Abstract: Pumping and pulverizing apparatus for liquids containing solid materials includes a housing defined by a cylinder of revolution having an inlet opening at one end in alignment with the axis with a rotor mounted at the opposite end of the housing on a shaft which also rotates on an axis concentric with the axis of the housing; the rotor has at least two inclined surfaces which lie close to each other at their locus of attachment to the shaft and diverge in the direction of the inlet, which tends to avoid entanglement of the pumped materials with the shaft.