| 摘要 |
A multi-deck screening assembly comprising a plurality of vertically stacked downwardly sloping screen decks (6,8,10), each screen deck having a plurality of grading apertures formed therethrough whereby under-sized material may pass through said apertures while over-sized material passes over a lower discharge end of each screen deck, said plurality of screen decks being mounted on a common frame (12), said frame (12) being mounted on a chassis (2) via resilient mounts (14) and being provided with vibration generating means (16) for imparting vibration to the screen decks, said plurality of screen decks comprising an upper deck (6), an intermediate deck (8) mounted below the upper deck for receiving under-sized material from the upper deck, and a lower deck (10) mounted below the intermediate deck for receiving under-sized material from the intermediate screen deck, a first stockpile conveyor (18) being mounted on the chassis (2) arranged to receive over-sized material from the discharge end of the lower deck (10), a second stockpile conveyor (20) being mounted on the chassis (2) to receive over-sized material from the discharge end of the intermediate deck (8), and a third stockpile conveyor (22) being arranged to receive over-sized material from the discharge end of the upper deck (6), wherein a transfer conveyor (28) is provided adjacent the discharge end of the upper deck (6), said transfer conveyor (28) being arranged to deliver over-sized material from the discharge end of the upper deck (6) onto the third stockpile conveyor (22). |
