Hydrometallurgical application for treating a Nigerian chalcopyrite ore in chloride medium: Part I. Dissolution kinetics assessment

Alafara A. Baba; Kuranga I. Ayinla; Folahan A. Adekola; Rafiu B. Bale; Malay K. Ghosh; Abdul G. F. Alabi; Abdul R. Sheik; Ismael O. Folorunso

doi:10.1007/s12613-013-0829-x

Volume 20 Issue 11

Nov. 2013

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文章导航 > 矿物冶金与材料学报（英文） > 2013 > 20(11): 1021-1028

Alafara A. Baba, Kuranga I. Ayinla, Folahan A. Adekola, Rafiu B. Bale, Malay K. Ghosh, Abdul G. F. Alabi, Abdul R. Sheik, and Ismael O. Folorunso, Hydrometallurgical application for treating a Nigerian chalcopyrite ore in chloride medium: Part I. Dissolution kinetics assessment, Int. J. Miner. Metall. Mater., 20(2013), No. 11, pp. 1021-1028. https://doi.org/10.1007/s12613-013-0829-x

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Alafara A. Baba, Kuranga I. Ayinla, Folahan A. Adekola, Rafiu B. Bale, Malay K. Ghosh, Abdul G. F. Alabi, Abdul R. Sheik, and Ismael O. Folorunso, Hydrometallurgical application for treating a Nigerian chalcopyrite ore in chloride medium: Part I. Dissolution kinetics assessment, Int. J. Miner. Metall. Mater., 20(2013), No. 11, pp. 1021-1028. https://doi.org/10.1007/s12613-013-0829-x

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Hydrometallurgical application for treating a Nigerian chalcopyrite ore in chloride medium: Part I. Dissolution kinetics assessment

Department of Industrial Chemistry, University of Ilorin, P.M.B. 1515, Ilorin, 240003, Nigeria
Department of Chemistry, Institute of Basic and Applied Sciences, Kwara State Polytechnic, P.M.B. 1375, Ilorin, Nigeria
Department of Geology and Mineral Sciences, University of Ilorin, P.M.B. 1515, Ilorin, 240003, Nigeria
Hydro & Electrometallurgy Department, Institute of Minerals and Materials Technology, Bhebaneswar, 751013, India
Department of Materials & Metallurgical Engineering, University of Ilorin, P.M.B. 1515, Ilorin, 240003, Nigeria

通讯作者:
Alafara A. Baba E-mail: alafara@unilorin.edu.ng

中文摘要

The dissolution kinetics of a Nigerian chalcopyrite ore in hydrochloric acid was studied in this article. Acid concentration, reaction temperature, and ore particle size were chosen as experimental parameters. The chemical and morphological studies of the ore before and after leaching at optimal conditions were carried out by X-ray diffraction (XRD) and scanning electron microscopy (SEM). It is revealed that increasing the acid concentration and system temperature and decreasing the ore particle size greatly enhances the dissolution rate. The dissolution kinetics was found to follow the shrinking core model for the diffusion control mechanism where the activation energy (E_a) of 32.92 kJ·mol⁻¹ was obtained for the process and supported by morphological changes at a higher dissolution of 91.33%.

关键词:

Hydrometallurgical application for treating a Nigerian chalcopyrite ore in chloride medium: Part I. Dissolution kinetics assessment

+ Author Affiliations

Department of Industrial Chemistry, University of Ilorin, P.M.B. 1515, Ilorin, 240003, Nigeria
Department of Chemistry, Institute of Basic and Applied Sciences, Kwara State Polytechnic, P.M.B. 1375, Ilorin, Nigeria
Department of Geology and Mineral Sciences, University of Ilorin, P.M.B. 1515, Ilorin, 240003, Nigeria
Hydro & Electrometallurgy Department, Institute of Minerals and Materials Technology, Bhebaneswar, 751013, India
Department of Materials & Metallurgical Engineering, University of Ilorin, P.M.B. 1515, Ilorin, 240003, Nigeria

Corresponding author:
Alafara A. Baba E-mail: alafara@unilorin.edu.ng
Received: 27 January 2013; Revised: 4 May 2013; Accepted: 8 May 2013

Abstract

Abstract

The dissolution kinetics of a Nigerian chalcopyrite ore in hydrochloric acid was studied in this article. Acid concentration, reaction temperature, and ore particle size were chosen as experimental parameters. The chemical and morphological studies of the ore before and after leaching at optimal conditions were carried out by X-ray diffraction (XRD) and scanning electron microscopy (SEM). It is revealed that increasing the acid concentration and system temperature and decreasing the ore particle size greatly enhances the dissolution rate. The dissolution kinetics was found to follow the shrinking core model for the diffusion control mechanism where the activation energy (E_a) of 32.92 kJ·mol⁻¹ was obtained for the process and supported by morphological changes at a higher dissolution of 91.33%.
- chalcopyrite;
- hydrometallurgy;
- leaching, hydrochloric acid;
- dissolution;
- ore treatment