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Effect of temperature on iron leaching from bauxite residue by sulfuric acid
Zhi-Rong Liu1, Kai Zeng, Wei Zhao
1Department of Applied Chemistry, East China University of Technology, Fuzhou City, Jiangxi 344000, China. liu-zhi-rong-oyx@sohu.com
Abstract:
Bauxite residue, as solid waste from alumina production, contains mainly hematite [Fe2O3]. Kinetic study of iron leaching of bauxite residue by diluted sulfuric acid at atmospheric pressure has been investigated. The results have been obtained as following: (i) Temperature play an important role in iron leaching from bauxite residue. Higher temperature is favor of Fe(III) leaching from bauxite residue. (ii) The leaching process is applicable to the intra-particle diffusion model and the apparent activation energy of model of leaching is found to be 17.32 kJ/mol.
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