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Method for applying an aqueous treatment solution to the surface of a moving steel strip

A technology for treating solutions and steel strips, which can be used in pretreatment surfaces, devices for coating liquids on surfaces, spray devices with movable outlets, etc., which can solve problems such as aging of water-like treatment solutions and achieve the effect of avoiding waste water.

Active Publication Date: 2015-01-21
THYSSENKRUPP AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, with chrome-free passivators for passivating tinplate surfaces, problems arise with the aging of aqueous treatment solutions in dipping tanks

Method used

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  • Method for applying an aqueous treatment solution to the surface of a moving steel strip
  • Method for applying an aqueous treatment solution to the surface of a moving steel strip

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Embodiment Construction

[0017] exist figure 1 A device for carrying out the method according to the invention for applying an aqueous treatment solution to the surface of a moving steel strip is schematically shown in . In this case, the steel strip 1 is guided by a plurality of deflecting rollers U, and the steel strip moves in the belt running direction at a preset belt speed v, at figure 1 The direction of travel of the belt is marked with an arrow in . Here, the belt speed is generally greater than 200 m / min and a maximum of 750 m / min. The steel strip 1 can be, for example, a metal-coated and cold-rolled steel strip, such as a white iron belt or a galvanized steel strip. However, it can also be an uncoated steel belt, such as a black iron belt.

[0018] With this transport device, not shown, the steel belt 1 is moved at a predetermined belt speed v in the direction of belt travel and is guided by deflection rollers U in the process. First, the steel belt 1 is guided through the first drying d...

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PUM

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Abstract

An apparatus and method for the application of an aqueous treatment solution onto the surface of a steel strip that is moved, at a prespecified strip speed, in a direction of movement of the strip, with the following steps: drying of the moving steel strip with a gas flow; application of the aqueous solution on at least one surface of the steel strip with a rotary sprayer with several spray rotors that are situated next to one another, transverse to the direction of movement of the strip, to which the aqueous treatment solution is supplied and which are rotated by a drive, so as to spray the treatment solution, as a result of centrifugal force, in the form of a spray jet, onto the surface of the steel strip and, there, to form a wet film of the aqueous treatment solution; equalization of the applied wet film of the aqueous treatment solution by driven smoothing rollers; and drying of the applied wet film of the aqueous treatment solution.

Description

technical field [0001] The present invention relates to a method and apparatus for applying an aqueous treatment solution to the surface of a steel strip moving at a predetermined belt speed in the direction of belt travel. Background technique [0002] It is known from the prior art to treat the surface of the steel strip, which is coated with a corrosion-resistant metal protective layer, with a post-treatment agent after the metal coating has been applied, in order to make the coated steel plate resistant to oxidation and to reduce the friction value, This makes it easier to process the coated steel sheet in subsequent processing, for example in the production of packaging containers. From DE 10 2005 045 034 A1, for example, a method is known for passivating the surface of metal-coated steel strip, in particular tinplate (tin-coated steel sheet), in which water-like surface-activating substances are mixed The solution is sprayed onto the surface of the steel strip moving ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D1/36B05D1/02
CPCB05C11/025B05D1/02B05D1/40C25D11/34C23C22/00B05B3/02C23C22/76B05D3/12B05C11/021B05D3/0466B05D3/002B05D3/0218B05D3/0254B05D2202/10B05D2252/02
Inventor 安德烈亚·马尔曼迈克尔·维尔德保罗·米歇尔斯
Owner THYSSENKRUPP AG
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