Effect of microwave-assisted heating on chalcopyrite leaching of kinetics, interface temperature and surface energy

被引：35

作者：

Wen, Tong ^{[1
]}

Zhao, Yunliang ^{[1
]}

Xiao, Qihang ^{[1
]}

Ma, Qiulin ^{[1
]}

Kang, Shichang ^{[1
]}

Li, Hongqiang ^{[2
]}

Song, Shaoxian ^{[1
]}

机构：

[1] Wuhan Univ Technol, Sch Resources & Environm Engn, Luoshi Rd 122, Wuhan 430070, Hubei, Peoples R China

[2] Wuhan Inst Technol, Sch Resources & Environm Engn, Wuhan 430205, Hubei, Peoples R China

来源：

RESULTS IN PHYSICS | 2017年 / 7卷

关键词：

Microwave-assisted heating; Chalcopyrite; Leaching kinetics; Interface temperature; Surface energy; PASSIVATION; SULFATE; MEDIA;

D O I：

10.1016/j.rinp.2017.07.035

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页码：2594 / 2600

页数：7

共 31 条

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