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Advances in Materials Science and Engineering
Volume 2016, Article ID 5813542, 6 pages
http://dx.doi.org/10.1155/2016/5813542
Research Article

Kinetics of the Leaching Process of an Australian Gibbsitic Bauxite by Hydrochloric Acid

1School of Material Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China
2Collaborative Innovation Center of Taiyuan Heavy Machinery Equipment, Taiyuan University of Science and Technology, Taiyuan 030024, China
3Key Laboratory of Ecological Utilization of Multi-Metal Intergrown Ores of Ministry of Education, Northeastern University, Shenyang 110819, China
4School of Electronic Information Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China

Received 23 February 2016; Revised 5 June 2016; Accepted 6 June 2016

Academic Editor: Luigi Nicolais

Copyright © 2016 Aichun Zhao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Gibbsitic bauxite from Australia was leached by hydrochloric acid in this work. Analysis on kinetics for the extraction of Al2O3 was quantitatively studied. It was concluded that the hydrochloric acid leaching process of gibbsitic bauxite was controlled by chemical reaction. Moreover, the mechanism for the dissolution followed the equation, , with an apparent activation energy of 137.90 kJ/mol, according to the equation of . This work aims to provide a good theory support for the process control by using a new method of alumina production from the low grade bauxite.