The furnace has an oblique wall extending at an obtuse angle to the furnace hearth, and arranged below said wall is a travelling magnetic field inductor intended for moving a flow of molten metal to be directed downwards along the oblique wall for stirring the metal and upwards for the delivery of metal from the furnace. An inclined partition wall is provided over the oblique wall to run in parallel therewith above the metal discharging hole, the partition wall extending to the metal level in the furnace and short of the furnace hearth. A plate made of non-magnetic material is secured to the oblique wall on the side of location of the inductor, the fastening devices of the plate allowing its dimensions to be changed upon heating of the plate.
