MAGNAROLL 2000 HIGH INTENSITY MAGNETIC SEPARATOR
with "rare earth" permanent magnets.

WHAT WILL IT DO?

Remove weakly magnetic particles from dry granular materials. Typical applications are the purification or concentration of:

Andalusite Apatite Bauxite Calcite Corundum Diamondiferous concentrates Dolomite Feldspar Fireclay Iron ores Kyanite Limestone Manganese ores Magnesite Mineral Sands Nepheline-Syenite Quartz Silica Sand Sillimanite Spodumene Tantalite Wollastonite.

Size range from 75 microns to 10mm. Special version available for larger particles.

WHAT DOES IT COMPRISE OF?

Hopper + feeder + 'cassette' (belt, magnet roll and idler pulley) + geared motor + wedge belt drive + splitters + support frame + enclosure + chutes + outlets.

Feeder:

Star-roll or Electromagnetic vibrator type.

Roll:

Diameter 100mm; Length 500, 1000 and 1500mm.

Belt:

Kevlar or PVC covered polyester fabric.

HOW DOES IT WORK?

Material is fed from the hopper at a controlled rate on the conveyor.

As the belt travels around the roll, magnetic particles are influenced by competing centrifugal and magnetic forces. They are thrown from the belt, at a position on the roll where the centrifugal force overcomes the magnetic forces.

Non-magnetic partic es are thrown from the belt on their normal trajectory.

The particles are diverted by the splitter onto the chutes or outlets.

The chutes can be arranged for 'non-magnetics' or 'magnetics' retreatment.

WHAT IS THE MAGNET MATERIAL?

Neodymium-Iron-Boron with high Coercivity (Coercivity _BH_C is equivalent to the ampere turns per metre of an electromagnet.)

Standard grade for operating temperature up to 120°C, _BH_{C ˜} 12000 Oersteds.

High temperature grade for operating temperature up to 180°C, _BH_{C ˜} 10800 Oersteds.

WHAT ARE THE PLUS FEATURES?

• Compact modular construction.

• Modules easily added or removed.

• Enclosure with dust extraction port.

• Easy access to all working parts.

• 'Cassette style' belt conveyor.

• Automatic belt tensioning and tracking.

• Quick belt change, without tools.

• Simple and easily replaceable chutes.

WHAT FACTORS INFLUENCE THE PERFORMANCE?

Magnet: Steel ratio • Belt speed • Feed rate • Splitter position.

Optimisation is possible by testing on 'bench- top' version.

The Magnaroll 2000 is supplied complete with an electrical control panel with facilities to vary the feed rate and belt speed.

WHAT IS THE MAGNETISING FIELD STRENGTH?

Depends on the Magnet : Steel ratio. Typically 10000 gauss (with very high field gradient) is measured on the steel discs using a standard 'Hall Effect' transverse probe.