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Analysis of Energy Consumption of the Reduction of Fe 2 O 3 by Hydrogen and Carbon Monoxide Mixtures

Author

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  • Guanyong Sun

    (School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
    Beijing Key Laboratory of Special Melting and Preparation of High-End Metal Materials, University of Science and Technology Beijing, Beijing 100083, China)

  • Bin Li

    (School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
    Beijing Key Laboratory of Special Melting and Preparation of High-End Metal Materials, University of Science and Technology Beijing, Beijing 100083, China)

  • Wensheng Yang

    (School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
    Beijing Key Laboratory of Special Melting and Preparation of High-End Metal Materials, University of Science and Technology Beijing, Beijing 100083, China)

  • Jing Guo

    (School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
    Beijing Key Laboratory of Special Melting and Preparation of High-End Metal Materials, University of Science and Technology Beijing, Beijing 100083, China)

  • Hanjie Guo

    (School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
    Beijing Key Laboratory of Special Melting and Preparation of High-End Metal Materials, University of Science and Technology Beijing, Beijing 100083, China)

Abstract

Energy consumption is directly related to the energy supply and production costs of gas-based direct reduction ironmaking, which is an effective choice to reduce the energy consumption of iron making. In this paper, the minimum Gibbs free energy principle was used to calculate the equilibrium composition under the conditions of reduction gas consisting of hydrogen and carbon monoxide (hydrogen concentration of 0–100%, reduction gas amount of 0–6.0 mol, reduction temperature of 790–1100 °C, and 0.5 mol Fe 2 O 3 ). According to the enthalpy change, a simplified energy consumption model of a gas-based direct reduction ironmaking process was established, and the energy consumption per mole of metallic iron produced was calculated in detail. The following conclusions were drawn: at the stage when the reduction reaction occurred, the utilization rate of hydrogen or carbon monoxide remained unchanged with the increase in the amount of reduction gas or the increase in the hydrogen concentration of initial gas. The direct energy consumption increased with the increase in the hydrogen concentration at 790–980 °C and the opposite was true at 980–1100 °C. At 790–980 °C, the total energy consumption per ton of iron was greater than 0 and increased with the increase in initial hydrogen concentration from 40% to 100%, and it was less than 0 and increased with the increase in initial hydrogen concentration from 0% to 30%. It was possible to achieve zero total energy consumption with a hydrogen concentration of 30% and a 973 °C reduction.

Suggested Citation

  • Guanyong Sun & Bin Li & Wensheng Yang & Jing Guo & Hanjie Guo, 2020. "Analysis of Energy Consumption of the Reduction of Fe 2 O 3 by Hydrogen and Carbon Monoxide Mixtures," Energies, MDPI, vol. 13(8), pages 1-13, April.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:8:p:1986-:d:346803
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    References listed on IDEAS

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    1. Chen, Wei-Hsin & Hsu, Chih-Liang & Du, Shan-Wen, 2015. "Thermodynamic analysis of the partial oxidation of coke oven gas for indirect reduction of iron oxides in a blast furnace," Energy, Elsevier, vol. 86(C), pages 758-771.
    2. Quader, M. Abdul & Ahmed, Shamsuddin & Ghazilla, Raja Ariffin Raja & Ahmed, Shameem & Dahari, Mahidzal, 2015. "A comprehensive review on energy efficient CO2 breakthrough technologies for sustainable green iron and steel manufacturing," Renewable and Sustainable Energy Reviews, Elsevier, vol. 50(C), pages 594-614.
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    Cited by:

    1. Qiu, Ziyang & Du, Tao & Yue, Qiang & Na, Hongming & Sun, Jingchao & Yuan, Yuxing & Che, Zichang & Wang, Yisong & Li, Yingnan, 2023. "A multi-parameters evaluation on exergy for hydrogen metallurgy," Energy, Elsevier, vol. 281(C).
    2. Guanyong Sun & Bin Li & Hanjie Guo & Wensheng Yang & Shaoying Li & Jing Guo, 2020. "Thermodynamic Study on Reduction of Iron Oxides by H 2 + CO + CH 4 + N 2 Mixture at 900 °C," Energies, MDPI, vol. 13(19), pages 1-18, September.

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