Leaching reaction and kinetics of zinc from indium-bearing zinc ferrite under microwave heating

作者：Zhang, Linye^*; Mo, Jiamei; Li, Xuanhai; Pan, Liuping; Wei, Guangtao

来源：Russian Journal of Non-Ferrous Metals, 2016, 57(4): 301-307.

DOI：10.3103/S1067821216040143

• microwave
• kinetics
• zinc
• zinc ferrite
• indium
• leaching

Leaching of zinc from indium-bearing zinc ferrite (IBZF) under microwave heating (MH) has been investigated. The result showed microwave intensified the leaching reaction of IBZF in the MH process. Microwave had a great nonthermal effect on the leaching reaction. The effective collision and the H2SO4 activation under the action of microwave belonged to the nonthermal microwave effect. Particle size of IBZF in the range from 45 to 150 mu m almost had no effect on the zinc leaching in the MH process. Leaching temperature and leaching time had important effects on the zinc leaching. Zinc leaching in the MH process obeyed the unreacted shrinking core model very well, and the activation energy was 73.747 kJ/mol. The kinetic equation was . The ratio of frequency factor of K (0(In))/K (0(Zn)) was up to 4.69, indicating the effect of microwave intensification on the indium leaching was greater than that on the zinc leaching.

• 出版日期2016-7
• 单位广西大学