Dissolution of copper and nickel from nickel-rich anode slimes under oxidized pressure leaching

Udit S. Mohanty; Taina Kalliomäki; Sipi Seisko; Chao Peng; Lotta Rintala; Petteri Halli; Jari Aromaa; Pekka Taskinen; Mari Lundström

doi:10.1080/25726641.2019.1670008

Dissolution of copper and nickel from nickel-rich anode slimes under oxidized pressure leaching

Udit S. Mohanty
, Taina Kalliomäki
, Sipi Seisko
, Chao Peng
, Lotta Rintala
, Petteri Halli
, Jari Aromaa
, Pekka Taskinen
, Mari Lundström^*

^*Corresponding author for this work

Aalto University

Research output: Contribution to journal › Article › Scientific › peer-review

3 Citations (Scopus)

Abstract

Anode slimes are valuable by-products in the electrolytic copper refinery process. This study aimed to investigate maximum extraction efficiency of Cu and Ni from slimes originating from the electrorefining of anodes containing high [Ni]. In addition, the extractions of Se, Te, As and Bi were determined. A factorial leaching series was conducted with T = 140–160°C, [H₂SO₄] = 12–20%, p_O2= 2–8 bars and solid/liquid ratio = 200–400 g/L. The highest Ni extraction of 99.7% was obtained with [H₂SO₄] = 20%, p_O2 = 8 bar and T = 160°C while maintaining S/L ratio of 200 g/L. The extraction of copper was found to be within 97–99% in all the leaching experiments. Increasing acidity and decreasing S/L ratio increased the efficiency of Cu extraction. Mineralogical characterizations by SEM-EDX demonstrated the presence of Ag₂Se, BaSO₄, PbSO₄ and several oxide phases in the leach residue.

Original language	English
Pages (from-to)	378-387
Journal	Mineral Processing and Extractive Metallurgy: Transactions of the Institute of Mining and Metallurgy
Volume	130
Issue number	4
Early online date	29 Sept 2019
DOIs	https://doi.org/10.1080/25726641.2019.1670008
Publication status	Published - 2021
MoE publication type	A1 Journal article-refereed

Funding

New-Eco project (grant EIT/RAW MATERIALS/SGA2017/1) of EIT Knowledge and Innovation Community Raw Materials consortium of EU, METSEK project funded by Association of Finnish Steel and Metal Producers, CMEco project (grant 7405/31/2016) funded by Business Finland and RawMATTERS Finland Infrastructure supported by Academy of Finland.

Keywords

Autoclave
copper electrorefining
extraction efficiency
hydrometallurgy
modelling
secondary metal sources
sulphuric acid leaching
valorization

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10.1080/25726641.2019.1670008

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Mohanty, U. S., Kalliomäki, T., Seisko, S., Peng, C., Rintala, L., Halli, P., Aromaa, J., Taskinen, P., & Lundström, M. (2021). Dissolution of copper and nickel from nickel-rich anode slimes under oxidized pressure leaching. Mineral Processing and Extractive Metallurgy: Transactions of the Institute of Mining and Metallurgy, 130(4), 378-387. https://doi.org/10.1080/25726641.2019.1670008

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title = "Dissolution of copper and nickel from nickel-rich anode slimes under oxidized pressure leaching",

abstract = "Anode slimes are valuable by-products in the electrolytic copper refinery process. This study aimed to investigate maximum extraction efficiency of Cu and Ni from slimes originating from the electrorefining of anodes containing high [Ni]. In addition, the extractions of Se, Te, As and Bi were determined. A factorial leaching series was conducted with T = 140–160°C, [H2SO4] = 12–20\%, pO2= 2–8 bars and solid/liquid ratio = 200–400 g/L. The highest Ni extraction of 99.7\% was obtained with [H2SO4] = 20\%, pO2 = 8 bar and T = 160°C while maintaining S/L ratio of 200 g/L. The extraction of copper was found to be within 97–99\% in all the leaching experiments. Increasing acidity and decreasing S/L ratio increased the efficiency of Cu extraction. Mineralogical characterizations by SEM-EDX demonstrated the presence of Ag2Se, BaSO4, PbSO4 and several oxide phases in the leach residue.",

keywords = "Autoclave, copper electrorefining, extraction efficiency, hydrometallurgy, modelling, secondary metal sources, sulphuric acid leaching, valorization",

