C - Chemistry – Metallurgy – 21 – C
Patent
C - Chemistry, Metallurgy
21
C
39/13, 165/4
C21C 5/46 (2006.01) B01D 50/00 (2006.01) C21C 5/40 (2006.01)
Patent
CA 1038160
ABSTRACT OF THE DISCLOSURE Dust-laden waste gases from a converter and from ancillary equipment are exhausted by respective blowers through a first and a second duct to a main and a secondary scrubbing station whence the purified gases escape through respective chimneys. The first duct is provided with two cascaded washing stages, the upstream stage being operable to throttle or block the flow of gases therethrough. An annular cowl for the interseption of peripherally escaping converter gases is connected to a third duct which joins the first duct at a location between the two washing stages but is also connectable through a switching valve to the second duct. The switching valve is open in the blowing phase of the converter while a movable insert at the upstream washing stage unblocks the first duct; in the charging phase, the switching valve is closed and the insert at the upstream stage obstructs the first duct as the gases picked up by the cowl are drawn through the third duct and the downstream washing stage of the first duct for discharge through the chimney of the main scrubbing station.
220382
Hausberg Gerhard
Hegemann Karl-Rudolf
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