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Magnetite Particle Size Distribution and Pellet Oxidation

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Abstract

Oxidation of magnetite pellets is commonly performed to prepare strong pellets for ironmaking. This article presents a contribution to quantitative understanding of fundamental pellet oxidation kinetics, based on measured oxidation kinetics of magnetite particles and pellets. The commonly observed “plateau” oxidation behavior is confirmed to be consistent with the effect of very large differences in magnetite particle sizes in the concentrate from which pellets are produced. The magnetite particles range in size from less than a micron to several tens of a microns; changing the size distribution by inert sintering of pellets decreases both the plateau level of oxidation and the specific surface area, in ways that are compatible with an assumed Rosin-Rammler magnetite particle size distribution.

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Acknowledgments

Support of this project by the members of the Center for Iron and Steelmaking Research is gratefully acknowledged.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA, USA

    Hyeon Jeong Cho (Graduate Student, Assistant Manager), Ming Tang (Research Assistant) & Petrus Christiaan Pistorius (Professor)

  2. Technical Research Center, Hyundai Steel, Dangjin, South Korea

    Hyeon Jeong Cho (Graduate Student, Assistant Manager)

Authors
  1. Hyeon Jeong Cho
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  2. Ming Tang
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  3. Petrus Christiaan Pistorius
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Correspondence to Petrus Christiaan Pistorius.

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Manuscript submitted December 13, 2013.

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Cho, H.J., Tang, M. & Pistorius, P.C. Magnetite Particle Size Distribution and Pellet Oxidation. Metall Mater Trans B 45, 1213–1220 (2014). https://doi.org/10.1007/s11663-014-0104-1

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  • DOI: https://doi.org/10.1007/s11663-014-0104-1

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