On the Kinetic Behavior of Recycling Precious Metals (Au, Ag, Pt, and Pd) Through Copper Smelting Process

Xingbang Wan; Lotta Kleemola; Lassi Klemettinen; Hugh O’Brien; Pekka Taskinen; Ari Jokilaakso

doi:10.1007/s40831-021-00388-6

On the Kinetic Behavior of Recycling Precious Metals (Au, Ag, Pt, and Pd) Through Copper Smelting Process

Xingbang Wan
, Lotta Kleemola
, Lassi Klemettinen
, Hugh O’Brien
, Pekka Taskinen
, Ari Jokilaakso^*

^*Corresponding author for this work

Geological Survey of Finland

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

20 Citations (Web of Science)

108 Downloads (Pure)

Abstract

The recycling and recovery of precious metals from secondary materials, such as waste-printed circuit boards, are an important area of circular economy research due to the limited existing resources and increasing amount of e-waste produced by the rapid development of technology. In this study, the kinetic behavior of precious metals Au, Ag, Pt, and Pd between copper matte and iron-silicate slag was investigated at a typical flash smelting temperature of 1300 °C in both air and argon atmospheres. SEM–EDS, EPMA, and LA-ICP-MS-advanced analysis methods were used for sample characterization. The results indicate that precious metals favor the matte phase over slag, and the deportment to matte occurred swiftly within a short time after the system had reached the experimental temperature. With increasing contact times, the precious metals were distributed increasingly into the sulfide matte. The distribution coefficients, based on experimentally measured element concentrations, followed the order of palladium > platinum > gold > silver in both air and argon, and the matte acted as an efficient collector of these precious metals. The obtained results can be applied to industrial copper matte smelting processes, and they also help in upgrading CFD models to simulate the flash smelting process more precisely.

Original language	English
Pages (from-to)	920-931
Number of pages	12
Journal	Journal of Sustainable Metallurgy
Volume	7
Issue number	3
Early online date	9 Jun 2021
DOIs	https://doi.org/10.1007/s40831-021-00388-6
Publication status	Published - Sept 2021
MoE publication type	A1 Journal article-refereed

Funding

This work was financially supported by the Aalto University School of Chemical Engineering and the Business Finland financed SYMMET project [Grant number 3891/31/2018]. Thanks to Outotec Research Center (Pori, Finland) for their contribution. This study utilized the Academy of Finland’s RawMatTERS Finland Infrastructure (RAMI) based jointly at Aalto University, GTK, and VTT in Espoo. Xingbang Wan would also like to acknowledge the financial support from the China Scholarship Council [Grant Number 201706370096].

Keywords

Distribution coefficients
Flash smelting
Iron-silicate slag
Recycling
WPCB

Access to Document

10.1007/s40831-021-00388-6Licence: CC BY

CHEM_Wan_et_al_On_the_Kinetic_Behavior_2021_Journal_of_Sustainable_MetallurgyFinal published version, 2.67 MBLicence: CC BY

Cite this

@article{823e64a365d844a78e9f78512a02a06a,

title = "On the Kinetic Behavior of Recycling Precious Metals (Au, Ag, Pt, and Pd) Through Copper Smelting Process",

abstract = "The recycling and recovery of precious metals from secondary materials, such as waste-printed circuit boards, are an important area of circular economy research due to the limited existing resources and increasing amount of e-waste produced by the rapid development of technology. In this study, the kinetic behavior of precious metals Au, Ag, Pt, and Pd between copper matte and iron-silicate slag was investigated at a typical flash smelting temperature of 1300 °C in both air and argon atmospheres. SEM–EDS, EPMA, and LA-ICP-MS-advanced analysis methods were used for sample characterization. The results indicate that precious metals favor the matte phase over slag, and the deportment to matte occurred swiftly within a short time after the system had reached the experimental temperature. With increasing contact times, the precious metals were distributed increasingly into the sulfide matte. The distribution coefficients, based on experimentally measured element concentrations, followed the order of palladium > platinum > gold > silver in both air and argon, and the matte acted as an efficient collector of these precious metals. The obtained results can be applied to industrial copper matte smelting processes, and they also help in upgrading CFD models to simulate the flash smelting process more precisely.",

keywords = "Distribution coefficients, Flash smelting, Iron-silicate slag, Recycling, WPCB",

author = "Xingbang Wan and Lotta Kleemola and Lassi Klemettinen and Hugh O{\textquoteright}Brien and Pekka Taskinen and Ari Jokilaakso",

