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In recent years, many smeltersSmelter have tried various measures to reduce cell voltage, aiming to reduce energy consumptionEnergy consumption. Decreasing ACD is a crucial aspect of these efforts, but when ACD is reduced to a certain level, the Magneto-Hydro-Dynamic (MHDMagneto-Hydro-Dynamic (MHD)) stability becomes a key factor in energy efficiencyEnergy efficiency. This paper introduces a simulationSimulation model for transient MHD stabilityMHD stability disturbances in cells. Based on the model, SAMI has successfully developed a technology for suppressing transient MHD stabilityMHD stability disturbances through upgrades and modifications of the cathode busbars. After applying this technology, the cells can resist various random transient disturbances at low ACD, demonstrating strong stability and maintaining high current efficiency. In addition, when one cell experiences current fluctuations, the impact on adjacent cells is significantly reduced compared to what was the case before applying this technology. This technology has been applied in several smeltersSmelter, showing current efficiency increase by 0.5% and DC power consumption reduction of 195 kWh/t-Al.

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Transient MHD Stability Disturbance Suppression Technology and Its Application in Aluminum Electrolysis Cells

  • 会议论文

  • 发表日期：

    2026年

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  • Qinsong Zhang,
  • Ye Kong,
  • Jinlong Hou,
  • Xuan Wang,
  • Yafeng Liu,
  • Michael Ren,
  • Hongwu Hu

摘要

In recent years, many smeltersSmelter have tried various measures to reduce cell voltage, aiming to reduce energy consumptionEnergy consumption. Decreasing ACD is a crucial aspect of these efforts, but when ACD is reduced to a certain level, the Magneto-Hydro-Dynamic (MHDMagneto-Hydro-Dynamic (MHD)) stability becomes a key factor in energy efficiencyEnergy efficiency. This paper introduces a simulationSimulation model for transient MHD stabilityMHD stability disturbances in cells. Based on the model, SAMI has successfully developed a technology for suppressing transient MHD stabilityMHD stability disturbances through upgrades and modifications of the cathode busbars. After applying this technology, the cells can resist various random transient disturbances at low ACD, demonstrating strong stability and maintaining high current efficiency. In addition, when one cell experiences current fluctuations, the impact on adjacent cells is significantly reduced compared to what was the case before applying this technology. This technology has been applied in several smeltersSmelter, showing current efficiency increase by 0.5% and DC power consumption reduction of 195 kWh/t-Al.