Preheating type upper heating steel wire galvanizing furnace

Abstract

The invention relates to a preheating-type upwardly-heating steel wire zinc-plating furnace. The preheating-type upwardly-heating steel wire zinc-plating furnace comprises a zinc furnace, a zinc pot and a water-cooled wire guiding mechanism, wherein a wire shouldering roller is arranged above the zinc pot and at the position close to the front end of the zinc furnace; a press roll is arranged above the zinc pot and at the position close to the back end of the zinc furnace; the preheating-type upwardly-heating steel wire zinc-plating furnace is characterized in that a zinc pot upwardly-heating device is arranged above the zinc furnace; a steel wire preheating system is arranged in front of the zinc furnace; the steel wire preheating system comprises steel wire preheating box furnaces, an air preheater device and the zinc pot upwardly-heating device; two steel wire preheating box furnaces are symmetrically arranged left and right; the air preheater device is arranged between the two steel wire preheating box furnaces; a flue gas inlet of the air preheater device is communicated with the front end of a flame path of the zinc pot upwardly-heating device through a first flue gas heat-preserving connection pipeline; a flue gas outlet of the air preheater device is communicated with flue gas inlets of preheating flame paths of the steel wire preheating box furnaces through a second flue gas heat-preserving connection pipeline. The preheating-type upwardly-heating steel wire zinc-plating furnace can prolong the service life of the zinc pot, save energy and effectively improve the zinc-plating quality and the zinc-plating speed.

Description

technical field [0001] The invention relates to a device for galvanizing metal wires, in particular to a preheating type upper heating steel wire galvanizing furnace. Background technique [0002] In order to improve the corrosion resistance of the steel wire, it is usually necessary to galvanize the surface of the steel wire and cover a layer of metal zinc on the surface of the steel wire. [0003] The general process of galvanizing operation is as follows: (1), first use alkaline liquid to carry out alkaline cleaning on the steel wire, and then use clean water to wash off the alkaline cleaning liquid on the surface of the steel wire; (2), then use acidic liquid to pickle the steel wire, Then wash off the acidic liquid adhering to the surface of the steel wire with clean water; (3), then dip-coat the surface of the steel wire with ammonium chloride or zinc chloride and other plating fluxes, and after drying, make the steel wire go through a bath where the zinc liquid is mel...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the traditional galvanizing method is to galvanize the steel wire at room temperature directly into the zinc solution, which mainly has the following defects: (1) The zinc pot is usually open, because the solidification temperature of zinc is 421°C Therefore, in order to ensure the normal galvanizing process, the temperature of the zinc liquid should be maintained at 445°C~460°C. For this reason, it is necessary to have a high enough temperature to heat the zinc pot, which will waste energy on the one hand and make the pot body is more susceptible to corrosion damage

(2) The steel wire directly enters the zinc liquid without preheating. Since the temperature of the steel wire just entering the zinc liquid is much lower than the temperature of the zinc liquid, the zinc liquid around the steel wire is suddenly cooled down, and zinc lumps will condense on the surface of the steel wire. In order to ensure normal Therefore, it is necessary to use the heat of the zinc liquid to melt these agglomerates before galvanizing. This requires setting a length of melting these agglomerates in the zinc pot, and the speed of the steel wire cannot be too fast, which will lead to production efficiency. not tall

(3) Since the temperature of the zinc solution needs to be maintained at 445°C~460°C, it is required that the temperature change of the zinc solution should not be too large, and the heat of the zinc solution absorbed by the steel wire will increase the temperature change of the zinc solution and affect the galvanizing effect

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