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| Experimental study on flotation recovery of copper and associated gold and silver from copper ores with high content of calcium and silicon |
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Received:March 13, 2020
Revised:March 29, 2020
Accepted:March 30, 2020
Published Online:July 16, 2020
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| DOI： |
| KeyWord:Copper ores with high content of calcium and silicon; Associated gold and silver; Flotation recovery; Combined utilization of flotation reagents |
| Author | Institution |
| ZHOU Yun |
Kunming University of Science and Technology |
| FENG Qicheng |
Faculty of Land Resource Engineering, Kunming University of Science and Technology |
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| Abstract: |
| The element copper and associated gold and silver in copper ores with high content of calcium and silicon have high recovery value, but a low recovery index of these valuable metals was obtained in the practical production, resulting in unsatisfactory economic benefits of enterprise. Based on the ore properties, flotation reagent optimization and closed circuit flotation experiments were conducted in this work. During this process, lime and sodium sulfide were used as slurry regulator, butyl xanthate and ammonium dibutyl dithiophosphate were used together as collector, and the fraction content of -74 um was determined to be 70% with regard to the grinding degree. Under the flotation reagent regime of lime dosage with 1000 g/t, sodium sulfide dosage with 400 g/t, butyl xanthate dosage with 400 g/t, ammonium dibutyl dithiophosphate dosage with 50 g/t, and terpenic oil dosage with 84 g/t, the flowsheet of closed circuit flotation experiments with the order return of middlings was carried out using two-stage roughing, two-stage cleaning, and single-stage scavenging. Ultimately, copper concentrate with 21.45% Cu, 7.92 g/t Au and 453.50 g/t Ag was obtained, and the flotation recoveries of Cu, Au, Ag were 90.46%, 79.39%, 81.82%, respectively. Compared with the flotation result in the production, this work not only increased the flotation recovery of copper in ores, but also grealty improved the recovery of associated gold and silver in ores, and a desired flotation index was obtained. |
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