Patent ID: 8746458

Claim:
A device configured for axial separation of materials by an eccentric inner surface of a permanent magnetic drum, the device comprising: a permanent magnetic drum assembly comprising the permanent magnetic drum, a bracket, wherein the permanent magnetic drum assembly is mounted on the bracket, and an eccentric drum assembly mounted in the permanent magnetic drum, wherein the eccentric drum assembly comprises an eccentric drum, an eccentric drum support, an eccentric drum rotation regulating mechanism, a cleaning roller, a high magnetic material groove and a field strength gradient regulating mechanism; wherein two ends of the eccentric drum are connected with the eccentric drum support that is mounted on the bracket; the cleaning roller, the high magnetic material groove and the field strength gradient regulating mechanism are mounted inside the eccentric drum; a mutual support member of the cleaning roller, the high magnetic material groove and the field strength gradient regulating mechanism is connected with the bracket, and a support member of the field strength gradient regulating mechanism is regulable; a selected material inlet silo is connected with the bracket, the eccentric drum rotation regulating mechanism is mounted on the bracket, a toothed wheel in the eccentric drum rotation regulating mechanism is engaged with a toothed ring on the eccentric drum, or a friction wheel in the eccentric drum rotation regulating mechanism is in friction combination with the outer surface of the eccentric drum, wherein the field strength gradient regulating mechanism comprises an arched drum containing a magnetic conductive material, wherein the thickness of the magnetic conductive material is larger than 0.5 mm and smaller than the diameter of the eccentric drum, and wherein the device is configured for regulating the field strength and the gradient of a magnetic field being applied to materials that are being separated in the device by adjusting the distance between the field strength gradient regulating mechanism and the eccentric drum.