US 4,083,678 AGranted

Rotary kiln

AssigneeTennessee River Pulp & Paper Company

InventorTommy L. Rickman

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Abstract

A rotary kiln for treating material (e.g., for burning lime). The kiln includes a rotatable, hollow body for receiving material such as wet lime mud (i.e., limestone). The body has an opened end to allow the material to exit the body after it has been treated.A shroud is provided to cover the opened end of the body. The shroud includes a grate for allowing particles of the material of a certain maximum size to pass therethrough and includes a chute for allowing particles of the material of a size greater than the maximum size capable of passing through the grate to pass therethrough. A pair of outwardly extending arm members are fixedly attached to the opened end of the body for rotation therewith and for moving any particles of the material of a size greater than the maximum size capable of passing through the grate to the chute of the shroud for passage therethrough.

Claims5

Dependent claims

A rotary kiln for treating material, said kiln comprising:

(a) hollow body means for receiving a quantity of material to be treated, said body means including an opened end for allowing the material to exit said body means after it has been treated;
(b) means for rotating said body means;
(c) shroud means for covering said opened end of said body means, said shroud means including grate means for allowing particles of the material of a certain maximum size to pass therethrough and including chute means for allowing particles of the material of a size greater than the maximum size capable of passing through said grate means to pass theretherough;
and
(d) arms means fixedly attached to said body means for rotation therewith and for moving any particles of the material of a size greater than the maximum size capable of passing through said grate means to said chute means, said arm means including a first elongated arm member fixedly attached to said opened end of said body means and including a second elongated arm member fixedly attached to said opened end of said body means, said first and second elongated arm members extending outwardly of said opened end of said body means for passage over said grate means and said chute means when said body means rotates to move any particles of the material of a size greater than the maximum size capable of passing through said grate means to said chute means, each of said first and second elongated arm members including a substantially bladelike portion;
said chute means includes a substantially blade-like portion for coacting with said substantially blade-like portions of said first and second elongated arm members to shear in two any particles of the material that are of a size too large to easily pass through said chute means.

3 more elements

Dependencies are inferred from the claim text.