Date post: | 17-Jan-2016 |
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Magnetic separation
Magnetic separation
Overview• Material is separated based on magnetic
susceptibility• Highly magnetic material is removed using a
hand magnet• Weakly magnetic materials are separated by a
Frantz magnetic separator
Magnetic separation
Hand Magnet• Spread the sample in a single
layer on a piece of paper• Cover the hand magnet in
weighing paper and pass over the sample
• Set the magnet of a second piece of weighing paper, hold the first down and remove the magnet
• Do not allow sample to contact the magnet directly as it is very difficult to remove.
Magnetic separation
Frantz set up• The Frantz produces a strong magnetic field over a ramp
that holds magnetically susceptible material, while non magnetic material falls to a second ramp
• Set the angle of the ramp using the black rotating handle, typical angles are 10° - 25°
• Adjust the strength of the magnetic field using the current knob *do not exceed 1.3 A*
• Set the sample constrainers in place at the end of the ramps
Magnet current
Current Adjustment
Magnetic Separation
Ramp angleAdjustment
(typically 10°-25°)
Sample Feed
Ramp
Low magneticsample collection
High magneticsample collection
Vibration control
Frantz Magnetic separator
Magnetic separation
Frantz sample separation• Add sample to the feed shoe. • The rate of sample introduction is controlled by the
angle of the feed outlet shoot and the strength of feed vibration
• The speed at which material moved down the ramp is controlled by the strength of the chute vibration
• Set the vibrations such that material is able to separate on the ramp and is not introduced so fast as to cause clogs.
Magnetic Separation
SampleIntroductionRamp
Vibration
Magnetic separation
Franz clean up• Remove separated material and blow off all
surfaces with compressed air.