Low Intensity

Magnetic Separation

LIMS

Andrew Wilkinson

Metso TR Seminar

27 April 2012

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Range of Metso LIMS Models

Dry Cobbers with belt, models BSS1200 and BSA1200,

for coarse material, up to 300 mm

Dry drum with dust housing, model DS900 and DS1200

for processing, 0-20 mm material

Wet Cobbers, WS1200CC and WS1200CR series

Wet finishers, WS1200CTC series

Froth separator, WS1200DWHG series

Dense Media Recovery WS1200DM and WS1200 CR

series

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LIMS basic data

Drum diameters 916 (dry drum only) and 1200 mm

Drum lengths from 600 to 3600 mm

Magnetic ratings

- High capacity 120 mT at 50 mm

- High gradient 120 mT at 15 mm

Capacity 5 up to 150 t/h per meter drum length

depending on application and ore characteristics

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LIMS Principles of magnetic separators

Stationary magnetic system and revolving outer

drum

Magnets provide alternating polarization

Revolving on drum surface improves cleaning of

collected material

Drum transports magnetics to discharge weir

Non-magnetics is discharged through discharge

spigots, ports or slots

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LIMS Principles of magnetic separators

Magnetic drum made in non-magnetic material

Tank made in non-magnetic stainless steel with

rubber lining in wear zones

Drive system with high efficiency, high availability,

(gearbox-motor) direct drive

Easily adjustable machine parameters such as

gaps, pulp level and magnet setting)

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Principle of Magnetic Separator

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Magnetic Separator

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Magnetic Separator, wet

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Magnetic Separation Dry LIMS type drum

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Magnetic Separator, dry

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Magnetic separator Yoke - assembly

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LIMS

WS1200

series

Drive arrangement

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LIMS

WS1200 series

Adjustable concentrate

overflow weir

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LIMS

WS1200

series

Magnet angle adjustment

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LIMS

WS1200 series

WS1230DM in special

steel against corrosion

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LIMS

View of Cleaner

Separation Stage at LKAB,

Kiruna.

A total of 164 off WS1200

series are installed in LKAB

concentrators