Installation for dip coating of a metal strip

Plant for the continuous dip-coating of a metal strip (1) of the type 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 (13a) of which duct (13) is immersed in the liquid metal bath (12) in order to define with the surface of the said bath (12), and inside this 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 (13a), 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 said duct (13) in order to form at least two compartments (21;
• 23) for recovering the metal oxide particles and intermetallic compound particles and in that this duct (13) has a fixed upper part (30) and a movable lower part (31) joined together by a deformable element (32) and means (35) for positioning the movable lower part (31) of the said duct (13) with respect to the metal strip (1).