Patent ID: 8474629
Filing Date: 2013-07-02
Classification: B03C

Abstract:
1. A tramp metal separation device for removing contaminants from a stream of raw materials that is being conveyed by a pneumatic conveying line having an upstream portion and a downstream portion, the tramp metal separation device comprising: a first housing having an inlet, an outlet, and an opening, wherein the inlet is connectable to the upstream portion of the pneumatic conveying line and the outlet is connectable to the downstream portion of the pneumatic conveying line; a drawer having a magnet assembly and a wiper assembly, the magnet assembly including a face plate and a plurality of elongate magnet members, the wiper assembly including a wiper plate having a plurality of bores that each have a respective one of the elongate magnet members extending therethrough, where the drawer is supported with respect to the first housing such that the drawer is moveable between an extended position, wherein the elongate magnet members are each positioned within the first housing and are adapted to be in contact with the stream of raw materials, the face plate is positioned adjacent to the opening, and the wiper plate is positioned adjacent to the face plate, and a retracted position, wherein the face plate is spaced from the opening, the wiper plate is spaced from the face plate, and the elongate magnet members are each positioned outside of the first housing and further wherein the wiper plate of the wiper assembly has a range of motion that is shorter than the range of motion of the magnet assembly, such that the face plate of the magnet assembly slides away from the wiper plate of the wiper assembly and the elongate magnet members slide through the bores of the wiper plate while the drawer moves from the extended position to the retracted position to remove contaminants from the elongate magnet members; and at least one actuator operatively connected to the magnet assembly of the drawer for moving the drawer between its extended position and its retracted position.