Method and apparatus for sorting plastic refuse

摘要

A method for sorting plastic refuse makes use of the different relative densities of the different types of plastic. The sorting takes place in that the comminuted refuse is introduced into a liquid medium having a predetermined relative density, the heavier parts then sinking and the lighter parts floating so that they can be removed separately. This sorting method can be repeated by the use of a plurality of liquid media of graded relative densities. An apparatus for sorting plastic refuse of different relative densities comprises one or more containers which in each case are filled with a liquid of predetermined relative density and contains a removing apparatus for the particles which have sunk to the bottom and a further removing apparatus for the floating particles. The particles removed at the top then pass via a drying drum to the filling station. Containers of this type can be connected one behind the other in any desired number and having liquids of increasing relative density.