期刊
RESULTS IN PHYSICS
卷 7, 期 -, 页码 2594-2600出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.rinp.2017.07.035
关键词
Microwave-assisted heating; Chalcopyrite; Leaching kinetics; Interface temperature; Surface energy
资金
- Natural Science Foundation of Hubei Province of China [2015CFB221]
- National Program of Innovation and Entrepreneurship Training for University Students of China [20171049708016]
The microwave-assisted leaching was a new approach to intensify the copper recovery from chalcopyrite by hydrometallurgy. In this work, the effect of microwave-assisted heating on chalcopyrite leaching of kinetics, interfacial reaction temperature and surface energy were investigated. The activation energy of chalcopyrite leaching was affected indistinctively by the microwave-assisted heating (39.1 kJ/mol) compared with the conventional heating (43.9 kJ/mol). However, the boiling point of the leaching system increased through microwave-assisted heating. Because of the improved boiling point and the selective heating of microwave, the interfacial reaction temperature increased significantly, which gave rise to the increase of the leaching recovery of copper. Moreover, the surface energy of the chalcopyrite through microwave-assisted heating was also enhanced, which was beneficial to strengthen the leaching of chalcopyrite. (C) 2017 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license.
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