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Communication Dans Un Congrès Année : 2022

Bioleaching pond technology upscaling for the reprocessing of a sulfidic polymetallic mining residue

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Résumé

A new concept of a bioleaching reactor-the bioleaching pond-was recently developed by BRGM. It will allow applying the bioleaching process on primary or secondary ores and mining residues, with a lower CAPEX than a classical bioleaching reactor and more efficiently than heap bioleaching. Pulp suspension and gas-liquid mass transfer are achieved in the pond using floating agitators [1]. In the frame of H2020 NEMO project [2] , the technology upscaling was studied from lab to pilot scale on a complex secondary material provided by Sotkamo mine (Finland) [3]. Lab-scale experiments were performed to select a microbial consortium, to study the leaching mechanisms and to select the operating parameters [4]. A 114-L continuous pilot was run to study the effect of the residence time and the increase in pulp density on the microbial activity. Finally, a 1.8-m 3 pilot reactor was used to test the concept of the floating agitator, particularly in terms of hydrodynamics. Results showed that the bioleaching process was successfully scaled up at TRL 6-7 maintaining high metal recovery yields and satisfactory kinetics despite some technical issues regarding the application of the floating agitator. These results were used to feed a CFD model and to design a full-scale industrial reactor.
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Dates et versions

hal-03656047 , version 1 (30-04-2022)

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  • HAL Id : hal-03656047 , version 1

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Douglas Pino Herrera, Agathe Hubau, Catherine Joulian, Anne-Gwenaëlle Guezennec. Bioleaching pond technology upscaling for the reprocessing of a sulfidic polymetallic mining residue. 15th International Conference on Gas-Liquid and Gas-Liquid-Solid Reactor Engineering, Aug 2022, Ottawa, Canada. ⟨hal-03656047⟩

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