Title of article
Dissolution Kinetic Evaluation of Manganese-rich Iron ore by Sulphuric acid Solution
Author/Authors
Abdullahi Baba, Alafara Department of Industrial Chemistry - University of Ilorin, Ilorin, Nigeria , John Saliu, Musa Department of Industrial Chemistry - University of Ilorin, Ilorin, Nigeria , Temitope Olaoluwa, Daud Department of Chemistry - University of Ilorin, Ilorin, Nigeria , Omotayo Abu, Taofiqat Department of Chemistry - University of Ilorin, Ilorin , Babatunde Bale, Rafiu Department of Geology and Mineral Sciences - University of Ilorin, Ilorin, Nigeria , Amoo Adekola, Folahan Department of Industrial Chemistry - University of Ilorin, Ilorin, Nigeria
Pages
10
From page
125
To page
134
Abstract
This study investigated the optimum conditions for the leaching of manganese-rich iron ore for subsequent beneficiation studies in laboratory scale. The experiments were carried out by varying the concentration of H2 SO4 solution and the leaching temperature. The properties of the iron ore was characterized by X-ray fluorescence (XRF), X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) as well asphoto-micrographic examination. The leaching experiments showed that the ore leaching increases with increasing acid concentration and temperature. About 78.9% of the iron ore was reacted within 120 minutes by 4M H2 SO4 solution at a temperature of 80oC. The activation energy (Ea) and the order of reaction were determined to be 31.14kJ/mol and 0.979, respectively. The leaching data were fitted to the shrinking core model and the experimental results followed a diffusion controlled mechanism. The residual product at optimal leaching was appropriately characterized and was found to contain silicate compound.
Keywords
Iron ore , characterization , leaching , Dissolution mechanism
Serial Year
2017
Record number
2494916
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