Artículo
Demonstration Plant Equipment Design and Scale-Up from Pilot Plant of a Leaching and Solvent Extraction Process
Autor/es | Arroyo Torralvo, Fátima
Fernández Pereira, Constantino Bermejo, Pilar |
Departamento | Universidad de Sevilla. Departamento de Ingeniería Química y Ambiental |
Fecha de publicación | 2015-05-28 |
Fecha de depósito | 2016-11-24 |
Publicado en |
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Resumen | Germanium recovery from coal fly ash by hydrometallurgical procedures was
studied at the pilot scale (5 kg of fly ash/h). Results were used to design the equipment of a
demonstration-sized plant (200 kg of fly ash/h). ... Germanium recovery from coal fly ash by hydrometallurgical procedures was studied at the pilot scale (5 kg of fly ash/h). Results were used to design the equipment of a demonstration-sized plant (200 kg of fly ash/h). The process is based on hydrometallurgical operations: firstly a germanium extraction from fly ash by leaching and a consequent Ge separation from the other elements present in the solution by solvent extraction procedures. Based on the experimental results, mass balances and McCabe-Thiele diagrams were applied to determine the number of steps of the solvent extraction stage. Different arrangements have been studied and a countercurrent process with three steps in extraction and six steps in elution was defined. A residence time of 5 min was fixed in both the extraction and elution stages. Volumetric ratios in extraction and stripping were: aqueous phase/organic phase = 5 and organic phase/stripping phase = 5, so a concentration factor of 25 is achieved. Mixers and decanters were completely defined. The maximum extracted and eluted germanium was estimated and a global efficiency of 94% was achieved. The cost-effectiveness of the equipment was estimated using the Lang factors. |
Cita | Arroyo Torralvo, F., Fernández-Pereira, C. y Bermejo, P. (2015). Demonstration Plant Equipment Design and Scale-Up from Pilot Plant of a Leaching and Solvent Extraction Process. Minerals, 5 (2), 298-313. |
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