：10.3969/j.issn.1007-7545.2016.09.008 |
| KeyWord:refractory gold ore; pressure oxidation; carbon-in-leach process (CIL) |
| Author | Institution |
| LUO Xing |
中国有色桂林矿产地质研究院有限公司 |
| LI Jinshan |
中国有色桂林矿产地质研究院有限公司 |
| ZHOU Weining |
中国有色桂林矿产地质研究院有限公司 |
| FENG Jifu |
中国有色桂林矿产地质研究院有限公司 |
| MA Rongkai |
中国有色桂林矿产地质研究院有限公司 |
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| Abstract: |
| Residue of refractory gold ore after pressure oxidation pretreatment was leached by carbon-in-leach (CIL). Effects of pH, slurry-mixing time, active carbon concentration, initial concentration of NaCN, and leaching time on gold leaching rate were investigated. The results show that gold leaching rate is 95.34% with NaCN consumption of 0.27~0.29 kg/t under the optimum conditions including active carbon concentration of 60 kg/t, CaO consumption of 35 kg/t, initial concentration of NaCN of 1.5 kg/t, slurry-mixing time of 2 h, and leaching duration of 2~4 h at room temperature. This process has the advantages of fast reaction kinetics, high gold leaching rate, and low consumption of NaCN. |
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