Magnetic separation.

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Presentation transcript:

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 Frantz Magnetic separator High magnetic sample collection Sample Feed Ramp angle Adjustment (typically 10°-25°) Ramp Low magnetic sample collection Vibration control

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 Sample Introduction Ramp Vibration

Magnetic separation Franz clean up Remove separated material and blow off all surfaces with compressed air.