Toothed grate for rotary kiln peripheral discharge openings
AssigneeMetso Minerals Industries, Inc.
InventorsSamuel A. Miller, Thomas H. Luepke, Jr.
Life of this patent
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Abstract
A rotary kiln for pyroprocessing particulate material includes a cylindrical kiln shell supported for rotation about a longitudinal central axis. The kiln has a plurality of circumferentially spaced peripheral openings provided in the kiln shell near its exit end for discharging pyroprocessed particulate material therethrough. A raised grate disposed over each discharge opening has a generally convex geometric profile that projects into the interior of said kiln shell.
Claims22
A rotary kiln for pyroprocessing particulate material, comprising:
- a cylindrical kiln shell supported for rotation about a longitudinal central axis, said kiln shell having a material inlet end and a material exit end and being inclined with respect to said horizontal plane downwardly toward said exit end enabling particulate material to be pyroprocessed within its interior as said kiln shell rotates;
- a plurality of circumferentially spaced peripheral openings provided in the kiln shell near said exit end for discharging pyroprocessed particulate material therethrough before reaching said exit end;
- and
- a raised grate disposed over each discharge opening, said grate having a generally convex geometric profile that projects into the interior of said kiln shell.
A grate assembly for covering a peripheral discharge opening provided in a rotary kiln shell, comprising:
- a grate support having a body portion with an inner side, an outer side and a port formed therethrough defining a central axis, and a lip projecting from the outer side of said body portion coincident with said central axis to define a seat on the outer side of said body portion whereby said seat engages a rotary kiln shell when said lip is received within a peripheral discharge opening provided in the rotary kiln shell;
- and
- a raised grate covering said port, said grate having a generally convex geometric profile that projects beyond the inner side of said grate support.
A grate for covering a peripheral discharge opening provided in a rotary kiln shell, comprising:
- a grid portion;
- a plurality of feet spaced from and extending substantially parallel to said grid portion;
- a plurality of legs interconnecting said grid portion and said feet;
- said grid portion feet and legs being integrally formed of a plurality of spaced lengthwise extending bars and a plurality of crosswise extending bars so as to have a generally convex geometric profile.
Dependencies are inferred from the claim text.