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An Experimental and Numerical Study of the Heat Flow in the Blast Furnace Hearth
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Process Metallurgy.
2008 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

This study has focused on determining the heat flows in a production blast furnace hearth. This part of the blast furnace is exposed to high temperatures. In order to increase the campaign length of the lining an improved knowledge of heat flows are necessary. Thus, it has been studied both experimentally and numerically by heat transfer modeling. Measurements of outer surface temperatures in the lower part of a production blast furnace were carried out. In the experimental study, relations were established between lining temperatures and outer surface temperatures. These relations were used as boundary conditions in a mathematical model, in which the temperature profiles in the hearth lining are calculated. The predictions show that the corner between the wall and the bottom is the most sensitive part of the hearth. Furthermore, the predictions show that no studied part of the lining had an inner temperature higher than the critical temperature 1150°C, where the iron melt can be in contact with the lining.

Place, publisher, year, edition, pages
Stockholm: KTH , 2008. , xii, 32 p.
Keyword [en]
Blast furnace, hearth, heat transfer, model, experimental, numerical
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-9922ISBN: 978-91-7415-201-2 (print)OAI: oai:DiVA.org:kth-9922DiVA: diva2:158747
Presentation
2009-02-05, B2, Brinellvägen 23, Stockholm, 10:00 (English)
Opponent
Supervisors
Note
QC 20101124Available from: 2009-02-04 Created: 2009-02-04 Last updated: 2010-11-24Bibliographically approved
List of papers
1. Experimentally determined heat flows in a blast furnace hearth
Open this publication in new window or tab >>Experimentally determined heat flows in a blast furnace hearth
(English)Manuscript (preprint) (Other academic)
Keyword
Blast furnace, hearth, temperature, measurements, lining, surface
National Category
Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:kth:diva-26367 (URN)
Note
QC 20101124Available from: 2010-11-24 Created: 2010-11-24 Last updated: 2010-11-24Bibliographically approved
2. Heat Transfer Modelling of a Blast Furnace Hearth
Open this publication in new window or tab >>Heat Transfer Modelling of a Blast Furnace Hearth
2010 (English)In: STEEL RES INT, ISSN 1611-3683, Vol. 81, no 3, 186-196 p.Article in journal (Refereed) Published
Abstract [en]

This paper describes the development of a heat transfer model with the purpose of studying the heat flows in the hearth of an operating blast furnace. Temperature profiles were calculated for a period of time to study the transition from steady blast furnace operation to an unsteady period, and back to a steady period. This total time period had the highest lining temperatures registered since the beginning of the current campaign. It was concluded that no part of the lining had an inner temperature higher than the critical temperature of 1150 degrees C. Thus, no refractory could have been in direct contact with slag or iron. The corner between the wall and the bottom was identified to be the most sensitive part of the lining. It is suggested that thermocouples are installed in this area, to improve the temperature control.

Keyword
Blast furnace, modelling, heat transfer, hearth, measurements, STATE, TEMPERATURE, OPERATION
National Category
Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:kth:diva-13962 (URN)10.1002/srin.200900145 (DOI)000276297800003 ()2-s2.0-77952124378 (Scopus ID)
Note
QC 20100706 Tidigare titel: Heat transfer modeling of a blast furnace hearthAvailable from: 2010-07-06 Created: 2010-07-05 Last updated: 2010-11-24Bibliographically approved

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