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Reaction Behavior and Transformation Path of Zinc in the Heating-Up Zone during Sintering Process

Author

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  • Wei Lv

    (School of Minerals Processing & Bioengineering, Central South University, Changsha 410083, China
    School of Metallurgy and Environment, Central South University, Changsha 410083, China)

  • Min Gan

    (School of Minerals Processing & Bioengineering, Central South University, Changsha 410083, China)

  • Xiaohui Fan

    (School of Minerals Processing & Bioengineering, Central South University, Changsha 410083, China)

  • Zengqing Sun

    (School of Minerals Processing & Bioengineering, Central South University, Changsha 410083, China)

  • Rongchang Zhang

    (School of Minerals Processing & Bioengineering, Central South University, Changsha 410083, China)

  • Zhiyun Ji

    (School of Minerals Processing & Bioengineering, Central South University, Changsha 410083, China)

  • Xuling Chen

    (School of Minerals Processing & Bioengineering, Central South University, Changsha 410083, China)

Abstract

Iron ore sintering is a simple and sustainable way to treat zinc-bearing secondary resources. In this paper, the reaction behavior of zinc was studied by combining thermodynamic calculation and simulation tests under sintering temperature and atmosphere. The evolution law of Zn-containing phases during the heating process was also revealed. The results showed that Zn-containing substances were mainly converted to ZnO when the temperature reached 700 °C in the pre-drying zone, and ZnO started to combine with Fe 2 O 3 to form ZnFe 2 O 4 when the temperature reached 800 °C in the combustion zone. ZnFe 2 O 4 remained stable at 1300 °C, and did not change in the atmosphere with low CO concentration. In conventional sintering conditions, the removal rate of zinc was about 5 wt%, zinc was mainly converted to ZnFe 2 O 4 and stuck in the sinter. Therefore, to meet the zinc amount of the blast furnace load, pretreatment of raw materials or ore matching to control zinc content is necessary.

Suggested Citation

  • Wei Lv & Min Gan & Xiaohui Fan & Zengqing Sun & Rongchang Zhang & Zhiyun Ji & Xuling Chen, 2022. "Reaction Behavior and Transformation Path of Zinc in the Heating-Up Zone during Sintering Process," Sustainability, MDPI, vol. 14(16), pages 1-14, August.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:16:p:10147-:d:889278
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    References listed on IDEAS

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    1. Hyeryeong Jeong & Kongtae Ra, 2022. "Investigations of Metal Pollution in Road Dust of Steel Industrial Area and Application of Magnetic Separation," Sustainability, MDPI, vol. 14(2), pages 1-12, January.
    2. Neha Mehta & Giovanna Antonella Dino & Iride Passarella & Franco Ajmone-Marsan & Piergiorgio Rossetti & Domenico Antonio De Luca, 2020. "Assessment of the Possible Reuse of Extractive Waste Coming from Abandoned Mine Sites: Case Study in Gorno, Italy," Sustainability, MDPI, vol. 12(6), pages 1-22, March.
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    Cited by:

    1. Seongkyu Cho & Leonardo Tomas Da Rocha & Sung-Wan Kim & Sung-Mo Jung, 2023. "Recovery of Zn and Fe from Steelmaking By-Products by Ar Plasma Smelting," Sustainability, MDPI, vol. 15(17), pages 1-18, August.

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