Recovery of Copper from Nickel Laterite Leach Waste by Chemical Reduction Using Sodium Dithionite

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Botelho Junior, A. B. ; Anes, I. A. ; Carvalho, M. A. ; Espinosa, D. C. R. ; Tenorio, J. A. S. ; Sun, Z ; Wang, C ; Guillen, DP ; Neelameggham, NR ; Zhang, L ; Howarter, JA ; Wang, T ; Olivetti, E ; Zhang, M ; Verhulst, D ; Guan, X ; Anderson, A ; Ikhmayies, S ; Smith, YR ; Pandey, A ; Pisupati, S ; Lu, H

• Tipo de documento: Artigo Científico
• Fonte: ENERGY TECHNOLOGY 2018: CARBON DIOXIDE MANAGEMENT AND OTHER TECHNOLOGIES; v. N/A, p. 6-pg., 2018-01-01.

Resumo

Recovery of metals from reserves with low grade and from waste with high presence of contamination is a challenge to be overcome. Metals like nickel, cobalt and copper could be recovery from nickel laterite leach waste by many different processes. Among recovery processes that could be applied are ion exchange, solvent extraction and precipitation. The aim of this work was recover copper from liquor of nickel laterite by precipitation using chemical reduction. Copper concentration in liquor was 146 mg L-1 and reducing agent used was sodium dithionite 1 mol L-1. Influence of stirring speed was studied between 0-200 rpm. Results indicated a selective precipitation of copper on solution with others metals at 240 mV. The analyzes were conducted in SEM, energy-dispersive X-ray spectroscopy and XRD, that indicated presence of copper and sulfur. (AU)

• Processo FAPESP: 16/05527-5 - Separação de metais a partir de líquor sulfúrico de resíduo de mineração utilizando resinas quelantes
• Beneficiário: Amilton Barbosa Botelho Junior
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 12/51871-9 - Estudo de novas tecnologias e rotas de processamento para o tratamento e reciclagem de resíduos sólidos
• Beneficiário: Jorge Alberto Soares Tenório
• Modalidade de apoio: Auxílio à Pesquisa - Temático