REFRACTORIES IN HEATING UNITS
THE USE OF A THERMAL IMAGING SYSTEM TO MEASURE
THE TEMPERATURE OF THE BODY OF A HOT-METAL MIXER
Z. K. Kabakov
and D. V. Chudinov
Translated from Novye Ogneupory,No.5,pp.3–4,May,2013.
Original article submitted October 12, 2012.
Results are presented from the use of a thermal imaging system to evaluate the thermal state of a hot-metal
Key words: thermal imaging system, hot-metal mixer, lining.
Thermal imaging systems have begun to be used in
blast-furnace smelting to monitor the surface temperature of
the shell of the hot-metal mixer. The temperature distribution
is shown on the display of the system as a color field in
which each color corresponds to a certain temperature. As a
rule, the display shows the temperature field on the section of
the surface that is visible in the objective lens.
The “Severstal’” Metallurgical Plant uses a 600-ton-ca
pacity hot-metal mixer to transport molten pig iron from the
blast-furnace shop to the converter shop along a rail line. The
mixer is barrel-shaped and is lined internally with three lay-
ers of fireclay and mullite-corundum brick. Figure 1 shows a
schematic diagram of the mixer and its lining . Severstal’
uses a thermal imaging system made by the American com-
pany “Flir” to monitor the mixer’s thermal state. The system
shows the sections of the shell of the mixer on which the
temperature might be above or close to the limit allowed by
safety standards. It also shows section in which the shell or
Refractories and Industrial Ceramics Vol. 54, No. 3, September, 2013
1083-4877/13/05403-0149 © 2013 Springer Science+Business Media New York
Cherepovets State University, Cherepovets, Volgograd
Number of zone 12345678910
Temperature, °C 146 164.2 137.5 150.9 186.4 189.7 180.9 187 173.4 186.7
Number of zone 11 12 13 14 15 16 17 18 19 20
Temperature, °C 173.7 185.3 165.4 190.2 167.6 187.5 152.4 168.4 155.9 165.0
Fig. 1. Diagram of hot-metal mixer MP-600 and its lining: 1 ) shell of mixer; 2 ) fireclay brick installed in two layers; 3 ) mullite-corundum
brick; 4 ) small cylinder; 5 ) large cylinder; 6 ) high-rate-mixing zone.