Abstract: An apparatus for distributing particulate material includes a feeder having a charging inlet and a discharge outlet duct having converging walls. Coaxially aligned with the discharge outlet duct is a deflector including a first spreader having diverging outer walls, and a second spreader contiguous with the diverging walls of the first spreader and having diverging walls of an angular inclination to the direction of flow of the particulate material greater than that of the first spreader. The charging inlet may have attached thereto an extension and an expansion chamber into which a feed pipe projects, the expansion chamber and the feed pipe being external to a receiving vessel. The particulate material may be fed into the feeder entrained in air. The material leaving the second spreader is uniformly distributed and may form a hollow curtain of uniformly distributed particulate material. The curtain may fall into a spray mixing vessel, and a circular baffle may contain the curtain.