JPH11106882A - Snout device for continuous galvanizing line - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent abnormality of surface quality so as to stick the drops caused by the entrapment of a strip by again solidifying vaporized zinc from galvanizing bath surface and dropping the solidified zinc on the bath surface. SOLUTION: In the inner wall of a snout 1 at the upper part from the zinc bath surface, an ash receiver 2 having a horizontal part or an inclining part near the horizontal plane so as to receive the ash, is arranged. A sucking pining 3a opened so as to face to the bath surface in the snout, is introduced to outside of a bath vessel through the zinc bath, and a conveying pump is connected with the end part of the sucking piping 3a. An inert gas piping 4 and a nozzle 5 for blowing off the ash, are arranged at the upper part of the ash receiver 2 and in the inner wall of the snout.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a snout apparatus for a continuous hot-dip galvanizing line.

[0002]

2. Description of the Related Art In a continuous hot-dip galvanizing equipment,
The fall of solidified zinc vapor generated in the dross and snout present in the bath causes abnormal surface quality of the strip (steel strip) surface, which is called “dross pulling”. As a countermeasure, various types of snouts have been considered as follows. In order to reduce the amount of generated zinc evaporate, a shield will be installed on the bath surface in the snout. The evaporated zinc vapor is discharged and removed from the snout as a gas by a pump or the like. A shield is provided to prevent dross generated in the zinc pot from being caught in the strip, and the dross is discharged out of the pot.

[0003]

However, none of the methods has been satisfactory. The present invention solves the above-mentioned problems, and the zinc evaporated from the surface of the galvanizing bath is solidified again, and the solidified material (ash) falls again on the bath surface and is caught in the strip, thereby causing a surface called dross pulling. An object of the present invention is to provide a snout apparatus for a continuous hot-dip galvanizing line that prevents quality abnormalities.

[0004]

Means for Solving the Problems To solve the above problems, the configuration of the present invention is as follows. That is, on the inner wall of the snout above the zinc bath surface, an ash receiver having a horizontal portion or an inclined portion close to the horizontal portion is provided so as to receive the ash, and a suction pipe opened toward the bath surface in the snout is provided with a zinc bath. It was led out of the bathtub through the inside, a transportation pump was connected to the end of the pipe, and an inert gas pipe and a nozzle for blowing ash were provided on the snout inner wall above the ash receiver. is there.

[0005]

Embodiments of the present invention will be described below based on one embodiment shown in the drawings. In FIGS. 1 and 2, the strip A inclines into the zinc bath surface, advances downward, and surrounds it to form a snout 1 having a rectangular cross-section cylindrical body.
However, it similarly inclines and penetrates into the bath from across the bath surface from above. The part immersed in the bath is made of stainless steel. Then, on the inner wall of the snout 1, a part of the inclined wall below the strip A is bent to form the ash receiver 2 which becomes the inner wall step 2a. The snout side wall is also provided with an ash receiver composed of a horizontal shelf 2b. The inner wall receiving portion 2a and the shelf 2b are 100
mm or more. A transport pump is installed outside the snout 1 and a suction pipe 3a connected thereto is provided.
And the discharge pipe 3b is installed in the snout, the upper end thereof opens near the bath surface, and the flow of zinc from the discharge pipe 3b to the suction pipe 3a occurs. Further, a nitrogen gas pipe 4 and a spray nozzle 5 are installed above the ash receiver 2 in the snout.
Turned to

As described above, the ash falling from the upper part of the snout accumulates in the ash receiver 2 and is prevented from falling on the bath surface. The ash that has fallen on the zinc bath surface is discharged out of the snout through the suction pipe 3a by the transport pump. The ash deposited on the ash receiver 2 is blown off to the bath surface by the spray nozzle 5 when the operation is stopped (repair period), and the transport pump discharges the ash out of the snout 1.

The present invention is not limited to the examples and embodiments described above, but includes various modifications without departing from the spirit and scope of the appended claims.

[0008]

EFFECTS OF THE INVENTION According to the present invention, the amount of re-evaporated zinc in the snout is reduced, thereby reducing the abnormal skin surface of the strip due to dross.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of one embodiment of the present invention.

FIG. 2 is a plan view of FIG.

[Explanation of symbols]

 A strip 1 snout 2 ash receiver 2a inner wall step 2b shelf 3a suction pipe 3b discharge pipe 4 inert gas pipe 5 nozzle

Claims (1)

[Claims] 1. A suction pipe having a horizontal portion or an inclined portion near the ash receiving surface is provided on the inner wall of the snout above the zinc bath surface, and the suction pipe is open to the bath surface in the snout. Is led out of the bathtub through a zinc bath, a transport pump is connected to the end of the suction pipe, and an inert gas pipe and a nozzle for blowing ash are provided on the snout inner wall above the ash receiver. A snout apparatus for a continuous hot-dip galvanizing line.