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Effects of Stub Hole Button on Anode of Aluminum Reduction Cell

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Abstract

In China, a special anode design with a button in each stub hole is adopted by many smelters. To investigate the effects of the stub hole button on the anode, numerical simulations of the anode rodding process and the running process of the conventional anode without a stub hole button (design A) and the special design (design B) were conducted. In anode rodding, design B shows worse cooling capacity than design A, while the air gap of design B (0.39 mm to 0.94 mm) is larger than that of design A (0.3 mm to 0.45 mm). During the anode running process, the stub hole button could contact neither the cast iron nor the stub, and the anode voltage drop of design B is 26 mV larger than that of design A because the larger air gap deteriorates the cast iron–carbon contact. In conclusion, the stub hole button should be removed.

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Acknowledgements

The authors appreciate financial support provided by the National Natural Science Foundation of China (Nos. 51804071, 51434005, 51874086, 51804069, and 51529401) and the Fundamental Research Funds for the Central Universities (Nos. N162502002, N2025024, N2025033).

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Authors and Affiliations

  1. Key Laboratory of Ecological Metallurgy of Multimetallic Mineral (Northeastern University), Ministry of Education, Shenyang, 110819, Liaoning, China

    Tuofu Li, Wenju Tao, Zhaowen Wang, Xiaozhen Liu & Youjian Yang

  2. School of Metallurgy, Northeastern University, Shenyang, 110819, Liaoning, China

    Tuofu Li, Wenju Tao, Zhaowen Wang, Xiaozhen Liu & Youjian Yang

  3. NSERC/Alcoa Industrial Research Chair MACE3 and Aluminium Research Centre - REGAL, Laval University, Quebec City, QC, G1V 0A6, Canada

    Hicham Chaouki & Mario Fafard

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  1. Tuofu Li
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  2. Wenju Tao
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Li, T., Tao, W., Chaouki, H. et al. Effects of Stub Hole Button on Anode of Aluminum Reduction Cell. JOM 72, 2426–2435 (2020). https://doi.org/10.1007/s11837-020-04162-z

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