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Modelling the process of kaolinite leaching from a copper mine flotation waste

Published online by Cambridge University Press:  09 July 2018

I. Djurić ,
I. Mihajlović ,
D. Bogdanović  and
Ž. Živković
I. Djurić
Affiliation:
University of Belgrade, Technical Faculty in Bor, Vojske Jugoslavije 12, 19210 Bor, Serbia
I. Mihajlović*
Affiliation:
University of Belgrade, Technical Faculty in Bor, Vojske Jugoslavije 12, 19210 Bor, Serbia
D. Bogdanović
Affiliation:
University of Belgrade, Technical Faculty in Bor, Vojske Jugoslavije 12, 19210 Bor, Serbia
Ž. Živković
Affiliation:
University of Belgrade, Technical Faculty in Bor, Vojske Jugoslavije 12, 19210 Bor, Serbia
*
*E-mail: imihajlovic@tf.bor.ac.rs
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Abstract

This paper presents the results of acidic leaching of kaolinite from the flotation waste of the RTB Bor copper mine, Serbia. The kaolinitic concentrate from the flotation waste contains 32% Al2O3. Kinetic investigations were conducted on the leaching of kaolinite roasted at 750°C for 60 min under air using H2SO4, HNO3 and HCl. Activation energies for the process were 74, 63 and 63.2 kJ mol–1 for sulphuric, nitric and hydrochloric acids, respectively. The kinetic function D3: [1 – (1 – α)1/3]2 = kt was chosen to describe the fractional conversion dependence on time and temperature. This enabled effective management of the leaching process to be carried out.

Keywords

kaolinitekineticsleachingacidsH2SO4HNO3HClBor copper mineSerbia
Type
Research Article
Information
Clay Minerals , Volume 45 , Issue 1 , March 2010 , pp. 107 - 114
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2010

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