MAGNETIC EQUIPMENTS FOR FERROUS ELEMENTS SEPARATION
STATIC (ELECTRO)MAGNETIC SEPARATOR EP - SMP
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The protection electromagnets EP and the permanent
magnet plates (SMP) are static equipment for iron
separation: their purpose is to extract iron particles
from a flow of inert material holding it tightly till the
operator carries out its detachment.
The permanent magnet plate SMP are made of a
circuit in soft iron with low carbon tenor and a group
of permanent magnets in Sr-ferrite. The lower plate
face is made of 12% manganese antimagnetic and
wear resistant steel.
The magnetic field geometry in plates SMP has
normally 3 poles with a central core and two side
ones. For a highest extraction yield, the inert material
flow should be perpendicular to the 3 poles line.
Respect to the conveyor:
• dimension L must be crosswise
• dimension A must be lengthwise
• dimension S joint to dimension A gives the
extracting force at distance H
In particular cases, plates SMP can be made of
neodymium (Nd-Fe-B) permanent magnets.
Electromagnetic plates EP have same purpose and
installation features as permanent magnet plates.
The difference lies there, that in EPs the magnetic field is generated by an internal electric coil. The electric
power turns into magneto motive force which generates the magnetic flux.
The magnetic circuit is made of high permeability soft iron and the coil - fed by continuous current - of
copper or aluminium with grade C insulation. An electric board is also supplied for magnet control. The
lower electromagnet face is made of 12% Mn antimagnetic steel.
OPERATION
Iron is attracted and hold by the active face.
In plates SMP, ferrous pieces must be detached manually from face A, while it is more difficult from face L.
In electromanetic plates EP, ferrous pieces have to be detached by switching voltage off from the electric
board.
LAST UPDATE: 22/10/2003
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