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Electrostatic Separator

An Electrostatic Separator uses electrostatic charge to separate dry liberated particles of differing conductivity. The technology is commonly used in the mineral processing, plastics and recycling industries.

Description

Electrostatic Separation exploits the difference in electrical conductivity between various materials in a feed material to produce a separation.  The ability to produce a separation depends on a number of key material characteristics including conductivity, moisture content and size range.  In many applications, often due to the fine particle size, the Electrostatic Separator is the only technology that enables a separation (e.g. -2mm granulated cable scrap).  The technology also replaces less environmentally friendly separation processes such as froth flotation in mineral processing applications. (Zircon from silica sand separation).

The technology utilises the difference in conductivity between insulators (plastics) and conductors (copper and aluminium) to obtain a separation on an earthed roll. The insulators are pinned to the earthed roll via an image force whilst the conductors lose their charge and are throw from the roll by the centrifugal force generated.  Separations can also be achieved between particle of different conductivity (e.g. copper and aluminium).

Applications

Electrostatic Separators feature in plants processing beach sand minerals, producing plastics, and recycling secondary metals (e.g. plastics, metals, cable, and others). Typical applications:

  • Wire recycling:
    • Separate plastics (insulators) from conductors (Copper and Aluminium);
    • Separate conductors (Copper and Aluminium);
  • Secondary metal recycling; ( complex circuit boards)
  • Mineral processing (e.g. used in conjunction with high-intensity magnetic separators in separating beach sands);
  • Plastic recycling (e.g. shredded window frames separating aluminium from plastic);
  • WEEE

Models

The ElectroStatic Separator is supplied as either a single or double stage system.  There are three sizes designed to handle different capacities with feed widths of 500, 1000 and 1500mm.