Patent ID: 7252251

Claim:
Treatment process for a mix of materials originating from residues from grinding of consumable articles at the end of their lives into fragmented form, to pre-concentrate this mix into recoverable materials and at least partly eliminate materials contaminating the recoverable materials, the mix to be treated includes: a fraction of recoverable materials having non-expanded synthetic polymer materials with various natures and/or compositions and/or shape factors, in the form of fragments varying from a rigid state to a flexible state, fractions of contaminating materials formed from mineral materials and/or metallic materials and/or organic materials other than non-expanded polymer materials and/or synthetic polymer materials in an expanded state, the process comprising: a) mechanically separating by screening and/or shape factor to at least partly extract the fractions of contaminating mineral materials from the mix of materials, b) aeraulically separating by gas flow the mix of materials originating from step a) from which the mineral materials fraction has been at least partly removed so as to output a first fraction (b 1 ) that includes a fraction of ultra-lightweight and/or expanded synthetic polymer materials, a second fraction (b 2 ) that includes a fraction of heavy materials and a third fraction (b 3 ) that includes a fraction of synthetic polymer materials to be recovered, in fragmented form varying from a rigid state to a flexible state, c) grinding the third fraction (b 3 ) of recoverable polymer materials originating from step b), to a liberation mesh of contaminating materials included in, adhering to or assembled with fragments of the third fraction of polymer materials to be recovered, d) mechanically separating by screening and/or aeraulically separating by gas flow the third fraction of synthetic polymer materials to be recovered originating from the grinding step c) to at least partly eliminate the fraction of contaminating materials released during grinding and to extract a fraction of recoverable materials forming the required mix, pre-concentrated into recoverable materials, and still containing contaminants.