An experimental study on the phase equilibria of FeOx-saturated iron silicate slags and metallic copper alloys at 1200–1300 °C

Min Chen; Katri Avarmaa; Pekka Taskinen; Radoslaw Michallik; Ari Jokilaakso

doi:10.1016/j.calphad.2022.102418

An experimental study on the phase equilibria of FeO_x-saturated iron silicate slags and metallic copper alloys at 1200–1300 °C

Min Chen, Katri Avarmaa, Pekka Taskinen, Radoslaw Michallik, Ari Jokilaakso^*

^*Corresponding author for this work

Geological Survey of Finland

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

7 Citations (Scopus)

129 Downloads (Pure)

Abstract

The equilibrium phase relations between metallic copper alloys and magnetite/wüstite-saturated iron silicate slags were investigated at 1200–1300 °C and P_O2 of 10⁻¹⁰ to 10^−6.5 atm. The experiments involved high-temperature equilibration of samples in a controlled CO–CO₂ atmosphere, followed by rapid drop quenching and direct measurement of the phase composition using the electron probe microanalysis technique. The equilibrium compositions for the metal and slag phase at different temperatures were displayed as a function of P_O2. The present experimental results were compared with data from the literature as well as the thermodynamic assessment using MTDATA thermodynamic software. The present results contribute to the improvement of copper matte and black copper converting and slag cleaning processes.

Original language	English
Article number	102418
Number of pages	12
Journal	Calphad: Computer Coupling of Phase Diagrams and Thermochemistry
Volume	77
Early online date	5 Mar 2022
DOIs	https://doi.org/10.1016/j.calphad.2022.102418
Publication status	Published - Jun 2022
MoE publication type	A1 Journal article-refereed

Keywords

Copper smelting
Magnetite
Phase diagram
Resource efficiency
Wüstite

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.calphad.2022.102418Licence: CC BY

CHEM_Chen_et_al_An_experimental_study_2022_CalphadFinal published version, 10.6 MBLicence: CC BY

Cite this

@article{24698557a6174af58da7a89bfc22ca26,

title = "An experimental study on the phase equilibria of FeOx-saturated iron silicate slags and metallic copper alloys at 1200–1300 °C",

abstract = "The equilibrium phase relations between metallic copper alloys and magnetite/w{\"u}stite-saturated iron silicate slags were investigated at 1200–1300 °C and PO2 of 10−10 to 10−6.5 atm. The experiments involved high-temperature equilibration of samples in a controlled CO–CO2 atmosphere, followed by rapid drop quenching and direct measurement of the phase composition using the electron probe microanalysis technique. The equilibrium compositions for the metal and slag phase at different temperatures were displayed as a function of PO2. The present experimental results were compared with data from the literature as well as the thermodynamic assessment using MTDATA thermodynamic software. The present results contribute to the improvement of copper matte and black copper converting and slag cleaning processes.",

keywords = "Copper smelting, Magnetite, Phase diagram, Resource efficiency, W{\"u}stite",

author = "Min Chen and Katri Avarmaa and Pekka Taskinen and Radoslaw Michallik and Ari Jokilaakso",

note = "Funding Information: This work was financially supported by School of Chemical Engineering, Aalto University, and Business Finland funded SYMMET program (# 3891/31/2018). This study utilized the Academy of Finland's RawMatTERS Finland Infrastructure (RAMI) based at Aalto University, GTK in Espoo, and VTT in Espoo. Min Chen acknowledges the financial support from China Scholarship Council [grant number 201806370217] for funding his study and research in Finland. An anonymous reviewer for the constructive comments on the manuscript is greatly appreciated. The authors report no conflicts of interest. Funding Information: This work was financially supported by School of Chemical Engineering, Aalto University, and Business Finland funded SYMMET program (# 3891/31/2018 ). This study utilized the Academy of Finland's RawMatTERS Finland Infrastructure (RAMI) based at Aalto University, GTK in Espoo, and VTT in Espoo. Min Chen acknowledges the financial support from China Scholarship Council [grant number 201806370217 ] for funding his study and research in Finland. An anonymous reviewer for the constructive comments on the manuscript is greatly appreciated. The authors report no conflicts of interest. Publisher Copyright: {\textcopyright} 2022 The Authors",

year = "2022",

month = jun,

doi = "10.1016/j.calphad.2022.102418",

language = "English",

volume = "77",

journal = "Calphad: Computer Coupling of Phase Diagrams and Thermochemistry",

issn = "0364-5916",

publisher = "Elsevier",

}

TY - JOUR

T1 - An experimental study on the phase equilibria of FeOx-saturated iron silicate slags and metallic copper alloys at 1200–1300 °C

