Abstract: The device permits controlled batch feeding from a silo with at least one outlet opening and is particularly suitable for supplying alumina from a day's storage silo to the break in the crust on a fused salt electrolytic cell for producing aluminum. Flanged on to the silo outlet is a feed pipe running at an angle steeper than 45.degree. and joining up to the upper half of a containment pipe, likewise inclined steeper than 45.degree.. This containment pipe features at the bottom a compressed air supply line, at the top a receiving or braking chamber and connecting up to that a discharge pipe. By briefly opening the control valve at regular intervals, compressed air is forced into the containment pipe and the plug of particulate material lying there ejected into the receiving or braking chamber.