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Journal of the Southern African Institute of Mining and Metallurgy

versión On-line ISSN 2411-9717
versión impresa ISSN 0038-223X

J. S. Afr. Inst. Min. Metall. vol.110 no.8 Johannesburg ago. 2010




Investigation into how the magnesia, silica, and alumina contents of iron ore sinter influence its mineralogy and properties



M.K. KalengaI; A.M. Garbers-CraigII

IDepartment of Extraction Metallurgy, Faculty of Engineering, the Built Environment, University of Johannesburg, South Africa
IIDepartment of Materials Science and Metallurgical Engineering, Faculty of Engineering, the Built Environment and Information Technology, University of Pretoria, South Africa




The influence of varying amounts of magnesia, silica, and alumina in iron ore sinter on its mineralogy, reducibility index (RI), reduction disintegration index (RDI), physical breakdown (AI and TI), and production properties (coke breeze rate) were examined.
It was found that the mineralogy of iron sinter can more easily be predicted from its chemical composition than from the RI, RDI, AI or TI. Anticipating the consequence that varying amounts of MgO and SiO2 would have on sinter properties is complex, and not necessarily predictable. High concentrations of Al2O3 in the sinter result in high concentrations of the SFCA phase, but with drastically deteriorated properties. This study also confirmed that the form in which fluxes are added to the raw material sinter mixture affects the mineralogy and properties of the produced sinter.

Keywords: Iron sinter, mineralogy, reducibility, reduction degradation, abrasion index, tumble index



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1. HSIEH, L.H. and WHITEMAN, J.A. Sintering conditions for simulating the formation of mineral phases in industrial iron ore sinter. ISIJ International, 1989. vol. 29, pp. 24-32.         [ Links ]

2. CHAIGNEAU, R. and HEEREMA, R.H. Calcium ferrites and the diversity in their reduction behaviour. Ironmaking Conference Proceedings, Toronto, 1992. pp. 111-120.         [ Links ]

3. EGUNDEBI, G.O. and WHITEMAN, J.A. Evolution of microstructure in iron ore sinter. Ironmaking and Steelmaking, 1989. vol. 16, pp. 379-385.         [ Links ]

4. PAL, S., CHANDRA, N., MISHRA, U.N., SINGH, R.N., and MEDIRATTA, S.R. Effect of mineralogical composition of iron-bearing materials on softeningmelting properties. CSTI Ironmaking Conference Proceedings, 1998. pp. 1615-1635.         [ Links ]

5. HSIEH, L.H. Effect of raw material composition on the sintering properties. ISIJ International, 2005. vol. 45, pp. 551-559.         [ Links ]

6. CHOUDARY, M.K. and NANDY, B. Effect of flame front speed on sinter structure of high alumina iron ores. ISIJ International. 2006, vol. 46, pp. 611-613.         [ Links ]

7. PIMENTA, H.P. and SESHADRI, V. Characterisation of structure of iron ore sinter and its behaviour during reduction at low temperatures. Iron and Steelmaking, 2002. vol. 29, pp. 169-174.         [ Links ]

8. BRISTOW, N.J. and WATERS, A.G. Role of SFCA in promoting hightemperature reduction properties of iron ore sinters. Mineral Processing and Extractive Metallurgy (Trans. IMM C), 1991. vol.100, pp. C1-C10.         [ Links ]

9. MAEDA, T., NISHIOKA, K., NAKASHIMA, K., and SHIMIZU, M. Formation rate of calcium ferrite melt focusing on SiO2 and Al2O3 components. ISIJ International, 2004. vol. 44, pp. 2046-2051.         [ Links ]

10. HIGUCHI, K., NAITO, M., NAKANO, M., and TAKAMOTO, Y. Optimization of chemical composition on microstructure of iron ore sinter for lowtemperature drip of molten iron with high permeability. ISIJ International, 2004. vol. 44, pp. 2057-2066.         [ Links ]

11. LOO, C.E. and LEUNG, W. Factors influencing the bonding phase structure of iron ore sinters. ISIJ International, 2003. vol. 43, pp. 1393-1402.         [ Links ]

12. MACHIDA, S., MUSHIRO, K., ICHIKAWA, K., NODA, H., and SAKAI, H. Experimental evaluation of chemical composition and viscosity of melts during iron ore sintering. ISIJ International, 2005. vol. 45, pp. 513-521.         [ Links ]

13. POWNCEBY, M.I. and CLOUT, J.M.F. Importance of fine ore chemical composition and high temperature phase relations: Applications to iron ore sintering and pelletising. Mineral Processing and Extractive Metallurgy (Trans. IMM C), 2003. vol. 12, pp. 44-51.         [ Links ]

14. MATSUMURA, M., HOSHI, M., and KAWAGUCHI, T. Improvement of sinter softening property and reducibility by controlling chemical compositions. ISIJ International, 2005. vol. 45, pp. 594-602.         [ Links ]

15. GOLDRING, D.C., JUKES, L.M., and FRAY, T.A.T. Characterisation of Iron Ore Sinter from its Mineralogy. Institute of Chemical Engineers, 5th International Symposium on Agglomeration, Brighton, UK, 25-27 September 1989. pp. 425-429.         [ Links ]

16. KASAI, E., RANKIN, W.J., LOVEL, R.R., and OMORI, Y. An Analysis of the Structure of Iron Ore Sinter Cake, ISIJ International, 1989. vol. 29, pp. 635- 641.         [ Links ]



Paper received Nov. 2008
Revised paper received Jun. 2010

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