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

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 magnetic field, 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

A method and device for controlling the thickness of steel wire hot-dip coating technical field The invention relates to a steel wire hot-dip technology in the metallurgical industry, in particular to a method and equipment for controlling the thickness of a steel wire hot-dip layer. Background technique Steel wire hot-dip galvanizing is one of the most basic and effective anti-corrosion processes. The current or traditional hot-plating methods are mainly solvent method and gas reduction method. The general process of the solvent method is: wire setting-degreasing-water washing-alkali washing-water washing-pickling-electrolysis-assisted plating-drying-hot-dip galvanizing or ganlfan alloy-wiping-cooling-wire take-up. The general process of gas reduction method: wire setting-electrolysis-fluxing-redox-hot-dip galvanizing or ganlfan alloy-wiping-cooling-wire take-up. These two methods all need to use the wiping process to reduce the coating thickness of the steel wire a...

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 research found that under the same wiring speed, the coating weight of the hydrogen sulfide wiping method is lower, and H2S is harmful to the human body, stimulates the human respiratory system, and the working conditions are poor. At the same time, the combustion of H2S will produce SO2, causing air pollution. Not environmentally friendly

In addition, the quality of the coating 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 / m2, which increases the production cost

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