Permanent magnetic drum separators are essential in nearly processing industry and the widely used for the separation of iron contamination from minerals, chemicals, food, flour, sugar, grains, plastics, sand, cement, fertilizers, rock, borings and many other gravity or conveyor transported products.

ELEKTROMAG permanent magnetic drum consists of a stationary permanent magnetic assembly around which the drum shell revolves. The permanent magnet assembly has an uniform and everlasting magnetic field across the entire drum width. The magnetic field is effective over approximately half the drum circumference and should be brought into position before starting. As material, fed evenly, reaches the drum, the powerful permanent non-electric magnetic field attracts and holds ferrous particles to the revolving shell. As the revolving shell carries the material through the stationary magnetic field, the non-magnetic material falls freely from the shell while ferrous particles are firmly held until carried beyond a divider and out of the magnetic field.

The permanent magnet used is an everlasting magnet whose strength does not diminish with time during normal use and can be used throughout the life of the installation.

The permanent drum separators are available in standard drum diameters of 300 mm, 400 mm, 500 mm, 650 mm, 800 mm and 1000 mm.

Drum widths range from 300 mm to 2000 mm. Other sizes can be made as special to your requirement. The larger the diameter and width the greater is the volume of material which can be handled.

ELEKTROMAG offers the option of two different magnetic material having different magnetic intensity :

This LOW INTENSITY DRUM uses ceramic magnets. This is useful for most of the applications where the iron is in free form or where iron particles are large. The average magnetic field strength on the magnetic drum surface would be in the region of 1500 - 2500 Gauss depending on the drum size.

This MEDIUM INTENSITY DRUM uses a special grade of Neodymium - Iron - Boron (NdFeB) magnets. This is useful for removing weakly magnetic contamination as well as fine iron particles. The average field strength on the drum surface would be in the region of 4000 - 5000 Gauss. The rare earth magnetic drum is obviously far more expensive than the ceramic magnetic drum, but, it offers unmatched performance in certain difficult applications.

ELEKTROMAG offers permanent magnetic drum machines in various styles to suit customer convenience :

The drum is supplied without the housing drive or any other accessories. This drum is however supplied mounted on pedestals and a V-groove pulley is furnished for driving the drum shell by link-belt or V-belt.The drum is suitable for installation at the discharge end of chutes, spouts, screw conveyors, elevators and other form of carrying medium.

The drum machine is self contained and consists of a feed hopper with adjustable feed gate, jig shaker feed tray, the drum itself, motorized drive for the drum and discharge chutes for magnetic and non-magnetic material. All components are mounted on a sturdy, suitably designed frame work of heavy section angle iron.

The Double Drum Machine is used for handling large capacities or difficult materials requiring more than one magnetic treatment. Double Drum Machines with individual jig shaker tray, can also be supplied. Triple Drum Machines can also be supplied if required.

The equipment comes complete with a chute type feed hopper, adjustable feed regulation gate, magnetic drum and geared motor drive in a ready for use condition. Inlet and outlet openings are flanged for ease of connection to customers duct work. Double or triple totally enclosed machines can also be supplied if required by clients.

• No transformer rectifier required.
• No coils to burn-out.
• No electric wiring required for drum.
• No power consumption.
• No operating cost.
• No maintenance.
• No failure - hence no downtime.
• Uniformly powerful.
• Everlasting magnetic power guaranteed.

1. AN ELECTROMAGNETIC VIBRATING FEEDER can be supplied instead of the standard jig shaker tray for a smooth, steplessly controlled, constant feed to the drum. This helps achieve maximum efficiency in magnetic separation.
2. PERMANENT MAGNETIC CHUTE : When a high degree of separation is required we recommend the fitting of an elektromag plate magnet on the face of the standard non-magnetic front diverting chute. An additional separation can thus be effected in one pass. The permanent magnetic chute is illustrated in the picture of the double drum machine (page 3. ) For more technical information regarding our plate magnets, please ask for our catalog ED 509.
3. PORTABLE DRUM MACHINES : The drum machine can be mounted on 4 wheels, at extra cost, to make it portable.
4. ELECTROMAGNETIC DRUM with either aluminium or copper coils can also be supplied instead of Permanent Magnetic Drum if required by the customer. The electromagnetic drum will be supplied with suitable rectifier and other necessary switching and protective equipment. Electromagnetic drums can be supplied in standard drum diameters upto 1800 mm and widths upto 2000 mm.

Proper selection of the correct size and type of an ELEKTROMAG magnetic drum is dependent on a number of factors.

The following points are of special importance.

Type of material :

• Whether wet, dry or hot.
• Whether free flowing, dusty or cohesive.
• Density of material (t/m3).
• Neutral or chemically reactive.

Average and maximum lump size of material.

Through-put in cubic meters/hour or tonnes per hour. Is material supply continuous or in batches?

Purpose of iron separation:

1. Protection of machinery before or after crushing ?
2. Removal of occasional impurities.
3. Recovery of iron from fresh or dumped slag of high iron content.
4. Recovery of iron from cold or hot moulding sand or old foundry sand.
5. Purification of material (food, fodder) from obnoxious or dangerous ferrous particles.

Type of iron-large parts such as nails, bolts, tools or fine iron fillings etc. ? - (give maximum dimensions)

Proper reply to the above questions will help us to make a correct selection. In certain unusual applications customers may be requested to furnish a small quantity of material to be tested before a recommendation can be made.