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Effect of coke properties and its blending recipe on performances of carbon anode for aluminium electrolysis

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Abstract

The properties and blending recipe of petroleum cokes used to make high quality carbon anodes for aluminium electrolysis were studied. Three kinds of green cokes were selected for bench scale study to illustrate the effects of cokes properties and its blending recipe on anode performances. The results show that impurities derived mainly from cokes remarkably affect the CO2 reactivity and air reactivity of carbon anodes. Ca, Na and V can increase CO2 reactivity of calcined cokes but S has the contrary effect, and the cokes of high V level generally present high air reactivity. The anodes with good quality can be made by properly selecting and scientifically blending of cokes, some poor quality cokes can also be used to produce high quality anodes with a reasonable blending recipe. Na contaminated anodes have high CO2 reactivity and air reactivity, so the recycled anode butts should be well cleaned to reduce Na content before being introduced into anode production, which is especially important to the low S cokes.

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Authors and Affiliations

  1. School of Metallurgical Science and Engineering, Central South University, Changsha, 410083, China

    Liu Feng-qin  (刘凤琴) (Professor) & Liu Ye-xiang  (刘业翔)

  2. Zhengzhou Research Institute, CHALCO, Zhengzhou, 450041, China

    Liu Feng-qin  (刘凤琴) (Professor)

  3. Mannweiler Consulting, Hadlaubstrasse 71, CH-8006, Zuerich, Switzerland

    Mannweiler U.

  4. R & D Carbon Ltd., P.O. Box 362, CH-3960, Sierre, Switzerland

    Perruchoud R.

Authors
  1. Liu Feng-qin  (刘凤琴)
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  2. Liu Ye-xiang  (刘业翔)
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  3. Mannweiler U.
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  4. Perruchoud R.
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Correspondence to Liu Feng-qin  (刘凤琴).

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Liu, Fq., Liu, Yx., Mannweiler, U. et al. Effect of coke properties and its blending recipe on performances of carbon anode for aluminium electrolysis. J Cent. South Univ. Technol. 13, 647–652 (2006). https://doi.org/10.1007/s11771-006-0009-5

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  • DOI: https://doi.org/10.1007/s11771-006-0009-5

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