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| Technical Study on Heap Leaching for Low-grade Crude Gold Ores |
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Received:October 19, 2013
Revised:October 21, 2013
Accepted:October 23, 2013
Published Online:April 22, 2014
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| DOI：10.3969/j.issn.1007-7545.2014.05.014 |
| KeyWord:low-grade gold ore; heap leaching; cyaniding; leaching rate |
| Author | Institution |
| huangzhihua |
紫金矿业集团股份有限公司 |
| yangzhengguo |
紫金矿业集团股份有限公司 |
| suxiuzhu |
紫金矿业集团股份有限公司 |
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| Abstract: |
| The heap leaching experiments for low grade gold crude ore were carried out. The effects of fine ore ratio, height of heap, NaCN dosage, spray intensity, and spray pattern on gold leaching rate were investigated. The results show that the gold leaching rate is 76.1% under the optimum conditions including fine ore ratio of <8%, height of heap of 11.5 m, NaCN dosage of 0.17 kg/t, and spray intensity of 1.3 m3/t. Spray patterns include three-day spraying with the concentration of NaCN of (900~1 000)×10-6, three-day with the concentration of NaCN of (600~700)×10-6, four-day spraying with the concentration of NaCN of (300~400)×10-6, ten-day spraying with the concentration of NaCN of (100~200)×10-6, and 53-day spraying with the concentration of NaCN of (50~60)×10-6. |
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