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Performance of the Cathodes with Trapezoidal Protrusions in Aluminum Electrolysis Cells

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Abstract

Trapezoidal protrusions were added onto flat cathodes with the objective of enhancing the flow resistance to the metal in aluminum electrolysis cells. This design was tested for 8 months and proved to be effective in reducing cell voltage. Subsequently, trials revealed that when all the protrusions were widened, the energy consumption was barely influenced. Moreover, in the case of flat cathodes alternating with cathodes with widened protrusions, collector bars embedded in the flat cathodes took more current. In this paper, through finite element analysis, protrusions of various arrangements and widths were considered to estimate the current density and velocity in the metal.

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Acknowledgements

The authors are grateful for the financial support from the National Nature Science Foundation of China (Grant No. 51434005), the National Key Technology R&D Program of China (No. 2015BAB04B03) and the Fundamental research funds for the central universities (N15024013 and N162502002).

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Authors and Affiliations

  1. School of Metallurgy, Northeastern University, Shenyang, 110819, China

    Yang Song, Jianping Peng, Yuezhong Di, Yaowu Wang & Naixiang Feng

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  1. Yang Song
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  2. Jianping Peng
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  3. Yuezhong Di
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  4. Yaowu Wang
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  5. Naixiang Feng
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Correspondence to Jianping Peng.

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Song, Y., Peng, J., Di, Y. et al. Performance of the Cathodes with Trapezoidal Protrusions in Aluminum Electrolysis Cells. JOM 69, 2844–2850 (2017). https://doi.org/10.1007/s11837-017-2615-0

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  • DOI: https://doi.org/10.1007/s11837-017-2615-0

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