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  • Influence of the intrinsic properties of iron ores and fluxes and of the sintering conditions on the behaviour of the granulated blend during drying and under thermal shock

Abstract

At present, the grate sintering process for iron ore is undergoing important changes induced by the need to reduce the heat consumption, to use fine or ultrafine ores, and to produce more reducible sinters with a higher iron content. One important step has not yet been investigated: it concerns the behaviour of the green micropellets and granules during the drying phase and under the influence of thermal shocks caused by the rapid heating. The production of a granulated blend with a high cold permeability is not a sufficient condition to obtain good sinter performances because the behaviour of the micropellets and granules submitted to the heat wave (drying and thermal shock) influences the hot permeability and thus the sinter speed, the thermal profile, the strand productivity and the product quality. The research characterises the behaviour of the granulated blend during drying and under thermal shock and assesses the conditions required in the sintering operation to optimise this behaviour.

Additional information

Authors: VIDAL R, Centre de Recherches Métallurgiques, Liège (BE)
Bibliographic Reference: EUR 14130 FR (1992) 66 pp., FS, ECU 9
Availability: (2)
ISBN: ISBN 92-826-3987-8
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