Paper Information

Journal:   JOURNAL OF APPLIED CHEMICAL RESEARCH (JACR)   2017 , Volume 11 , Number 1; Page(s) 125 To 134.
 
Paper:  DISSOLUTION KINETIC EVALUATION OF MANGANESE-RICH IRON ORE BY SULPHURIC ACID SOLUTION
 
Author(s):  ABDULLAHI BABA ALAFARA*, SALIU MUSA JOHN, TEMITOPE OLAOLUWA DAUD, OMOTAYO ABU TAOFIQAT, BABATUNDE BALE RAFIU, AMOO ADEKOLA FOLAHAN
 
* DEPARTMENT OF INDUSTRIAL CHEMISTRY, UNIVERSITY OF ILORIN, ILORIN, NIGERIA
 
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 H2SO4 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 H2SO4 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.

 
Keyword(s): IRON ORE, CHARACTERIZATION, LEACHING, DISSOLUTION MECHANISM