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Method and device for controlling thickness of steel wire hot-plating layer

A technology for control equipment and control methods, applied in hot dip plating process, coating, metal material coating process, etc., can solve the problems of difficult hot coating thickness, poor working conditions, air pollution, etc., to achieve easy automation, low consumption Low cost, guaranteed uniformity

Inactive Publication Date: 2010-03-10
TIANJIN GONGDA GALVANIZING EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there are also some problems: 1. Due to the high aluminum content in the Galfan alloy, it is easy to produce alumina floats on the surface of the plating solution. If it is not cleaned in time, it will stick to the surface of the steel wire coating when it reaches a certain thickness, seriously affecting Surface Quality of Galfan Alloy Coatings
2. Although the desired coating thickness can be obtained by adjusting the gas flow and pressure of the air knife, it still depends on the experience of the operator: the same air knife will have significantly different effects in the hands of different operators, and the treatment effect unstable
3. Uneven coating of steel wire
However, the study found that under the same line speed, the coating weight of the hydrogen sulfide wiping method is lower, and the H 2 S is harmful to the human body, irritating the human respiratory system, poor working conditions, while H 2 Combustion of S produces SO 2 , causing air pollution, not environmentally friendly
[0008] In addition, the coating quality of the product obtained by the above-mentioned wiping method is not very good, including: the thickness of the hot coating is difficult to control, the thickness of the coating is uneven, the production efficiency is low, and the DV value of steel wire production (DV value refers to the difference between the diameter of the steel wire and the speed of the wire) Product, indicating production efficiency) is generally not greater than 90, and when the DV value is greater than 90, the amount of zinc on the steel wire is generally greater than 300g / m 2 , which increases the production cost

Method used

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  • Method and device for controlling thickness of steel wire hot-plating layer
  • Method and device for controlling thickness of steel wire hot-plating layer
  • Method and device for controlling thickness of steel wire hot-plating layer

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Using the method and equipment of the present invention to implement hot-dip galvanizing of steel wire with a product diameter of 1.6mm, the zinc amount is required to be 150g / m 2 . The process design is: line speed 60m / min, DV=96, wiping gas pressure ≥0.5Mpa, wiping gas flow rate 30L / min, wiping gas heating temperature 280℃; wiping electromagnetic force is 35A. The diameter of the internal electromagnetic coil of the electromagnetic wiper 4 The long oval coil made of copper tube, the electromagnetic wiper 4 cuboid structure size is 500mm×70mm×150mm, the power of the magnetic field generator 3 is 5KW, the frequency is 3KHz, the magnetic wiper 4’s magnetic field force is 35A, cycle The cooling water temperature is 20℃; the power of the gas heating box 8 is 2KW, the wiping gas pressure is ≥0.5Mpa, the wiping gas flow rate is 30L / min, and the wiping gas heating temperature is 280℃. After testing, the zinc content of the steel wire product obtained is 155g / m 2 , The thickne...

Embodiment 2

[0040] Using the method and equipment of the present invention to implement hot-dip galvanizing of steel wire with a product diameter of 6.0mm, the zinc amount is required to be 300g / m 2 . The process design is: line speed 80m / min, DV=480, wiping gas pressure 1.0Mpa, wiping gas flow rate 50L / min, wiping gas heating temperature 330℃; wiping electromagnetic force is 50A. The diameter of the internal electromagnetic coil of the electromagnetic wiper 4 of the equipment The oblong coil made of copper tube, the electromagnetic wiper 4 cuboid structure size is 500mm×70mm×150mm, the power of the magnetic field generator 3 is 5KW, the frequency is 3KHz, the magnetic wiper 4’s magnetic field force is 50A, cyclic The cooling water temperature is 20℃; the power of the gas heating box 8 is 2KW, the wiping gas pressure is 1.0Mpa, the wiping gas flow rate is 30L / min, and the wiping gas heating temperature is 330℃. After testing, the zinc content of the obtained steel wire product is 310g / m 2...

Embodiment 3-6

[0042] The method and equipment of the present invention are used to implement hot-dip galvanizing of steel wires with diameters of 2.5mm, 3.5mm, 4.0mm and 5.0mm respectively, and the required zinc amount is 250g / m respectively 2 , 280g / m 2 , 300g / m 2 And 300g / m 2 . The other process conditions are designed as follows: the line speed is 60m / min, 70m / min, 77m / min, and 80m / min, the DV value is 150, 245, 308, and 400 respectively, and the wiping gas pressure is ≥1.0Mpa. The wiping gas flow rates are 35L / min, 35L / min, 40L / min and 40L / min. The wiping gas heating temperature is between 280℃, 280℃, 330℃ and 330℃; the wiping electromagnetic force is 28A, 35A, 40A and 47A. The diameter of the internal electromagnetic coil of the electromagnetic wiper 4 of the equipment The oblong coil made of copper tube, the electromagnetic wiper 4 cuboid structure size is 500mm×70mm×150mm, the power of the magnetic field generator 3 is 5KW, the frequency is 3KHz, the magnetic wiper 4’s magnetic force...

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Abstract

The invention relates to a method and a device for controlling the thickness of a steel wire hot-plating layer. The control method comprises an inert gas swabbing process, a cooling process and a cutting-off process which are carried out in sequence and is characterized in that: the hot-plating steel wire after the inert gas swabbing process is vertically leaded out for continuously performing electromagnetic swabbing process and then performing cooling and cutting-off processes; the magnetic field acted in the electromagnetic swabbing process is a single-phase and alternative uniform magneticfield, wherein the acted magnetic field force ranges from 20A to 1000A. The control device comprises a gas swabbing device used in the inert gas swabbing process and is characterized by being suitable for the control method in the invention. The control device further comprises an electromagnetic swabbing device which is vertically mounted above the gas swabbing device and ensures that the leading line of the hot-plating steel wire from the electromagnetic swabbing device maintains vertical; the electromagnetic swabbing device comprises an electromagnetic swabbing device, a magnetic field generator and an automatic electric cabinet electrically connected with the electromagnetic swabbing device in sequence; the automatic electric cabinet comprises a magnetic field generator master controller and a gas swabbing automatic electric cabinet; and the electromagnetic swabbing device and the magnetic field generator are provided with a set of constant-temperature cooling systems.

Description

Technical field [0001] The invention relates to a steel wire hot plating technology in the metallurgical industry, in particular to a method and equipment for controlling the thickness of a steel wire hot plating layer. Background technique [0002] Hot-dip galvanizing of steel wire is one of the most basic and effective anti-corrosion processes. [0003] Current or traditional hot-dip plating methods are mainly solvent method and gas reduction method. [0004] The general process of the solvent method is: pay off-degreasing-washing-alkaline washing-washing-pickling-electrolysis-assisting-drying-hot-dip galvanizing or ganlfan alloy-wiping-cooling-take up. [0005] The general process of the gas reduction method: pay off-electrolysis-assisted plating-redox-hot dip galvanizing or ganlfan alloy-wipe-cooling-take up. [0006] Both of these methods require a wipe process to reduce the thickness of the steel wire coating and ensure the smoothness of the galvanized surface of the steel wire. ...

Claims

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Application Information

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IPC IPC(8): C23C2/24C23C2/38C23C2/06
Inventor 温鸣赵树鹏曹晓明
Owner TIANJIN GONGDA GALVANIZING EQUIP CO LTD
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