JP2961002B2 - Ultrasonic pickling equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for pickling by running a metal strip in a pickling solution under ultrasonic irradiation.

[0002]

2. Description of the Related Art In recent years, for example, in an apparatus for continuously pickling a steel strip, an ultrasonic pickling apparatus has been developed which irradiates ultrasonic waves into a pickling liquid to improve the pickling effect. Are known.

[0003] This apparatus comprises a strip steel running in the pickling liquid filled in a tank and running over the entire length of the strip running path.
Ultrasonic waves are irradiated by an ultrasonic irradiation device arranged in contact with the pickling liquid to accelerate the pickling.

[0004]

However, in the above-mentioned conventional apparatus, since the ultrasonic irradiation apparatus is provided over the entire length of the traveling path of the strip to be pickled in the tank, the equipment cost is high. In addition, there is a problem that a large amount of energy for oscillating the ultrasonic wave is required.

An object of the present invention is to provide a new ultrasonic pickling apparatus which can solve the problems of the conventional apparatus and can reduce the equipment cost and running cost.

[0006]

In order to achieve the above object, an ultrasonic pickling apparatus according to the present invention irradiates an ultrasonic wave into a pickling solution filled in a tank, and a metal strip in the pickling solution. In the pickling apparatus for pickling by moving the material, the tank is moved by the metal strip.
Divided into first to fourth tanks along the row direction,
Metal strip in the second or third tank located at the center
About the total length of the traveling path in the tank within the range of the traveling path of
An ultrasonic irradiation device having a length of 1/4 is provided.

[0007]

The above-mentioned ultrasonic pickling apparatus of the present invention uses an ultrasonic irradiating apparatus installed over one-fourth of the entire length of a metal strip traveling on a traveling path in a tank via an acid pickling liquid. Irradiation of ultrasonic waves to the metal strip promotes pickling of the metal strip.
And, in the pickling of the metal strip, it was found that even if the ultrasonic irradiation time was reduced to about 1/4 of the pickling solution immersion time, there was no significant difference in the pickling required time. In the present invention, the ultrasonic irradiation device is used to reduce the length of the running path of the metal strip to about
By arranging it in a 1/4 length range, the pickling time of the metal strip is not much different from the case where the ultrasonic irradiation device is provided on the entire length of the traveling path, so that the equipment cost and the running cost are significantly reduced. It is a saving.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of an ultrasonic pickling apparatus in which an ultrasonic irradiating apparatus is installed in a jet pickling tank, and FIG. 2 is II in FIG.
-II sectional views, FIGS. 3 and 4 are explanatory diagrams showing the results of the experiment of the present invention.

1 and 2, reference numeral 1 denotes a tank,
On the bottom surface, skids 3 are arranged in a row, and the inside of the tank covered with the lid 2 and filled with the pickling liquid L is partitioned by three partitions 4 into a first tank 11, a second tank 12, a third tank 13, and a It is divided into four tanks 14. The length of each section is set to about 1/4 of the entire running path of the strip S.

The lid 2 of the second tank 12 has an ultrasonic irradiation device 1 comprising a cover 7, an oscillation plate 8 and a number of oscillators 9.
0 is provided.

Reference numeral 5 denotes a nozzle header for injecting the pickling liquid L,
A drain port 21 is provided on the longitudinal side of the tank 1 in the longitudinal direction, 21 is a drain port provided on the side in the strip running direction, 22 is a drain path communicating with the drain port, 23 is a drain receiver, and 24 is a drain pipe. It is.

Next, the operation of the present apparatus will be described. A first tank 11, a second tank 12, which is filled with the pickling liquid L and is jetted;
In the third tank 13 and the fourth tank 14, the strip S is run and pickled, and then the strip S passing through the second tank 12 is ultrasonically irradiated from the ultrasonic irradiation device 10 in the section. Irradiation to accelerate pickling.

FIG. 3 is an explanatory diagram showing the relationship between the time during which the steel strip S is irradiated with ultrasonic waves and the time required for pickling the steel strip S (the time required for the steel strip S to be immersed in the pickling liquid). This indicates that if the irradiation time of the ultrasonic wave exceeds 8 seconds, the time required for pickling is hardly shortened even if the irradiation time becomes long.

