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

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

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

1 Citeringar (Scopus)
5 Nedladdningar (Pure)

Sammanfattning

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.

OriginalspråkOdefinierat/okänt
Sidor (från-till)67–78
TidskriftMineral Processing and Extractive Metallurgy Review
Volym40
Utgåva1
DOI
StatusPublicerad - 2018
MoE-publikationstypA1 Tidskriftsartikel-refererad

Nyckelord

  • Gibbs energy
  • Thermal oxidation
  • Pyrometallurgical roasting

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