Dings Magnetic Group 2 PULLEY EDDY CURRENT SEPARATOR - Manual (Page 2)

The magnetic rotor is surrounded by (but not attached to) a
wear shell which supports the conveyor belt. This allows the
rotor to spin independently and at a much higher speed than
the wear shell and belt.
When a piece of nonferrous metal, such as aluminum,
passes over the separator, the magnets inside the rotor rotate
past the aluminum at high speed. This forms eddy currents
in the aluminum which in turn create a magnetic field
around the piece of aluminum. The polarity of that
magnetic field is the same as the rotating magnet, causing
the aluminum to be repelled away from the magnet.
This repulsion makes the trajectory of the aluminum
greater than that of the nonmetallics, allowing the two
material streams to be separated.
INSTALLATION
The eddy current separation system consists of the separator
and the optional discharge housing. The height at which you
place these two components depends on both the height of
the feeder before the separator and the take-away conveyors
or collection bins beneath the discharge housing.
L OCATION O F T HE S EPARATOR
Magnetic performance may be affected by magnetic
material in the field. This includes such items as I-beams,
metal supports, hoppers, or splitters. These and other ferrous
objects need to be kept out of the magnetic zone.
Place the eddy current separator at the discharge end of
a conveyor or vibratory feeder. (“Feeding the Separator” on
page 5 describes the use of a vibratory feeder to control
surges in the burden.)
Mount the separator close enough to the feeder so that
material does not fall between the two conveyors when the
feeder is initially turned on or turned off.
The belt surface of the separator should be below the
feeder conveyor, but not so low as to cause damage to the
separator belt. The greater the gap between the separator
and feeder, the harder the impact will be of sharp metal
pieces in the burden falling onto the belt. Use a 45 o slide
chute between the end of the feed conveyor and the eddy
current belt. The slide chute will present the material to the
belt without impact or bouncing.
L OCATION O F T HE D ISCHARGE H OUSING
The roof and walls of the discharge housing protect you and
your machinery from flying metal when the eddy current
separator is running. The housing also contains the
adjustable splitter and two discharge chutes.
Place the discharge housing next to the discharge end
of the eddy current separator as shown on the certified
print. The base of the legs of the separator and the bottom
of the channel frame of the discharge housing should be at
the same height. Clearance must be allowed beneath the
discharge chutes for the take-away conveyors or collection
bins.
S ETTING I N P OSITION
Bolt both components securely to footings or framework
that can support the weight of the separator and provide a
stable foundation.
Figure 2 - Major Components of the Dings Eddy Current Separator.
2