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The influence of the gangue grain size distribution and of the mineralogical nature of the iron ores and their blends, on the sintering process, and on the sinter quality, has been tested. For this purpose, a wide range of iron ores utilised in European steel works were used, determining their physical, chemical and mineralogical characteristics.

To obtain both the same grain size and the same chemical composition of the different mixtures tested belonging to different mineralogical families, the ores as received, and selected fractions of them, were utilised. In this way mixtures with a different distribution of SiO(2) in the grain spectrum were made, adding equal quantities of additives and of return fines and different percentages of coke to the mixtures themselves, in order to maintain constant the equilibrium of return fines, the mechanical strength of the sinter and the level of the sinter oxidation. Analytical determination of mineralogical phases of the raw materials and of the sinter were obtained by carrying out accurate microscopic analyses. Finally, the possible correlation between the ores main characteristics on the one hand, and the sintering process parameters and the sinter quality on the other, were investigated on an industrial scale. .

Additional information

Authors: PINTI M, Centro Sviluppo Materiali SpA, Roma (IT);SCARTON A, Centro Sviluppo Materiali SpA, Roma (IT);GELLI J, Centro Sviluppo Materiali SpA, Roma (IT)
Bibliographic Reference: EUR 16079 IT (1997) 74pp., FS, ECU 13.50
Availability: Available from the (2)
ISBN: ISBN 92-828-1021-6
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