Apparatus for processing aggregate material

An apparatus for processing aggregate material, the apparatus comprising:

• a chassis;
• a trough mounted on the chassis at an inclined angle;
• a pair of parallel shafts being rotatably mounted within the trough adjacent one another and extending from a lower end of the trough to an upper end of the trough, each shaft having a plurality of blades mounted thereon, the blades on the shafts being staggered such that the blades on the adjacent shafts can pass between one another during rotation of the shafts, and wherein the blades are angled so that they carry material within the trough towards an upper end of the trough when the shafts are rotated in a normal direction of rotation;
• a drive adapted to drive the shafts in opposite directions,
• a water supply for adding water to the trough;
• at least one weir is provided in a side wall of the trough adjacent a lower end thereof, over which excess water and any floating material within the trough may pass, the at least one weir defining a normal water level within the trough during operation of the apparatus;
• a first vibratory screen being mounted adjacent the lower end of the trough such that water and floating material overflowing from the weir passes onto a deck of the first vibratory screen, whereby dewatered trash passes over a downstream end of the deck of the first dewatering screen while undersize material and water passes into a sump of the first dewatering screen;
• and
• a second vibatory screen being mounted adjacent the upper end of the trough for receiving particulate material from the upper end of the trough, the second vibratory screen having at least one deck over which oversize material passes and a sump into which water and undersize material passing through the at least one deck of the second vibratory screen is collected, wherein the first and second vibratory screens are arranged so that water collected in the sump of the first vibratory screen passes into the sump of the second vibratory screen.