author = "Mohanty, \{Udit S.\} and Taina Kalliom{\"a}ki and Sipi Seisko and Chao Peng and Lotta Rintala and Petteri Halli and Jari Aromaa and Pekka Taskinen and Mari Lundstr{\"o}m",

note = "Publisher Copyright: {\textcopyright} 2019 Institute of Materials, Minerals and Mining and The AusIMM Published by Taylor \& Francis on behalf of the Institute and The AusIMM.",

year = "2021",

doi = "10.1080/25726641.2019.1670008",

language = "English",

volume = "130",

pages = "378--387",

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Mohanty, US, Kalliomäki, T, Seisko, S, Peng, C, Rintala, L, Halli, P, Aromaa, J, Taskinen, P & Lundström, M 2021, 'Dissolution of copper and nickel from nickel-rich anode slimes under oxidized pressure leaching', Mineral Processing and Extractive Metallurgy: Transactions of the Institute of Mining and Metallurgy, vol. 130, no. 4, pp. 378-387. https://doi.org/10.1080/25726641.2019.1670008

Dissolution of copper and nickel from nickel-rich anode slimes under oxidized pressure leaching. / Mohanty, Udit S.; Kalliomäki, Taina; Seisko, Sipi et al.
In: Mineral Processing and Extractive Metallurgy: Transactions of the Institute of Mining and Metallurgy, Vol. 130, No. 4, 2021, p. 378-387.

Research output: Contribution to journal › Article › Scientific › peer-review

TY - JOUR

T1 - Dissolution of copper and nickel from nickel-rich anode slimes under oxidized pressure leaching

AU - Mohanty, Udit S.

AU - Kalliomäki, Taina

AU - Seisko, Sipi

AU - Peng, Chao

AU - Rintala, Lotta

AU - Halli, Petteri

AU - Aromaa, Jari

AU - Taskinen, Pekka

AU - Lundström, Mari

PY - 2021

Y1 - 2021

N2 - Anode slimes are valuable by-products in the electrolytic copper refinery process. This study aimed to investigate maximum extraction efficiency of Cu and Ni from slimes originating from the electrorefining of anodes containing high [Ni]. In addition, the extractions of Se, Te, As and Bi were determined. A factorial leaching series was conducted with T = 140–160°C, [H2SO4] = 12–20%, pO2= 2–8 bars and solid/liquid ratio = 200–400 g/L. The highest Ni extraction of 99.7% was obtained with [H2SO4] = 20%, pO2 = 8 bar and T = 160°C while maintaining S/L ratio of 200 g/L. The extraction of copper was found to be within 97–99% in all the leaching experiments. Increasing acidity and decreasing S/L ratio increased the efficiency of Cu extraction. Mineralogical characterizations by SEM-EDX demonstrated the presence of Ag2Se, BaSO4, PbSO4 and several oxide phases in the leach residue.

AB - Anode slimes are valuable by-products in the electrolytic copper refinery process. This study aimed to investigate maximum extraction efficiency of Cu and Ni from slimes originating from the electrorefining of anodes containing high [Ni]. In addition, the extractions of Se, Te, As and Bi were determined. A factorial leaching series was conducted with T = 140–160°C, [H2SO4] = 12–20%, pO2= 2–8 bars and solid/liquid ratio = 200–400 g/L. The highest Ni extraction of 99.7% was obtained with [H2SO4] = 20%, pO2 = 8 bar and T = 160°C while maintaining S/L ratio of 200 g/L. The extraction of copper was found to be within 97–99% in all the leaching experiments. Increasing acidity and decreasing S/L ratio increased the efficiency of Cu extraction. Mineralogical characterizations by SEM-EDX demonstrated the presence of Ag2Se, BaSO4, PbSO4 and several oxide phases in the leach residue.

KW - Autoclave

KW - copper electrorefining

KW - extraction efficiency

KW - hydrometallurgy

KW - modelling

KW - secondary metal sources

KW - sulphuric acid leaching

KW - valorization

UR - https://www.scopus.com/pages/publications/85073975373

U2 - 10.1080/25726641.2019.1670008

DO - 10.1080/25726641.2019.1670008

M3 - Article

AN - SCOPUS:85073975373

SN - 2572-6641

VL - 130

SP - 378

EP - 387

JO - Mineral Processing and Extractive Metallurgy: Transactions of the Institute of Mining and Metallurgy

JF - Mineral Processing and Extractive Metallurgy: Transactions of the Institute of Mining and Metallurgy

IS - 4

ER -

Dissolution of copper and nickel from nickel-rich anode slimes under oxidized pressure leaching

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