Kiln for calcination of a powder
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United States of America Patent
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Apr 29, 1997
Grant Date -
N/A
app pub date -
Mar 20, 1995
filing date -
Mar 23, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
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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