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| Ammonia Cyanide Leaching of Alkaline Carbonate Copper-bearing Gold Mine |
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Received:June 05, 2014
Revised:June 09, 2014
Accepted:June 16, 2014
Published Online:October 15, 2014
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| DOI：10.3969/j.issn.1007-7545.2014.11.012 |
| KeyWord:ammonium cyanide method; copper bearing refractory gold ore; carbonate; selective leaching |
| Author | Institution |
| ZHANG Wenbo |
厦门紫金矿冶技术有限公司 |
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| Abstract: |
| An alkaline carbonate copper-bearing gold mine was treated by ammonium cyanide leaching process. The results show that the optimum conditions include particle size of -0.074 mm of 95%, lime dosage of 4.0 kg/t, dosage of ammonium sulfate of 8.0~9.0 kg/t, total dosage of sodium cyanide of 0.5~0.7 kg/t, cyanide leaching time in roller bottles of 52~72 h, and adsorption time of 20~24 h with activated carbon density of 10 g/L. After 12 times cyclic test, the average gold leaching rate is about 86.0%, the final copper-gold loaded carbon ratio is about 2.0, and the gold adsorption rate is nearly 100% without gradual accumulation of copper and TDS. |
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