Patent ID: 7564333

Claim:
Magnetic separator with permanent magnets comprising: a ferromagnetic member ( 2 ); at least two distinct magnetic poles ( 3 C), each magnetic pole located on said ferromagnetic member ( 2 ) and in circuit connection with said ferromagnetic member; wherein each distinct magnetic pole ( 3 C) comprises ferrite magnets ( 12 ) in the bottom portion in contact with said ferromagnetic member ( 2 ) for the circuit connection, and rare earth magnets ( 13 ) in the top portion to provide a distinct entrance/exit surface ( 14 , 16 ) of magnetic flux lines ( 15 ) wherein in each magnetic pole ( 3 C) the ratio between the effective magnetic length of the ferrite magnets ( 12 ) and of the rare earth magnets ( 13 ) is between 1:1 and 3:1.