| 摘要 |
A magnetic separation apparatus 10 for separating magnetic materials from non-magnetic materials in a material flow comprises self-cleaning magnetic separators 15. Each separator comprises a cylinder 20 having a first end closer to a material flow than its second end in use, a piston 25 slidingly mounted within the cylinder 20, and a magnetic shaft 30 with a an outer surface, a proximal end and a distal end extending from the piston 25. The piston 25 is adapted to move the magnetic shaft 30 between an extended position 31 and a retracted position 32, such that in the extended position, at least a sleeveless portion of an outer surface of the magnetic shaft 30 is exposed to the material flow and in the retracted position the magnetic portion is retracted substantially or wholly within the cylinder 20.
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