Our Products : Magnets & Separators : Overband Magnets

Product Description

Self Cleaning Overband Magnets

The Mastermag overband separators are renowned around the world as the most effective units for the continuous removal of tramp ferrous material from a product stream. This type of magnetic separator is used to protect, clean and separate materials on applications in the recycling and quarrying industries. Most commonly used on mobile crushing machinery, overbelt magnets are self-cleaning, so that no manual cleaning is required and downtime for the end user is reduced to a minimum. Master Magnets offer 2 types of magnetic overband separator to work with different types of applications. Please click on the models tab for more information.



Permanent Overband Magnets

For applications that require a magnet to operate up to 400mm above a conveyor, the Mastermag permanent overband separators are a cost effective solution that can be applied to a wide range of industries. Master Magnets designed their range of overband separators for use in recycling and quarrying applications and was the first magnet that was designed specifically for use on mobile crushers. The Master Magnets overband is designed to be a lightweight separator with low running costs as it requires no power source for the magnet to operate. The magnet is also self-cleaning, reducing downtime to a minimum. Overbands can be positioned either inline over a conveyor head pulley or across a conveyor belt. All models are designed to be virtually maintenance free and are available with either an electric or hydraulic drive. Master Magnets supply Overband Magnets to operate over 150mm - 2000mm conveyor belts. For large conveyor belt widths, Overband Magnets can be custom designed to suit the application. Additional support structures can also be supplied.

Tri-Polar Overband Magnets

If the operating gap is higher than 250 mm, the Master Magnets overbands will feature a Tri polar design. The Tri-polar design utilises an advanced magnet system to effectively give three poles across the bottom face of the magnet, therefore intensifying the field in the centre of the magnet block (see below).
The Advantages of Tri-Polar Magnets;
Reduces magnetic leakage
Reduces belt damage
Produces a cleaner frame
Improves ferrous metal extraction

Electro Overband Magnets

The Heavy-Duty electro overband is the most powerful overband separator from the Mastermag range. Master Magnets manufacture the widest range of this type of separator, with the largest weighing 35 tonnes and spanning across a 2 metre wide conveyor. Due to its high magnetic strength, the overband is able to work at an increased operating gap, enabling it to extract ferrous from deep troughed conveyors.
Electro magnetic overbands are commonly used for installation in plants within the quarrying and recycling industries where they would be positioned either inline over the head pulley or across a conveyor belt.
Master Magnets supply Heavy-Duty overband magnets to operate over 150mm - 2000mm conveyor belts. For larger conveyor belt widths, overband magnets can be custom designed to suit the application. Additional support structures can also be supplied.
There are two different types of heavy-duty electro overbands;
Oil cooled - This type of heavy-duty overband is the most commonly used of the two types. It efficiently maintains an optimum working temperature and is also capable of producing a higher magnetic force than the equivalent air cooled electro overband magnet. Air cooled - This type of magnet is used where oil is not a customers preference for health and safety reasons. For example, a client may wish to use this type of cooling because it is less of a fire hazard.
To give the overband magnet a longer belt life (especially when handling abrasive materials) an armoured belt can be fitted as an optional extra. Heat resistant belting can also be supplied to allow the heavy-duty overband to operate at higher ambient temperatures.


Overband Magnets

Typical applications for the Mastermag range of Overbands are;
Installation on Mobile Crushers, Screens and Shredders
Installation within a MRF (Material Recovery Facility) plant
Separation of ferrous contamination in quarries
Removal of ferrous materials in mining operations
Used in Wood Waste processing applications
Separation of ferrous in fragmentiser metal recovery
Separation of ferrous metals from Municipal Solid Waste
Removal of ferrous contamination in glass cullet recycling
Separation of ferrous from Kerbside collection recycling
Separation of ferrous metals in Skip Waste recycling
Removal of ferrous from Foundry applications