Abstract: Separation of glass from waste material by high tension techniques. The waste is sized to a range from 1/8 to 1 1/2 inches, dried to a moisture content less than 2%, air classified to remove low bulk density material, and subjected to magnetic separation to remove ferrous metal. The waste is then fed to the top of a rotating grounded drum and subjected successively to ion bombardment from corona discharge electrodes and to an electrostatic field from a static electrode. The glass remains pinned to the roll while other materials come off in the static field.

Abstract: Apparatus for separating non-ferrous metal from waste material comprising a grounded rotary conductive drum, means for feeding waste material to the drum, a D.C. corona electrode, an A.C. corona electrode, a D.C. static electrode and a splitter. The method of separation comprises magnetic separation of ferrous metals, sizing of the waste material, preliminary classification to remove dust and low density particles, drying to reduce the moisture content, feeding the waste material to the rotating grounded roll and subjecting the material successively to D.C. corona discharge, A.C. corona discharge and a D.C. electrostatic field.