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Volume 30 Issue 2
Feb.  2023
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文章导航 >  矿物冶金与材料学报（英文）  > 2023  >  30(2): 314-323
Qiangjian Gao, Guopeng Zhang, Haiyan Zheng, Xin Jiang, and Fengman Shen, Combustion performance of pulverized coal and corresponding kinetics study after adding the additives of Fe2O3 and CaO, Int. J. Miner. Metall. Mater., 30(2023), No. 2, pp. 314-323. https://doi.org/10.1007/s12613-022-2432-5
Cite this article as:
Qiangjian Gao, Guopeng Zhang, Haiyan Zheng, Xin Jiang, and Fengman Shen, Combustion performance of pulverized coal and corresponding kinetics study after adding the additives of Fe2O3 and CaO, Int. J. Miner. Metall. Mater., 30(2023), No. 2, pp. 314-323. https://doi.org/10.1007/s12613-022-2432-5
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研究论文

Fe2O3和CaO添加剂对煤粉燃烧性能的影响及相关动力学研究

  • 1)

    东北大学多金属共生矿生态化冶金教育部重点实验室, 沈阳 110819, 中国

  • 2)

    东北大学冶金学院, 沈阳 110819, 中国

  • 通讯作者:

    高强健    E-mail: gaoqiangjian@163.com

  • 喷吹煤粉在高炉内的燃烧特性被认为是确定适宜喷煤量的关键参数。本文通过热重分析法考察了Fe2O3和CaO两种添加剂对煤粉燃烧特性的影响。结果表明：Fe2O3和CaO对煤粉燃烧都有促进作用。煤粉的着火指数（Ci），燃尽指数（Db）和综合燃烧指数（Sn）都得到不同程度的改善。当Fe2O3添加比例由0增至5.0wt%时，Sn由1.37×10−6增至2.16×10−6 %2·min−2·°C−3。同时，研究采用Coats-Redfern method来解析煤粉燃烧动力学过程。结果表明：配加添加剂后，煤粉燃烧活化能（E）逐渐降低。当Fe2O3添加比例由0增至5.0wt%时，E由56.54降至35.75 kJ⋅mol−1，这也再次证明了添加剂对煤粉的燃烧有促进作用。此外，高炉喷煤过程使用纯Fe2O3和CaO物质是不经济的。出于成本考虑，研究选取含有Fe2O3和CaO物质的除尘灰作为添加剂，开展了相关的研究，并获得了同样的效果。因此，含Fe2O3和CaO物质的除尘灰是煤粉助燃剂的潜在选择，该方法也为处置除尘灰类固废提供了一种可行的方向。
    • Research Article

    Combustion performance of pulverized coal and corresponding kinetics study after adding the additives of Fe2O3 and CaO

    + Author Affiliations
      Abstract
    • Combustion performance of pulverized coal (PC) in blast furnace (BF) process is regarded as a criteria parameter to assess the proper injection dosage of PC. In this paper, effects of two kinds of additives, Fe2O3 and CaO, on PC combustion were studied using the thermo-gravimetric method. The results demonstrate that both the Fe2O3 and CaO can promote combustion performance index of PC including ignition index (Ci), burnout index (Db), as well as comprehensive combustibility index (Sn). The Sn increases from 1.37 × 10−6 to 2.16 × 10−6 %2·min−2·°C−3 as the Fe2O3 proportion increases from 0 to 5.0wt%. Additionally, the combustion kinetics of PC was clarified using the Coats-Redfern method. The results show that the activation energy (E) of PC combustion decreases after adding the above additives. For instance, the E decreases from 56.54 to 35.75 kJ/mol when the Fe2O3 proportion increases from 0 to 5.0wt%, which supports the improved combustion performance. Moreover, it is uneconomic to utilize pure Fe2O3 and CaO in production. Based on economy analysis, we selected the iron-bearing dust (IBD) which contains much Fe2O3 and CaO component to investigate, and got the same effects. Therefore, the IBD is a potential option for catalytic PC combustion in BF process.
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