Arsenic Condensation and Reaction Mechanisms in Flash Smelting Off-Gas Line Conditions
Loading...
Access rights
openAccess
publishedVersion
URL
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
Date
2023-10
Major/Subject
Mcode
Degree programme
Language
en
Pages
11
Series
Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science, Volume 54, issue 5, pp. 2747-2757
Abstract
Arsenic is a common impurity element in sulfide concentrates. It tends to accumulate in the flue dust of smelting furnace due to the volatility and internal circulation of the flue dust practiced in the smelting-converting process chain. The only outlets for arsenic are anodes and discard slag. Arsenic condensation in dust-free conditions was studied below 800 °C where the gas atmosphere was controlled by SO2-air-N2 gas mixtures. Based on these experimental results, we confirm the kinetically constrained formation mechanism of the arsenic-containing dust, and its speciation into metallic, oxidic (III, V), and sulfidic species. The influences of temperature and atmosphere on the speciation of arsenic were compared with industrial data and discussed. Graphical Abstract: [Figure not available: see fulltext.]Condensed arsenic‐bearing particles collected by electrophoretic forces on the surface of fused SiO2 in SO2‐O2 atmospheres: the crystal morphology shows euhedrally facetted As2O3 crystals and initially molten As‐OSalloy droplets together with poorly crystallized AsS x particles.Description
Publisher Copyright: © 2023, The Author(s).
Keywords
Other note
Citation
Wan, X, Sukhomlinov, D, Taskinen, P, Lindgren, M, Michallik, R & Jokilaakso, A 2023, ' Arsenic Condensation and Reaction Mechanisms in Flash Smelting Off-Gas Line Conditions ', Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science, vol. 54, no. 5, pp. 2747-2757 . https://doi.org/10.1007/s11663-023-02871-9