Process and apparatus for the hot-dip coating of a metal strip with a metallic coating

A technology of metal coating and metal strip, which is applied to the surface coating liquid device, metal material coating process, hot-dip plating process, etc., can solve the problems of gas consumption and large interval between nozzle beam metal strips, etc., and achieve low Effects of consumption, optimum process stability, risk of reliable surface defects

Inactive Publication Date: 2014-08-20
THYSSENKRUPP STEEL EURO AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another disadvantage of this method is the environment, i.e. most of the air flow of the nozzle beam and the metal strip are separated so that the slag is also scraped from the bath surface at positions where there is no risk of slag penetrating the metal strip at all
This leads to unnecessary gas consumption

Method used

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  • Process and apparatus for the hot-dip coating of a metal strip with a metallic coating
  • Process and apparatus for the hot-dip coating of a metal strip with a metallic coating
  • Process and apparatus for the hot-dip coating of a metal strip with a metallic coating

Examples

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Embodiment Construction

[0071] The device 1 for the hot-dip coating of metal strip M comprises a molten bath 3 filled in a boiler 2 into which the metal strip M to be coated, heated in a known manner beforehand to a sufficient immersion temperature, enters this molten bath via a tuyere branch 4, where The metal strip is, for example, a cold-rolled steel strip made of corrosion-sensitive steel.

[0072] In the molten bath 3 , the metal strip M is deflected on guide rollers 5 in such a way that it leaves the molten bath 3 in the vertical direction of transport F. Therein, the metal strip M leaving the molten pool 3 passes through a stripping device 7 arranged at a distance above the surface 6 of the molten pool 3 . The stripping device here comprises stripping nozzles 8, 9 formed as slit nozzles, wherein one stripping nozzle directs the stripping air flow AG1 at the surface O1 of the metal strip M, which surface is between the longitudinal edges of the metal strip M. and another stripping nozzle direc...

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Abstract

The invention relates to an apparatus and a process for the hot-dip coating of a metal strip (M) with a metallic coating, in which the metal strip (M) is passed continuously through a molten bath (3), in which the thickness of the metallic coating that is present on the metal strip (M) when it leaves the molten bath (3) is set by means of a stripping device (7), and in which slag (S) that is present on the molten bath (3) is driven away from the metal strip (M) leaving the molten bath (3) by means of a stream of gas (G1, G2). In order to prevent slag from coming into contact with the metal strip leaving the molten bath by simple and inexpensive means in the case of such a process, and thus ensure optimum quality of the surface, to drive the slag (S) away from the metal strip (M), the invention proposes directing a stream of gas (G1, G2) that extends over the width (B) of the metal strip (M) onto the surface (6) of the molten bath (3) by means of at least one nozzle (10, 11) arranged closely alongside the metal strip (M).

Description

technical field [0001] The invention relates to a method for hot-dip metallizing a metal strip, in which method: the metal strip passes continuously through the molten pool; the thickness of the metal coating on the metal strip at the outlet of the molten pool is adjusted by means of a stripping device; The slag on the molten pool is removed from the metal strip leaving the molten pool. The metal strip coated in this way is usually hot-rolled or cold-rolled. [0002] The invention also relates to a device for hot-dip metal coating of a metal strip, wherein the device comprises a molten bath, transport equipment for continuously passing the metal strip through the molten bath, for adjusting the metal coating on the metal strip at the outlet of the molten bath Thickness stripping means and at least one nozzle injecting a gas flow that removes slag on the molten pool from the metal strip leaving the molten pool. Background technique [0003] A continuous hot-dip coating proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/00C23C2/14C23C2/16C23C2/18C23C2/20
CPCC23C2/16C23C2/003C23C2/14C23C2/00C23C2/20C23C2/18C23C2/00344C23C2/325C23C2/544C23C2/22C23C2/40B05C11/06B05D7/142B05C11/021
Inventor 克里斯托弗·古泽克约尔格·舒尔特马克·布卢梅瑙弗莱德·金德拉德克·楚普利那鲁道夫·舍南伯格
Owner THYSSENKRUPP STEEL EURO AG
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