Apparatus for inducing flow in a molten material comprises a refractory lined vessel (10) for containing a molten material with an aperture (35, FIG. 3) in the refractory lining. A mounting plate (40, FIG. 4) of non-magnetic material is removably mounted to the vessel over the aperture and an electromagnetic induction unit (14) is mounted adjacent an exterior face of the mounting plate. A cooling system is provided for cooling the mounting plate. The mounting plate may have vanes (72, FIG. 6) on an outer surface to define cooling channels (74, FIG. 6) through which a cooling fluid can flow. The vanes may follow a non-linear path and the cooling fluid may be air.