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Flotation of Low Volatile Coking Coal Fines

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Abstract

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.

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Author notes

  1. Harish Singh

    Present address: All Mineral, Kolkata, India

Authors and Affiliations

  1. Department of Fuel and Mineral Engineering, Indian School of Mines, Dhanbad, India

    Sumantra Bhattacharya, Divya Jyoti, Laxmikanta Sahu & Harish Singh

  2. Mineral Processing Division, CSIR-National Metallurgical Laboratory, Jamshedpur, India

    Shobhana Dey

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  1. Sumantra Bhattacharya
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  2. Divya Jyoti
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  3. Laxmikanta Sahu
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  4. Shobhana Dey
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Correspondence to Laxmikanta Sahu.

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Bhattacharya, S., Jyoti, D., Sahu, L. et al. Flotation of Low Volatile Coking Coal Fines. Trans Indian Inst Met 70, 421–432 (2017). https://doi.org/10.1007/s12666-016-0996-3

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