Discrete material washing apparatus

摘要

PCT No. PCT/GB94/02491 Sec. 371 Date May 13, 1996 Sec. 102(e) Date May 13, 1996 PCT Filed Nov. 11, 1994 PCT Pub. No. WO95/13140 PCT Pub. Date May 18, 1995A discrete material washing apparatus comprises a structure mounting an elongate trough having an inlet and an outlet. A dished tray is mounted on the structure and shaped to feed into the inlet. The tray is to receive disposal of a cementitious mixture therein. A cylindrical screen has a net surface. The screen extends substantially along the length of the trough and is adapted for rotation. Water spray is provided to play on any mixture disposed onto the tray and passed through the inlet into the interior of the screen for size classification with smaller particles able to pass through the mesh of the screen surface into the trough and larger particles remaining in the screen. A first mechanism is provided to remove the smaller particles from the trough, and a second mechanism is provided to remove the larger particles from the interior of the screen through the outlet of the trough. A weir is provided in at least one longitudinal side of the trough for removal of the cementitious water therefrom. A power mechanism is provided to rotate the screen and operate the first and second removal mechanisms. A gate mechanism is provided for operation to close off the inlet of the trough, the gate mechanism is operable responsive to a pressure monitoring device surveying throughput of mixture into the screen.