A post-plating cooling system and method for hot-dip galvanized steel strip with external electrostatic field

A cooling system and hot-dip galvanizing technology, applied in hot-dip plating process, coating, metal material coating process, etc., can solve the problems of difficult to reach liquid droplets, poor heat dissipation effect, poor product quality, etc., and achieve temperature gradient The effect of small size, fast cooling rate and improved coating quality

Active Publication Date: 2021-06-29
钢研工程设计有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above analysis, the present invention aims to provide a post-plating cooling system and method for hot-dip galvanized strip steel with an external electrostatic field, which is used to solve the problem that the liquid droplets in the existing spray cooling and heat dissipation are difficult to reach the surface of the coating and exchange contact with the coating. heat, resulting in poor cooling effect and poor product quality

Method used

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  • A post-plating cooling system and method for hot-dip galvanized steel strip with external electrostatic field
  • A post-plating cooling system and method for hot-dip galvanized steel strip with external electrostatic field
  • A post-plating cooling system and method for hot-dip galvanized steel strip with external electrostatic field

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Embodiment 1

[0038] A specific embodiment of the present invention discloses a post-plating cooling system for hot-dip galvanized strip steel with an applied electrostatic field, such as figure 1 As shown, it includes a spraying device 2, a high voltage device 9, a liquid supply device 6, an air supply device 5, a mist discharge device 4, a drainage device 8, an air cleaning device 7 and connecting pipes.

[0039] The liquid supply device 6 is used to provide water or ammonium dihydrogen phosphate (NH 4 h 2 PO 4 ) solution, the equipment of the two solutions is completely distinguished. The above-mentioned liquid supply device 6 includes a liquid storage tank, a liquid level gauge, a filter, an agitator, a heater, an automatic control valve and a circulating pump. The liquid storage tank is used to store water or ammonium dihydrogen phosphate (NH 4 h 2 PO 4 ) solution, the liquid level gauge is used to measure the liquid level, the filter is used to filter out impurities in the water...

Embodiment 2

[0050] Another embodiment of the present invention discloses a method for cooling hot-dip galvanized steel strip after plating with an external electrostatic field, comprising the following steps:

[0051] Step 1: Check whether each device of the post-plating cooling system with an external electrostatic field can work normally, check whether the gas volume in the gas supply device is sufficient, and add enough water or ammonium dihydrogen phosphate (NH 4 h 2 PO 4 ) solution.

[0052] Step 2: Start the high-voltage device, apply negative voltage to the tungsten wire, ground the roller contacting the strip steel, and form a high-voltage electrostatic zone between the strip steel and the tungsten wire.

[0053] Step 3: Start the air supply device, liquid supply device, spray device, vapor and mist discharge device, drainage device and air purification device in sequence, and use air to convert water or ammonium dihydrogen phosphate (NH 4 h 2 PO 4 ) solution is pressurized a...

Embodiment 3

[0055] In this embodiment, the hot-dip galvanized steel strip post-plating cooling system with the addition of an electrostatic field is installed above the air knife and in the zinc layer solidification and crystallization area below the upward vertical air-cooling section, and is used in combination with the air-cooling cooling device.

[0056] The strip steel 1 goes up from the zinc pot through the air knife to adjust the thickness of the coating, and then passes through the post-plating cooling system of the hot-dip galvanized strip steel with an external electrostatic field. The post-plating cooling system is composed of a spraying device 2, a steam mist discharge device 4, an air supply device 5, a liquid supply device 6, an air purification device 7, a drainage device 8, a high voltage device 9 and connecting pipes.

[0057] The air supply device 5 and the liquid supply device 6 provide the spray device 2 with the compressed air and liquid working medium required by the ...

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Abstract

The invention relates to a post-plating cooling system and method for a hot-dip galvanized steel strip with an external electrostatic field, which belongs to the technical field of metallurgical engineering and solves the problem that the liquid droplets in the existing spray cooling and heat dissipation are difficult to reach the surface of the coating and conduct heat exchange with the coating. Poor cooling effect and poor product quality. The post-plating cooling system of hot-dip galvanized strip steel with an external electrostatic field includes a spray device, a high-voltage device, a liquid supply device and an air supply device; the spray device includes a nozzle for spraying droplets on the strip, the nozzle and the liquid supply device and The air supply device is connected, the high-voltage device is used to charge the mist droplets generated by the spray device, the liquid supply device is used to provide the spray device with liquid capable of generating mist droplets, and the air supply device is used to provide the spray device with a liquid that turns the liquid into mist droplets. air. The invention realizes the contact heat exchange between the charged mist and the surface of the coating, greatly increases the cooling speed, improves the quality of the coating and the anti-corrosion performance of the steel strip.

Description

technical field [0001] The invention relates to the technical field of metallurgical engineering, in particular to a post-plating cooling system and method for a hot-dip galvanized steel strip with an external electrostatic field. Background technique [0002] Hot-dip galvanizing is a method of immersing steel materials in a molten zinc solution to form a metal coating on the surface. It is the most commonly used anti-corrosion technology for steel. In order to control the size of spangles, improve the bonding force and corrosion resistance of the coating, the strip needs to be cooled rapidly after leaving the zinc pot to ensure the quality of the coating. At present, the air cooling method is mostly used to cool the strip steel. Due to the small heat capacity of the air, the heat dissipation capacity is limited, and the cooling speed is slow, the crystal grains are easy to grow excessively during the zinc solidification process, which reduces the quality of the coating. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C2/06C23C2/28C23C2/40
CPCC23C2/06C23C2/28C23C2/40
Inventor 仲海峰王永亮韩冰张艳娟徐西波陈庆舍
Owner 钢研工程设计有限公司
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