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A method was set up for producing and collecting different types of chars under various operating conditions similar to those existing in the blast furnace, in particular with high coal injection rates. A laboratory test was developed to quantify the reactivity of chars with the bosh slag. It was found that the chars reactivity differs from those of coke with similar size distribution and that it depends on the production conditions (coal rate, oxygen enrichment of blast, residence time of particles). A second laboratory test measures the reactivity of chars with the bosh metal. It shows that, under pulverulent state, chars, as well as coke, carburize the metal only very little. When agglomerated with 10% bentonite, the same materials carburize the metal till near saturation, as a coke lump does. The consequences of these observations are analysed in relation to high injection rates in the blast furnace.

Additional information

Authors: PONGHIS N, Centre de recherches metallurgiques, Liège (BE);DANLOY G, Centre de recherches metallurgiques, Liège (BE)
Bibliographic Reference: EUR 16652 FR (1997) 64pp., FS, ECU 11.50
Availability: Available from the (2)
ISBN: ISBN 92-828-0824-6
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