Waste concrete recycling trough

摘要

The washing-out trough (10) recycles waste concrete, being of semi-circular internal cross-section at the bottom (12). A first rotary conveyor (16) delivers from the front to the rear of the trough, in which a water inlet and outlet are respectively situated. A second rotary conveyor (30) in the rear part of the trough is coaxial to the first, there being a transverse partition (24) between them. A conveyor discharges the cleaned sand and gravel from the rear part of the trough. The partition is permeable to sand and gravel and other granular ingredients of the waste concrete, and accommodates a bearing for the first conveyor. The discharge conveyor is of the auger type, with spiral blades on a driven rotary shaft, whose bearings are outside the receiving area for material handles.