Method and equipment for hot dip of steel wire

Abstract

The invention relates to a steel wire hot-dip coating method and equipment thereof. The method is characterized in that a single wire rod is sequentially processed by the following techniques of paying off, mechanical derusting, boron smearing, drawing, combined ultrasonic cleaning, chemical activation, compound annealing and deacidizing, hot-dip coating and wire collection; steel wire hot-dip coating is continuously completed; the ultrasonic frequency of the combined ultrasonic cleaning technique is 25-40KHz, the energy level density is 50-100w / l, the cleaning temperature is 40-70 DEG C, and the time is 0.5-1s; the chemical activation technique adopts weak organic acid activate fluid to treat, the activate fluid is manufactured by activating agent diluted by mass ratio of 10-20%, and the mass components of the activating agent are 3-6% of sodium nitrite, 10-15% of propane diacid and the rest of aminosulfonic acid, the activation temperature is 20-60 DEG C, and the time is 0.5-2s; the compound annealing and deacidizing technique is continuously carried out by high frequency induction heating and tubular heating, and annealing and deacidizing are simultaneously completed. The equipment are characterized by comprising a wire rod paying out machine, a mechanical derusting device, a boron smearing treatment facility, a steel wire drawing machine, a ultrasonic wave cleaner, a chemical activation groove, a compound annealing and reducing furnace, a hot-dip pan and a wire-rewinding machine which are sequentially connected with each other.

Description

Technical field [0001] The present invention relates to steel wire hot-dipping technology in the metallurgical industry, specifically a steel wire hot-dipping method and equipment suitable for high-efficiency and continuous production of a single steel wire, and safe and environmentally friendly. The main international patent classification number is proposed to be Int.Cl.C25D 3 / 00 (2006.01) I. Background technique [0002] Hot-dip galvanizing of metal products is one of the most basic and effective anti-corrosion processes. Hot-dip galvanized metal products include steel wires, plates, steel coils, steel pipes, structural parts, fasteners, etc. Among them, galvanized steel wire is an important category. [0003] Current or traditional hot-dip coating methods are mainly solvent method and gas reduction method. [0004] Solvent method is a hot-dipping process in which wire drawing and hot-dip plating lines are independent, and multiple steel wires travel at a low speed and are pl...

AI Technical Summary

Problems solved by technology

[0005] 1. Environmental protection issues: On the one hand, due to the pickling process, the discharge of waste acid and pickling water (more than 30 kilograms of waste acid and 4 tons of waste pickling water are produced for each ton of steel wire produced) and the acid produced during pickling air will pollute the environment

On the other hand, the discharge of other chemicals will also cause pollution

[0006] 2. High energy consumption: Since the annealing line and the hot-dipping line are independent, the steel wire needs to be heated twice, and the heat is wasted; ; reheat the steel wire to the hot-dip temperature during hot-dip plating), and reheat each ton of steel wire to lose at least 100 degrees of electric energy, wasting a lot of energy

In addition, if the multi-line low-speed simultaneous plating process is adopted, the production area is too wide, the heat dissipation is large, and the energy consumption is also high.

[0007] 3. The process is complicated and the production efficiency is low: one of the reasons is that the wire drawing, annealing and hot-dip process lines of the hot-dip process operate independently, with many procedures, complicated processes and low production efficiency; the second reason is that the acid of the hot-dip process Washing, fluxing, drying and hot-plating all take time, so its DV value (DV value refers to the product of steel wire diameter and wire speed, indicating production efficiency) is not more than 90, generally around 60

[0008] 4. High production cost: Due to the above problems, the production cost is high, the product profit is low, and the competitiveness is poor

[0011] 2. Cannot be used for high-strength steel wire

[0012] 3. Low production efficiency

Although there are a few reports on the production of low-carbon steel wire by the gas method in foreign countries, the production line is very long. When the DV value is 120, only the reduction process section is 18 meters long, and the improvement of production efficiency is limited.

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