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Method for recovering metals from electronic waste containing plastics materials

  • US 8,800,775 B2
  • Filed: 11/13/2009
  • Issued: 08/12/2014
  • Est. Priority Date: 11/14/2008
  • Status: Active Grant
First Claim
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1. A method for treating materials containing a mixture of plastic and metal materials, said method comprising:

  • shredding the materials to be processed;

    performing pyrolysis of the shredded material;

    a first magnetic separation performed on the pyrolyzed materials, providing a ferrous metal fraction and, secondly, non-ferrous residues;

    a second magnetic separation performed on the non-ferrous residues, providing, on the one hand, a non-ferrous metal fraction and, on the other hand, non-magnetic residues containing precious metals, anda step of combustion of the gasses from pyrolysis,wherein the step of combustion of the gases from pyrolysis is followed by a step of neutralizing the gas with sodium bicarbonate.

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