24-25 Jul 2024

STEINERT – Eddy current technology at its best

Jun 2, 2020

The mechanical recovery of metals is the economic basis of all recycling – something recognised by Ferdinand Steinert in 1889 when STEINERT Magnets were first used to recover iron from steel slag.

Since then STEINERT magnets became famous throughout Europe as a symbol of quality & reliability, working in some of the toughest environments. As technologies developed, STEINERT began producing eddy current separators, questioning the common centric system and revolutionising non-ferrous metals separation capability with their patented eccentric system that became the standard in eddy current separation systems. Being a pioneer since its beginnings, STEINERT continues to lead innovation in eddy current separation technology.

The STEINERT Eddy C range, with the Eccentric Pole System fulfills the non-ferrous metals separation requirements perfectly! High yield and long life are the qualities that make for assured, long-term operational results. The non-ferrous metal separator can be used wherever non-ferrous metals have to be recovered or separated, e.g. where shredder material, municipal waste, WTE bottom ash, electronic scrap, wood chips, glass, batteries or foundry sand are processed.

The magnetic pole system is mounted eccentrically in the head drum of STEINERT non-ferrous separators, where the effect of the changing magnetic fields is concentrated exactly on the target area within which the material is most effectively subject to the forces. The pole system is adjustable in most cases, allowing position changes in order to have the maximum effect on the discharge parabola, further amplifying the effect of the forces.

In the concentric pole systems offered by our competitors, the effect of the magnetic field is frequently felt too early, the consequence being that the non-ferrous metals are prematurely ejected from the magnetic field, thus resulting in their not being adequately deflected. The eccentric pole system, in contrast, ensures that the influence of the magnetic field is only at a maximum at the moment of separation, and that no magnetic field is generated at other positions on the belt drum. Residual ferrous metals cannot adhere to the head drum, which means that wear on the belt and the self-cleaning drum shell are reduced to an absolute minimum – another important difference from the concentric system.

STEINERT achieves its extraordinary separation results thanks to the use of neodymium-iron-boron magnets, a thin conveyor belt and an electrically non-conductive drum body made from fibre-reinforced composite materials. Together, these features ensure maximum field strength and exact, efficient separation. The eccentric pole system is also protected by a sealed cover of stainless steel.

Normally, the bulk density increases with decreasing particle sizes. This increases the importance of the mass throughput. For coarse and light materials, the working width is determined by the volume-related throughput. Deep, medium-frequency fields are required for these types of material. Fine grained material requires less extensive, but higher frequency fields. All these are available in STEINERT’s eccentric design.

STEINERT’s extensive range of non-ferrous metal separators are based on three series of units with special magnetic pole systems and working widths ranging from 500 to 2500 mm (16“- 80“). The STEINERT non-ferrous metal separator also demonstrates especially high capabilities in the processing of electronic scrap, cables, printed-circuit boards and foundry sands. Even finely divided non-ferrous metals with grain sizes down to 1 mm can be separated thanks to the eccentric system.

Applications for STEINERT Eddy Current technology include:

  • Bottom Ash metals recovery
  • MSW & Commingled Recycling
  • Scrap Metals processing
  • Pre-Sorting for Refuse Derived Fuel
  • Scrap Timber cleaning
  • E-Waste recycling

STEINERT Australia are one of the leading magnet manufacturers and suppliers of sensor sorting technologies in the Asian-Pacific region, supplying both the waste & recycling and mining industries.

For further information visit their website or contact them here.

Meet the STEINERT team at AWRE this November.

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