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Experimentally determined temperatures in 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: Ironmaking & steelmaking, ISSN 0301-9233, E-ISSN 1743-2812, Vol. 37, no 1, 21-26 p.Article in journal (Refereed) Published
Abstract [en]

In this study temperature measurements have been carried out at blast furnace no. 2 at SSAB Oxelosund. The temperature was measured in the hearth lining and at the outer surfaces of the hearth wall and bottom. The lining temperature was measured using permanently installed thermocouples and surface temperatures were measured using a hand held thermocouple. The aims of the study were to find a correlation between lining and surface temperatures as well as to find a method to determine the surface temperature based on readings from lining thermocouples. The overall conclusion is that the bottom and wall surface temperatures can be determined based on lining temperatures.

Place, publisher, year, edition, pages
2010. Vol. 37, no 1, 21-26 p.
Keyword [en]
Blast furnace, Hearth, Temperature, Measurements, Lining, Surface, HEAT-TRANSFER, MODEL, STATE
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-13963DOI: 10.1179/030192309X12506804200627ISI: 000273918200004Scopus ID: 2-s2.0-77949444880OAI: oai:DiVA.org:kth-13963DiVA: diva2:328726
Note
QC 20100706Available from: 2010-07-06 Created: 2010-07-05 Last updated: 2017-12-12Bibliographically 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

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