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Long blast furnace life reduces pig iron operating costs. The actual target is to reach 15 years campaign life, as compared to roughly 10 years at the present time. In order to prevent shaft wear, it is necessary to operate the furnace with low heat losses, and without scaffold build-up. Similarly, the hearth life may be increased through proper cooling throughout the whole campaign. In the shaft the most important mechanism is the building and removal of scaffolds. The present analysis makes it possible to calculate from the temperature of stave coolers, or refractories, the thickness of the layer of adhering materials on the hot side. The numerical heat transfer model MOTHUS shows the location of the isotherms in the hearth walls. It automatically analyses the output from the numerous thermocouples that are now arranged in the hearth refractories of modern blast furnaces. The view given by the model quantifies the length of the sound carbon refractory during operation. This model provides a more efficient monitoring of the hearth during the campaign.

Additional information

Authors: PICARD M, European Commission, Bruxelles (BE);TÉMOIN F, European Commission, Bruxelles (BE)
Bibliographic Reference: EUR 14980 FR (1995) 67 pp., FS, ECU 10
Availability: (2)
ISBN: ISBN 92-827-4680-1
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