Hot dip galvanized coating control method and apparatus

A control method and hot-dip galvanizing technology, applied in hot-dip plating process, coating, metal material coating process, etc., can solve the problem that it is difficult to accurately control the thickness of the coating, the thickness of the coating cannot be accurately controlled, and the galvanized layer is uneven. Coating and other problems, to avoid premature solidification, improve the surface quality and production efficiency of strip steel, and achieve the effect of stable operation

Active Publication Date: 2006-09-06
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology

The disadvantage of this method is that the working speed is limited, and the speed is limited to 80 m/min. If the speed is high, it will cause uneven coating with thick sides and thin middle of the galvanized layer; it is impossible to accurately control the thickness of the coating, especially 100 grams /Meter 2 The following coatings are even more impossible; operation and maintenance are very troublesome, and the rollers must be stopped for replacement after 5 to 7 days of use.
However, in the blowing hot-dip galvanizing method,

Method used

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  • Hot dip galvanized coating control method and apparatus
  • Hot dip galvanized coating control method and apparatus
  • Hot dip galvanized coating control method and apparatus

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Embodiment Construction

[0017] see figure 1 , the hot-dip galvanized zinc layer control device is installed on the top of the zinc pot 7 around the strip steel 1, and the strip steel 1 passes through the hot-dip galvanized zinc layer control device after the zinc pot 7 comes out, and the hot-dip galvanized zinc layer control device includes an electromagnetic generator 3. The electromagnetic generating device 3 generates an electromagnetic force F perpendicular to the strip steel 1 in the zinc liquid 2 attached to the surface of the strip steel 1 , and the action of the electromagnetic force F and gravity promotes the downward flow of the zinc liquid 2 attached to the surface of the strip steel 1 .

[0018] see figure 2 , image 3 , The electromagnetic generating device 3 is installed around the steel strip 1, and the electromagnetic generating device 3 includes an electromagnetic coil 31 and a current control device. see Figure 4 , the electromagnetic coil 31 is wound into a flat spiral shape, ...

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Abstract

The invention relates the hot galvanizing zinc layer controlling means and device. On the around of strip there is electromagnetic means to make the zinc coating produce electromagnetic force to make the zinc coating surface produce pressure, and if the electromagnetic force is more than the interfacial force, the thick of zinc coating is reduced, controlling the intensity of alternating field to control electromagnetic force. The invention has the advantages of easy adjustment, high control accuracy, and improving the surface quality and product efficiency of strip.

Description

(1) Technical field [0001] The invention relates to a method and a device for controlling the hot-dip galvanized zinc layer on the surface of strip steel on a hot-dip galvanizing continuous production line. (2) Background technology [0002] On the hot-dip galvanizing continuous production line, the strip steel is pulled out of the zinc liquid at a very fast speed, and a large amount of zinc liquid is taken away and solidified before returning to the zinc pot, and the higher the operating speed, the higher the amount of zinc taken away , As a result, the galvanized layer is thick and uneven. The existing hot-dip galvanizing production line adopts roller plating method and blowing method to control the galvanized layer. [0003] The roller plating method is to install a pair of galvanized rollers made of pure iron or low-carbon steel at the zinc liquid surface at the outlet of the zinc pot, let the strip pass through the gap, and adjust the pressure of the two rollers to red...

Claims

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Application Information

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IPC IPC(8): C23C2/24C23C2/06
Inventor 陈向勇张永杰
Owner BAOSHAN IRON & STEEL CO LTD
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