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Reduction Behavior of Ternary Calcium Ferrites for CaO–Fe2O3–MgO System

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Characterization of Minerals, Metals, and Materials 2018 (TMS 2018)

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Abstract

Sinter is an important iron-bearing material charged into blast furnace. Calcium ferrite (CF) is one of the most significant liquid phases in fluxed sinter. The isothermal reduction kinetics of CF and CF8M (n(CaO):n(Fe2O3) = 1, wt%(MgO) = 8) with 30% CO and 70% N2 gas mixtures at 1123, 1173, and 1223 K were investigated through thermogravimetric analysis in this study. Rate analysis illuminates that the reduction processes of CF and CF8M are mainly expressed as a typical two-stage reaction. Sharp analysis indicates that CF and CF8M reduction is expressed by the Avrami–Erofeev equation presenting a 2D shrinking layer reaction. The apparent activation energy values of CF and CF8M reduction are 46.9 and 31.8 kJ mol−1 individually based on model-free method.

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Author information

Authors and Affiliations

  1. College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China

    Senwei Xuan, Xuewei Lv, Kai Tang, Chengyi Ding, Gang Li & Chenguang Bai

Authors
  1. Senwei Xuan
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  2. Xuewei Lv
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  3. Kai Tang
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  4. Chengyi Ding
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  5. Gang Li
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  6. Chenguang Bai
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Corresponding author

Correspondence to Xuewei Lv .

Editor information

Editors and Affiliations

  1. Michigan Technological University, Houghton, Michigan, USA

    Bowen Li

  2. CanmetMATERIALS, Hamilton, Ontario, Canada

    Jian Li

  3. Al-Isra University, Amman, Jordan

    Shadia Ikhmayies

  4. ArcelorMittal Global R&D, East Chicago, Indiana, USA

    Mingming Zhang

  5. Middle East Technical University, Ankara, Turkey

    Yunus Eren Kalay

  6. Mail Stop G770, Los Alamos National Laboratory, Los Alamos, New Mexico, USA

    John S. Carpenter

  7. Michigan Technological University, Houghton, Michigan, USA

    Jiann-Yang Hwang

  8. Military Institute of Engineering, Rio de Janeiro, Brazil

    Sergio Neves Monteiro

  9. Politecnico di Torino, Turin, Italy

    Donato Firrao

  10. UNSW Canberra, Campbell, ACT, Australia

    Andrew Brown

  11. Chongqing University, Chongqing, China

    Chenguang Bai

  12. Central South University, Changsha, China

    Zhiwei Peng

  13. UNSW Canberra, Campbell, Aust Capital Terr, Australia

    Juan P. Escobedo-Diaz

  14. Naval Research Laboratory, Washington, District of Columbia, USA

    Ramasis Goswami

  15. Korea Railroad Research Institute, Uiwang, Korea (Republic of)

    Jeongguk Kim

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Xuan, S., Lv, X., Tang, K., Ding, C., Li, G., Bai, C. (2018). Reduction Behavior of Ternary Calcium Ferrites for CaO–Fe2O3–MgO System. In: Li, B., et al. Characterization of Minerals, Metals, and Materials 2018 . TMS 2018. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-72484-3_13

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