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Final report on Contract No 7210-AA/320, 819, 138, 1 July 1995 to 30 June 1999.

The principal aims of this project were to study the blast furnace hearth and raceway behaviours in case of low coke and high coal rates operations. Using the tuyère coke sampling device, it has been established that:
- With coal injection rates ranging from 50 to 200 kg/thm, significant differences were apparent in the drill core structures.
- With high coal injection the raceway length becomes lower showing that the permeability of the dead man boundary also becomes lower.
- The fines sampled along the coal along the tuyère radius when using different coke qualities did not show any accumulation of coal in the dead man or at the outer shell of the dead man.
- The study of the unburnt char by sampling dust and emissions at different positions along the height at the wall and the radius at the top of the furnace when using different coke qualities showed very different results.

Additional information

Authors: NEGRO P, IRSID, Maizières-lès-Metz (FR);WILMERS R R, British Steel, Middelsborough (GB);GATHERWOOD D S, British Steel, Middelsborough (GB);BEPPLER E, VDEh, Dûsseldorf (DE);HARP G, VDEh, Dûsseldorf (DE)
Bibliographic Reference: EUR 20172 EN (2002), pp.309. Euro: 46.00
Availability: EUR-OP reference: KI-NA-20172-EN-S Available from EUR-OP sales agents. URL:
ISBN: ISBN: 92-894-3162-8
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