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Effects of Fuel Type and Operation Parameters on Combustion and NO x Emission of the Iron Ore Sintering Process

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  • Wenjie Ni

    (School of Metallurgy, Northeastern University, Shenyang 110819, China
    Key Laboratory of Ecological Utilization of Multi-Metallic Mineral of Education Ministry, Northeastern University, Shenyang 110819, China)

  • Haifeng Li

    (School of Metallurgy, Northeastern University, Shenyang 110819, China
    Key Laboratory of Ecological Utilization of Multi-Metallic Mineral of Education Ministry, Northeastern University, Shenyang 110819, China)

  • Yingyi Zhang

    (School of Metallurgical Engineering, Anhui University of Technology, Maanshan 243002, China
    School of Material Science and Engineering, Chongqing University, Chongqing 400030, China)

  • Zongshu Zou

    (School of Metallurgy, Northeastern University, Shenyang 110819, China
    Key Laboratory of Ecological Utilization of Multi-Metallic Mineral of Education Ministry, Northeastern University, Shenyang 110819, China)

Abstract

A transient two-dimensional mathematical model is developed to study the influence of fuel type and operation parameters on combustion and NO x emission during the iron ore sintering process. The model was validated by comparing the model predictions with sintering pot test data. The predictions show reasonable agreement with the averaged values of the test data. In addition to the conventional sintering process, this model can also predict new processes such as flue gas recirculation, gas fuel injection, and fuel layered distribution. The simulation results show that the fuel NO x is the main part of the NO x emission during sintering, and thermal NO x forms a very little part. The produced NO x can be reduced not only by coke but also by CO around coke particles, with reduction proportions of 50% and 10%, respectively. Two types of coke A and B were compared. With Coke A as solid fuel and consumption of 3.8%, the NO x emission was 320 ppm. Increasing the replacement of Coke A with Coke B, the NO x emission was decreased, being decreased by 28.13% to 230 ppm with the replacement proportion of 50%. When only Coke B was used, the NO x emissions could be lowered by 53.13% to 150 ppm. Decreasing the particle size from 1.6 mm to 1.2 mm led the NO x emission to be increased by 10.93% from 320 ppm to 355 ppm. With Coke A as the only solid fuel, increasing the fuel ratio to 4.2% led the NO x emission to be increased by 9.38% to 350 ppm; increasing the oxygen content of inlet air from 21% to 30% led the NO x emission to be increased by 15.00% from 320 ppm to 368 ppm.

Suggested Citation

  • Wenjie Ni & Haifeng Li & Yingyi Zhang & Zongshu Zou, 2019. "Effects of Fuel Type and Operation Parameters on Combustion and NO x Emission of the Iron Ore Sintering Process," Energies, MDPI, vol. 12(2), pages 1-21, January.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:2:p:213-:d:196577
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    References listed on IDEAS

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    1. Pahlevaninezhad, Masoud & Davazdah Emami, Mohsen & Panjepour, Masoud, 2014. "The effects of kinetic parameters on combustion characteristics in a sintering bed," Energy, Elsevier, vol. 73(C), pages 160-176.
    2. Cheng, Zhilong & Wang, Jingyu & Wei, Shangshang & Guo, Zhigang & Yang, Jian & Wang, Qiuwang, 2017. "Optimization of gaseous fuel injection for saving energy consumption and improving imbalance of heat distribution in iron ore sintering," Applied Energy, Elsevier, vol. 207(C), pages 230-242.
    3. Hashimoto, Nozomu & Watanabe, Hiroaki & Kurose, Ryoichi & Shirai, Hiromi, 2017. "Effect of different fuel NO models on the prediction of NO formation/reduction characteristics in a pulverized coal combustion field," Energy, Elsevier, vol. 118(C), pages 47-59.
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