Non-isothermal thermogravimetric investigation on mutual effect between bituminite and anthracite in blends for blast furnace injection

  • Yun-fei Wu
  • Qing-hai PangEmail author
  • Zhi-jun He
  • Teng-fei Song
  • Wen-long Zhan
  • Jun-hong Zhang
Original Paper


In order to clarify the mutual effect between bituminite and anthracite in blends during industrial combustion, the influence of particle size and heating rate as well as oxygen concentration in atmosphere was analyzed. The results of non-isothermal thermogravimetric analysis indicated that the combustion behavior of blends was of great difference though blends were prepared with the same volatile content of 20%. The catalysis of bituminite to anthracite changed with the thermal and kinetic condition of combustion reaction, and consequently, blends with different collocations were suitable for various combustion environments. Superior combustion properties of some blends were achieved at high heating rates, while others might react faster under high oxygen-enriched atmosphere. Simultaneously, the volume model and unreacted core model as well as random pore model were introduced to fit the experimental data. The kinetic calculation results showed that the combustion of blends at different heating rates all agreed better with that of random pore model in comparison with the other two models, while the apparent activation energy of samples all decreased with the increase in heating rate. The similarity of functional group structure between bituminite and anthracite is closely related to the accordance in combustion stage of bituminite and anthracite in blends.


Pulverized coal injection Coal blend Mutual effect Kinetics Activation energy Bituminite Anthracite 



This work was financially supported by Natural Science and Foundation of Liaoning Province (No. 20170540455) and National Natural Science Foundation of China (51504131, 51474124, 51647639).


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Copyright information

© China Iron and Steel Research Institute Group 2019

Authors and Affiliations

  • Yun-fei Wu
    • 1
  • Qing-hai Pang
    • 1
    Email author
  • Zhi-jun He
    • 1
  • Teng-fei Song
    • 2
  • Wen-long Zhan
    • 1
  • Jun-hong Zhang
    • 1
  1. 1.School of Materials and MetallurgyUniversity of Science and Technology LiaoningAnshanChina
  2. 2.School of Metallurgical and Ecological EngineeringUniversity of Science and Technology BeijingBeijingChina

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