Patent ID: 8658084

Claim:
A method for regulating the flow rate and for slowing down a non-ferromagnetic melt streams with magnetic fields when tapping metallurgical containers such as blast furnaces and melt furnaces, said method comprising: routing a melt stream in a closed routing element through at least two magnetic fields disposed in series one after the other in a flow direction of the melt stream, said magnetic fields having a constant polarity opposite to one another, in such a way that the magnetic field lines transversely penetrate the melt stream across the entire cross section thereof and such that opposite voltages are induced in the melt stream by the magnetic fields, the voltages producing at least three eddy current fields in the melt stream that are disposed axially one after the other, and that the interaction between the magnetic fields and the eddy currents generates forces via which the flow rate of the melt stream can be slowed depending on the strengths of the magnetic fields.