Patent ID: 11858004
Assignee: METSO OUTOTEC FINLAND OY
Field: Chemical engineering (Chemistry)
Classification: CPC B | IPC B

Claim 9:
10. A method in a mobile multi-deck screening apparatus, comprising:
receiving material for screening with a feeder of the apparatus;
receiving and screening material from the feed by a first screen deck;
outputting by a first discharge conveyor an oversize fraction of the first screen deck;
receiving by a second screen deck an undersize fraction of the first screen deck;
outputting by a second discharge conveyor an oversize fraction of the second screen deck;
pivoting the first discharge conveyor to operate in a direction selected between a first direction and a second direction, which second direction differs from the first direction;
pivoting the second discharge conveyor to operate in a direction selected between a first direction and a second direction;
pivoting at least one of the first and second discharge conveyors to operate further in a direction selected between the first direction and a third direction, the first direction being between the second and third directions and the second and third directions pointing to opposite sides of the mobile multi-deck screening apparatus; and
selectively discharging in a common pile oversize fraction material of the first screen deck and oversize fraction material of the second screen deck;
wherein the first direction is forward;
the method further comprising pivoting one or both of the first and second discharge conveyors from one side of the mobile multi-deck screening apparatus to an opposite second side; wherein in that the method further comprises
discharging material to the same pile by the first and second discharge conveyors, when the first discharge conveyor and the second discharge conveyor are in a same direction; and
supporting the first discharge conveyor and the second discharge conveyor so that when the first discharge conveyor and the second discharge conveyor are in a same direction, the first discharge conveyor and the second discharge conveyor are stacked and the feeding ends of the first discharge conveyor and the second discharge conveyor are concentric.