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The Depression Effect of Micromolecular Depressant Containing Amino and Phosphonic Acid Group on Serpentine in the Flotation of Low-Grade Nickel Sulphide Ore

Chenxu Zhang, Wei Sun

2025Englishmineral processingbeneficiationcomminutionflotationphysical separationnickel sulphide ore

Abstract

Language:

Selective depression of serpentine remains a major challenge in the flotation of low-grade nickel sulphide ores because serpentine slimes impair concentrate grade and recovery. In this study, four structurally related micromolecular depressants bearing amino and phosphonic functionalities were designed, synthesized and systematically evaluated. Microflotation screening (depressant range: 0–20 mg ·L−1) and bench-scale tests identified an operational optimum near pH 9 and a reagent dosage of ≈18 mg·L−1; potassium butyl xanthate (PBX) was used as a collector and methyl isobutyl carbinol (MIBC) as a frother. Phosphonate-containing molecules (PMIDA and GLY) delivered the largest gains in pentlandite recovery and concentrate selectivity compared with carboxylate analogues and a benchmark depressant. Mechanistic studies (zeta potential, adsorption isotherms, FT-IR, and XPS) indicated that selective adsorption of amino and phosphonat.

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Cite This Work

@article{be1954f6-18bf-422d-9500-4b6ea66070cc,
  title={The Depression Effect of Micromolecular Depressant Containing Amino and Phosphonic Acid Group on Serpentine in the Flotation of Low-Grade Nickel Sulphide Ore},
  author={Chenxu Zhang and Wei Sun},
  year={2025},
  language={English}
}
TY  - JOUR
TI  - The Depression Effect of Micromolecular Depressant Containing Amino and Phosphonic Acid Group on Serpentine in the Flotation of Low-Grade Nickel Sulphide Ore
AU  - Chenxu Zhang
AU  - Wei Sun
PY  - 2025
LA  - English
ER  -

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