A dedusting apparatus for cleaning contaminates from particulate material, comprising: a housing defining a dedusting area for removing contaminates from particulate material and having a product discharge opening; a motor mounted on a mounting plate configured to be vertically movable relative to the housing, said mounting plate being engagable with an adjustable stop member that defines a lowermost position of said mounting plate; an infeed opening located at an upper portion of said housing to receive a supply of particulate material, said infeed opening including a sloped floor to direct particulate material downwardly toward an infeed port; a metering device located within said infeed opening and being operable to control the flow of particulate material through said infeed port, said metering device including a conical member formed from stainless steel and being mounted on an output shaft of said motor such that said conical member is vertically adjustable with said motor so that the lowermost position thereof can be located above said sloped floor of said infeed opening; a Venturi chamber positioned to receive particulate material passing through said infeed port and to remove dust and debris from the particulate material by a flow of air passing upwardly through the product discharge opening into the Venturi chamber, while cleaned particulate material is able to fall through the product discharge opening; and a discharge conduit positioned above the Venturi chamber to receive dust and debris laden air moving upwardly from said Venturi chamber, said discharge conduit moving said dust and debris laden air remotely from said dedusting area. a housing defining a dedusting area for removing contaminates from particulate material and having a product discharge opening; a motor mounted on a mounting plate configured to be vertically movable relative to the housing, said mounting plate being engagable with an adjustable stop member that defines a lowermost position of said mounting plate; an infeed opening located at an upper portion of said housing to receive a supply of particulate material, said infeed opening including a sloped floor to direct particulate material downwardly toward an infeed port; a metering device located within said infeed opening and being operable to control the flow of particulate material through said infeed port, said metering device including a conical member formed from stainless steel and being mounted on an output shaft of said motor such that said conical member is vertically adjustable with said motor so that the lowermost position thereof can be located above said sloped floor of said infeed opening; a Venturi chamber positioned to receive particulate material passing through said infeed port and to remove dust and debris from the particulate material by a flow of air passing upwardly through the product discharge opening into the Venturi chamber, while cleaned particulate material is able to fall through the product discharge opening; and a discharge conduit positioned above the Venturi chamber to receive dust and debris laden air moving upwardly from said Venturi chamber, said discharge conduit moving said dust and debris laden air remotely from said dedusting area.