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
N1 - Funding Information:
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. The authors express their deep gratitude to Petri Latostenmaa from Boliden Harjavalta for providing the raw material.
Publisher Copyright:
© 2019 Institute of Materials, Minerals and Mining and The AusIMM Published by Taylor & Francis on behalf of the Institute and The AusIMM.
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 - http://www.scopus.com/inward/record.url?scp=85073975373&partnerID=8YFLogxK
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 -