AU - Chen, Min

AU - Avarmaa, Katri

AU - Taskinen, Pekka

AU - Michallik, Radoslaw

AU - Jokilaakso, Ari

N1 - Funding Information: This work was financially supported by School of Chemical Engineering, Aalto University, and Business Finland funded SYMMET program (# 3891/31/2018). This study utilized the Academy of Finland's RawMatTERS Finland Infrastructure (RAMI) based at Aalto University, GTK in Espoo, and VTT in Espoo. Min Chen acknowledges the financial support from China Scholarship Council [grant number 201806370217] for funding his study and research in Finland. An anonymous reviewer for the constructive comments on the manuscript is greatly appreciated. The authors report no conflicts of interest. Funding Information: This work was financially supported by School of Chemical Engineering, Aalto University, and Business Finland funded SYMMET program (# 3891/31/2018 ). This study utilized the Academy of Finland's RawMatTERS Finland Infrastructure (RAMI) based at Aalto University, GTK in Espoo, and VTT in Espoo. Min Chen acknowledges the financial support from China Scholarship Council [grant number 201806370217 ] for funding his study and research in Finland. An anonymous reviewer for the constructive comments on the manuscript is greatly appreciated. The authors report no conflicts of interest. Publisher Copyright: © 2022 The Authors

PY - 2022/6

Y1 - 2022/6

N2 - The equilibrium phase relations between metallic copper alloys and magnetite/wüstite-saturated iron silicate slags were investigated at 1200–1300 °C and PO2 of 10−10 to 10−6.5 atm. The experiments involved high-temperature equilibration of samples in a controlled CO–CO2 atmosphere, followed by rapid drop quenching and direct measurement of the phase composition using the electron probe microanalysis technique. The equilibrium compositions for the metal and slag phase at different temperatures were displayed as a function of PO2. The present experimental results were compared with data from the literature as well as the thermodynamic assessment using MTDATA thermodynamic software. The present results contribute to the improvement of copper matte and black copper converting and slag cleaning processes.

AB - The equilibrium phase relations between metallic copper alloys and magnetite/wüstite-saturated iron silicate slags were investigated at 1200–1300 °C and PO2 of 10−10 to 10−6.5 atm. The experiments involved high-temperature equilibration of samples in a controlled CO–CO2 atmosphere, followed by rapid drop quenching and direct measurement of the phase composition using the electron probe microanalysis technique. The equilibrium compositions for the metal and slag phase at different temperatures were displayed as a function of PO2. The present experimental results were compared with data from the literature as well as the thermodynamic assessment using MTDATA thermodynamic software. The present results contribute to the improvement of copper matte and black copper converting and slag cleaning processes.

KW - Copper smelting

KW - Magnetite

KW - Phase diagram

KW - Resource efficiency

KW - Wüstite

UR - http://www.scopus.com/inward/record.url?scp=85125654287&partnerID=8YFLogxK

U2 - 10.1016/j.calphad.2022.102418

DO - 10.1016/j.calphad.2022.102418

M3 - Article

AN - SCOPUS:85125654287

SN - 0364-5916

VL - 77

JO - Calphad: Computer Coupling of Phase Diagrams and Thermochemistry

JF - Calphad: Computer Coupling of Phase Diagrams and Thermochemistry

M1 - 102418

ER -

An experimental study on the phase equilibria of FeO_x-saturated iron silicate slags and metallic copper alloys at 1200–1300 °C

Abstract

Keywords

UN SDGs

Access to Document

Other files and links

Fingerprint

SYMMET: Symbiosis of metals production and nature

Raw Materials Research Infrastructure

Cite this

An experimental study on the phase equilibria of FeOx-saturated iron silicate slags and metallic copper alloys at 1200–1300 °C

Abstract

Keywords

UN SDGs

Access to Document

Other files and links

Fingerprint

Projects

SYMMET: Symbiosis of metals production and nature

Equipment

Raw Materials Research Infrastructure

Cite this

An experimental study on the phase equilibria of FeO_x-saturated iron silicate slags and metallic copper alloys at 1200–1300 °C