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The growing demandDemand for electric vehiclesElectric Vehicles (EVs) has significantly increased the need for Ni and Co, essential components in batteriesBattery. A novel hydrometallurgical processHydrometallurgical processes has been developed to selectively recover Ni and Co from Cu–Ni matteMatte containing approximately 71.3% Cu, 6.1% Ni, 0.2% Co, and minor impurities like Fe, primarily as sulfides. Selective atmospheric leachingLeaching with HCl and H2O2 was employed to extract Ni and Co, leaving most of Cu as a leach residue that can be a potential feedstock for Cu refinersFeedstock for Cu refiners. Residual Cu was removed by cementation, followed by precipitationPrecipitation to eliminate Fe and other impurities, achieving over 99% separation of Cu and Fe with minimal Ni loss (approximately 2%). In the final step, carbonation with Na2CO3 precipitated Ni as NiCO3NiCO3 under optimal conditions (pH 7.5, 60 °C), meeting battery materialBattery materials specifications.

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Selective Hydrometallurgical Separation of Ni and Co from Cu–Ni Matte for Battery Materials Production

  • 会议论文

  • 发表日期：

    2025年

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  • Janaka Jayamini Wijenayake,
  • Lana Alagha

摘要

The growing demandDemand for electric vehiclesElectric Vehicles (EVs) has significantly increased the need for Ni and Co, essential components in batteriesBattery. A novel hydrometallurgical processHydrometallurgical processes has been developed to selectively recover Ni and Co from Cu–Ni matteMatte containing approximately 71.3% Cu, 6.1% Ni, 0.2% Co, and minor impurities like Fe, primarily as sulfides. Selective atmospheric leachingLeaching with HCl and H2O2 was employed to extract Ni and Co, leaving most of Cu as a leach residue that can be a potential feedstock for Cu refinersFeedstock for Cu refiners. Residual Cu was removed by cementation, followed by precipitationPrecipitation to eliminate Fe and other impurities, achieving over 99% separation of Cu and Fe with minimal Ni loss (approximately 2%). In the final step, carbonation with Na2CO3 precipitated Ni as NiCO3NiCO3 under optimal conditions (pH 7.5, 60 °C), meeting battery materialBattery materials specifications.