Continuous magnetic separation even under extreme environmental conditions with the STEINERT OHSM

This overhead suspension magnet with oil cooling meets the highest demands on a continuous sorter.

Electromagnetic STEINERT OHSM overhead suspension magnets are used to remove tramp iron efficiently and effectively in extreme deployment conditions, primarily in mining. These manual overhead suspension magnets are either attached longitudinally above a head pulley in the supply direction or laterally at a fixed working distance above the supply flow. The magnetic separator is equipped with a circulating belt that ensures continuous removal of the extracted ferrous parts. Uninterrupted sorting is possible when equipped with this self-cleaning functionality.

The worldwide processing of ores and coal requires the effective removal of tramp iron like screws or bars at very high throughputs. Electromagnets from STEINERT are characterised by their extremely strong and extensive magnetic fields. 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. The special design of the STEINERT OHSM using coils made of anodised ANOFOL® aluminium strip and an oil filling provides consistent and efficient cooling, thus reducing the risk of a burnt coil. Our special 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 your large series with an active cooling system. This active cooling using heat exchangers enables a performance increase of up to 15%.

The conventional rectifier has been replaced in the high performance magnets series by the "MagDrive" controller that we developed jointly with ABB. Using ABB DC drives enables significant reductions in the time taken to switch the electromagnets on and off.

The electric overhead suspension magnets can optionally also be operated with metal detectors, so that the magnet is only switched on when required and the power is further increased using excessive excitation. The self-cleaning STEINERT OHSM units are available with working widths from 750 mm to 3,000 mm and working distances of up to 900 mm.

Your benefits:

  • OHSM = overhead suspension magnet
  • Self-cleaning for continuous sorting operation
  • Active or passive oil cooling for extreme ambient conditions
  • Working widths up to 3,000 mm

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Application areas

Ore sorting

Sort waste rock and ore with low concentrations from the process at an early stage, in order to save energy and resources and to unlock more enriched ore more effectively.

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Stockpile treatment with ore sorting

STEINERT sorting systems let you process low-grade stockpiles effectively.

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Industrial mineral sorting

STEINERT sensor sorters are fitted with colour cameras and lasers or near-infrared (NIR) systems with hyperspectral imaging (HSI) to identify surfaces with amazing accuracy.

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Coal sorting

Dry coal beneficiation with sorting systems (de-stoning for greater efficiency); wet drum magnetic separators for traditional processing.

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Tramp removal sorting

Overhead suspension magnets reliably remove tramp iron from bulk materials. They thus protect crushers, grinders and other processing plant from wear and damage.

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