All metals which in their composition do not contain iron or alloys deriving from iron are classified as NON-Ferrous Metals.

Depending on the density, they can be classified into:

  • Ultralight Metals: density less than 2,000 Kg / m3 → Magnesium;
  • Light Metals: density greater than 2,000, but less than 5,000 Kg / m3 → Aluminum, Titanium;
  • Heavy Metals: density greater than 5,000 Kg / m3 → Copper, Lead, Nickel, Tin, Chromium, Zinc.

The non-infinite mineral reserves, the high cost of extraction and processing, the economic value that the metal (Fe / Non-Fe) retains despite being classified as waste, have encouraged separate collection and recovery for reuse.

One of the most efficient and widespread methods for the recovery and separation of NON-ferrous metals is separation by physical principle, that is, by means of induced currents (or eddy currents).

The non-ferrous metal intrusion, which has reached the area of ​​influence of the magnetic field (rotated at high speed / frequency), undergoes a repulsive thrust that separates it from the flow of process material. Usually, these machines are accompanied by magnetic separators with mechanical expulsion (shower heads, vanes, etc.), to also recover the stainless fraction, which is completely inert to eddy current machines.