Electro slag furnace removal of hydrogen and oxygen

Abstract From the Canadian patent

In the electroslag remelting of steel using at least one self-consumming electrode with an alternating current in a liquid slag which is a conductor of electric current and a water cooled mould causing the resulting liquefied metal to solidify using the principle of a growing ingot unwanted, hydrogen and oxygen are removed by employing at least two nonmelting auxiliary electrodes of different polarity connected to a source of direct current, and causing superimposed electric currents to flow between the auxiliary electrodes and the consummable electrode, between the auxiliary electrodes and the ingot sump, and between the auxiliary electrodes themselves the, superimposed electric currents …