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Effect of Heat on Organic and Inorganic Components in Some Non-coking Lower Gondwana Coals

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Abstract

The concentration of different maceral groups and minerals in coal influence the quality as each of them behaves differently during heat treatment. The purpose of this study is to know how these are behaving at different temperature conditions. Therefore, various macerals and minerals were concentrated by using heavy liquids of different specific gravities (1.3, 1.7 and 1.9). The generated density fractions were treated with heat at 400, 600, 800 and 1000 °C. All the density fractions at various temperature conditions along with feed sample were investigated by optical microscopy, X-ray diffractometry, electron-probe microanalysis and Fourier transform infrared spectroscopy analysis. The results suggest that fusinite and sclerotinite are the most stable macerals, whereas quartz is the most stable mineral. Telocollinite is found to be oxidized very prominently at 400 °C. Siderite and pyrite alter to form hematite above 400 °C and 800 °C, respectively. Kaolinite converts to metakaolin followed by mullite with increasing temperature.

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Acknowledgements

The authors are thankful to the Director, CSIR-IMMT, for permitting to publish this paper. We are also thankful to Dr. S. I. Angadi, Dr. B. K. Nayak and Dr. D. Satpathy of Mineral Processing Department for extending their support in the analytical work. The first author (R. Bhatta) is indebted to the University Grants Commission for the financial support in terms of the research fellowship.

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Authors and Affiliations

  1. Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India

    Rajesh Bhatta & Nilima Dash

  2. CSIR-Institute of Minerals and Materials Technology, Bhubaneswar, 751013, India

    Rajesh Bhatta, Nilima Dash & Bibhuranjan Nayak

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  1. Rajesh Bhatta
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  2. Nilima Dash
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  3. Bibhuranjan Nayak
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Correspondence to Nilima Dash.

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Bhatta, R., Dash, N. & Nayak, B. Effect of Heat on Organic and Inorganic Components in Some Non-coking Lower Gondwana Coals. Trans Indian Inst Met 74, 387–397 (2021). https://doi.org/10.1007/s12666-020-02168-4

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  • DOI: https://doi.org/10.1007/s12666-020-02168-4

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