Flotation of Low Volatile Coking Coal Fines

  • Sumantra Bhattacharya
  • Divya Jyoti
  • Laxmikanta SahuEmail author
  • Shobhana Dey
  • Harish Singh
Technical Paper


Low volatile coking (LVC) coal reserves have become the key for sustaining the coking coal production in India. Because of high ash content and difficult washability characteristics coking coal in India is usually cleaned at 16–18% ash content. To obtain a reasonable yield at this ash level, LVC coal needs to be crushed to less than at least 13 mm before cleaning. LVC coal when crushed to −13 mm, depending on HGI and crushers used fines (−0.5 mm) could constitute 15–25% of the crushed coal. Limited study has so far been done on flotation characteristics of LVC coal fines, though flotation is the only method used in India to clean the coking coal fines. The work presented here after discusses the difficulties associated with the flotation of LVC coal fines arising out of its petrographic composition, complicated liberation characteristics, collector dependency, etc.


LVC coal Release analysis n-Dodecane Hydrophobicity Selectivity 


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Copyright information

© The Indian Institute of Metals - IIM 2016

Authors and Affiliations

  • Sumantra Bhattacharya
    • 1
  • Divya Jyoti
    • 1
  • Laxmikanta Sahu
    • 1
    Email author
  • Shobhana Dey
    • 2
  • Harish Singh
    • 1
    • 3
  1. 1.Department of Fuel and Mineral EngineeringIndian School of MinesDhanbadIndia
  2. 2.Mineral Processing DivisionCSIR-National Metallurgical LaboratoryJamshedpurIndia
  3. 3.All MineralKolkataIndia

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