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The present investigation is aimed at assessing and controlling the change of coke size distribution from the coke plant wharf to the hearth of the blast furnace. According to previous investigations the size distribution of coke can be described using the Rosin Rammler distribution law. It is possible to estimate the size distribution of coke at every point along the transportation line from coke plant to blast furnace stock line. The general nature of the model has been assessed; it has been established that the form of the relationships remains valid as coke quality is modified. A model has been developed for computing the estimated coke size distribution at stock line level. The actual coke degradation occurring in the blast furnace has been evaluated. A further model of coke size degradation has been established. The calculated size reduction by carbon solution loss is only 2 mm to 3 mm. It is necessary to consider other degradation processes, in addition to gasification, to account for the actual size degradation of coke. Nevertheless, the present mode allows us to establish the relationships between size reduction inside the furnace and coke quality.

Additional information

Authors: NEGRO P, Institut de recherches de la sidérurgie française, Maizières-les-Metz (FR)
Bibliographic Reference: EUR 16032 FR (1997) 80pp., FS, ECU 13.50
Availability: Available from the (2)
ISBN: ISBN 92-828-0259-O
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