A large variety of precesses involving electromagnetic field are currently in use in foundries around the world. Electromagnetic continuous casting(EMC) is a novel continuous casting technique which utilize electromagnetic force, generated from the interaction of the electromagnetic field and the induced current in the melt, to maintain the melt in a free surface shape. Hence, it is important to know the effect of the electromagnetic field on the free surface shape of melt.
In this study tin was used which has the similar density and electroconductivity to steel. High frequency (2.5kHz) coil current was calculated with the measurement of the electromotive force in a solenoid probe. The effect of the elctromagnetic field on the melt shape was numerically analysed. The analysed results were compared with experimental result under the variations of charge mass and coil current. The influence of the cross section shape and inner diameter of the coil was studied. Also the induction heating rate were calculated for melt ranging from conductors to semiconductors and ceramics.
It has been shown that the coil which has an inclined angle(20˚ - 45˚) cross section was more suitable for electromagnetic casting than the rectangular cross section. The inclined angle cross section play a role of screen in Russian type with less power dissipation. The analysed results were in good agreement with experimental results. The turbulent fluid flow in melt cause free surface oscillation and contact to the coil wall.
