Allcontrols’ specialist sorting and separation solutions, including electrostatic separators, offer a cost-effective and profitable way of separating mixtures into high-purity fractions.
Allcontrols’ electrostatic (conductive/non-conductive) separation solutions include:
The Hamos KWS electrostatic metal/plastic separator
The Hamos KWS Electrostatic Separator can separate conductive and non-conductive fractions due to the differences between conductivity and de-charging characteristics of materials such as metal and plastics. The Hamos KWS can separate particles of up to 10mm in size.
All particles get charged by a corona (high-voltage) field and positioned on an earthed drum where discharging takes place.
Discharging constant τr = ε0 x εr x ρp
relative dielectricity εmetal
specific resistance ρmetal
Discharging only depends on material characteristics
- Typical values:
metals: relative dielectricity εmetal ≥ 100
specific resistance ρmetal ≤ 1 Ωm
plastics: relative dielectricity εplastic ≥ 1
specific resistance ρplastic ≤ 1014 Ωm
- Typical de-charging constants:
Metal τmetal = 10 –9 s
Plastic τplastic = 800 s
Conductive particles discharge.
- Typical product streams that are processed with the KWS include:
Cable granulate (from shaker tables) for the recovery of copper.