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Zinc electrowinning faces challenges due to high power consumption from conventional lead-based anodes. Mixed metal oxide anodes offer a solution but are hindered by manganese ions in zinc electrolytes. This study explores a manganese removal strategy utilizing plant off-gas rich in SO2 with cobalt as a catalyst to address this issue. Real industrial solutions from CEZinc were tested, showing a remarkable reduction in manganese levels from 4500 to 10 mg/L within 120 minutes. However, the unintended removal of cobalt and other impurities underscores the necessity for an optimized purification strategy.

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Manganese Removal from Industrial Zinc Electrowinning Solution Using Plant Off-Gas Rich in SO2

  • 会议论文

  • 发表日期：

    2025年

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  • Fariba Mousavi,
  • Masoomeh Askarian,
  • Vincent Dufault-Bedard,
  • Georges Houlachi,
  • Houshang Alamdari

摘要

Zinc electrowinning faces challenges due to high power consumption from conventional lead-based anodes. Mixed metal oxide anodes offer a solution but are hindered by manganese ions in zinc electrolytes. This study explores a manganese removal strategy utilizing plant off-gas rich in SO2 with cobalt as a catalyst to address this issue. Real industrial solutions from CEZinc were tested, showing a remarkable reduction in manganese levels from 4500 to 10 mg/L within 120 minutes. However, the unintended removal of cobalt and other impurities underscores the necessity for an optimized purification strategy.