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.