ESTIMATION OF HYDRODYNAMIC FACTORS FOR INCREASING THE EFFICIENCY OF THE STEEL CASTING AT THE MULTISTRAND BILLET CCM
Keywords:
billet CCM, compactness of the open jet, the surface defects, the emergency breakout, exogenous nonmetallic inclusions, turbulent vortex structures, nozzles, autostart, tundish lining schemeAbstract
Stably compact nature of the outflow of an open metal jet from the tundish to the mould at the billet CCM is one of the conditions for achieving high rates of casting seriality, the quality of billets, minimization of metal losses and production costs. The publication presents the results of industrial studies of causes and factors that affect the hydrodynamics of an open jet, as well as recommendations for its stabilization. It is shown that casting speed is the most significant factor affecting the frequency of occurrence of «harp» jet cases. Therefore, in order to increase the productivity of the billet CCM, due to the maximum possible increase in the casting speed, it is also necessary to implement the proposed recommendations.
References
Smirnov, A., Kuberskii, S., Podkorytov, A. et al. (2012) Nepreryvnaya razlivka sortovoy zagotovki Continuous casting of billets. Donetsk: Tsifrovaya tipografiya, 417 p. [in Russian].
Smirnov, A.N., Shtepan Ye.V., Kas'yan G.I. et al. (2004). Technological development of the highspeed steel casting parameters at billet. Metallurgicheskaya i gornorudnaya promyshlennost', issue 8, pp. 140–143 [in Russian].
Pisarskii, S.N. Smirnov, A.N. Lavrenko, D.A. et al. (2018) Otsenka tekhnologicheskikh vozmozhnostey stabilizatsii skorosti razlivki otkrytoy struyey na sovremennoy sortovoy MNLZ. Soobshcheniye Estimation of technological possibilities of the speed stabilization of casting by open jet on modern billet CCM. Report 1. Metall i lit'ye Ukrainy [Metal and casting of Ukraine, issue 3–4, pp. 22–27 [in Russian].
Pisarskii, S.N. Smirnov, A.N. Lavrenko, D.A. et al. (2018) Estimation of technological possibilities of the speed stabilization of casting by open jet on modern billet CCM. Report 2. Metall: lit’ye Ukrainy, issue 5–6 [in Russian].
Yeron'ko, S.P., Smirnov, A.N., Yakovlev D.A. et al. (2006) Sovershenstvovaniye konstruktsii ustroystva dlya bystroy smeny stakanov-dozatorov promkovsha MNLZ [Improving the structure of the device for quick change of the CCM tundish nozzles]. Metallurgicheskaya i gornorudnaya
promyshlennost', issue 8, pp. 107–109 [in Russian].
Novokshchenova, S.M., Vinograd, M.I. (Eds.). (1984) Defects of steel. Moscow: Metallurgiia, 199 p. [in Russian].
Loytsyanskiy, L. (1978) Mechanics of fluid and gas. Moscow: Nauka, 736 p. [in Russian].
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2018 С. М. Писарський, О. М. Смірнов*, Д. В. Рябий **
This work is licensed under a Creative Commons Attribution 4.0 International License.
