Technology

Principle

A non-ferrous metal separator basically consists of a short conveyor driven from the feed end. A rapidly rotating system of permanent magnets – the pole system – which generates high-frequency changing magnetic fields, is incorporated in the head drum. These fields create strong eddy currents in the non-ferrous metal parts, in which their own magnetic fields, opposing the external fields, now build up. The NF-metal parts jump out of the remaining material flow. STEINERT’s patented eccentric pole system guarantees the maximum efficiency in this process, delivering top-quality separation and long-term operation!

The STEINERT innovation:

The patented, eccentric magnetic pole system! Thanks to the magnetic pole system mounted eccentrically in the head drum of the STEINERT non-ferrous separator, the effect of the changing magnetic fields is concentrated exactly on an area within which the material is most effectively subject to the forces. The pole system can be adjusted so that this position can be changed in order to have the maximum effect on the discharge parabola, and further amplify 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, causing the non-ferrous metals to prematurely eject from the magnetic field, resulting in inadequate deflection and poor recovery. The eccentric pole system, in contrast, ensures that the magnetic field is maximumized only 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 shell 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.

Design:

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 patented eccentric design.