Method and device for rinsing an overflow chamber at the bath-side end of a snout of a device for hot-dip coating
An overflow chamber, hot dip coating technology, applied in hot dip coating processes, cleaning methods and utensils, chemical instruments and methods, etc.
Pending Publication Date: 2022-01-21
SMS GRP GMBH +1
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- Description
- Claims
- Application Information
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Problems solved by technology
[0003] The flushing process known from the above-mentioned prior art has the disadvantage that the flushing process can only be operated when the nose with the overflow chamber is immersed in the metal melt
Method used
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Embodiment Construction
[0011] In particular, the figure shows a plant 100 for hot dip coating a metal strip 200 with a metal melt 120 . The metal melt 120 is located in the container 110 . The metal strip 200 is deflected in the metal melt by deflection rollers 115 inside the container. The metal strip is guided through a nose 130 before entering the metal melt 120 , wherein the nose ensures that the metal strip is guided under an inert gas atmosphere before entering the melt 120 . At its groove-side end, the nose 130 has at least one, preferably two or four, overflow chambers 132 connected in fluid communication with one another. The overflow chamber is used to contain residual slag or impurities on the surface of the metal melt around the metal strip. A suction pump 150 is provided in order to preferably continuously suck the impurities out of the overflow chamber; in this way it is prevented that said remaining slag or impurities come into contact with the just-plated metal strip and are there ...
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The invention relates to a method for rinsing an overflow chamber (132) at the bath-side end of a snout (130) of a device for hot-dip coating a metal strip. The snout is used to guide the metal strip (200) in a protective gas atmosphere before the metal strip is coated with a metal melt (120). According to the invention, a rinsing cycle is carried out in the overflow chamber (132) of the snout (130) by feeding metal melt preferably from the molten bath into the overflow chamber (132) and at the same time, sucking and pumping said melt out of the overflow chamber back into the molten bath. To enable this rinsing cycle to be performed not only when the suction snout is immersed in the molten bath but also when it has been withdrawn from the melt, the invention proposes that the snout with the overflow chamber (132) is retracted from the molten bath at least to the extent that no more melt can flow over an overflow edge (134) in the interior of the snout into the overflow chamber and that the rinsing cycle can be carried out even when the snout (130) has been retracted from the melt by supplying the melt from the molten bath to the overflow chamber (132) with the aid of a delivery pump (160).
Description
technical field [0001] The invention relates to a method for flushing an overflow chamber at the groove-side end of a furnace nose of a device for hot-dipping a metal strip by using a metal melt. Furthermore, the invention also relates to the described hot-dipping installation with the necessary components for carrying out the method. Background technique [0002] European patent document EP2989226B1 discloses a device for continuous hot dip coating of metal strips. The apparatus comprises a container containing a molten metal for conducting the metal strip, and a nose for conducting the metal strip in an inert gas environment after the metal strip has left the metal melt. At its slot-side end, the nose has at least one overflow chamber for receiving impurities from the surface of the metal melt around the freshly coated metal strip. The device also has a reciprocating lifting device for removing the nose from the molten metal and / or for lowering the nose into the molten m...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C23C2/00B05C3/12
CPCB05C3/125C23C2/00C23C2/00344C23C2/004C23C2/325C23C2/50C23C2/00322C23C2/14B08B9/08B08B2209/08C23C2/40
Inventor L·库梅尔J·贝尔根J-P·克鲁赞O·山德尔
Owner SMS GRP GMBH