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Coke and Coal in the Changing Technology of the Blast Furnace

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Coke Oven Techniques

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Summary

The steadily rising cost of hydrocarbons in relation to coal has resulted in a rapid shift towards coke- and coal- fuelled blast furnace operations. This trend has been associated with the most recent developments in blast furnace technology, i.e. the revolving chute charging system and the use of blast temperatures over 1200°C. The role of coke characteristics is discussed in the context of the need for continuous refinement of blast furnace technology. The importance of the following points is stressed: use of the size distribution of the coke in order to form charge layers varying in permeability along the radius of the blast furnace and to influence the shape of the melting zone; coke reactivity and coke size degradation as it descends down the blast furnace; knowledge of the links between the parent coals, the coking conditions and the coke structure. The characteristics of formed coke can be controlled during the production process and can, therefore, be adapted to the utilization process. As regards the replacement of fuel oil injection, the problems connected with rapid coal combustion in the tuyeres are examined. An examination is also made of the possibilities offered by the new coal-oil-mixtures (COM) and coal-water-mixtures (CWM), which are still a field for research. Coal-water-mixtures would also make it possible greatly to simplify injection equipment for blast furnaces.

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Authors and Affiliations

  1. Centro Sperimentale Metallurgico SpA, Italy

    G. Sironi (Director)

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  1. G. Sironi
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© 1982 ECSC, Luxembourg

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Sironi, G. (1982). Coke and Coal in the Changing Technology of the Blast Furnace. In: Coke Oven Techniques. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-7367-1_3

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  • DOI: https://doi.org/10.1007/978-94-009-7367-1_3

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-0-86010-366-0

  • Online ISBN: 978-94-009-7367-1

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