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| Effect and mechanism of ultrasonic adsorption of sodium sulfide on chalcopyrite surface |
| Received:October 09, 2023 Revised:October 11, 2023 |
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| DOI：doi：10.3969/j.issn.1671-9492.2024.08.005 |
| KeyWord:ultrasound; chalcopyrit; Adsorption capacity; flotation |
| Author | Institution |
| RenSen |
Zijin School of Geology and Mining, Fuzhou University |
| Yin Wanzhong |
Zijin School of Geology and Mining, Fuzhou University |
| Wangying |
Zijin School of Geology and Mining, Fuzhou University |
| Zhangyunxin |
Zijin School of Geology and Mining, Fuzhou University |
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| Abstract: |
| In order to solve the problem that the amount of chalcopyrite inhibitor sodium sulfide is large and the inhibition effect is not good in the separation of copper-molybdenum mixed concentrate, the inhibition effect of ultrasonic treatment strengthened sodium sulfide on chalcopyrite was studied, and the mechanism of ultrasonic enhanced adsorption of sodium sulfide on the surface of chalcopyrite was studied by means of electrokinetic potential, UV-visible spectrophotometer and X-ray photoelectron spectroscopy (XPS). The results show that ultrasonic treatment can promote the adsorption of sodium sulfide on the surface of chalcopyrite, so as to enhance the inhibition effect of sodium sulfide and reduce the flotation recovery rate of chalcopyrite. Under the conditions of pH value of 10, sodium sulfide concentration of 45 mg/L, sodium sulfide action time of 3 min, ultrasonic power of 280 W and ultrasonic time of 30 s, the adsorption capacity of sodium sulfide reaches the maximum, and the inhibition effect on chalcopyrite is the strongest. Compared with sodium sulfide action alone, the flotation recovery rate is reduced by 19.77%. The adsorption capacity of sodium sulfide increased by 0.201 mg/g. The mechanism study showed that ultrasonic treatment promoted the exposure of more active sites on the surface of chalcopyrite, such as the Cu content on the surface of chalcopyrite increased from 4.41% to 6.63%, promoting the adsorption of sodium sulfide on the surface of chalcopyrite, and achieved the effect of inhibiting chalcopyrite. |
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