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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Advanced Real Time Imaging
Presentation Title In-situ Observation of SO2 Gas Formation at the Magnetite/Matte Interface at 1200℃
Author(s) Seung-Hwan Shin, Sakiko Kawanishi, Sohei Sukenaga, Junichi Takahashi, Hiroyuki Shibata
On-Site Speaker (Planned) Seung-Hwan Shin
Abstract Scope The stagnation of solid magnetite at the interface between slag and matte (Cu2S-FeS) is one of the big issues in the copper smelting process using a flash furnace. The magnetite inhibits the absorption of the suspended matte in the slag phase into the matte phase, which leads to copper loss. Therefore, the rapid removal of the magnetite by the reaction with the matte can greatly contribute to reducing the copper loss. In this study, we aim to clarify the reaction behavior of the interface between magnetite/matte by in-situ observation through the magnetite thin film. The formation of SO2 gas bubbles was observed at the interface and the size of bubbles was decreased by the increase of FeS concentration in the matte. Furthermore, we clarified that the remained gases at the interface could be a factor that decreases the reaction rate between magnetite and matte.
Proceedings Inclusion? Planned:
Keywords Pyrometallurgy, Process Technology, Copper / Nickel / Cobalt


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In-situ Observation of SO2 Gas Formation at the Magnetite/Matte Interface at 1200℃
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