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Effect of ash on coal structure and combustibility

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Abstract

Four bituminous coals and one anthracite were used in this study. On the basis of the similar volatile matter contents of the four bituminous coals, the effects of ash in coal on the microstructure, carbonaceous structure, and chemical composition of pulverized coal were studied. Thermogravimetric analysis was used to study the effect of the addition of anthracite on the combustibility of four different bituminous coals. The results showed that with the increase of ash content in pulverized coal, the microstructure of carbon particles in coal was not much different. However, the analysis results of Raman spectroscopy and X-ray diffraction pattern showed that as the ash content increased, the degree of graphitization of coal carbonaceous structure gradually decreased. The combustibility of the four bituminous coals were better than that of the anthracite. When bituminous coal and anthracite were mixed and burned, the combustibility of the mixed sample decreased as the ash content increased.

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Acknowledgements

This work was financially supported by the Natural Science Foundation for Young Scientists of China (No. 51804026) and the Young Elite Scientists Sponsorship Program by China Association for Science and Technology (No. 2017QNRC001).

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Authors and Affiliations

  1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, China

    Xiao-jun Ning, Wang Liang, Jian-liang Zhang, Guang-wei Wang, Yan-jiang Li & Chun-he Jiang

  2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    Xiao-jun Ning, Wang Liang, Jian-liang Zhang, Guang-wei Wang, Yan-jiang Li & Chun-he Jiang

  3. School of Chemical Engineering, The University of Queensland, Brisbane, Queensland, 4072, Australia

    Jian-liang Zhang

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  1. Xiao-jun Ning
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  2. Wang Liang
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Correspondence to Guang-wei Wang.

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Ning, Xj., Liang, W., Zhang, Jl. et al. Effect of ash on coal structure and combustibility. Int J Miner Metall Mater 26, 973–982 (2019). https://doi.org/10.1007/s12613-019-1812-y

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  • DOI: https://doi.org/10.1007/s12613-019-1812-y

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