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Study on Spontaneous Combustion Tendency of Coals with Different Metamorphic Grade at Low Moisture Content Based on TPO-DSC

Author

Listed:
  • Jiuyuan Fan

    (College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao 266590, China)

  • Gang Wang

    (College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao 266590, China
    Mine Disaster Prevention and Control-Ministry of State Key Laboratory Breeding Base, Shandong University of Science and Technology, Qingdao 266590, China)

  • Jiuling Zhang

    (Hebei Province Key Laboratory of Mine Development and Safety Technology, North China University of Science and Technology, Tangshan 063210, China)

Abstract

In the environments of various open coal storage sites, mining-affected coalbeds, and goafs, etc., some coal bodies are often affected by external environmental factors. They are highly prone to spontaneous combustion in low moisture content (≤8%). In order to examine the effect of low moisture content on the spontaneous combustion tendency of coals with different metamorphic grade, we conducted a temperature programmed oxidation (TPO) experiment and differential scanning calorimetry (DSC) experiment to study the spontaneous combustion characteristics of coals with different metamorphic grade at four different low moisture contents. The change laws of the characteristic parameters of four different metamorphic grade coals at four different low moisture contents were comparatively analyzed. The experimental results indicate that: (1) Compared other low moisture content, anthracite and fat coal at a low moisture content of 1.2 % show a stronger tendency for spontaneous combustion, and long flame coal and lignite at a low moisture content of 3.4% and 5.6% are more prone to spontaneous combustion. (2) Four different metamorphic grade coals at a low moisture content of 7.8% are less prone to spontaneous combustion.

Suggested Citation

  • Jiuyuan Fan & Gang Wang & Jiuling Zhang, 2019. "Study on Spontaneous Combustion Tendency of Coals with Different Metamorphic Grade at Low Moisture Content Based on TPO-DSC," Energies, MDPI, vol. 12(20), pages 1-18, October.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:20:p:3890-:d:276520
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    References listed on IDEAS

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    1. Gang Wang & Yue Wang & Lulu Sun & Xiang Song & Qiqi Liu & Hao Xu & Wenzhou Du, 2018. "Study on the Low-Temperature Oxidation Law in the Co-Mining Face of Coal and Oil Shale in a Goaf—A Case Study in the Liangjia Coal Mine, China," Energies, MDPI, vol. 11(1), pages 1-16, January.
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    Cited by:

    1. Yuguo Wu & Yulong Zhang & Jie Wang & Xiaoyu Zhang & Junfeng Wang & Chunshan Zhou, 2020. "Study on the Effect of Extraneous Moisture on the Spontaneous Combustion of Coal and Its Mechanism of Action," Energies, MDPI, vol. 13(8), pages 1-17, April.
    2. Hua Wang & Wei Zhang & Haihui Xin & Deming Wang & Cuicui Di & Lu Liu, 2021. "Characteristics of Pyrolysis and Low Oxygen Combustion of Long Flame Coal and Reburning of Residues," Energies, MDPI, vol. 14(10), pages 1-17, May.

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