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

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Fiseha Tesfaye, Dmitry Sukhomlinov, Daniel Lindberg, Mykola Moroz, Pekka Taskinen, Leena Hupa
Publisher: Taylor & Francis
Publication year: 2018
Journal: Mineral Processing and Extractive Metallurgy Review
Volume number: 40
Issue number: 1
Start page: 67
End page: 78
eISSN: 1547-7401


Abstract

In this article, oxidation processes of
Ag-Bi-Sb-based phases were investigated. Synthesized AgBiS2 and AgSbS2-Sb2S3-Sb samples were
thermally analyzed in synthetic air by applying the simultaneous DSC-TGA
analysis technique. The oxidation processes at PO=0.2 atm and T<1173 K were observed to take place in many-step sequence
of various reactions with an overall reaction 2AgMeS2 + 5.5O2(g) ⇄ 2Ag + Me2O3 + 4SO2(g), where
Me=(Bi,Sb). Oxidations of AgBiS2, Sb2S3, and AgSbS2 were observed to begin above 549±2K, 610±2K, and
733±2K, respectively. Furthermore, oxidation processes of AgBi3S5 and Ag3SbS3 were estimated,
and thermodynamic functions for the overall oxidation reactions were calculated
and discussed.


Keywords

Gibbs energy, Pyrometallurgical roasting, Thermal oxidation

Last updated on 2019-19-08 at 06:41