Abstract: Disintegrator and separator apparatus and method, having a pulverizing chamber with a rotary impeller therein for imparting acceleration to raw material received through an inlet. The impeller includes a pair of spaced apart discs having a plurality of blades connected between the discs at their outer edge, with a drive shaft connected to only one of the discs, leaving the middle of the pulverizing compartment open. A peripheral impact surface in the pulverizing chamber has a portion of its inside wall facing radially inwardly and aligned in the direction of rotation of the blades. One embodiment includes a plurality of overlapping peripheral impact blades which include an outlet passage between each pair of adjacent plates; a second embodiment includes a peripheral impact ring having outlet slots therethrough; and a third embodiment includes a peripheral impact ring having a concave inner surface, with outlet passages adjacent both sides thereof around the circumference of the ring.