Please use this identifier to cite or link to this item: http://www.repositorio.ufop.br/handle/123456789/5545
Title: Bioleaching and chemical leaching as an integrated process in the zinc industry.
Authors: Souza, Adelson Dias de
Pina, Pablo dos Santos
Leão, Versiane Albis
Keywords: Bioleaching
Sphalerite
Ferric iron
Ferrous iron
Zinc
Issue Date: 2007
Citation: SOUZA, A. D.; PINA, P. dos S.; LEÃO, V. A. Bioleaching and chemical leaching as an integrated process in the zinc industry. Minerals Engineering, v. 20, p. 591-599, 2007. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0892687506003220>. Acesso em: 09 abr. 2015.
Abstract: This work sought to integrate bioleaching and chemical leaching as a cost-effective process to treat zinc sulphides. The continuous bioleaching of a sphalerite concentrate, assaying 51.4% Zn, 1.9% Pb, 31.8% S and 9.0% Fe with mesophile iron and sulphur-oxidizing bacteria followed by chemical leaching of the bioleaching residue were assessed. In the bioleaching step, the first reactor was used to produce Fe(III) concentrations as high as 20 g/L. This solution was fed to the subsequent bioleaching reactors to oxidize sphalerite. It was possible to achieve 30% zinc extraction for 70 h residence time. In chemical leaching experiments, carried out with the residue of the bioleaching step, the effects Fetotal and acidity on zinc extraction were studied. It was noticed that Fe(III) concentrations over 12 g/L did not affect zinc recoveries. Furthermore, the higher the acidity, the larger the zinc recovery, for experiments carried out up to 181 g/L sulphuric acid. The results have demonstrated that it is possible to devise a new process capable of achieving 96% zinc extraction, similarly to the conventional roasting–leaching–electrolysis process.
URI: http://www.repositorio.ufop.br/handle/123456789/5545
metadata.dc.identifier.doi: https://doi.org/10.1016/j.mineng.2006.12.014
ISSN: 0892-6875
metadata.dc.rights.license: O periódico Minerals Engineering concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3614250157215.
Appears in Collections:DEMET - Artigos publicados em periódicos

Files in This Item:
File Description SizeFormat 
ARTIGO_BioleachingChemicalLeaching.pdf1,13 MBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.