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Laboratory Carburization of Direct-Reduced Iron in CH4-H2-N2 Gas Mixtures, and Comparison with Industrial Samples

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Abstract

Iron ore pellets, reduced with hydrogen, were isothermally carburized in CH4-H2-N2 at 823 K, 923 K, and 1023 K (550 °C, 650 °C, and 750 °C). Temperature strongly affected the total carbon concentration after carburization; significant unbound carbon deposited at the highest temperature. For the range of sizes tested (10 to 12 mm), pellet size did not affect carburization. The variability between pellets was much smaller than for industrial pellets; inhomogeneous gas distribution likely affects carburization under large-scale industrial conditions.

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Financial and technical support by the industrial members of the Center for Iron and Steelmaking Research is gratefully acknowledged.

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Authors and Affiliations

  1. Center for Iron and Steelmaking Research, Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA

    Yining He (Graduate Student) & P. Chris Pistorius (POSCO Professor)

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  1. Yining He
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  2. P. Chris Pistorius
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Correspondence to P. Chris Pistorius.

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Manuscript submitted November 29, 2015.

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He, Y., Pistorius, P.C. Laboratory Carburization of Direct-Reduced Iron in CH4-H2-N2 Gas Mixtures, and Comparison with Industrial Samples. Metall Mater Trans B 47, 1538–1541 (2016). https://doi.org/10.1007/s11663-016-0619-8

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