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

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: Fiseha Tesfaye, Dmitry Sukhomlinov, Daniel Lindberg, Mykola Moroz, Pekka Taskinen, Leena Hupa
Förläggare: Taylor & Francis
Publiceringsår: 2018
Tidskrift: Mineral Processing and Extractive Metallurgy Review
Volym: 40
Nummer: 1
Artikelns första sida, sidnummer: 67
Artikelns sista sida, sidnummer: 78
eISSN: 1547-7401


Abstrakt

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.


Nyckelord

Gibbs energy, Pyrometallurgical roasting, Thermal oxidation

Senast uppdaterad 2019-18-11 vid 04:09