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Effect of Particle Sizes on the Physical and Mechanical Properties of Briquettes

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  • Longlong Pang

    (School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, Henan, China)

  • Yuzhong Yang

    (School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, Henan, China)

  • Liyun Wu

    (School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, Henan, China)

  • Fei Wang

    (School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, Henan, China)

  • Han Meng

    (School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, Henan, China)

Abstract

The particle size of coal particles is an important factor affecting the physical and mechanical properties of coal. In this study, uniaxial and triaxial compression tests were conducted to investigate the effects of coal particle size on the physical and mechanical properties of briquettes and their impact mechanism using a rock mechanics test-150B servo system (RMT-150B). The results showed that the uniaxial compression strength, elastic modulus and deformation modulus of briquettes increase when particle size is decreased. The deformation characteristics of the briquettes directly prepared by raw tectonic coal were similar to those of coal specimens with a particle size of 0.18–0.25 mm. The cohesion and strength of coal specimens increased when particle size was decreased, and the plastic deformation capacity decreased when particle size was decreased, showing a strong correlation. The f briquette directly prepared by the raw tectonic coal had a strength between that of coal specimens with a particle size of 2–6 mm and those with a particle size of 0.18–0.25 mm. The mechanical properties of briquettes mainly depend on the meshing force between the coal particles. The smaller the particles, the greater the mechanical meshing force. The “floating particles”, generated in the voids between coal particles during the preparation process, are a significant factor affecting the plasticity characteristics. The research results may be used as a basic reference in the study of the mechanical properties of tectonic coal, gas migration and coal and gas outburst mechanisms.

Suggested Citation

  • Longlong Pang & Yuzhong Yang & Liyun Wu & Fei Wang & Han Meng, 2019. "Effect of Particle Sizes on the Physical and Mechanical Properties of Briquettes," Energies, MDPI, vol. 12(19), pages 1-16, September.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:19:p:3618-:d:269730
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    References listed on IDEAS

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    1. Chenghao Zhang & Nong Zhang & Dongjiang Pan & Deyu Qian & Yanpei An & Yuxin Yuan & Zhe Xiang & Yang Wang, 2018. "Experimental Study on Sensitivity of Porosity to Pressure and Particle Size in Loose Coal Media," Energies, MDPI, vol. 11(9), pages 1-19, August.
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    Cited by:

    1. Michał Rejdak & Rafał Bigda & Małgorzata Wojtaszek, 2020. "Use of Alternative Raw Materials in Coke-Making: New Insights in the Use of Lignites for Blast Furnace Coke Production," Energies, MDPI, vol. 13(11), pages 1-16, June.
    2. Congyu Zhong & Liwen Cao & Jishi Geng & Zhihao Jiang & Shuai Zhang, 2021. "Experimental Analysis of the Mechanical Properties and Resistivity of Tectonic Coal Samples with Different Particle Sizes," Energies, MDPI, vol. 14(8), pages 1-13, April.
    3. Hívila M. P. Marreiro & Rogério S. Peruchi & Riuzuani M. B. P. Lopes & Silvia L. F. Andersen & Sayonara A. Eliziário & Paulo Rotella Junior, 2021. "Empirical Studies on Biomass Briquette Production: A Literature Review," Energies, MDPI, vol. 14(24), pages 1-40, December.

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