High-temperature oxidation of bismuth- and antimony-based sulfosalts

Fiseha Tesfaye; Dmitry Sukhomlinov; Daniel Lindberg; Mykola Moroz; Pekka Taskinen; Leena Hupa

doi:10.1080/08827508.2018.1481061

High-temperature oxidation of bismuth- and antimony-based sulfosalts

Fiseha Tesfaye, Dmitry Sukhomlinov, Daniel Lindberg, Mykola Moroz, Pekka Taskinen, Leena Hupa

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Abstract

In this article, oxidation processes ofAg-Bi-Sb-based phases were investigated. Synthesized AgBiS₂ and AgSbS₂-Sb₂S₃-Sb samples werethermally analyzed in synthetic air by applying the simultaneous DSC-TGAanalysis technique. The oxidation processes at P_O_₂=0.2 atm and T<1173 K were observed to take place in many-step sequenceof various reactions with an overall reaction 2AgMeS₂ + 5.5O₂(g) ⇄ 2Ag + Me₂O₃ + 4SO₂(g), whereMe=(Bi,Sb). Oxidations of AgBiS₂, Sb₂S₃, and AgSbS₂ were observed to begin above 549±2K, 610±2K, and733±2K, respectively. Furthermore, oxidation processes of AgBi₃S₅ and Ag₃SbS₃ were estimated,and thermodynamic functions for the overall oxidation reactions were calculatedand discussed.

Original language	Undefined/Unknown
Pages (from-to)	67–78
Journal	Mineral Processing and Extractive Metallurgy Review
Volume	40
Issue number	1
DOIs	https://doi.org/10.1080/08827508.2018.1481061
Publication status	Published - 2018
MoE publication type	A1 Journal article-refereed

Keywords

Gibbs energy
Thermal oxidation
Pyrometallurgical roasting

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10.1080/08827508.2018.1481061

Manuscript_Tesfaye.docxAccepted author manuscript, 7.72 MBLicence: Publisher rights policy

Cite this

@article{a7e819de1a6c4917ae2f2ebddae0a0ae,

title = "High-temperature oxidation of bismuth- and antimony-based sulfosalts",

abstract = "In this article, oxidation processes ofAg-Bi-Sb-based phases were investigated. Synthesized AgBiS2 and AgSbS2-Sb2S3-Sb samples werethermally analyzed in synthetic air by applying the simultaneous DSC-TGAanalysis technique. The oxidation processes at PO₂=0.2 atm and T<1173 K were observed to take place in many-step sequenceof various reactions with an overall reaction 2AgMeS2 + 5.5O2(g) ⇄ 2Ag + Me2O3 + 4SO2(g), whereMe=(Bi,Sb). Oxidations of AgBiS2, Sb2S3, and AgSbS2 were observed to begin above 549±2K, 610±2K, and733±2K, respectively. Furthermore, oxidation processes of AgBi3S5 and Ag3SbS3 were estimated,and thermodynamic functions for the overall oxidation reactions were calculatedand discussed.",

keywords = "Gibbs energy, Thermal oxidation, Pyrometallurgical roasting, Gibbs energy, Thermal oxidation, Pyrometallurgical roasting, Gibbs energy, Thermal oxidation, Pyrometallurgical roasting",

author = "Fiseha Tesfaye and Dmitry Sukhomlinov and Daniel Lindberg and Mykola Moroz and Pekka Taskinen and Leena Hupa",

year = "2018",

doi = "10.1080/08827508.2018.1481061",

language = "Odefinierat/ok{\"a}nt",

volume = "40",

pages = "67–78",

journal = "Mineral Processing and Extractive Metallurgy Review",

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number = "1",

}

TY - JOUR

T1 - High-temperature oxidation of bismuth- and antimony-based sulfosalts

AU - Tesfaye, Fiseha

AU - Sukhomlinov, Dmitry

AU - Lindberg, Daniel

AU - Moroz, Mykola

AU - Taskinen, Pekka

AU - Hupa, Leena

PY - 2018

Y1 - 2018

N2 - In this article, oxidation processes ofAg-Bi-Sb-based phases were investigated. Synthesized AgBiS2 and AgSbS2-Sb2S3-Sb samples werethermally analyzed in synthetic air by applying the simultaneous DSC-TGAanalysis technique. The oxidation processes at PO₂=0.2 atm and T<1173 K were observed to take place in many-step sequenceof various reactions with an overall reaction 2AgMeS2 + 5.5O2(g) ⇄ 2Ag + Me2O3 + 4SO2(g), whereMe=(Bi,Sb). Oxidations of AgBiS2, Sb2S3, and AgSbS2 were observed to begin above 549±2K, 610±2K, and733±2K, respectively. Furthermore, oxidation processes of AgBi3S5 and Ag3SbS3 were estimated,and thermodynamic functions for the overall oxidation reactions were calculatedand discussed.

AB - In this article, oxidation processes ofAg-Bi-Sb-based phases were investigated. Synthesized AgBiS2 and AgSbS2-Sb2S3-Sb samples werethermally analyzed in synthetic air by applying the simultaneous DSC-TGAanalysis technique. The oxidation processes at PO₂=0.2 atm and T<1173 K were observed to take place in many-step sequenceof various reactions with an overall reaction 2AgMeS2 + 5.5O2(g) ⇄ 2Ag + Me2O3 + 4SO2(g), whereMe=(Bi,Sb). Oxidations of AgBiS2, Sb2S3, and AgSbS2 were observed to begin above 549±2K, 610±2K, and733±2K, respectively. Furthermore, oxidation processes of AgBi3S5 and Ag3SbS3 were estimated,and thermodynamic functions for the overall oxidation reactions were calculatedand discussed.

KW - Gibbs energy

KW - Thermal oxidation

KW - Pyrometallurgical roasting

KW - Gibbs energy

KW - Thermal oxidation

KW - Pyrometallurgical roasting

KW - Gibbs energy

KW - Thermal oxidation

KW - Pyrometallurgical roasting

U2 - 10.1080/08827508.2018.1481061

DO - 10.1080/08827508.2018.1481061

M3 - Artikel

SN - 0882-7508

VL - 40

SP - 67

EP - 78

JO - Mineral Processing and Extractive Metallurgy Review

JF - Mineral Processing and Extractive Metallurgy Review

IS - 1

ER -