Physical Model of a Double-Chamber Tundish with Magnetic Stirring

Processy litʹâ, 2019, Tom 137, №5, p.3-10

Abstract

Received 20.08.2019

UDK 537.84:669:621.74

In world practice, there is a tendency to create metallurgical micro-mill, which have fundamental differences in technological terms in comparison with mini-plaants and traditional metallurgical plants. The technological chain of such microstage-production excludes out-of-furnace metal processing between the smelting unit and casting due to the small volume of furnaces. In this regard, the intermediate ladle of continuous (CCM) or semi-continuous (SCCM) casting machines undergoes significant structural changes associated with the transfer of part of the steel processing operations to the casting site. In this regard, there is a need to study the processes of metal outflow in the intermediate ladles of continuous casting and continuous casting machines used in modern metallurgical micro-plants. The physical model was developed and a choice of working media was made that provides a combined assessment of the dynamics of the outflow of flows inside a twochamber tundish using electromagnetic stirring, which is used in continuous casting machines and continuous casting machines in a modern micro-plants. The choice of two-chamber tundishes for metallurgical micro-plants explains the need to separate part of the technological operations inside the tundish. Also, the technology of rotational movement of flows in the centrifugal chamber of the tundish has certain advantages over other methods, which include high processing efficiency in terms of removing non-metallic inclusions, reliable operation and ease of maintenance, and also allows you to adapt this technology to the conditions of operating tundishes of continuous casting machines, SCCM. The developed physical model makes it possible to evaluate the efficiency of using various designs of metal detectors, to evaluate the nature of the rotation of the modeling fluid in the chamber with a change in the rotation speed and the position of the force application zone, and also to evaluate the residence time and removal efficiency of various inclusions. The physical model is made of organic glass, which makes it possible to visualize the characteristic stages of the observed processes.