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Effect of fine slime on lignite flotation: focusing on particle-bubble mineralization and separation kinetic.

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Title: Effect of fine slime on lignite flotation: focusing on particle-bubble mineralization and separation kinetic.
Authors: Zhang, Deke1,2,3 (AUTHOR), Li, Yunchang1,2,3 (AUTHOR), Li, Ao1,2,3 (AUTHOR), Avid, Budeebazar4 (AUTHOR), Xia, Yangchao1,2 (AUTHOR) xiayangchao2010@163.com, Xing, Yaowen1,2 (AUTHOR) cumtxyw@126.com, Gui, Xiahui1,2 (AUTHOR)
Source: International Journal of Coal Preparation & Utilization. 2026, Vol. 46 Issue 3, p659-678. 20p.
Subject Terms: *Flotation, *Slurry, *Clean coal technologies, *Colloids
Abstract: Lignite has a pronounced tendency to slime when in contact with water, generating substantial amounts of high-ash fine slime that adversely impact the quality of clean coal during flotation and lead to increased reagent consumption. This study systematically investigates the influence of desliming efficiency on the flotation performance of Shengli lignite, with desliming efficiencies of 0%, 20%, 40%, 60%, 80%, and 100% being examined. The results indicate that desliming significantly enhances flotation performance by improving slurry fluidity, reducing ash content, and promoting particle-bubble attachment. At 100% desliming efficiency, the clean coal yield increased from 38.48% to 56.12%, slurry viscosity decreased from 4.02 to 1.68 mPa·s, and the particle-bubble wrap angle improved from 60° to 146°, reflecting enhanced hydrophobicity and stronger adhesion. Flotation kinetics analysis demonstrated that a 20% desliming efficiency achieved the highest flotation rate constant (k = 2.2041) and optimal froth stability, characterized by a froth height of 14.3 cm and a decay time of 9.43 s. However, excessive desliming reduced froth stability and flotation rates. These findings underscore the critical role of desliming in optimizing flotation efficiency, offering practical insights for industrial processes, and supporting the sustainable utilization of lignite resources. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Header DbId: enr
DbLabel: Energy & Power Source
An: 192006230
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PubTypeId: academicJournal
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Effect of fine slime on lignite flotation: focusing on particle-bubble mineralization and separation kinetic.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Zhang%2C+Deke%22">Zhang, Deke</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Yunchang%22">Li, Yunchang</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Ao%22">Li, Ao</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Avid%2C+Budeebazar%22">Avid, Budeebazar</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xia%2C+Yangchao%22">Xia, Yangchao</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> xiayangchao2010@163.com</i><br /><searchLink fieldCode="AR" term="%22Xing%2C+Yaowen%22">Xing, Yaowen</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> cumtxyw@126.com</i><br /><searchLink fieldCode="AR" term="%22Gui%2C+Xiahui%22">Gui, Xiahui</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)
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  Label: Source
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Coal+Preparation+%26+Utilization%22">International Journal of Coal Preparation & Utilization</searchLink>. 2026, Vol. 46 Issue 3, p659-678. 20p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Flotation%22">Flotation</searchLink><br />*<searchLink fieldCode="DE" term="%22Slurry%22">Slurry</searchLink><br />*<searchLink fieldCode="DE" term="%22Clean+coal+technologies%22">Clean coal technologies</searchLink><br />*<searchLink fieldCode="DE" term="%22Colloids%22">Colloids</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Lignite has a pronounced tendency to slime when in contact with water, generating substantial amounts of high-ash fine slime that adversely impact the quality of clean coal during flotation and lead to increased reagent consumption. This study systematically investigates the influence of desliming efficiency on the flotation performance of Shengli lignite, with desliming efficiencies of 0%, 20%, 40%, 60%, 80%, and 100% being examined. The results indicate that desliming significantly enhances flotation performance by improving slurry fluidity, reducing ash content, and promoting particle-bubble attachment. At 100% desliming efficiency, the clean coal yield increased from 38.48% to 56.12%, slurry viscosity decreased from 4.02 to 1.68 mPa·s, and the particle-bubble wrap angle improved from 60° to 146°, reflecting enhanced hydrophobicity and stronger adhesion. Flotation kinetics analysis demonstrated that a 20% desliming efficiency achieved the highest flotation rate constant (k = 2.2041) and optimal froth stability, characterized by a froth height of 14.3 cm and a decay time of 9.43 s. However, excessive desliming reduced froth stability and flotation rates. These findings underscore the critical role of desliming in optimizing flotation efficiency, offering practical insights for industrial processes, and supporting the sustainable utilization of lignite resources. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1080/19392699.2025.2469797
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 20
        StartPage: 659
    Subjects:
      – SubjectFull: Flotation
        Type: general
      – SubjectFull: Slurry
        Type: general
      – SubjectFull: Clean coal technologies
        Type: general
      – SubjectFull: Colloids
        Type: general
    Titles:
      – TitleFull: Effect of fine slime on lignite flotation: focusing on particle-bubble mineralization and separation kinetic.
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            NameFull: Zhang, Deke
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            NameFull: Li, Yunchang
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          Name:
            NameFull: Li, Ao
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            NameFull: Avid, Budeebazar
      – PersonEntity:
          Name:
            NameFull: Xia, Yangchao
      – PersonEntity:
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            NameFull: Xing, Yaowen
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            NameFull: Gui, Xiahui
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            – D: 01
              M: 03
              Text: 2026
              Type: published
              Y: 2026
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              Value: 46
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            – TitleFull: International Journal of Coal Preparation & Utilization
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