Material Handling Magnets

Magwell Magnets have increased their range of Suspension Magnets over the years to cater for the ever-increasing size of conveyors, deeper troughing and conveyor speeds. Magnets can offer customers two types of suspension magnet, depending on specific applicational details. The units are available as either electro or permanent magnets.

Suspension magnets are specifically designed for the extraction of occasional tramp iron from a product stream being conveyed by a conveyor belt or vibratory feeder. The magnet is suspended above a conveyor with sling chains setting the magnet face at the correct angle for optimum extraction. An electro suspension magnet can be repositioned away from the conveyor and de-energised for cleaning. A Permanent Suspension Magnet can be suspended from a travelling trolley so that it can be moved away from the conveyor to be manually cleaned.

Permanent Suspension Magnet units are designed to remove general tramp ferrous metals from a range of conveyed materials. For applications that may require the extraction of small ferrous contaminants such as nails and screws, the Mastermag range of permanent suspension magnets can incorporate a tri-polar magnet design with core, poles and a backbar in high permeability mild steel.

The tri-polar design ensures that magnetic flux leakage is reduced and the magnetic field is focused directly onto the centre of the conveyor belt to improve the extraction. 

Mechanical construction of MAGWELL has high capacity lifting magnets are very sturdy to meet toughest demands in service. The one piece of magnet body is cast from high-grade dynamo steel. Underneath, between centre and outer poles, the magnet body is closed by sturdy, cast and rib-reinforced non-magnetic austenitic manganese steel plate. Fastening at the centre pole is effected by means of a shrunk-on ring, and at the outer pole by locking ring.

The standard three-fall chain suspension, designed with common suspension ring is rated to meet all normal duty load. Special change are available on request for extremely heavy loads. Two lugs for guide ropes are fitted as standard.

The Bumping plate: A strong plate made from hard, wear resistant, manganese steel protects the coil but does not interfere with the magnetic field.

The coil: This is made from Anodized strip or aluminum / copper conductor. The anodized aluminum strip requires no insulation between turns and has a much better fill factor than copper coils, which increases the load possibilities. The coil is also extremely temperature-resistant.

The design: The magnetic pole, the steel cross-section and the flow through the coil have all been precisely tailored to each other to provide optimum transport power and weight conditions.

The power supply: We deliver the appropriate power supply to every one of our magnets.

CABLE TERMINAL BOX

The cable terminal box is of robust construction to meet toughest practical service and it consists of the following parts:

• Cast compartment (back) for exciter coil connection
• Line connections from back to front compartment
• Cable collar to limit load on cable
• Terminal board for connecting the cable
• Gland bolt for sealing the cable
• Front compartment for connecting the cable
• Back and front compartment covers are fitted with watertight gaskets, secured with socket head screws
• Solid and fracture-proof protective cover made of cast steel incl. set screw. This cable terminal box is constructed for durability

ELECTRICAL ACCESSORIES

The following electrical accessories are required with the lifting magnet and are available.

• Transformer rectifier set or DC generator
• Contactor Panel
• Cable reeling drum
• Remote switch
• Master controller

Application:

• Loading/unloading of steel scraps/pig irons/cast iron/boring/turning/broken steel
• Handles slabs, blooms and ingots
• Handle plates/angle/channels
• Used in smelt mixing operation
• Can be used with mobile cranes
• Direct feeding in the furnace
• Sweeping/cleaning of mill area

MAGWELL Consists Permanent Magnetic and Electro magnet are designed to remove both large and small size or types of tramp metal from product streams conveyed by belt. The tramp metal that is captured by the magnet can retain before cleaning is required. Usually the removal of the tramp metal can be obtained for a low cast than an electromagnet also working

WORKING OPERATION

Magwell Suspension magnet Consists of a large Size of magnet mounted iside a support frame suspended over the conveyed product stream. The receiveing belt magnet should be suspended approximately five to ten inches above the product stream for optimum tramp metal removal. The magnet should be located in an area that has easy access to allow for proper maintenance. Also the magnet should operate in an area of the belt where no integral parts of the conveyor can become magnetized, Such as idler rollers or belting support plates, as this may cause excessive wear on the conveyor system. To clean the magnet simply turn the collection pan winch to draw the pan across the magnet face. The pan retains the tramp metal as it is removed from the magnet. Once the pan is drawn entirely across the magnet face, it can be removed 

PRINCIPLES OF OPERATION

Magnets always have two poles: one called north; the other called south. Two north poles always repel each other, as do two south poles. However, north and south poles always attract each other. A magnetic field is defined as a physical field established between to poles. Its intensity and direction determine the forces of attraction or repulsion existing between the two magnets. Figures 1.1 and 1.2 are typical representations of two interacting magnetic poles, and the magnetic field established between them. Magnets are found in nature in all sorts of shapes and chemical constitution. Magnets used in industry are artificially made. Magnets that sustain their magnetism for long periods of time are denominated “permanent magnets.” These are widely used in several types of magnet