note = "Funding Information: This work was financially supported by the Aalto University School of Chemical Engineering and the Business Finland financed SYMMET project [Grant number 3891/31/2018]. Thanks to Outotec Research Center (Pori, Finland) for their contribution. This study utilized the Academy of Finland{\textquoteright}s RawMatTERS Finland Infrastructure (RAMI) based jointly at Aalto University, GTK, and VTT in Espoo. Xingbang Wan would also like to acknowledge the financial support from the China Scholarship Council [Grant Number 201706370096]. Publisher Copyright: {\textcopyright} 2021, The Author(s).",

year = "2021",

month = sep,

doi = "10.1007/s40831-021-00388-6",

language = "English",

volume = "7",

pages = "920--931",

journal = "Journal of Sustainable Metallurgy",

issn = "2199-3823",

publisher = "Springer",

number = "3",

}

TY - JOUR

T1 - On the Kinetic Behavior of Recycling Precious Metals (Au, Ag, Pt, and Pd) Through Copper Smelting Process

AU - Wan, Xingbang

AU - Kleemola, Lotta

AU - Klemettinen, Lassi

AU - O’Brien, Hugh

AU - Taskinen, Pekka

AU - Jokilaakso, Ari

N1 - Funding Information: This work was financially supported by the Aalto University School of Chemical Engineering and the Business Finland financed SYMMET project [Grant number 3891/31/2018]. Thanks to Outotec Research Center (Pori, Finland) for their contribution. This study utilized the Academy of Finland’s RawMatTERS Finland Infrastructure (RAMI) based jointly at Aalto University, GTK, and VTT in Espoo. Xingbang Wan would also like to acknowledge the financial support from the China Scholarship Council [Grant Number 201706370096]. Publisher Copyright: © 2021, The Author(s).

PY - 2021/9

Y1 - 2021/9

N2 - The recycling and recovery of precious metals from secondary materials, such as waste-printed circuit boards, are an important area of circular economy research due to the limited existing resources and increasing amount of e-waste produced by the rapid development of technology. In this study, the kinetic behavior of precious metals Au, Ag, Pt, and Pd between copper matte and iron-silicate slag was investigated at a typical flash smelting temperature of 1300 °C in both air and argon atmospheres. SEM–EDS, EPMA, and LA-ICP-MS-advanced analysis methods were used for sample characterization. The results indicate that precious metals favor the matte phase over slag, and the deportment to matte occurred swiftly within a short time after the system had reached the experimental temperature. With increasing contact times, the precious metals were distributed increasingly into the sulfide matte. The distribution coefficients, based on experimentally measured element concentrations, followed the order of palladium > platinum > gold > silver in both air and argon, and the matte acted as an efficient collector of these precious metals. The obtained results can be applied to industrial copper matte smelting processes, and they also help in upgrading CFD models to simulate the flash smelting process more precisely.

AB - The recycling and recovery of precious metals from secondary materials, such as waste-printed circuit boards, are an important area of circular economy research due to the limited existing resources and increasing amount of e-waste produced by the rapid development of technology. In this study, the kinetic behavior of precious metals Au, Ag, Pt, and Pd between copper matte and iron-silicate slag was investigated at a typical flash smelting temperature of 1300 °C in both air and argon atmospheres. SEM–EDS, EPMA, and LA-ICP-MS-advanced analysis methods were used for sample characterization. The results indicate that precious metals favor the matte phase over slag, and the deportment to matte occurred swiftly within a short time after the system had reached the experimental temperature. With increasing contact times, the precious metals were distributed increasingly into the sulfide matte. The distribution coefficients, based on experimentally measured element concentrations, followed the order of palladium > platinum > gold > silver in both air and argon, and the matte acted as an efficient collector of these precious metals. The obtained results can be applied to industrial copper matte smelting processes, and they also help in upgrading CFD models to simulate the flash smelting process more precisely.

KW - Distribution coefficients

KW - Flash smelting

KW - Iron-silicate slag

KW - Recycling

KW - WPCB

UR - https://www.scopus.com/pages/publications/85107488398

U2 - 10.1007/s40831-021-00388-6

DO - 10.1007/s40831-021-00388-6

M3 - Article

AN - SCOPUS:85107488398

SN - 2199-3823

VL - 7

SP - 920

EP - 931

JO - Journal of Sustainable Metallurgy

JF - Journal of Sustainable Metallurgy

IS - 3

ER -

On the Kinetic Behavior of Recycling Precious Metals (Au, Ag, Pt, and Pd) Through Copper Smelting Process

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

SYMMET: Symbiosis of metals production and nature

Raw Materials Research Infrastructure

Cite this

On the Kinetic Behavior of Recycling Precious Metals (Au, Ag, Pt, and Pd) Through Copper Smelting Process

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Projects

SYMMET: Symbiosis of metals production and nature

Equipment

Raw Materials Research Infrastructure

Cite this