EVALUATION OF THE TEMPERATURE CONDITIONS OF SERVICE OF METALLURGICAL MACHINERY ROLLS AT SCALING
https://doi.org/10.17073/0368-0797-2016-7-465-469
Abstract
The use of brackish water for indoor cooling of rollers of metallurgical machines leads to the formation of scale on the inner surface of the cooling channel. When forecasting the temperature conditions of service of rollers, the fact that in the initial period of operation of the roller cooling channel is clean and in working conditions dramatically different from those of the final period of operation, is usually not taken into account. Continuously increasing layer of scum on the surface of the cooling channel, which has high mechanical properties and low coefficient of thermal conductivity, causes a rise in temperature of the working surface to the tempering temperature of the material of metallurgical machinery rollers. The aim of this work was to study the temperature conditions of service of metallurgical machinery rollers at scale formation in the cooling channel surface. The authors have proposed a method of estimating the temperature conditions of service of metallurgical machinery rollers for this case. For example, the estimation for roller of continuous casting machine has shown that for selected operating conditions the maximum temperature of the roller outer surface reaches its critical value after six months of work of metallurgical machines. The technique allows a differentiated approach to the definition of average and maximum temperature of the surface of the rollers in view of the magnitude and nature of the heat load, cooling conditions, and scale formation on the heat transfer surface. It can serve as a basis for definition of rollers operation life and rational consumption of reagents for the preparation of cooling water.
About the Authors
N. V. Telin
Cherepovets State University, Cherepovets, Russia
Russian Federation
Russian Federation
Professor of the Chair “Thermal Power and Heat Engineering”
N. N. Sinitsyn
Cherepovets State University, Cherepovets, Russia
Russian Federation
Russian Federation
Dr. Sci. (Eng.), Professor of the Chair “Thermal Power and Heat Engineering”
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Review
For citations:
Telin N.V., Sinitsyn N.N. EVALUATION OF THE TEMPERATURE CONDITIONS OF SERVICE OF METALLURGICAL MACHINERY ROLLS AT SCALING. Izvestiya. Ferrous Metallurgy. 2016;59(7):465-469. (In Russ.) https://doi.org/10.17073/0368-0797-2016-7-465-469
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