FIG. 4 shows a first tank 11, a second tank 12,
Description showing the experimental results on the effect on the pickling time due to the time when the ultrasonic irradiation device 10 is individually arranged in the third tank 13 and the fourth tank 14 and the steel strip in the tank is irradiated with ultrasonic waves. In the figure, it was found that the time for pickling can be shortened most by providing an ultrasonic irradiation device in the second tank 12 or the third tank 13.

In the above embodiment, the ultrasonic irradiation device 10
Is disposed in the second tank 12, but may be disposed in the third tank 13, or may be disposed across the second tank 12 and the third tank 13. Further, even if the ultrasonic irradiation device 10 is disposed in the first tank 11 or the fourth tank 14 due to the configuration of the apparatus, as shown in FIG. Does not occur.

[0016]

As described above in detail, according to the ultrasonic pickling apparatus of the present invention, the ultrasonic irradiation apparatus is limited to only about 1/4 of the length of the traveling path of the metal strip. By arranging it facing the traveling path, the pickling time of the metal strip is not much different from that of the conventional apparatus equipped with an ultrasonic irradiation device over the entire length of the traveling path, so that the equipment cost and running cost are reduced. Costs can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of an ultrasonic pickling apparatus according to one embodiment of the present invention.

FIG. 2 is a sectional front view taken along the line II-II of FIG.

FIG. 3 is an explanatory view showing the relationship between the time during which a steel strip is subjected to ultrasonic irradiation and the time required for pickling in the present invention.

FIG. 4 is an explanatory diagram of the effect of the ultrasonic irradiation timing on the pickling time in the present invention.

[Explanation of symbols]

 Reference Signs List 1 tank 2 lid 3 skid 4 partition 5 nozzle header 8 oscillation plate 9 oscillator 10 ultrasonic irradiation device 11 first tank 12 second tank 13 third tank 14 fourth tank 21 drain port 22 drain path L pickling liquid S band steel

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Sakato Adult 4-2-2 Kanon Shinmachi, Nishi-ku, Hiroshima Sanritsu Heavy Industries, Ltd. Hiroshima Works (72) Inventor Naoyuki Nagai 4-2-2 Kanon Shinmachi, Nishi-ku, Hiroshima City No.3 Mitsubishi Heavy Industries, Ltd.Hiroshima Laboratory (72) Inventor Etsushi Hino 1-chome, Mizushima-Kawasaki-dori, Kurashiki-shi, Okayama Pref. Kawasaki-dori 1-chome (unnumbered) Kawasaki Steel Corporation Mizushima Steel Works (72) Inventor Hiroshi Tsunoda 1-chome, Mizushima-Kawasaki-dori Kurashiki-shi, Okayama Prefecture (unnumbered) Kawasaki Steel Corporation Mizushima Steel Works (72) Inventor Suganuma Shichizumio 1-chome, Mizushima-Kawasaki-dori, Kurashiki-shi, Okayama Prefecture (No address) Kawasaki Steel Corporation Mizushima Works (72) Inventor Koichi Hirase Okayama 1-chome, Mizushima-Kawasaki-dori, Kurashiki-shi, Pref. (No address) Inside the Mizushima Works, Kawasaki Steel Corporation (56) References JP-A-3-53088 (JP, A) JP-A-1-111890 (JP, B2) (58) Surveyed field (Int.Cl. ⁶ , DB name) C23G 3/02

Claims (1)

(57) [Claims] 1. An acid pickling apparatus for irradiating an ultrasonic wave into a pickling liquid filled in a tank and running a metal strip in the pickling liquid to perform pickling treatment . Along the direction of travel
Divided into first to fourth tanks and located at the center of the tank
Of the travel path of the metal strip in the second or third tank
An ultrasonic pickling apparatus characterized in that an ultrasonic irradiation device having a length of about 1/4 of the entire length of the in- tank travel path is provided therein.