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Proceedings Paper

Application of on-line infrared thermography in steel making industry
Author(s): M. Viale; O. Martin; F. Muratori; U. Bertezzolo; J. Perez; J. Usart
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Paper Abstract

This work is about three real applications in the steel industry where the infrared technology is used to control the process and to increase safety. All the applications where developed by Ternium-Siderar automation group. The main objectives are to use the infrared thermography in steel plant are to reduce production costs and to prevent mayor damages. The first work is about automatic slag detection during the tapping operation of the Blast Oxygen Furnace (BOF) converters by thermographical image processing. The benefit is to reduce fluxes due to less slag carryover and also to eliminate the ladle recirculation for excessive slag. Additionally, the steel shop process engineers are using the camera information to estimate some other process variables. There is a project to make all the BOF tapping fully automatic, using the camera information. The second work is about on-line ladle hot spot detection. A failure of the ladle refractory bricks may cause damages in the ladle car, mechanical equipment, and cabling in the ladle furnace. To detect these failures, a system of four infrared cameras with an image processing software was developed. Also in future applications, the thermal information is going to be used for data correlation with other process variables. The third one is in the sinter plant, where the camera temperature information is used to optimize the process control. Before the system installation, there was no available information about the sinter material temperature. Nowadays there is an on-line information that is used to close the control loop.

Paper Details

Date Published: 9 April 2007
PDF: 11 pages
Proc. SPIE 6541, Thermosense XXIX, 65410H (9 April 2007);
Show Author Affiliations
M. Viale, Ternium-Siderar (Argentina)
O. Martin, Ternium-Siderar (Argentina)
F. Muratori, Ternium-Siderar (Argentina)
U. Bertezzolo, Ternium-Siderar (Argentina)
J. Perez, Ternium-Siderar (Argentina)
J. Usart, Ternium-Siderar (Argentina)

Published in SPIE Proceedings Vol. 6541:
Thermosense XXIX
Kathryn M. Knettel; Vladimir P. Vavilov; Jonathan J. Miles, Editor(s)

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