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Interpretation of Tap Induced Cyclic Temperatures in the Blast Furnace Lining
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Process Metallurgy.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Process Metallurgy.ORCID iD: 0000-0003-1919-9964
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Process Metallurgy.
2012 (English)In: Steel Research International, ISSN 1611-3683, E-ISSN 1869-344X, Vol. 83, no 7, 695-704 p.Article in journal (Refereed) Published
Abstract [en]

The thermal behavior of the blast furnace hearth was studied using modeling. The focus was the effect of the size and shape of the taphole clay layer around the taphole. Four different cases have been calculated: one reference case and three cases with different taphole clay layer geometries. It was found that the calculated peak-to-peak amplitudes of the lining temperatures during the tap cycles at the location of a thermocouple can be approximated as a linear function of the taphole clay layer thicknesses for all calculated cases. Modeling was also done where both the 90th and the 10th percentile of the observed peak-to-peak values of the studied tap cycles were included to describe the behavior of the operating furnace. The taphole region can be divided into three categories based on how well the model can describe the measured process data: below, at, and above taphole level. Below the taphole level, the measured lining temperature variations are smaller than for the calculated results. At the taphole level, the model can describe the behavior well. Above the taphole level the measured lining temperature variations are larger than for the calculated results. It was concluded that in order to make a more accurate heat transfer model of the taphole region, the presence of a skull build-up below the taphole, erosion above the taphole, and the bath level variations need to be taken into account.

Place, publisher, year, edition, pages
2012. Vol. 83, no 7, 695-704 p.
Keyword [en]
blast furnace, mathematical model, dynamic heat transfer, taphole, tap cycles, taphole clay
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-99414DOI: 10.1002/srin.201100204ISI: 000305967700010Scopus ID: 2-s2.0-84863658905OAI: oai:DiVA.org:kth-99414DiVA: diva2:542302
Note
QC 20120731Available from: 2012-07-31 Created: 2012-07-30 Last updated: 2017-12-07Bibliographically approved

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