Sorting of mixed lightweight packaging materials for recycling - subjecting successively to screening, removal of film magnetic and other metal, vibration sorting, and finally removal of foam by suction

摘要

In the process of recycling lightweight packaging materials, they are split up into their individual items if necessary first, they are next sepd. into small and corase materials, films are drawn off, and lightweight material is sepd. from heavier by a vibration sortation. Bags and powders are removed from the material first (2), the powder being return later (6) to join the disintegrated bags. The material is next screened into fines (8) and corase (9) fractions. From the remaining intermediate fraction (10) films are removed (12). The residue passes through a magnetic separator (14) and then a fluidised bed (17) where non-ferrous metals are removed. The remainder is vibration-sorted (20); heavy particles pass (21) to another screen (22) for removal of hollow articles, cups etc. (23,24). The rest of the material is again vibrated (26) and heavier pieces are sepd. (27). The residue goes to an impact type separator where e.g. drink cartons are removed, leaving e.g. foam to be drawn off by vacuum. ADVANTAGE - The system and procedure virtually eliminate manual operations. Individual non-disintegrated fractions or light-weight types of packages can be sepd.