Abstract: A worm centrifuge having a rotatable drum and a rotatable worm therein each independently rotatable at different speeds, adjustable weir plates at one end on the drum adjacent liquid fraction discharge openings, a ring seal including first and second rings in the region of the liquid discharge openings with one ring on the worm and the other ring on the drum, annular anti-wear protection segments on the seal ring on the auger with the segments on carriers which are removable through an end wall of the drum for replacement and for assimilating wear of material flowing through the liquid discharge openings wherein the wear on the seal ring rotating with the conveyor worm is avoided due to the anti-wear protection segments detachably joined to the seal ring.

Abstract: A method and apparatus for the separation of a slurry into a light fraction and a heavier fraction with a rotatable drum separator having a rotatable worm therein driven independently of the drum with an inlet for the slurry into the drum, an outlet for a liquid fraction, and outlet openings adjacent one end of the drum such as in the conical portion for the removal of the heavier abrasive sludge fraction with the openings extending at an angle opposite the direction of rotation of the drum and having wear-resistant inserts in the opening attached to webs beside the openings and removable by being pivoted out through the openings.