Abstract: Feed reservoir intended for retaining a molten metal and in particular a steel, which reservoir comprises a refractory bottom, refractory walls, at least one nozzle placed in the refractory bottom in order to feed at least one mold with molten metal, a refractory buffer having a buffer bottom and an approximately vertical partition defining a cavity, the buffer being arranged on the bottom of the reservoir in order, on the one hand, to receive a jet of molten metal coming from a ladle which is moved above said reservoir and, on the other hand, to ensure that said reservoir is separated into two spaces, a first space having at least one nozzle and a second space, the cavity of the buffer, confining the molten metal, which metal then flows out into the first space by spilling over the top of the partition, wherein the buffer, the partition of which defines the second space, is divided into two zones by a barrier, a zone receiving the jet of metal and a zone in which the metal rises, the latter zone being locate