Rotary-drum furnaces

FMECHANICAL ENGINEERING LIGHTING HEATING WEAPONS BLASTING ENGINES OR PUMPS F27Furnaces F27BFURNACES, KILNS, OVENS, OR RETORTS IN GENERAL OPEN SINTERING OR LIKE APPARATUS

F27B7/00Rotary-drum furnaces

F27B7/02of multiple-chamber or multiple-drum type F27B7/04with longitudinal divisions F27B7/06adapted for treating the charge in vacuum or special atmosphere F27B7/08externally heated F27B7/10internally heated F27B7/12tiltable F27B7/14with means for agitating or moving the charge F27B7/16the means being fixed relatively to the drum F27B7/161the means comprising projections jutting out from the wall F27B7/162the projections consisting of separate lifting elements F27B7/166the means comprising chains F27B7/167the means comprising partitions F27B7/18the means being movable within the drum F27B7/20Details, accessories, or equipment peculiar to rotary-drum furnaces F27B7/2016Arrangements of preheating devices for the charge F27B7/2025consisting of a single string of cyclones F27B7/2033with means for precalcining the raw material F27B7/2041consisting of at least two strings of cyclones with two different admissions of raw material F27B7/205with precalcining means on the string supplied with exhaust gases from the cooler F27B7/2058with precalcining means on each string F27B7/2066comprising a band transporter F27B7/2075Removing incrustations F27B7/2083Arrangements for the melting of metals or the treatment of molten metals F27B7/22Rotary drums Supports therefor F27B7/2206Bearing rings F27B7/224Discharge ends F27B7/24Seals between rotary and stationary parts F27B7/26Drives F27B7/28Arrangements of linings F27B7/30Arrangements of partitions F27B7/32Arrangement of devices for charging F27B7/3205Charging F27B7/33Arrangement of devices for discharging F27B7/34Arrangements of heating devices F27B7/36Arrangements of air or gas supply devices F27B7/362Introducing gas into the drum axially or through the wall F27B7/38Arrangements of cooling devices F27B7/383Cooling devices for the charge F27B7/386Rotary-drum cooler F27B7/40Planetary coolers F27B7/42Arrangement of controlling, monitoring, alarm or like devices