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Effect of Addition of Mill Scale on Sintering of Iron Ores

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Iron-rich (65 to 70 pct total Fe) mill scale generated during processing by steel mills can be recycled by using it as a ferrous raw material in the sintering process. The effect of mill scale addition on the phase formation of sintered specimens from an industrial sinter blend containing 0 to 15 wt pct mill scale was examined, and the mineral phases formed during sintering under various conditions (T = 1523 K to 1598 K [1250 °C to 1325 °C] and gas compositions of pO2 = 0.5, 5 and 21 kPa) were quantitatively measured. For samples sintered in air (pO2 = 21 kPa), there was negligible effect of mill scale addition on the phases formed. The oxidation of the mill scale was complete, and phases such as Silico-Ferrite of Calcium and Aluminum (SFCA), SFCA-I, and hematite dominated. Under lower oxygen partial pressures (pO2 = 0.5 or 5 kPa), and throughout the temperature range examined, the mill scale was converted to magnetite, with the extent of reaction controlled by the hematite-magnetite conversion kinetics. When sintered in the gas mixture with pO2 = 5 kPa, an increase in the mill scale content from 0 to 15 wt pct resulted in a decrease of hematite and total SFCA phases and a corresponding increase in the amount of magnetite which formed. The oxidation of wustite in mill scale to magnetite decreased the local partial pressure of O2 and increased sintering temperature, which promoted the decomposition of hematite.

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  1. N. Birks, G. H. Meier, and F. S. Pettit: Introduction to the High Temperature Oxidation of Metals, 2nd ed., Cambridge University Press, Cambridge, 2006.

    Book  Google Scholar 

  2. T. Umadevi, M. G. S. Kumar, P. C. Mahapatra, T. M. Babu and M. Ranjan: Ironmak. Steelmak., 2009, vol. 36, pp. 409-15.

    Article  Google Scholar 

  3. T. Umadevi, A. Brahmacharyulu, P. Karthik, P. C. Mahapatra, M. Prabhu and M. Ranjan: Ironmak. Steelmak., 2012, vol. 39, pp. 222-7.

    Article  Google Scholar 

  4. A. K. Biswas: Principles of Blast Furnace Ironmaking: Theory and Practice, Cootha Publishing House, Brisbane, 1981, pp. 194.

    Google Scholar 

  5. P. R. Dawson, J. Ostwald, and K. M. Hayes: Trans. Inst. Min. Metall. C, 1985, vol. 94, pp. C71-8.

    Google Scholar 

  6. R. A Button and P. A. Lundh: Ironmak. Steelmak., 1989, vol. 16, pp. 151-64.

    Google Scholar 

  7. S. C. Panigrahy, M. J. Rigaud, S. P. Chong and B. Chanda: 53rd Ironmaking Conference, AIME Iron and Steel Society, Warrendale, 1994, pp. 523-31.

    Google Scholar 

  8. L. X. Yang and E. Matthews: ISIJ Int., 1997, vol. 37, pp. 854-61.

    Article  Google Scholar 

  9. J. M. F. Clout and J. R. Manuel: Powder Technol., 2003, vol. 130, pp. 393-9.

    Article  Google Scholar 

  10. S. P. E. Forsmo, S. E. Forsmo, P. O. Samskog and B. M. T. Björkman: Powder Technol., 2008, vol. 183, pp. 247-59.

    Article  Google Scholar 

  11. L. X. Yang: ISIJ Int., 2005, vol. 45, pp. 469-76.

    Article  Google Scholar 

  12. N. A. El-Hussiny, F. M. Mohamed and M. E. H. Shalabi: Sci. Sinter., 2011, vol. 43, pp. 21-31.

    Article  Google Scholar 

  13. B.C. Kim, Y.S. Seo and S.S. Yoon: Repub. Korean Kongkae Taeho Kongbo, KR 2012097733 A 20120905, 2012.

  14. Y. Konishi and S. Taguchi: Jpn. Kokai Tokkyo Koho, JP 06346159 A 19941220, 1994.

  15. R. Bodik, J. Benka, F. Sebo, M. Kostecky and F. Lapsansky: Czech. CS 274018 B1 19910411, 1992.

  16. Anon: Jpn. Kokai Tokkyo Koho, JP 58123836 A 19830723, 1983.

  17. Z. Wang, D. Pinson, S. Chew, H. Rogers, B.J. Monaghan, M.I. Pownceby, N.A.S. Webster and G. Zhang: Metall. Mater. Trans. B, 2016, vol. 47B, pp. 330-43.

    Article  Google Scholar 

  18. Z. Wang, D. Pinson, S. Chew, B.J. Monaghan, M.I. Pownceby, N.A.S. Webster, H. Rogers and G. Zhang: ISIJ Int., 2016, vol. 56 (accept).

  19. N. A. S. Webster, M. I. Pownceby, I. C. Madsen and J. A. Kimpton: Metall. Mater. Trans. B, 2012, vol. 43B, pp. 1344-57.

    Article  Google Scholar 

  20. M. H. Davies, M. T. Simnad and C. E. Birchenall: Trans. ASME, 1951, vol. 3, pp. 889-96.

    Google Scholar 

  21. W. Schwenk and A. Rahmel: Oxid. Met., 1986, vol. 25, pp. 293-303.

    Article  Google Scholar 

  22. D. J. Young: High Temperature Oxidation and Corrosion of Metals, Elsevier, Oxford, 2008, pp. 38.

    Google Scholar 

  23. S. Wang, W. Gao and L. Kong: Ironmaking Steelmaking, 1998, vol. 25, pp. 296-301.

    Google Scholar 

  24. X. Guo and Y. Ono: Memoirs of the Faculty of Engineering, Kyushu University, Fukuoka, 1992, vol. 52, pp. 7-17.

    Google Scholar 

  25. J. W. Jeon, S. M. Jung and Y. Sasaki: ISIJ Int., 2010, vol. 50, pp. 1064-70.

    Article  Google Scholar 

  26. M. Binnewies and E. Milke: Thermochemical Data of Elements and Compounds, 2nd ed., Wiley, Weinheim, 2002.

    Book  Google Scholar 

  27. L. H. Hsieh and J. A. Whiteman: ISIJ Int., 1989, vol. 29, pp. 625-34.

    Article  Google Scholar 

  28. N. A. S. Webster, M. I. Pownceby, I. C. Madsen and J. A. Kimpton: ISIJ Int., 2013, vol. 53, pp. 774-81.

    Article  Google Scholar 

  29. N. A. S. Webster, M. I. Pownceby, I. C. Madsen, A. J. Studer, J. R. Manuel and J. A. Kimpton: Metall. Mater. Trans. B, 2014, vol. 45, pp. 2097-105.

    Article  Google Scholar 

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The project is financially supported by a BlueScope Steel Metallurgical Centre Projects Grant. The authors acknowledge the permission for the use of SEM JEOL JSM-6490LV facility at the UOW Electron Microscopy Centre.

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Correspondence to Guangqing Zhang.

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Manuscript submitted March 15, 2016.

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Wang, Z., Pinson, D., Chew, S. et al. Effect of Addition of Mill Scale on Sintering of Iron Ores. Metall Mater Trans B 47, 2848–2860 (2016).

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