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<p>To evaluate the pyrolysis characteristics of insulation materials used in mining cables and their implications for fire risk, this study investigates commonly used materials, EPDM (ethylene propylene diene monomer) and XLPE (cross-linked polyethylene), under different heating rates using a TG-IR combined method. The kinetic parameters were calculated and compared using the Kissinger and Ozawa methods. The results show that both insulation materials undergo a three-step pyrolysis process, with differences observed in pyrolysis temperatures, mass loss rates, and peak temperatures at each stage. EPDM exhibits a wider pyrolysis temperature range and higher char yield, indicating greater thermal stability, while XLPE demonstrates a more complete pyrolysis with lower residual mass. Gas analysis revealed that H<sub>2</sub>O, CH<sub>4</sub>, CO<sub>2</sub>, CO, and aromatic hydrocarbons were the primary products in the first and second stages, while CO<sub>2</sub> and CO were the main products in the third stage due to carbonization and oxidative combustion. The activation energies for the second stage, 97.41&#xa0;kJ&#xa0;mol<sup>−1</sup> for EPDM and 134.10&#xa0;kJ&#xa0;mol<sup>−1</sup> for XLPE, suggest that this stage involves main chain cleavage and is critical to the pyrolysis process. These findings provide a theoretical basis for the selection and optimization of insulation materials for mining cables and contribute to the quantitative assessment of fire risks and improvements in fire protection design.</p>

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Experimental study on pyrolysis characteristics of mining cable insulation layer

  • 期刊论文

  • 发表日期：

    2025年3月25日

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  • Weifeng Wang,
  • Yuliang Guo,
  • Yuhang Huo,
  • Hongyin Yi,
  • Zhuoyang Li,
  • Di He,
  • Xiaopeng Shang,
  • Jinzhong Wu,
  • Yu Li,
  • Gaoshuang Li

摘要

To evaluate the pyrolysis characteristics of insulation materials used in mining cables and their implications for fire risk, this study investigates commonly used materials, EPDM (ethylene propylene diene monomer) and XLPE (cross-linked polyethylene), under different heating rates using a TG-IR combined method. The kinetic parameters were calculated and compared using the Kissinger and Ozawa methods. The results show that both insulation materials undergo a three-step pyrolysis process, with differences observed in pyrolysis temperatures, mass loss rates, and peak temperatures at each stage. EPDM exhibits a wider pyrolysis temperature range and higher char yield, indicating greater thermal stability, while XLPE demonstrates a more complete pyrolysis with lower residual mass. Gas analysis revealed that H2O, CH4, CO2, CO, and aromatic hydrocarbons were the primary products in the first and second stages, while CO2 and CO were the main products in the third stage due to carbonization and oxidative combustion. The activation energies for the second stage, 97.41 kJ mol−1 for EPDM and 134.10 kJ mol−1 for XLPE, suggest that this stage involves main chain cleavage and is critical to the pyrolysis process. These findings provide a theoretical basis for the selection and optimization of insulation materials for mining cables and contribute to the quantitative assessment of fire risks and improvements in fire protection design.