C - Chemistry – Metallurgy – 21 – B
Patent
C - Chemistry, Metallurgy
21
B
39/59
C21B 7/18 (2006.01) F27B 1/20 (2006.01)
Patent
CA 1332506
Bell-and-hopper apparatus for a shaft furnace comprises two feed hoppers (3, 7), of which the upper feed hopper (3) is rotatable through a drive device and defines a lock chamber which is closable in pressure-tight manner by means of a stationary hood (4) equipped with charging flaps (2). For sealing of the hood (4) against the upper hopper (3), an encircling flexible, inflatable bellows (6) is arranged at the hood (4) and is pressable pneumatic- ally or hydraulically against the wall of the upper hopper (3). during charging of the upper hopper (3), one of the charging flaps (2) is opened, the bellows (6) is free of pressure and the upper hopper (3) is rotated during or shortly after the charging. For charging of the lower hopper (7), the flaps (2) of the upper hopper (3) are closed, the bellows (6) is inflated and the upper lock chamber (3) is disposed under excess pressure.
545691
Henneken Bernhard
Kammerling Bruno
Krause Hans
Scholz Eckhard-K.
Schroder Wolfgang
Gowling Lafleur Henderson Llp
Sms Schloemann-Siemag Ag
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