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Microwave Assisted Dissolution of Sri Lankan Ilmenite: Extraction and Leaching Kinetics of Titanium and Iron Metals

Authors:

W.A.P.J. Premaratne ,

University of Kelaniya, LK
About W.A.P.J.

Senior Lecturer

Department of Chemistry, University of Kelaniya, Sri Lanka

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N.A. Rowson

University of Birmingham, GB
About N.A.
School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham
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Abstract

The kinetics of the leaching of titanium and iron from Sri Lankan ilmenite in a sulphuric acid medium heated by microwave energy is studied. The effects of the concentration of sulphuric acid, reaction temperature and particle size on the kinetics of dissolution of ilmenite are investigated. Results show that both the acid concentration and the temperature have significant effects on the rate of dissolutions of titanium and iron from ilmenite. The dissolution of both titanium and iron from ilmenite was controlled by a chemical reaction on the surface of ilmenite particles. Maximum extractions of 74.2 (±1.1) % of titanium and 71.3 (±0.8) % of iron from the ilmenite ore were achieved using a microwave leaching system of 600 W, 2.45 GHz. Experimental results further showed that the apparent activation energies for the dissolution of titanium and iron were 137 kJ mol-1 and 117.1 kJ mol-1 respectively. Therefore, microwave energy has a potential for the speedy and efficient leaching of ilmenite and in a commercial context it can be used as a more economical and environmental friendly process. The results of the mineralogical and chemical analysis studies for the ilmenite ore indicated that both ilmenite (FeTiO3) and pseudorutile (Fe2Ti3O9) minerals were present with a grade of 37.9% titanium.

 J. Sci. Univ. Kelaniya 9 (2014): 01-14

How to Cite: Premaratne, W.A.P.J. & Rowson, N.A., (2015). Microwave Assisted Dissolution of Sri Lankan Ilmenite: Extraction and Leaching Kinetics of Titanium and Iron Metals. Journal of Science of the University of Kelaniya Sri Lanka. 9, pp.1–14. DOI: http://doi.org/10.4038/josuk.v9i0.6398
Published on 09 Jul 2015.
Peer Reviewed

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