Kinetic modeling of copper bioleaching from low-grade ore from the Shahrbabak Copper Complex

Saman Beikzadeh Noei; Saeed Sheibani; Fereshteh Rashchi; Seyed Mohammad Javad Mirazimi

doi:10.1007/s12613-017-1443-0

Volume 24 Issue 6

Jun. 2017

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2017 > 24(6): 611-620

Saman Beikzadeh Noei, Saeed Sheibani, Fereshteh Rashchi, and Seyed Mohammad Javad Mirazimi, Kinetic modeling of copper bioleaching from low-grade ore from the Shahrbabak Copper Complex, Int. J. Miner. Metall. Mater., 24(2017), No. 6, pp. 611-620. https://doi.org/10.1007/s12613-017-1443-0

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Saman Beikzadeh Noei, Saeed Sheibani, Fereshteh Rashchi, and Seyed Mohammad Javad Mirazimi, Kinetic modeling of copper bioleaching from low-grade ore from the Shahrbabak Copper Complex, Int. J. Miner. Metall. Mater., 24(2017), No. 6, pp. 611-620. https://doi.org/10.1007/s12613-017-1443-0

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Research Article

Kinetic modeling of copper bioleaching from low-grade ore from the Shahrbabak Copper Complex

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Corresponding author:
Saeed Sheibani E-mail: ssheibani@ut.ac.ir
Received: 19 October 2016; Revised: 13 December 2016; Accepted: 15 December 2016

Abstract

Abstract

The copper recovery from low-grade copper sulfide ore was investigated using microbial leaching. Several parameters substantially affect the bioleaching of copper; among them, pulp density and nutrient media were selected for investigation. The optimum conditions for copper recovery were a pulp density of 5 g/mL, a mixed-mineral salt medium of Acidithiobacillus thiooxidans (70vol%) and Acidithiobacillus ferrooxidans (30vol%), and 10vol% of inoculum. Under these conditions, the maximum bioleaching capacity of the medium for copper recovery was determined to be approximately 99%. The effect of pulp density on the kinetics of the bioleaching process was surveyed using both da Silva's method and constrained multilinear regression analysis. The kinetics of copper dissolution followed the shrinking core model, and the process was diffusion controlled at a pulp density of 5 g/mL. Nevertheless, at higher pulp densities, the process was controlled by chemical reaction.
- bioleaching;
- kinetics;
- modeling;
- copper;
- mesophilic bacteria

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