Bioleaching and chemical leaching as an integrated process in the zinc industry.

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.creatorSouza, Adelson Dias de-
Autor(es): dc.creatorPina, Pablo dos Santos-
Autor(es): dc.creatorLeão, Versiane Albis-
Data de aceite: dc.date.accessioned2019-11-06T13:34:45Z-
Data de disponibilização: dc.date.available2019-11-06T13:34:45Z-
Data de envio: dc.date.issued2015-05-26-
Data de envio: dc.date.issued2015-05-26-
Data de envio: dc.date.issued2007-
Fonte completa do material: dc.identifierhttp://www.repositorio.ufop.br/handle/123456789/5545-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/558555-
Descrição: dc.descriptionThis 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.-
Idioma: dc.languageen-
Direitos: dc.rightsO Periódico Minerals Engineering concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3614250157215.-
Palavras-chave: dc.subjectBioleaching-
Palavras-chave: dc.subjectSphalerite-
Palavras-chave: dc.subjectFerric iron-
Palavras-chave: dc.subjectFerrous iron-
Palavras-chave: dc.subjectZinc-
Título: dc.titleBioleaching and chemical leaching as an integrated process in the zinc industry.-
Aparece nas coleções:Repositório Institucional - UFOP

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