Patent classifications
F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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F27
FURNACES; KILNS; OVENS; RETORTS
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F27B
FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
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7/00
Rotary-drum furnaces, i.e. horizontal or slightly inclined
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F27B7/14
with means for agitating or moving the charge
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F27B7/16
the means being fixed relatively to the drum,; e.g. composite means
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F27B7/161
the means comprising projections jutting out from the wall
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F27B7/162
the projections consisting of separate lifting elements, e.g. lifting shovels
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