Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Heat Transfer Modelling of a Blast Furnace Hearth
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.
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.

Place, publisher, year, edition, pages
2010. Vol. 81, no 3, 186-196 p.
Keyword [en]
Blast furnace, modelling, heat transfer, hearth, measurements, STATE, TEMPERATURE, OPERATION
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-13962DOI: 10.1002/srin.200900145ISI: 000276297800003Scopus ID: 2-s2.0-77952124378OAI: oai:DiVA.org:kth-13962DiVA: diva2:328729
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
In thesis
1. A Study of the Heat Flow in the Blast Furnace Hearth Lining
Open this publication in new window or tab >>A Study of the Heat Flow in the Blast Furnace Hearth Lining
2010 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The aim of the present thesis was to study the heat flows in the blast furnace hearth lining by experimental measurements and numerical modeling. Thermocouple data from an operating furnace have been used throughout the work, to verify results and to develop methodologies to use the results in further studies. The hearth lining were divided into two zones based on the thermocouple readings: a region with regular temperature variations due to the tapping of the furnace, and another region with slow temperature variations. In an experimental study, the temperatures of the outer surfaces of the wall and bottom were measured and compared with lining temperature measured by thermocouples. Expressions to describe the outer surface temperature profiles were derived and used as input in a two-dimensional steady state heat transfer model. The aim of the study was to predict the lining temperature profiles in the region subjected to slow temperature variations. The methodology to calculate a steady state lining temperature profile was used as input to a three-dimensional model. The aim of the three-dimensional model was primarily to study the region with dynamic lining temperature variations caused by regular tappings. The study revealed that the replacement of original lining with tap clay has an effect when simulating the quasi-stationary temperature variations in the lining. The study initiated a more detailed study of the taphole region and the size and shape of the tap clay layer profile. It was concluded, that in order to make a more accurate heat transfer model of the blast furnace hearth, the presence of a skull build-up below the taphole, erosion above the taphole and the bath level variations must to be taken into consideration.

Place, publisher, year, edition, pages
Stockholm: KTH, 2010. xiv, 51 p.
Keyword
Blast furnace, heat transfer, mathematical model, experimental
National Category
Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:kth:diva-13163 (URN)978-91-7415-677-5 (ISBN)
Public defence
2010-06-11, F3, Lindstedtsvägen 26, KTH, Stockholm, 13:00 (English)
Opponent
Supervisors
Note
QC 20100706Available from: 2010-05-31 Created: 2010-05-31 Last updated: 2010-12-03Bibliographically approved
2. An Experimental and Numerical Study of the Heat Flow in the Blast Furnace Hearth
Open this publication in new window or tab >>An Experimental and Numerical Study of the Heat Flow in the Blast Furnace Hearth
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
Blast furnace, hearth, heat transfer, model, experimental, numerical
National Category
Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:kth:diva-9922 (URN)978-91-7415-201-2 (ISBN)
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

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Swartling, MariaTilliander, AndersJönsson, Pär
By organisation
Applied Process Metallurgy
Metallurgy and Metallic Materials

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 97 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf