Patent ID: 8800777

Claim:
A dedusting apparatus for cleaning contaminates from particulate material, comprising: a cylindrical housing; a feed hopper supported on said housing and terminating in a product inlet opening; an air supply apparatus supported by said housing at a lower portion to provide a flow of air into said housing; an inverted conical wash deck and having an apex positioned centrally within said product inlet opening, said wash deck including a top surface formed with a plurality of apertures for the passage of air through said wash deck, said top surface being devoid of said apertures within a predetermined distance of said apex and having said apertures uniformly covering said top surface to provide a flow of air through said wash deck to remove contaminates from said particulate material flowing over said top surface, said wash deck being centrally supported within said housing to define a Venturi zone around said wash deck between said wash deck and said housing, said air supply apparatus directed a flow of air into said Venturi zone to clean particulate material falling off of said wash deck; and an air discharge collector for collecting air passing through said wash deck apertures and through said Venturi zone.