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

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

Iron ore pellets, reduced with hydrogen, were isothermally carburized in CH 4 -H 2 -N 2 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...

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Veröffentlicht in:Metallurgical and materials transactions. B, Process metallurgy and materials processing science Process metallurgy and materials processing science, 2016-06, Vol.47 (3), p.1538-1541
Hauptverfasser: He, Yining, Pistorius, P. Chris
Format: Artikel
Sprache:eng
Schlagworte:
Carbon
Characterization and Evaluation of Materials
Chemistry and Materials Science
Communication
Gases
Iron
Materials Science
Metallic Materials
Metallurgy
Nanotechnology
Structural Materials
Surfaces and Interfaces
Thin Films
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Zusammenfassung:Iron ore pellets, reduced with hydrogen, were isothermally carburized in CH 4 -H 2 -N 2 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.
ISSN:1073-5615
1543-1916
DOI:10.1007/s11663-016-0619-8