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During the copper electrowinningCopper electrowinning (EW) process, oxygen bubbles form on the anodeAnode and rupture at the air/solution interface releasing acid mistAcid mist detrimental to workers’ health and equipmentEquipment. Anti-mist agents, although effective, are often environmentally unfriendly with poorly understood suppression mechanismsSuppression mechanisms. In the present study, we measured and characterized the physical–chemical properties (density, surface tension, viscosityViscosity) of the electrowinningElectrowinning solution, particularly considering the effects of surfactantSurfactant addition and temperature. Test results show that increasing temperature impacts EW solution by decreasing surface tension, viscosityViscosity, and density of EW solution. The addition of FC-1100 decreases surface tension, increases viscosityViscosity and increases density. The findings of the present work not only clarify the mechanisms of acid mistAcid mist formationFormation and suppression but additionally help with the search for and application of an environmentally friendly anti-mist agent for copper electrowinningCopper electrowinning.

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Advancements in Understanding Acid Mist Generation and Mitigation in Copper Electrowinning

  • 会议论文

  • 发表日期：

    2025年

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  • Therese Roa,
  • Jinhong Zhang

摘要

During the copper electrowinningCopper electrowinning (EW) process, oxygen bubbles form on the anodeAnode and rupture at the air/solution interface releasing acid mistAcid mist detrimental to workers’ health and equipmentEquipment. Anti-mist agents, although effective, are often environmentally unfriendly with poorly understood suppression mechanismsSuppression mechanisms. In the present study, we measured and characterized the physical–chemical properties (density, surface tension, viscosityViscosity) of the electrowinningElectrowinning solution, particularly considering the effects of surfactantSurfactant addition and temperature. Test results show that increasing temperature impacts EW solution by decreasing surface tension, viscosityViscosity, and density of EW solution. The addition of FC-1100 decreases surface tension, increases viscosityViscosity and increases density. The findings of the present work not only clarify the mechanisms of acid mistAcid mist formationFormation and suppression but additionally help with the search for and application of an environmentally friendly anti-mist agent for copper electrowinningCopper electrowinning.