Reduction roasting and bioleaching of a limonite ore.

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.creatorOliveira, Víctor de Andrade Alvarenga-
Autor(es): dc.creatorRodrigues, Michael Leonardo Marques-
Autor(es): dc.creatorLeão, Versiane Albis-
Data de aceite: dc.date.accessioned2025-08-21T16:01:32Z-
Data de disponibilização: dc.date.available2025-08-21T16:01:32Z-
Data de envio: dc.date.issued2021-12-20-
Data de envio: dc.date.issued2021-12-20-
Data de envio: dc.date.issued2020-
Fonte completa do material: dc.identifierhttp://www.repositorio.ufop.br/jspui/handle/123456789/14275-
Fonte completa do material: dc.identifierhttps://www.sciencedirect.com/science/article/abs/pii/S0304386X21000037-
Fonte completa do material: dc.identifierhttps://doi.org/10.1016/j.hydromet.2021.105554-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1030270-
Descrição: dc.descriptionTwo of the main challenges presented by the implementation of nickel laterites atmospheric acid leaching are: (i) high acid consumption and (ii) high final iron concentrations in the PLS. In the current work, a novel process was devised by applying pyrometallurgical and bio-hydrometallurgical operations. The experimental set-up comprised the reduction of a nickel limonitic ore with hydrogen gas in a rotary kiln, at 900 ◦C, until all the goethite was converted to metallic iron. Subsequently, the reduced sample was bioleached by mesophilic microorganisms grown on Fe2+ (Acidithiobacillus ferrooxidans) at 5% solids, 32 ◦C, and pH < 3. The results showed that an increase in the Eh values, promoted by the bacteria, resulted in the leaching Fe, Ni and Co, therefore a dissolution of 92% of the nickel and 35% of the cobalt was observed in experiments carried out with 35 Kg H2SO4/(ton of the reduced ore). The iron concentration in the liquor generated under these experimental conditions was below 5 mg/L owing to the fact that Fe3+ precipitated as jarosite. The experimental conditions applied also resulted in low acid consumption and the final total iron concentration was also reduced in the leach liquor (< 200 mg/L), which were considerably lower than the values reported for the HPAL process.-
Formato: dc.formatapplication/pdf-
Idioma: dc.languageen-
Direitos: dc.rightsrestrito-
Palavras-chave: dc.subjectLimonite ore-
Palavras-chave: dc.subjectReduction by hydrogen-
Palavras-chave: dc.subjectNickel bioleaching-
Palavras-chave: dc.subjectAcid consumption-
Título: dc.titleReduction roasting and bioleaching of a limonite ore.-
Aparece nas coleções:Repositório Institucional - UFOP

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