Investigation of the slab heating characteristics in a reheating furnace with the formation and growth of scale on the slab surface |
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| Authors: | Jung Hyun Jang Dong Eun Lee Man Young Kim Hyong Gon Kim |
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| Affiliation: | 1. Department of Aerospace Engineering, Chonbuk National University, Chonbuk 561-756, Republic of Korea;2. CAMSTech Co., Ltd., Chonbuk 561-844, Republic of Korea;1. LAETA, IDMEC, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal;2. Department of Mechanical Engineering, Indian Institute of Technology Delhi, New Delhi 110016, India;1. Automation and Control Institute, Vienna University of Technology, Gußhausstraße 27–29, 1040 Wien, Austria;2. Aktiengesellschaft der Dillinger Hüttenwerke, Werkstrasse 1, 66763 Dillingen/Saar, Germany;1. Institute of Thermal Engineering, Graz University of Technology, Inffeldgasse 25B, 8010 Graz, Austria;2. Voestalpine Tubulars GmbH & Co KG, Alpinestraße 17, 8652 Kindberg, Austria;1. Industrial Engineering School, University of Vigo, Lagoas-Marcosende, s/n 36310 Vigo, Spain;2. AIMEN, Relva, 27 A. Torneiros, 36410 Porriño, Pontevedra, Spain |
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| Abstract: | In this work, the development of a mathematical heat transfer model for a walking-beam type reheating furnace is described and preliminary model predictions are presented. The model can predict the heat flux distribution within the furnace and the temperature distribution in the slab throughout the reheating furnace process by considering the heat exchange between the slab and its surroundings, including the radiant heat transfer among the slabs, the skids, the hot combustion gases and the furnace wall as well as the gas convection heat transfer in the furnace. In addition, present model is designed to be able to predict the formation and growth of the scale layer on the slab in order to investigate its effect on the slab heating. A comparison is made between the predictions of the present model and the data from an in situ measurement in the furnace, and a reasonable agreement is found. The results of the present simulation show that the effect of the scale layer on the slab heating is considerable. |
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