Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Analysis of Reducing Characteristics of Direct Reduced Iron using Blast Furnace Dust

  • Yun, Young Min (Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology) ;
  • Chu, Yong Sik (Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology) ;
  • Seo, Sung Kwan (Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology) ;
  • Jeong, Jae Hyun (Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology)
  • Received : 2016.05.04
  • Accepted : 2016.07.18
  • Published : 2016.07.31
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Abstract

Industrial by-products generated by integrated iron and steel manufacture cause environmental pollution. The by-products contain not only iron element but also harmful substances. Therefore, in view of to waste recycling and environmental preservation, production of sponge iron using the by-product is considered an effective recycling method. In this study, reduction efficiency of pellets from blast furnace dust was measured. Metallization was found to be increased, as $C/Fe_{total}$ ratio and reaction time were increased. The pellets were formed into a globular shape, and calcined for 60 minutes at $1100^{\circ}C$ in an electric furnace. Phase changes were analyzed using an X-ray diffractometer. Microstructures of the pellets were observed by a scanning electron microscope.

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References

  1. Y.-S. Lee and I. Sohn, "Relationship between the Reduction Degree and Strength of DRI Pellets Produced from Iron and Carbon Bearing Wastes Using an RHF Simulator," ISIJ Int., 52 1454-62 (2012). https://doi.org/10.2355/isijinternational.52.1454
  2. S.-H. Chung and I. Sohn, "DRI from Recycled Iron Bearing Wastes for Lower Carbon in the Blast Furnace," ISIJ Int., 55 1157-64 (2015). https://doi.org/10.2355/isijinternational.55.1157
  3. World Direct Reduction Statistics; Midrex Technologies, Inc., Charlotte, North Carolina, USA, pp. 1-15, 2014.
  4. L. V. Bogdandy and H. J. Engell, The Reduction of Iron Ores; pp. 289-96, Springer-Verlag, Berlin, 1971.
  5. I. Moon and S. Jung, "Reduction of Solid Iron Oxide by Carbon," Steel Res. Int., 79 667-70 (2008). https://doi.org/10.1002/srin.200806181
  6. S. Mookherjee, H. S. Ray, and A. Mukherjee, "Isothermal Reduction of Iron Ore Fines Sur-Rounded by Coal or Char Fines," Ironmaking Steelmaking, 13 [5] 229-35 (1986).
  7. M. Rahman, R. Haque, and M. M. Haque, "Kinetics of Reduction of Millscale by Coal: Effect of Process Variables," Ironmaking Steelmaking, 22 [2] 166-70 (1995).
  8. C. E. Seaton, J. S. Foster, and J. Velasco, "Reduction Kinetics of Hematite and Magnetite Pellets Containing Coal Char," Trans. Iron Steel Inst. Jpn., 23 490-96 (1993).
  9. T. Sharma, "Non-Coking Coal Quality and Composite Pre-Reduced Pellets," Int. J. Miner. Process., 39 299-11 (1993). https://doi.org/10.1016/0301-7516(93)90022-3
  10. D. Anghelina, G. Brooks, and G. A. Irons, "High Temperature Behaviour of Directly Reduced Iron Fines," Can. Metall. Q., 46 373-78 (2007). https://doi.org/10.1179/cmq.2007.46.4.373
  11. N. S. Srinivasan and A. K. Lahiri, "On the Mechanism of Iron Oxide Reduction by Carbon," Metall. Trans. B, 6B 269-74 (1975).
  12. D. Wagner, O. Devisme, F. Patisson, and D. Ablitzer, "A Laboratory Study of The Reduction of Iron Oixdes by Hydrogen," Adv. Process. Met. Mater., Sohn Int. Symp., Proc., 2 111-20 (2008).
  13. T. Sharma, "Non-Coking Coal Quality and Composite Pre-Reduced Pellets," Int. J. Miner. Process., 39 299-11 (1993). https://doi.org/10.1016/0301-7516(93)90022-3
  14. R. Haque, H. S. Ray, and A. Mukherjee, "Packed Bed Reduction of Iron Ore Fines by Coal Fines: Effect of Operating Variables," Ironmaking Steelmaking, 19 [1] 31-5(1992).
  15. D. H. S. John, S. P. Matthew, and P. C. Hayes, "The Breakdown of Dense Iron Layers on Wustite in $CO/CO_2$ and $H_2/H_2O$ Systems," Metall. Trans. B, 15 [4] 701-8 (1984). https://doi.org/10.1007/BF02657292
  16. M. Rahman, R. Haque, and M. M. Haque,"Kinetics of Reduction of Millscale by Coal: Effect of Process Variables," Ironmaking Steelmaking, 22 [2] 166-70(1995).
  17. D. H. S. John, S. P. Matthew, and P. C. Hayes, "Microstructural Changes during the Reduction of Wustite," Symp. Ser. - Australas. Inst. Min. Metall., 36 287-94 (1984).
  18. G. S. Liu and V. Strezov, "Thermal Investigations of Direct Iron Ore Reduction with Coal," Thermochim. Acta, 410 133-40 (2004). https://doi.org/10.1016/S0040-6031(03)00398-8