Numerical Simulation of the Effects of Electromagnetic Brake on Steel Flow in the Mold of Thin Slab Caster

摘要

As mold is the final step in the process of steel purity control, the fluid field inside it is considered to have paramount importance on the quality of casting blank. That is not only because mold is taking in charge of the separation of inclusions and slag entrapment prevention, but also related to the uniformity in initial solidification of the shell, steel breakout prevention as well as the surface crack generation. Thus, research and optimization on fluid field in mold have significant meanings on inclusion separation and slag entrapment prevention [1-3]. Electromagnetic Brake (EMBR), a novel technique employed magnetostatic field, can be used to improve the quality of the casting blank by retarding fluid velocity and level fluctuation control in the mold. The technique will give molten steel fluid a reversed electromagnetic force, as induced current is generated in molten steel by the movement of fluid across magnetostatic field. In this paper, flow characteristics of liquid steel in a thin slab continuous casting mold under EMBR is investigated by employing three-dimensional numerical simulation. Magnetic field distribution is described as well.