Application of shrinking core model to bioleaching of black shale particles
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Wroclaw University of Technology
Publication date: 2006-01-01
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Zygmunt Sadowski
Wroclaw University of Technology, Faculty of Chemistry, Department of Chemical Engineering
Physicochem. Probl. Miner. Process. 2006;40(1):211-225
Four size fractions of a black shale ore originating from the Lubin Copper Mine (Southwestern Poland) were leached in a small column using autotrophic bacteria (Acidithiobacillus ferrooxidans). The best results of bioleaching were obtained for the most fine fraction, where the copper recovery was 84%, and the surface area of the ore increased from 4.50 m2/g to 13.74 m2/g. Based on the shrinking core model, a new model describing bioleaching of the black shale type ore in a column is proposed. The model is based on assumption of dependence of copper recovery and surface area increase during the process.
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