Electromagnetic Transfer and Circulation (ETAC) of Molten Aluminum Metal and Its Alloys

Electromagnetic (EM) fields can have a significant influence on the behavior of molten aluminum and its alloys, and are today used to pump, circulate and transfer metal using Electro Magnetic Pumps (EMP) or to homogenize the metal in the furnace using Under Floor Stirrers (UFS). The present paper discussed the newly developed Electromagnetic Transfer and Circulation (ETAC) system, which applies the same fundamental physics. A unique characteristic of the ETAC, is that it combines the lower turbulence of the UFS with the high throughput of the EMP. This gives a large volume stream of metal (adjustable until up to 20 t/min) during circulation, alloying, homogenization and transferring metal. It also secures a lower surface/dross entrainment. The ETAC is fully adjustable in power and thrust ratios with less slip, making it suitable for almost all furnace operations and alloys at fairly low metal levels in the furnace.