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In seabed resources, pyritePyrite is often closely associated with chalcopyriteChalcopyrite, complicating selective separation due to the activation of pyritePyrite surfaces by dissolved copperCopper ions from chalcopyriteChalcopyrite. This activation promotes pyritePyrite flotationFlotation, making separation difficult and hindering effective beneficiation of seabed resources. This study aims to develop an environmentally friendly flotationFlotation process to selectively separate pyritePyrite and chalcopyriteChalcopyrite. Oxalic acidOxalic acid is proposed as an eco-friendly reagentEco-friendly reagent to prevent the flotationFlotation of copperCopper-activated pyritePyrite, facilitating selective chalcopyriteChalcopyrite recoveryRecovery. Laboratory-scale flotationFlotation tests using pure chalcopyriteChalcopyrite and pyritePyrite were conducted to evaluate the effectiveness of oxalic acidOxalic acid in depressing copperCopper-activated pyritePyrite. Results showed that oxalic acidOxalic acid selectively inhibited the flotationFlotation of pyritePyrite without affecting chalcopyriteChalcopyrite under mildly alkaline conditions. Artificial mixtures of chalcopyriteChalcopyrite and pyritePyrite were used to confirm the selective action of oxalic acidOxalic acid, and surface analysesAnalysis with infrared (IR) and X-ray photoelectron spectroscopy (XPS) revealed that oxalic acidOxalic acid reacts with copperCopper ions to form copperCopper oxalate, preventing copperCopper adsorptionAdsorption on pyritePyrite surfaces. This reduces pyritePyrite activation, blocking xanthate collectorCollector adsorptionAdsorption and promoting chalcopyriteChalcopyrite selectivity. These findings lay the groundwork for advancing a sustainable flotationFlotation process for seabed resource beneficiationSeabed resource beneficiation.

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Selective Depression of Copper-Activated Pyrite Using Oxalic Acid for Enhanced Chalcopyrite Flotation: Advancing Seabed Resource Beneficiation

  • 会议论文

  • 发表日期：

    2025年

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  • Gde Pandhe Wisnu Suyantara,
  • Akbarshokh Ulmaszoda,
  • Hajime Miki,
  • Doaa Ashraf Eladl,
  • Naoko Okibe

摘要

In seabed resources, pyritePyrite is often closely associated with chalcopyriteChalcopyrite, complicating selective separation due to the activation of pyritePyrite surfaces by dissolved copperCopper ions from chalcopyriteChalcopyrite. This activation promotes pyritePyrite flotationFlotation, making separation difficult and hindering effective beneficiation of seabed resources. This study aims to develop an environmentally friendly flotationFlotation process to selectively separate pyritePyrite and chalcopyriteChalcopyrite. Oxalic acidOxalic acid is proposed as an eco-friendly reagentEco-friendly reagent to prevent the flotationFlotation of copperCopper-activated pyritePyrite, facilitating selective chalcopyriteChalcopyrite recoveryRecovery. Laboratory-scale flotationFlotation tests using pure chalcopyriteChalcopyrite and pyritePyrite were conducted to evaluate the effectiveness of oxalic acidOxalic acid in depressing copperCopper-activated pyritePyrite. Results showed that oxalic acidOxalic acid selectively inhibited the flotationFlotation of pyritePyrite without affecting chalcopyriteChalcopyrite under mildly alkaline conditions. Artificial mixtures of chalcopyriteChalcopyrite and pyritePyrite were used to confirm the selective action of oxalic acidOxalic acid, and surface analysesAnalysis with infrared (IR) and X-ray photoelectron spectroscopy (XPS) revealed that oxalic acidOxalic acid reacts with copperCopper ions to form copperCopper oxalate, preventing copperCopper adsorptionAdsorption on pyritePyrite surfaces. This reduces pyritePyrite activation, blocking xanthate collectorCollector adsorptionAdsorption and promoting chalcopyriteChalcopyrite selectivity. These findings lay the groundwork for advancing a sustainable flotationFlotation process for seabed resource beneficiationSeabed resource beneficiation.