Tioxide Group Services Limited

Kevan R Reilly

John F Davidson

An improved kiln for the calcination of a powder comprises a directly heated rotary kiln in which at least a part of the inner circumferential wall is equipped with a plurality of protrusions. The protrusions are shaped so that the powder is substantially not lifted during operation of the kiln. In a preferred embodiment the protrusions have the shape of a triangular prism and are positioned within the kiln so as to pass through the powder in the manner of a plough. Preferably the top face of the prism is an isosceles triangle in which the equal angles are greater than the angle of repose of the powder for which the kiln is designed.

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Ingleby Barwick, United Kingdom

Kevan R Reilly