| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Real Time Imaging
|
| Presentation Title |
In-Situ Observation of Magnetite Dissolution Into Cu2S-FeS Matte With Gas Generation |
| Author(s) |
Sakiko Kawanishi, Seung-Hwan Shin, Sohei Sukenaga, Junichi Takahashi, Hiroyuki Shibata |
| On-Site Speaker (Planned) |
Sakiko Kawanishi |
| Abstract Scope |
In copper smelting using flash furnaces, solid magnetite inhibits the absorption of suspended matte in slag into the matte phase, leading to copper loss. Therefore, rapid removal of magnetite by dissolution into Cu2S-FeS matte is desirable. In this study, the dissolution mechanism of magnetite was studied by in-situ observation of the magnetite/matte interface at high temperature. In-situ observations revealed that gas generation at the interface is inevitable for any matte composition. From the image analysis, we revealed that the dissolution of magnetite is governed by the mass transfer of oxygen in the matte phase. The obtained apparent mass transfer coefficient was on the order of 10-6 m/s, which is about one order of magnitude smaller than that reported for FeS without gas generation. Although only a small amount of the consumed magnetite contributes to gas generation, it significantly affects magnetite dissolution. |
| Proceedings Inclusion? |
Planned: |