Method and device for rinsing an overflow chamber at the bath-side end of a snout of a hot-dip coating device

A method for rinsing an overflow chamber (132) at a bath-side end of a snout (130) of a device (100) for hot-dip coating a metal strip (200), wherein the snout is used to guide the metal strip in a protective gas atmosphere before the metal strip (200) is coated with a metal melt (120), comprising the steps of:

• carrying out a rinsing cycle in the overflow chamber (132) by
• feeding the metal melt (120) from a molten bath into the overflow chamber (132);
• and, at the same time,
• pumping the metal melt (120) out of the overflow chamber into the molten bath with a suction pump (150);
• wherein the snout (130) with the overflow chamber (132) is retracted from the molten bath at least to such an extent that no metal melt can flow over an overflow edge (134) in an interior of the snout (130) into the overflow chamber, and
• wherein the rinsing cycle is carried out even when the snout has been retracted from the molten bath by feeding the metal melt from the molten bath to the overflow chamber (132) with a delivery pump (160), and
• wherein a level of the metal melt (120) in the overflow chamber (132) is controlled to a predetermined target level (NTarget) even when the snout (130) is retracted by varying a power of the suction pump (150) and/or the delivery pump (160), and
• wherein the target level (NTarget) is below the overflow edge (134).

A method for rinsing an overflow chamber (132) at a bath-side end of a snout (130) of a device (100) for hot-dip coating a metal strip (200), wherein the snout is used to guide the metal strip in a protective gas atmosphere before the metal strip (200) is coated with a metal melt (120), comprising the steps of:

• carrying out a rinsing cycle in the overflow chamber (132) by
• feeding the metal melt (120) from a molten bath into the overflow chamber (132);
• and, at the same time,
• pumping the metal melt (120) out of the overflow chamber into the molten bath with a suction pump (150);
• wherein the snout (130) with the overflow chamber (132) is retracted from the molten bath at least to such an extent that no metal melt can flow over an overflow edge (134) in an interior of the snout (130) into the overflow chamber, and
• wherein the rinsing cycle is carried out even when the snout has been retracted from the molten bath by feeding the metal melt from the molten bath to the overflow chamber (132) with a delivery pump (160), and
• wherein no metal melt flows over the overflow edge (134) when the snout (130) is retracted from the molten bath.