Portable blast furnace slag beneficiating plant

In a portable slag beneficiating plant for processing steel mill slag and separating metallic pieces therefrom and classifying the metallic pieces as to particle size, a frame, a feed hopper on said frame, support springs on said frame, an inclined grizzly on said support springs and positioned beneath said feed hopper, an eccentric device attached to said inclined grizzly for oscillating the same, a magnetic separating roll and a conveyor belt extending from beneath said inclined grizzly to and trained over said magnetic separating roll and arranged to drive the same, second support springs on said frame, a second grizzly on said second support spring and positioned beneath said magnetic separating roll, a second eccentric device attached to said second grizzly for oscillating the same, said second grizzly arranged to receive metallic pieces from said magnetic separating roll and a second belt conveyor extending from beneath a portion of said second grizzly to a point adjacent one end of said frame, a source of fluid pressure, a hydraulic motor connected to said first mentioned eccentric device for actuating the same, a second hydraulic motor connected to said eccentric device for actuating the same, a third hydraulic motor connected to said magnetic separating roll for driving the same and the first mentioned conveyor belt and a fourth hydraulic motor connected to said second conveyor for moving the same, hydraulic piping interconnecting said source of fluid pressure and said hydraulic motors individually and throttle valves controlling said piping whereby said hydraulic motors may be individually controlled by the individual manipulation of said throttle valves.