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<p>To ensure operational stability under renewable energy fluctuations, this study investigates the electrothermal response of aluminum electrolysis cells under 0%–20% current reduction. Using a coupled finite element model, we analyzed variations in temperature, electric fields, and ledge shape. Simulations revealed that a 10% current reduction causes excessive ledge growth (toe extension reaching 212&#xa0;cm), disrupting operations. Although modifying the electrolyte liquidus temperature mitigated ledge thickening, it compromised thermal insulation. Consequently, 84% of the rated current was identified as the safety threshold; below this limit, the core temperature drops below 900°C, risking process failure. This research offers a theoretical basis for optimizing “flexible power consumption” strategies in the aluminum industry.</p>

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Electric-Thermal Balance Characteristics of Aluminum Electrolysis Cells Under Power Restrictions

  • 期刊论文

  • 发表日期：

    2026年4月16日

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  • Jiakui Qin,
  • Yiwen Zhou,
  • Wanzhang Yang,
  • Yekai Zhang,
  • Hengwei Yan,
  • Zhanwei Liu

摘要

To ensure operational stability under renewable energy fluctuations, this study investigates the electrothermal response of aluminum electrolysis cells under 0%–20% current reduction. Using a coupled finite element model, we analyzed variations in temperature, electric fields, and ledge shape. Simulations revealed that a 10% current reduction causes excessive ledge growth (toe extension reaching 212 cm), disrupting operations. Although modifying the electrolyte liquidus temperature mitigated ledge thickening, it compromised thermal insulation. Consequently, 84% of the rated current was identified as the safety threshold; below this limit, the core temperature drops below 900°C, risking process failure. This research offers a theoretical basis for optimizing “flexible power consumption” strategies in the aluminum industry.