Sink-float separation of plastics from waste material

摘要

Low density plastics is separated from waste material obtained when dressing scrap accumulators by a sink-float process. The floating material may comprise polyethylene and polypropylene, and the sinking material may comprise hard rubber, polystyrene, PVC, glass and lead components. The material which sinks is tumbled by a rotating conveyor 12 while it is being transported to an outlet opening 18 in the bottom of the separating vessel 11.