Tecnologia em Metalurgia, Materiais e Mineração
https://tecnologiammm.com.br/article/doi/10.4322/2176-1523.1392
Tecnologia em Metalurgia, Materiais e Mineração
Artigo Original

INFLUÊNCIA DO Fe(III) NO LIXIVIADO DE REJEITO DE NÍQUEL NO PROCESSO DE TROCA-IÔNICA

INFLUENCE OF Fe(III) IN LEACHING NICKEL TAILINGS ON ION EXCHANGE PROCESS

Amilton Barbosa Botelho Junior; Mónica Maria Jiménez Correa; Denise Crocce Romano Espinosa; Jorge Alberto Soares Tenório

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Resumo

mo Na lixiviação de um rejeito de níquel laterítico em ácido sulfúrico, o ferro na forma mais oxidada é o elemento presente em maior concentração, sendo que o mesmo precipita em pH acima de 2,00, arrastando outros metais (co-precipitação). O objetivo deste trabalho foi comparar a recuperação de metais no licor sintético com Fe(III) e outro com Fe(II). Realizando ensaios em batelada, foi possível verificar que a extração de cobre utilizando resina de troca-iônica foi de 48,72% no licor com Fe(III), enquanto que para o licor contendo Fe(II) foi de 61,32%, apesar de que a extração de ferro, em massa de íon/massa de resina, foi maior para Fe(II) do que para Fe(III). As análises foram feitas utilizando a técnica de Espectroscopia de raio X (EDX).

Palavras-chave

Mineração; Ferro; Hidrometalurgia; Resina quelante.

Abstract

In leaching of nickel laterite tailings with sulfuric acid, the iron on more oxidized form is the element present in greater quantity, being that it precipitate in pH above 2.00, with others metals (co-precipitation). The aim of this project was compare recovery of metals of synthetic liquor with Fe(III) and other with Fe(II). Batch experiments were realized, and it was possible verify that extraction of copper using ion exchange was 48.72% in liquor of Fe(III), while liquor with Fe(II) was 61.32%, in the meantime iron extraction, in mass of ion/mass of resin, was higher to Fe(II) liquor than Fe(III). Analyzes were realized using Energy-dispersive X-ray spectroscopy

Keywords

Mining; Iron; Hydrometallurgy; Chelating resin.

Referências

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Tecnol. Metal. Mater. Min.

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