Patent ID: 6923864

Claim:
A plant for the continuous dip-coating of a metal strip ( 1 ), comprising: a tank ( 11 ) containing a liquid metal bath ( 12 ), a duct ( 13 ) through which the metal strip ( 1 ) in a protective atmosphere runs and the lower end ( 13 a ) of which duct ( 13 ) is immersed in the metal bath ( 12 ) in order to define with the surface of the metal bath ( 12 ), and inside the duct ( 13 ), a liquid metal seal ( 14 ), a roller ( 15 ), placed in the metal bath ( 12 ), for deflecting the metal strip ( 1 ) and means ( 16 ) for wiping the coated metal strip ( 1 ) on leaving the metal bath ( 12 ), characterised in that the duct ( 13 ) is extended, in its lower part ( 13 a ), by at least two internal walls ( 20 ; 22 ) each located on one side of the strip ( 1 ) and directed towards the surface of the metal bath ( 12 ) in the duct ( 13 ) in order to form at least two compartments ( 21 ; 23 ) for recovering metal oxide particles and intermetallic compound particles, and in that the duct ( 13 ) has a fixed upper part ( 30 ) and a movable lower part ( 31 ) joined together by a deformable element ( 32 ) formed by a bellows, and means ( 35 ), for positioning the movable lower part ( 31 ) of the duct ( 13 ) with respect to the metal strip ( 1 ), comprising two actuating members ( 35 a , 35 b ), linked to the lower part ( 31 ), to move the lower part in translation parallel to the surface of the metal bath ( 12 ).