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

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

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)
5 Downloads (Pure)

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 PO=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 languageUndefined/Unknown
Pages (from-to)67–78
JournalMineral Processing and Extractive Metallurgy Review
Volume40
Issue number1
DOIs
Publication statusPublished - 2018
MoE publication typeA1 Journal article-refereed

Keywords

  • Gibbs energy
  • Thermal oxidation
  • Pyrometallurgical roasting

Cite this