Investigation of the presence of metallic phases in Brazilian tin-slags.

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorClemente, Daniel Mapa-
Autor(es): dc.creatorSilva, Carlos Antônio da-
Autor(es): dc.creatorPeixoto, Johne Jesus Mol-
Autor(es): dc.creatorOliveira, José Roberto de-
Autor(es): dc.creatorSouza, Raphael Mariano de-
Data de aceite: dc.date.accessioned2025-08-21T15:36:36Z-
Data de disponibilização: dc.date.available2025-08-21T15:36:36Z-
Data de envio: dc.date.issued2024-11-17-
Data de envio: dc.date.issued2024-11-17-
Data de envio: dc.date.issued2022-
Fonte completa do material: dc.identifierhttps://www.repositorio.ufop.br/handle/123456789/18986-
Fonte completa do material: dc.identifierhttps://doi.org/10.1016/j.jmrt.2023.04.251-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1019656-
Descrição: dc.descriptionThe supply chain of Sn presents social and environmental risks that could threaten the availability of cassiterite, while secondary materials, such as tin-slags, stand as an alter native source for smelters. In this context, this work investigated the presence of occluded metallic phases in Brazilian tin-slags. Chemical analyses of different slags revealed that this fact could be related to high ZrO2 levels, which was also supported by different ther modynamic studies. It was indicated that minor additions of CaO could diminish the melting temperature of these slags, contributing towards the precipitation of metallic prills. Smelting experiments were performed between 1773-1573K with a tin-slag concentrate using limestone as a fluxing agent. It was verified that metallic prills were mostly precipitated in the bottom of the crucible above 1673K. However, at 1573K, a mixture of metallic and oxidized phases was obtained, indicating that low working tem peratures lead to losses of Sn in the final slag as metallic inclusions. Further additions of limestone improved the coalescence but did not allow efficient precipitation of thes metallic prills. Temperature measurements were performed in a 150 kVA EAF during slag processing, and it was verified that tapping of metal/slag occurred partially below 1573K, justifying the presence of metallic prills in the studied slags. Therefore, an optimization of the process relies both on the dilution of ZrO2 content by a controlled addition of fluxing agents, as well as by an increase in working temperatures. Alternatively, magnetic sepa ration can be used to recover occluded metallic particles from final slags.-
Formato: dc.formatapplication/pdf-
Idioma: dc.languageen-
Direitos: dc.rightsaberto-
Direitos: dc.rightsThis is an open access article under the CC BY-NC-ND license (http:// creativecommons.org/licenses/by-nc-nd/4.0/). Fonte: PDF do artigo.-
Palavras-chave: dc.subjectTin recycling-
Palavras-chave: dc.subjectFeSn-
Palavras-chave: dc.subjectZrO2 slags-
Palavras-chave: dc.subjectBrazilian tin slags-
Título: dc.titleInvestigation of the presence of metallic phases in Brazilian tin-slags.-
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