Dust reduction in delivery of particulate commodities

An apparatus for reducing dust emissions from particulate commodities during discharge from an outlet, comprising:

• a curved duct having an upward facing inlet and terminating in the outlet, wherein the outlet has an inclined, downwardly-facing orientation, and wherein the curved duct is enclosed from the inlet to the outlet;
• and
• a delivery source arranged to deliver particulate commodities under gravity to the inlet at least at a predetermined delivery velocity of at least 5 meters per second without additional driving force through the duct, thereby causing dust to arise from the particulate commodities,
• wherein the curvature of the curved duct is arranged to cause said dust to be re-entrained within the commodities as the commodities are diverted from a straight path by the curvature of the duct,
• wherein the curved duct comprises a substantially rectangular cross-section with substantially flat side walls, a curved inner wall corresponding to an inner radius portion of the curved duct and a curved outer wall corresponding to an outer radius portion of the curved duct, and
• wherein a portion of the curved inner wall comprises an air-restrictive flap extending inwardly into the curved duct upstream of the outlet and coupled to the interior of curved inner wall, the flap including a trailing edge arranged to rest in use just above the stream of particulate commodities issuing from the outlet.