Rotary calciner with mixing flights
AssigneeHarper International Corp.
InventorBruce J. Dover
Life of this patent
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Abstract
A rotary calciner for the treatment such as thermal treatment of particulate solids equipped with riffle flights, each in the form of an inverted V shape. The flights are arranged in at least two rows on the inner circumferential wall of the calciner, the rows being staggered so that the apex of each riffle flight is directly beneath the space between two riffle flights in the row above. The riffle flights provide continuous mixing and improve gas-solid contact curing rotation.
Claims7
An apparatus for the treatment of particulate material comprising a horizontally extending rotatable cylinder, at least two rows of riffle flights disposed on at least a portion of the inner circumferential wall of said rotatable cylinder, said rows being parallel to the horizontal longitudinal axis of said rotatable cylinder, each of said riffle flights being in the form of an inverted V-shape and positioned so that the apex of said inverted V-shape is directly in line with a space between two riffle flights in a row above it, said rotatable cylinder having a gas inlet means, a feed entry means, a product discharge means, and means for imparting rotation to said rotatable cylinder in the direction of said apex.
Dependencies are inferred from the claim text.