Kinetics of Indium Leaching from High Indium Sphalerite in Oxygen Pressure Acid Leaching Process

doi:10.12068/j.issn.1005-3026.2019.09.008

Abstract

Abstract: Indium is an important multi-purpose strategic metal and has many potential high-valuable industrial applications. However， there are no independent deposits， often associated with sulfide ore such as lead and zinc. In this work， the indium leaching kinetics of oxygen pressure acid leaching were studied under a traditional electric heating condition. The effects of particle size， temperature， H₂SO₄ concentration， and oxygen partial pressure on leaching rate of indium were investigated. Indium leaching kinetics was studied using a "liquid-solid phase leaching reaction kinetics model with solid product layer". The results showed that indium leaching process was controlled by interfacial chemical reaction with the apparent activation energy of 69.735kJ/mol. Moreover， the leaching efficiency of indium increased with the increase of the initial acid concentration， oxygen partial pressure， leaching temperature， and the decrease of particle size.

Key words: high indium sphalerite, indium, leaching, oxygen pressure acid leaching, kinetics

CLC Number:

TF813

FAN Yang-yang， LIU Yan， NIU Li-ping， ZHANG Ting-an. Kinetics of Indium Leaching from High Indium Sphalerite in Oxygen Pressure Acid Leaching Process[J]. Journal of Northeastern University Natural Science, 2019, 40(9): 1257-1262.

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