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| Leaching Kinetics of Aluminum from Aluminum Dross with Hydrochloric Acid |
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Received:January 23, 2022
Revised:January 26, 2022
Accepted:February 09, 2022
Published Online:May 11, 2022
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| DOI：doi：10.3969/j.issn.1007-7545.2022.06.007 |
| KeyWord:aluminum dross; acid leaching; leaching rate; kinetics |
| Author | Institution |
| YUAN Jie |
六盘水师范学院化学与材料工程学院 |
| LUO Liang-kun |
六盘水师范学院化学与材料工程学院 |
| LIN AN-wei |
六盘水师范学院化学与材料工程学院 |
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| Abstract: |
| Aluminum dross is rich in aluminum and has high recovery potential. Effects of initial acid concentration, leaching temperature and time, and L/S on leaching rate of aluminum from aluminum dross were studied. Thermodynamic analysis shows that aluminum exists in the form of Al3+ in acidic solution when pH value is less than 2. Experimental results show that aluminum leaching rate is 85.86% under the optimum conditions including particle size of -150 μm, temperature of 80 ℃, initial acid concentration of 6 mol/L, L/S of 10, and reaction time of 120 min. The unreacted shrinking core model is used for leaching kinetic analysis. Leaching process is controlled by diffusion with apparent activation energy of 3.11 kJ/mol. Extraction rate of aluminum from aluminum dross can be improved by increasing reaction temperature, reducing raw material particle size, and strengthening stirring. |
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