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Flotation separation of chalcopyrite using acacia gum as a novel fine quartz depressant.

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Title: Flotation separation of chalcopyrite using acacia gum as a novel fine quartz depressant.
Authors: Nam, Hyojeong1 (AUTHOR), Mweene, Levie1,2 (AUTHOR) lmweene@gmail.com, Kim, Hyunjung1 (AUTHOR) kshjkim@hanyang.ac.kr
Source: Minerals Engineering. Nov2025, Vol. 233, pN.PAG-N.PAG. 1p.
Subjects: Chalcopyrite, Gum arabic, Flotation, Silica, Mineral processing, Zeta potential, Biological reagents, Copper mining
Abstract: [Display omitted] • Acacia gum is a potential depressant for the quartz-Zn system. • The grade and recovery of Cu was 24.7 % and 93.3 %, respectively, in presence of Zn. • Quartz-Zn and chalcopyrite zeta potentials decreased in presence of acacia gum. • DFT analyses of mineral-polymer complexes are provided. Recently, global carbon neutrality policies driven by climate change have heightened the demand for environmentally sustainable processes across various industries. This trend extends to the field of mineral processing, where the exploration of eco-friendly reagents, particularly for flotation processes, has emerged as a critical research focus. In this context, the present study aims to investigate, both experimentally and theoretically, the feasibility of using acacia gum (AG) as a depressant during the beneficiation of chalcopyrite from a synthetic siliceous low-grade copper ore. A higher AG adsorption onto chalcopyrite relative to quartz containing Zn (quartz-Zn) was noticed to decrease with increase in pH. Further, theoretical studies performed indicated that the complexation energies for chalcopyrite-AG and quartz-Zn-AG complexes were −346 kJ/mol and −272.6 kJ/mol and this is in tandem with the adsorption results. Additionally, the mineral-AG complexation resulted from partial covalent, conventional hydrogen bonding and other non-covalent interactions. Flotation studies conducted on chalcopyrite-quartz mixture with the weight ratio of 1:24 mimicking Mpanda Mineral Field siliceous ore, at pH 8.5 yielded Cu grade, recovery, separation efficiency and enrichment ratio of 24.7 %, 93.3 %, 92.3 % and 24.0, respectively, in presence of Zn, AG, potassium amyl xanthate, methyl isobutyl carbinol of 80 g/t, 200 g/t, 60 g/t and 25 g/t. The adsorption of AG onto activated quartz attests that the polysaccharide is a potential depressant for quartz in presence of Zn in siliceous ores. [ABSTRACT FROM AUTHOR]
Copyright of Minerals Engineering is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 187265066
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  Label: Title
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  Data: Flotation separation of chalcopyrite using acacia gum as a novel fine quartz depressant.
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  Data: <searchLink fieldCode="AR" term="%22Nam%2C+Hyojeong%22">Nam, Hyojeong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mweene%2C+Levie%22">Mweene, Levie</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> lmweene@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Kim%2C+Hyunjung%22">Kim, Hyunjung</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> kshjkim@hanyang.ac.kr</i>
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  Data: <searchLink fieldCode="JN" term="%22Minerals+Engineering%22">Minerals Engineering</searchLink>. Nov2025, Vol. 233, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Chalcopyrite%22">Chalcopyrite</searchLink><br /><searchLink fieldCode="DE" term="%22Gum+arabic%22">Gum arabic</searchLink><br /><searchLink fieldCode="DE" term="%22Flotation%22">Flotation</searchLink><br /><searchLink fieldCode="DE" term="%22Silica%22">Silica</searchLink><br /><searchLink fieldCode="DE" term="%22Mineral+processing%22">Mineral processing</searchLink><br /><searchLink fieldCode="DE" term="%22Zeta+potential%22">Zeta potential</searchLink><br /><searchLink fieldCode="DE" term="%22Biological+reagents%22">Biological reagents</searchLink><br /><searchLink fieldCode="DE" term="%22Copper+mining%22">Copper mining</searchLink>
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  Label: Abstract
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  Data: [Display omitted] • Acacia gum is a potential depressant for the quartz-Zn system. • The grade and recovery of Cu was 24.7 % and 93.3 %, respectively, in presence of Zn. • Quartz-Zn and chalcopyrite zeta potentials decreased in presence of acacia gum. • DFT analyses of mineral-polymer complexes are provided. Recently, global carbon neutrality policies driven by climate change have heightened the demand for environmentally sustainable processes across various industries. This trend extends to the field of mineral processing, where the exploration of eco-friendly reagents, particularly for flotation processes, has emerged as a critical research focus. In this context, the present study aims to investigate, both experimentally and theoretically, the feasibility of using acacia gum (AG) as a depressant during the beneficiation of chalcopyrite from a synthetic siliceous low-grade copper ore. A higher AG adsorption onto chalcopyrite relative to quartz containing Zn (quartz-Zn) was noticed to decrease with increase in pH. Further, theoretical studies performed indicated that the complexation energies for chalcopyrite-AG and quartz-Zn-AG complexes were −346 kJ/mol and −272.6 kJ/mol and this is in tandem with the adsorption results. Additionally, the mineral-AG complexation resulted from partial covalent, conventional hydrogen bonding and other non-covalent interactions. Flotation studies conducted on chalcopyrite-quartz mixture with the weight ratio of 1:24 mimicking Mpanda Mineral Field siliceous ore, at pH 8.5 yielded Cu grade, recovery, separation efficiency and enrichment ratio of 24.7 %, 93.3 %, 92.3 % and 24.0, respectively, in presence of Zn, AG, potassium amyl xanthate, methyl isobutyl carbinol of 80 g/t, 200 g/t, 60 g/t and 25 g/t. The adsorption of AG onto activated quartz attests that the polysaccharide is a potential depressant for quartz in presence of Zn in siliceous ores. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Minerals Engineering is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.mineng.2025.109624
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Chalcopyrite
        Type: general
      – SubjectFull: Gum arabic
        Type: general
      – SubjectFull: Flotation
        Type: general
      – SubjectFull: Silica
        Type: general
      – SubjectFull: Mineral processing
        Type: general
      – SubjectFull: Zeta potential
        Type: general
      – SubjectFull: Biological reagents
        Type: general
      – SubjectFull: Copper mining
        Type: general
    Titles:
      – TitleFull: Flotation separation of chalcopyrite using acacia gum as a novel fine quartz depressant.
        Type: main
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          Name:
            NameFull: Nam, Hyojeong
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            NameFull: Mweene, Levie
      – PersonEntity:
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            NameFull: Kim, Hyunjung
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          Dates:
            – D: 01
              M: 11
              Text: Nov2025
              Type: published
              Y: 2025
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              Value: 08926875
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              Value: 233
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            – TitleFull: Minerals Engineering
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