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)

Research output: Contribution to journalArticleScientificpeer-review

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.

Original languageEnglish
JournalMineral Processing and Extractive Metallurgy: Transactions of the Institute of Mining and Metallurgy
DOIs
Publication statusE-pub ahead of print - 29 Sep 2019
MoE publication typeA1 Journal article-refereed

Fingerprint

Nickel
Leaching
Copper
nickel
Anodes
Dissolution
dissolution
leaching
copper
Metal refineries
Acidity
Oxides
Byproducts
acidity
Energy dispersive spectroscopy
scanning electron microscopy
oxide
Scanning electron microscopy
liquid
Liquids

Keywords

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

Cite this

Mohanty, Udit S. ; Kalliomäki, Taina ; Seisko, Sipi ; Peng, Chao ; Rintala, Lotta ; Halli, Petteri ; Aromaa, Jari ; Taskinen, Pekka ; Lundström, Mari. / Dissolution of copper and nickel from nickel-rich anode slimes under oxidized pressure leaching. In: Mineral Processing and Extractive Metallurgy: Transactions of the Institute of Mining and Metallurgy. 2019.
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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.",
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Dissolution of copper and nickel from nickel-rich anode slimes under oxidized pressure leaching. / Mohanty, Udit S.; Kalliomäki, Taina; Seisko, Sipi; Peng, Chao; Rintala, Lotta; Halli, Petteri; Aromaa, Jari; Taskinen, Pekka; Lundström, Mari (Corresponding Author).

In: Mineral Processing and Extractive Metallurgy: Transactions of the Institute of Mining and Metallurgy, 29.09.2019.

Research output: Contribution to journalArticleScientificpeer-review

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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

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Y1 - 2019/9/29

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