Hydrometallurgical application for treating a Nigerian chalcopyrite ore in chloride medium:Part I.Dissolution kinetics assessment
来源期刊：International Journal of Minerals Metallurgy and Materials2013年第11期
论文作者：Alafara A.Baba Folahan A.Adekola Rafiu B.Bale Abdul G.F.Alabi Ismael O.Folorunso
文章页码：1021 - 1028
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 difraction（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 difusion control mechanism where the activation energy（Ea）of 32.92 kJ·mol 1was obtained for the process and supported by morphological changes at a higher dissolution of 91.33%.
Alafara A.Baba1，Folahan A.Adekola1，Rafiu B.Bale3，Abdul G.F.Alabi5，Ismael O.Folorunso3
1. Department of Industrial Chemistry,University of Ilorin,P.M.B.15153. Department of Geology and Mineral Sciences,University of Ilorin,P.M.B.15155. Department of Materials & Metallurgical Engineering,University of Ilorin,P.M.B.1515
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 difraction（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 difusion control mechanism where the activation energy（Ea）of 32.92 kJ·mol 1was obtained for the process and supported by morphological changes at a higher dissolution of 91.33%.
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