Simulating the magnetic field/transfer phenomenon of the tundish with channel type inducting heating

摘要

The tundish with channel type inducting heating is usually used to stabilize the superheat of molten steel, and remove the non-metallic inclusions. In order to research the transfer characteristics comprehensively, A mathematical model including electromagnetic field, flow and heat transfer is established to investigate the distribution of magnetic flux density, electromagnetic force (EMF), joule heat, flow and temperature field. The results indicate that the effective area of electromagnetic field mainly contains the channels, moreover, the region near the side walls contacting with channels also belongs to it. Therefore, the EMF generated in this area affects the flow pattern in pouring chamber and distribution chamber, and the pinch force produced in the channels also makes the molten steel rotate strongly. A comparison of flow field between the tundishs with and without induction heating implies that compared with the EMF, the thermal buoyancy has little influence on the flow of molten steel. The joule heat mainly distributes in the channels and accounts for 91.68%. Besides, after the induction heating being applied, the thermal drop can be compensated, and the temperature distribution gets more homogeneous.