About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
12th International Symposium on High Temperature Metallurgical Processing
|
Presentation Title |
Investigation of Bubble Penetration through Interface between Immiscible Liquids |
Author(s) |
Xiangfeng Cheng, Baojun Zhao, Fuming Zhang, Gele Qing, Zhixing Zhao |
On-Site Speaker (Planned) |
Xiangfeng Cheng |
Abstract Scope |
Abstract As an important source of copper losses to the slag, SO2 bubbles formed in the quiescent settlement zone of smelting furnace bring matte into slag phase through the immiscible matte-slag interface. The penetration and entrainment mechanisms of large bubbles were studied while the entrainment by micro bubbles was rarely investigated. In this paper, attachment of matte droplets to micro SO2 bubbles in the industrial smelting slags and laboratory samples have been confirmed by high temperature experiments. The bubble penetration behaviors through liquid-liquid interface were simulated by the cold model experiments using water and silicone oil. Results showed that fine gas bubbles can pass through the liquid-liquid interface and cause the heavier liquid entrainment. Although the critical bubble penetration size deduced in previous studies is inconsistent with the phenomenon observed in cold model experiments, it is an important parameter to classify the bubble entrainment regimes which is closely associated with the bubble penetration regimes. Greene’s theoretical derived values of critical bubble penetration and entrainment sizes are in good agreement but comparatively higher than the experimental results. The Weber numbers based on the critical bubble penetration size, heavier liquid density and interfacial tension under different experimental conditions are normally between 4 ~ 4.5. |
Proceedings Inclusion? |
Planned: |
Keywords |
Copper / Nickel / Cobalt, Iron and Steel, Phase Transformations |