Assessment of the State of the Blast Furnace High Temperature Region by Tuyere Core Drilling

A1 Journal article (refereed)

Internal Authors/Editors

Publication Details

List of Authors: Helle M, Saxen H, Kerkkonen O
Publication year: 2009
Journal: Isij International
Journal acronym: ISIJ INT
Volume number: 49
Issue number: 2
Start page: 203
End page: 209
Number of pages: 7
ISSN: 0915-1559


Tuyere core drillings give a unique opportunity to probe the blast furnace and detect changes in both physical and chemical conditions of its high-temperature region. In this paper the findings from drill cores taken from a blast furnace are used to characterize the internal state of the furnace hearth, quantified by an erosion model estimating the available hearth volume. The complex relation is studied by entertaining neural network models using different combinations of inputs consisting of the extent of the distinct tuyere-level zones (raceway, bird's nest, dead man, etc.) of the core samples. The resulting model can be used to gain knowledge of the relation between tuyere level conditions and hearth states, and to classify the findings from future core drillings. The results also throw light on possible reasons for thermal cycles observed in the hearth of the furnace studied.


blast furnace, hearth state, neural network pruning, tuyere core drillings

Last updated on 2019-20-10 at 04:17

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