Electromagnetic equipment for non-contacting treatment of liquid metal in metallurgical processes

A. Lehman¹ - O. Sjoden¹ - A. Kuchaev²

¹ ABB Automation Technologies AB, Terminalv˜agen 24, SE­721 59, V˜asteršas, Sweden
² Physico­Technological Institute of Metals and Alloys of the NAS of Ukraine, 34/1 Vernadsky Avenue, Kyiv­142, GSP, 03680, Ukraine

Abstract
Electromagnetic stirring improves metal quality, productivity and reduces costs in con­ tinuous casting. For each application, the optimum stirrer choice can be made taking into account the steel grade cast, the strand sizes, casting speed, reduction ratio, tem­ perature. Electromagnetic braking reduces the rate of metal flow in a mould, which in turn reduces breakouts and cracks, as well as surface and subsurface defects in slab cast­ ing. Electromagnetic stirring in ladle furnaces gives an improved chemical and thermal homogenisation, increased productivity and a superior steel cleanliness. Figs 10, Refs 6.