Precious Metal Distributions Between Copper Matte and Slag at High PSO2 in WEEE Reprocessing

Min Chen; Katri Avarmaa; Lassi Klemettinen; Hugh O’Brien; Junjie Shi; Pekka Taskinen; Daniel Lindberg; Ari Jokilaakso

doi:10.1007/s11663-021-02059-z

Precious Metal Distributions Between Copper Matte and Slag at High PSO2 in WEEE Reprocessing

Min Chen, Katri Avarmaa, Lassi Klemettinen, Hugh O’Brien, Junjie Shi, Pekka Taskinen, Daniel Lindberg, Ari Jokilaakso^*

^*Corresponding author for this work

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

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Abstract

The distributions of precious metals (gold, silver, platinum, and palladium) between copper matte and silica-saturated FeO_x-SiO₂/FeO_x-SiO₂-Al₂O₃/FeO_x-SiO₂-Al₂O₃-CaO slags were investigated at 1300 °C and PSO2 = 0.5 atm. The experiments were carried out in silica crucibles under flowing CO-CO₂-SO₂-Ar gas atmosphere. The concentrations of precious metals in matte and slag were analyzed by Electron Probe X-ray Microanalysis and Laser Ablation-High-Resolution Inductively Coupled Plasma-Mass Spectrometry, respectively. The precious metal concentrations in matte and slag, as well as the distribution coefficients of precious metals between matte and slag, were displayed as a function of matte grade. The present results obtained at PSO2 of 0.5 atm were compared with previous results at PSO2 of 0.1 atm for revealing the effects of PSO2 and selected slag modifiers (CaO and Al₂O₃) on precious metal distributions at copper matte smelting conditions. The present results also contribute experimental thermodynamic data of precious metal distributions in pyrometallurgical reprocessing of electronic waste via copper smelting processes.

Original language	English
Pages (from-to)	871-882
Number of pages	12
Journal	Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
Volume	52
Issue number	2
Early online date	25 Feb 2021
DOIs	https://doi.org/10.1007/s11663-021-02059-z
Publication status	Published - Apr 2021
MoE publication type	A1 Journal article-refereed

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title = "Precious Metal Distributions Between Copper Matte and Slag at High PSO2 in WEEE Reprocessing",

abstract = "The distributions of precious metals (gold, silver, platinum, and palladium) between copper matte and silica-saturated FeOx-SiO2/FeOx-SiO2-Al2O3/FeOx-SiO2-Al2O3-CaO slags were investigated at 1300 °C and PSO2 = 0.5 atm. The experiments were carried out in silica crucibles under flowing CO-CO2-SO2-Ar gas atmosphere. The concentrations of precious metals in matte and slag were analyzed by Electron Probe X-ray Microanalysis and Laser Ablation-High-Resolution Inductively Coupled Plasma-Mass Spectrometry, respectively. The precious metal concentrations in matte and slag, as well as the distribution coefficients of precious metals between matte and slag, were displayed as a function of matte grade. The present results obtained at PSO2 of 0.5 atm were compared with previous results at PSO2 of 0.1 atm for revealing the effects of PSO2 and selected slag modifiers (CaO and Al2O3) on precious metal distributions at copper matte smelting conditions. The present results also contribute experimental thermodynamic data of precious metal distributions in pyrometallurgical reprocessing of electronic waste via copper smelting processes.",

author = "Min Chen and Katri Avarmaa and Lassi Klemettinen and Hugh O{\textquoteright}Brien and Junjie Shi and Pekka Taskinen and Daniel Lindberg and Ari Jokilaakso",

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Chen, M, Avarmaa, K, Klemettinen, L, O’Brien, H, Shi, J, Taskinen, P , Lindberg, D & Jokilaakso, A 2021, 'Precious Metal Distributions Between Copper Matte and Slag at High PSO2 in WEEE Reprocessing', Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science, vol. 52, no. 2, pp. 871-882. https://doi.org/10.1007/s11663-021-02059-z

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AU - Chen, Min

AU - Avarmaa, Katri

AU - Klemettinen, Lassi

AU - O’Brien, Hugh

AU - Shi, Junjie

AU - Taskinen, Pekka

AU - Lindberg, Daniel

AU - Jokilaakso, Ari

PY - 2021/4

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AB - The distributions of precious metals (gold, silver, platinum, and palladium) between copper matte and silica-saturated FeOx-SiO2/FeOx-SiO2-Al2O3/FeOx-SiO2-Al2O3-CaO slags were investigated at 1300 °C and PSO2 = 0.5 atm. The experiments were carried out in silica crucibles under flowing CO-CO2-SO2-Ar gas atmosphere. The concentrations of precious metals in matte and slag were analyzed by Electron Probe X-ray Microanalysis and Laser Ablation-High-Resolution Inductively Coupled Plasma-Mass Spectrometry, respectively. The precious metal concentrations in matte and slag, as well as the distribution coefficients of precious metals between matte and slag, were displayed as a function of matte grade. The present results obtained at PSO2 of 0.5 atm were compared with previous results at PSO2 of 0.1 atm for revealing the effects of PSO2 and selected slag modifiers (CaO and Al2O3) on precious metal distributions at copper matte smelting conditions. The present results also contribute experimental thermodynamic data of precious metal distributions in pyrometallurgical reprocessing of electronic waste via copper smelting processes.

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JF - Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science

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Precious Metal Distributions Between Copper Matte and Slag at High PSO2 in WEEE Reprocessing

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Precious Metal Distributions Between Copper Matte and Slag at High PSO2 in WEEE Reprocessing

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