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| Mechanisms and Kinetics of Ultrasonic Enhanced Leaching of Zinc-containing Dust |
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Received:March 15, 2023
Revised:March 22, 2023
Accepted:March 27, 2023
Published Online:June 16, 2023
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| DOI：doi：10.3969/j.issn.1007-7545.2023.07.004 |
| KeyWord:metallurgical dust sludge; ultrasonic enhancement; kinetics |
| Author | Institution |
| NIU Fu-sheng |
华北理工大学矿业工程学院 |
| BU Zi-heng |
华北理工大学矿业工程学院 |
| ZHANG Jin-xia |
华北理工大学矿业工程学院 |
| HE Sheng-tao |
华北理工大学矿业工程学院 |
| CHANG Zhen-jia |
华北理工大学矿业工程学院 |
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| Abstract: |
| In this study, a deep eutectic solvent was used as the leaching agent in a pilot study on the ultrasonic leaching of zinc from zinc-containing dust sludge. The impact of ultrasonic power, reaction time, solid-liquid ratio, temperature, and stirring rate was examined on the zinc leaching rate. The results showed that under the conditions of temperature 40°C, ultrasonic power 90 W, solid-liquid ratio 1:7, rotating speed 250 r/min, and leaching time 80 min, the ultrasonic leaching rate of zinc could reach 98.5%. Based on the leaching results, the kinetic equation of ultrasound-enhanced leaching was developed. In the kinetic analysis of ultrasonically enhanced leaching of Zn-containing dust sludge, the apparent activation energy of the reaction was 11.2 kJ/mol, indicating that the mixed solid product layer controls the ultrasonically enhanced leaching process. |
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