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Loss behavior of Ni and Co during Al and Sc enri 2025 Transactions of Nonfer

Jian-cheng YU, Bao-zhong MA

2026enlaterite orenickelcobaltscandiumnitric acid leachingprecipitation

Abstract

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The loss pathways of Ni and Co during Al and Sc enrichment were analyzed in the HNO3 leach liquor of saprolitic laterite ore. Although over 99% of Al and Sc can be enriched, about 40% of Ni and Co are also lost. The adsorption of Al−Sc precipitate is an important cause of Ni and Co loss. Subsequently, the precipitation behavior of metal ions in different nitrate solutions was studied. The results confirm that Ni2+ and Co2+ do not hydrolyze to form their respective hydroxides. Ni2+, Co2+, and Mg2+ can form composite hydroxides with precipitated Al(OH)3, decreasing the pH at which Ni2+ and Co2+ begin to precipitate, causing their co-precipitation loss. A high Mg2+ concentration enhances the formation of these composite hydroxides. Finally, titration curves for different nitrate systems were determined, further demonstrating the formation of Me−Al composite hydroxides and revealing a formation trend of Mg−Al > Co−Al > Ni−Al.

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Cite This Work

@article{971a700f-20cb-49b2-9ff0-c41f3c79b470,
  title={Loss behavior of Ni and Co during Al and Sc enri 2025 Transactions of Nonfer},
  author={Jian-cheng YU and Bao-zhong MA},
  year={2026},
  language={en}
}
TY  - JOUR
TI  - Loss behavior of Ni and Co during Al and Sc enri 2025 Transactions of Nonfer
AU  - Jian-cheng YU
AU  - Bao-zhong MA
PY  - 2026
LA  - en
ER  -

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