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Effects of Anode Wettability and Slots on Anodic Bubble Behavior Using Transparent Aluminium Electrolytic Cells

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Abstract

Transparent aluminum electrolytic cells were used to study the effects of anode wettability and slots on bubble behavior in a similar environment to that used in industrial cells. Observations were conducted using two types of transparent cells, one with side-observation and the other with a bottom-observation cell design. Anodic bubbles rising process in the side channel is strongly affected by the wettability of the anode. After rising a short distance, the bubbles detach from the anode vertical surface at good-wetting anode cases, while the bubbles still attach to the vertical surface at poor-wetting anode cases. Anode slots of width of 4 mm are able to prevent smaller bubbles from coalescing into larger bubbles and thus decrease the bubble size and gas coverage on the anode. Anode slots also make a contribution in slightly reducing bubble thickness. With the presence of slots, the bubble-induced cell voltage oscillation decreases as well.

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Acknowledgements

The authors would like to express their gratitude for the financial support by the National Natural Science Foundation of China (Grant Nos. 51322406, 51434005, 51474060, 51574070 and 51529401). Zhibin Zhao would also like to thank the China Scholarship Council (CSC) for a visiting PhD scholarship to CSIRO in Australia.

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Authors and Affiliations

  1. School of Metallurgy, Northeastern University, Mail Box 117, Shenyang, 110089, China

    Zhibin Zhao, Bingliang Gao, Yipeng Huang, Zhaowen Wang, Zhongning Shi & Xianwei Hu

  2. CSIRO Mineral Resources, Clayton, VIC, 3169, Australia

    Zhibin Zhao & Yuqing Feng

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  1. Zhibin Zhao
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  2. Bingliang Gao
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  3. Yuqing Feng
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  4. Yipeng Huang
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  5. Zhaowen Wang
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  7. Xianwei Hu
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Correspondence to Bingliang Gao.

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Zhao, Z., Gao, B., Feng, Y. et al. Effects of Anode Wettability and Slots on Anodic Bubble Behavior Using Transparent Aluminium Electrolytic Cells. JOM 69, 281–291 (2017). https://doi.org/10.1007/s11837-016-1999-6

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  • DOI: https://doi.org/10.1007/s11837-016-1999-6

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