Increasing the Efficiency of Refining Rail Steel in Intermediate CCM Ladles Based on Rational Organization of Hydrodynamic Processes.

Autor: Protopopov, E. V., Chislavlev, V. V., Temlyantsev, M. V., Golovatenko, A. V.
Zdroj: Steel in Translation; May2020, Vol. 50 Issue 5, p283-288, 6p
Abstrakt: The quality and performance of rails determine their service life. The main parameters determining the steel quality are chemical heterogeneity and non-metallic inclusions in the metal. The homogenization efficiency of the metal melt and its refining from non-metallic inclusions in the ladle of the continuous casting machine (CCM) is largely determined by the organization of hydrodynamic processes, the internal geometry of the ladle, and the presence of additional refractory elements. The effect of additional refractory elements of various configurations of a ladle on the melt movement processes is studied using physical and mathematical modeling. Physical modeling of hydrodynamic processes in the ladle with allowance for the compliance with similarity conditions is performed using a specially created laboratory-experimental complex. Numerical experiments were carried out by the methods of computational fluid dynamics (finite volumes) using a three-dimensional turbulent mathematical model with a single-phase representation of the metal melt flow in a ladle. To estimate the efficiency of melt homogenization based on the results of physical and mathematical modeling, a new method is developed based on the analysis of the residence time distribution of a liquid in a continuous flow reactor. An internal volume configuration of a four-strand CCM ladle is proposed based on the experimental results. A design that provides effective homogenization of the rail steel melt and its refining from non-metallic inclusions is considered. The design of full-profile partitions, which ensure rational organization of melt flows, its homogenization and effective refining of rail steel from non-metallic inclusions in the ladle, was developed and tested under industrial conditions. Industrial research was performed under the conditions of a four-strand CCM no. 1 of the electric steel-making shop at the JSC EVRAZ ZSMK. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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