Method of protection of cathode blocks of aluminium electrolysis cells | Научно-инновационный портал СФУ

Method of protection of cathode blocks of aluminium electrolysis cells

Тип публикации: доклад, тезисы доклада, статья из сборника материалов конференций

Конференция: 1st Virtual European Conference on Fracture, VECF 2020

Год издания: 2020

Идентификатор DOI: 10.1016/j.prostr.2020.10.105

Ключевые слова: aluminium electrolysis cells, cathode blocks, protective coating, tib2

Аннотация: Cathode wear is one of the main lifetime limiting factors of an aluminium electrolysis cell. In the present work the composition of the wettable TiB2-based coating and the cost-effective method of its application to protect the most defenseless areas of the cell bottom are proposed in relation with the cathode blocks wear profile and failure mechanisms. The protective coating composition comprises a mixture of TiB2 powders with bimodal or multimodal grain size distribution (65-40 wt. %) and a water-soluble environmentally friendly binder (35-60 wt. %). The proposed TiB2-C protective coating is characterised by high adhesion to the cathode block material, as well as wear resistance, resistance to cracks initiation and their propagation, wettability by liquid aluminium. That leads to a contact electrical resistance decrease and an increase of a chemical resistance at the Al-TiB2-C interface. The developed method of the cathode blocks protection was tested in operating conditions on an industrial electrolysis cell. The expected lifetime of cathode blocks was increased at least for 4 mounts. The results are promising and show the efficiency of the proposed method for cathode blocks protection. © 2020 The Authors. Published by Elsevier B.V.

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Издание

Журнал: Procedia Structural Integrity

Выпуск журнала: Vol. 28

Номера страниц: 1340-1346

ISSN журнала: 24523216

Издатель: Elsevier B.V.

Авторы

  • Ogoreltceva N. (Siberian Federal University, 79, Svobodny Pr., Krasnoyarsk, 660041, Russian Federation)
  • Fedorova E. (Siberian Federal University, 79, Svobodny Pr., Krasnoyarsk, 660041, Russian Federation, Federal Research Center for Information and Computational Technologies, 53, Mira Str., Krasnoyarsk, 660049, Russian Federation)
  • Puzanov I. (OOO RUSAL Engineering-and-Technological Centre, 37/1, Pogranichnikov Str., Krasnoyarsk, 660067, Russian Federation)
  • Zavadyak A. (OOO RUSAL Engineering-and-Technological Centre, 37/1, Pogranichnikov Str., Krasnoyarsk, 660067, Russian Federation)
  • Nagibin G. (Siberian Federal University, 79, Svobodny Pr., Krasnoyarsk, 660041, Russian Federation)
  • Kirillova I. (Siberian Federal University, 79, Svobodny Pr., Krasnoyarsk, 660041, Russian Federation)

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