Importance

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Abstract

A method and apparatus for processing particulate material charged into a rotary cylindrical vessel (12) having its axis inclined to the horizontal so that one end thereof is raised relative to the other end, and having a respective annular cover plate (16,18) at each end defining a central opening at its end (17,19), the material being charged through the opening (17) at the one end thereof and caused to progress along the vessel (12) and discharge therefrom through the opening (19) at the other end by rotation of the vessel (12). Gas for processing the material is passed into the vessel (12) during rotation of the latter, the gas being supplied from a source thereof, via a supply pipe (34), and discharged within the material (38) in the vessel (12) through port means (44,48) of at least one discharge conduit (42) which is in communication with the supply pipe (34), extends longitudinally within the vessel (12) and is fixed against rotation with the vessel (12); the quantity of material (38) progressing along the vessel (12) being sufficient to cover the at least one conduit (42).

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First Claim