High-Temperature Oxidation of Bismuth- and Antimony-Based Sulfosalts

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

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

In this article, oxidation processes of Ag-Bi-Sb-based phases were investigated. Synthesized AgBiS 2 and AgSbS 2 -Sb 2 S 3 -Sb samples were thermally analyzed in synthetic air by applying the simultaneous DSC-TGA analysis technique. The oxidation processes at P O₂ =0.2 atm and T<1173 K were observed to take place in many-step sequence of various reactions with an overall reaction 2AgMeS 2 + 5.5O 2 (g) ⇄ 2Ag + Me 2 O 3 + 4SO 2 (g), where Me=(Bi,Sb). Oxidations of AgBiS 2 , Sb 2 S 3 , and AgSbS 2 were observed to begin above 549±2K, 610±2K, and 733±2K, respectively. Furthermore, oxidation processes of AgBi 3 S 5 and Ag 3 SbS 3 were estimated, and thermodynamic functions for the overall oxidation reactions were calculated and discussed.

Original languageEnglish
Pages (from-to)67-78
Number of pages12
JournalMineral Processing and Extractive Metallurgy Review
Volume40
Issue number1
DOIs
Publication statusPublished - 2 Jan 2019
MoE publication typeA1 Journal article-refereed

Keywords

  • DSC-TGA analysis
  • Gibbs energy
  • Pyrometallurgical roasting
  • Thermal oxidation
  • AG-SB-S
  • SB2S3 OXIDATION
  • BINARY-SYSTEM
  • AGBI3S5
  • PHASE-EQUILIBRIA
  • SULFIDE
  • DISTRICT
  • KINETICS
  • X-RAY
  • DIFFRACTION

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