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| Experimental study on gold extraction from gold concentrate in Yunnan |
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Received:December 30, 2016
Revised:January 06, 2017
Accepted:January 09, 2017
Published Online:August 22, 2017
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| DOI： |
| KeyWord:Gold concentrat;Cyanide leaching; Gold extraction rate;;Aid-1eaching reagen |
| Author | Institution |
| pengwei |
State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization |
| Tong Xiong |
State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization |
| ZhangZihiang |
Yunnan?Hualian?Zinc?&?Indium?Stock?Co?.,Ltd. |
| Song qiang |
State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization |
| Zhang Shengdong |
State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization |
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| Abstract: |
| The cyanide leaching of a gold concentrate from Yunnan province was studied in this paper. The gold concentrate contains 33.3g/t gold, and gold with the form of natural gold is mainly distributed in the pyrite or weathered cracks of metal oxide. The effects of grinding fineness, sodium cyanide dosage, lime dosage, leaching time and solid-liquid ratio on the leaching rate were studied. The optimum process conditions were determined by experiment, under the optimal conditions, the leaching rate can reach 97.90%. At the same time, the effects of aid leaching agent such ashydrogen peroxide on the leaching rate, the consumption of sodium cyanide and the leaching time were studied. The results show that the leaching rate of gold, the time of leaching and the consumption of NaCN are reduced significantly after the addition of leaching aid agent. |
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