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Manual Overhead Suspension Magnets

Manual Overhead Suspension Magnets for Reliable, Efficient Tramp Removal

STEINERT’s overhead suspension magnets are used to protect your machinery, such as crushers, mills and other mining processing equipment, against wear and destruction. They protect equipment and decontaminate product by extracting tramp iron parts and the separation of ferrous material eg. bolts, rods, plates and other ferrous metal.

Electromagnets from STEINERT are characterised by their extremely strong and deep reaching magnetic fields, allowing for efficient extraction of tramp metal from fast moving, fully loaded conveyor belts.

Our manual overhead suspension magnets are particularly suitable for use with low iron volumes yet coarse parts, such as in the extraction of tramp iron parts or impurities that occur only occasionally.

As opposed to our self-cleaning overhead suspension magnets, manual overhead suspension magnets do not have a circulating belt to ensure removal of the attracted ferrous parts. A self-cleaning system should therefore be used if there is an increased iron content in the supply flow.

You are certain to find the right solution at STEINERT for a wide range of requirements and even for extreme deployment conditions. Our manual overhead suspension magnets are available as permanently magnetic versions or as electromagnets, which can be actively or passively oil cooled. A wide range of sizes with working widths from 60 cm to 300 cm also rounds off our portfolio. The combination with an inductive sensor is in principle also feasible, so that the electromagnets are only switched on when there really is a ferrous part within the supply flow. This allows the performance of the magnetic separator to be further enhanced.

We are happy to advise you on the various models and options for our manual overhead suspension magnets. Please do not hesitate to contact us!

  • Extraction operation
  • For separation of impurities in the event of low iron volumes
  • Manual removal cycle required
  • Large model variety for various requirements
  • Layer height up to 1 m

The stationary STEINERT OHSM separates out tramp iron, even under extreme ambient conditions

Stationary, oil-cooled STEINERT OHSM manual overhead suspension magnets

Electromagnetic STEINERT OHSM manual overhead suspension magnets are used to remove tramp iron efficiently and effectively in extreme deployment conditions, primarily in mining.

The manual overhead suspension magnets can thus hang longitudinally above a head pulley in the supply direction or at a fixed working distance laterally above the supply flow. The magnet withdraws ferrous parts from the supply flow and retains them during operation. Once the underside of the magnet is full, the electromagnet on a mobile crane has to be driven away to the side to the discharge point and switched off. The extracted ferrous parts will then fall into a discharge chute or collection container provided by the customer. The magnet can subsequently be driven back to its starting position and sorting operation can begin again. We at STEINERT can supply you with motorised or manual mobile cranes for optimally coordinated processes at up to 45 t load.

Electromagnets from STEINERT are characterised by their extremely strong and extensive magnetic fields. This makes them an ideal solution in the worldwide processing of ores and coal.  Here tramp iron like screws and rods must be reliably removed at very high throughputs. The pronounced depth effectiveness of our electromagnets means that tramp iron can be reliably collected even from deep layer thicknesses. These magnets have proven themselves for decades even at high belt speeds and large belt widths. Here the special design of the STEINERT OHSM, with coils made of anodised ANOFOL aluminium strip and an oil filling, provides consistent and efficient cooling – and even the risk of a burnt coil is significantly reduced. The coil design also results in a maximum number of windings with a simultaneously compact design. An external expansion vessel is not required for the cooling liquid. Passive cooling may be sufficient for smaller sizes as needed, whilst we equip large series with a heat exchanger as active cooling. This enables a performance increase of up to 15%.

The conventional rectifier has also been replaced in the high performance magnets series by the "MagDrive" controller that we developed jointly with ABB. Using ABB DC drives thus enables significant reductions in the time taken to switch the electromagnets on and off. Electric manual overhead suspension magnets from STEINERT can also optionally be operated with metal detectors, so that the magnets are only switched on when required and power can also be increased using excessive excitation. Or you rely on the "permanent retention" system: here permanent magnets are installed in addition to the electromagnets ensuring that tramp iron already excavated does not return to the sortable material, for instance in the event of a power failure. Stationary STEINERT OHSM units are available with working widths from 750 mm to 3,000 mm and working distances of up to 900 mm.

  • OHSM = overhead suspension magnet
  • Oil-cooled for extreme ambient conditions
  • Stationary for batch removal in the case of low tramp iron volumes
  • Various versions of mobile crane available
  • Optionally with permanent retention

STEINERT Boomerang – for extreme requirements in the separation of tramp iron

Ideally adapted to the material flow: the most powerful manual overhead suspension magnet with a net weight of 43 tons

We have conceived our STEINERT Boomerang manual overhead suspension magnet for separating disruptive tramp iron and coarse parts like rods and excavator teeth from ores or coal with large mass flows. Such disruptive parts can be sometimes very dense or have sharp edges and must be removed as they can cause major damage to conveyor belts, grinding machines or other procedural system components in the course of further processing.
 
The STEINERT Boomerang is therefore hung in the discharge of a conveyor belt pulley. There its characteristic shape permits it to ideally follow the material flow's discharge parabola. This optimises the sortable material's length of stay in the magnetic field and maximises the extraction of magnetic parts.

The oil-cooled electromagnet in our effective manual overhead suspension magnet generates extremely strong and extensive magnetic fields, which are designed especially for wide conveyor belts at high transport speeds. A material throughput of 8,500 t/h in coal handling can for instance be achieved on wide conveyor belts at high transport speeds and with large layer thicknesses.

The magnetic separator weighs 43 tons and has a power consumption of 64 kW. We offer you special mobile cranes to retract the magnetic separator from the material flow for the removal cycle. Here the magnet separator is swung briefly away from the separation area and switched off to allow the extracted iron to fall into a separate discharge chute. The magnet is subsequently returned to its starting position and the sorting cycle can begin again.

  • Tramp iron and separation of coarse parts in mining
  • Housing shape ideally adapted to the material flow
  • Removal cycle required
  • For wide conveyor belts with high conveyor speed and layer thicknesses at extreme throughput

STEINERT MP range – Discover the convenience of Mains Power electromagnets

The STEINERT MP range provides easy magnetic separation at low cost and without a separate controller under extreme conditions

The STEINERT MP range is unique among the overhead or manual overhead suspension magnets. This magnetic separator is equipped with electro-magnets but does not require a costly controller with large rectifier. Your advantage: it can be connected directly to the main power supply, which allows extremely fast commissioning and also saves space because no control cabinet of any kind is needed. Our STEINERT MP range is supplied both as self-cleaning overhead suspension magnets with circulating belt and also as pure extraction magnets with manual removal. The magnetic separator can thus be arranged both hanging laterally above the belt as well as longitudinally above the conveyor belt's head pulley. Removal has to be performed manually with the version from the STEINERT MP range being a manual overhead suspension magnet. In this case the magnetic separator has to hang on a mobile crane, which can be driven laterally to the drop position. The separated ferrous parts will then fall into an appropriate collection container if the electromagnet is turned off there. The magnetic separator then has to be returned to its starting position and the cleaning cycle can begin again.

The STEINERT MP range is therefore the ideal solution for simple sorting tasks. You also benefit from special ease of maintenance, reduced installation costs and high operating reliability even under extreme climatic conditions.

The built-in electromagnets consist of coils manufactured from anodised ANOFOL® aluminium strip. These coils feature passive cooling in a closed system and are thus very energy efficient.

  • MP = mains power manual overhead suspension magnet
  • Self-cleaning or with a manual removal cycle
  • No separate transformer required
  • Direct connection to a 3-phase power supply
  • With passive oil cooling

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