JPH0578874A - Ultrasonic pickling device - Google Patents

Abstract

PURPOSE:To reduce the equipment cost by arranging an ultrasonic irradiation device confronted with the specified length of the full length of the metallic strip traveling passage in a tank. CONSTITUTION:A pickling liq. L in a tank 1 is irradiated with an ultrasonic wave from an ultrasonic irradiation device 10. A metallic strip S is traveled through the liq. L and pickled. Th device 10 is confronted with the length of the strip S traveling passage of <= about 1/4 of the full length in the tank 1. The running cost is remarkably reduced in this way.

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 a metal strip by running it 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 strip steel, an ultrasonic pickling apparatus has been developed for irradiating ultrasonic waves in a pickling solution to improve its pickling effect. Are known.

[0003] This device is provided from above the strip steel running over the entire length of the strip running path in the pickling solution filled in the tank.
Ultrasonic waves are radiated by an ultrasonic wave irradiation device arranged in contact with the pickling solution to promote the pickling.

[0004]

By the way, in the conventional apparatus as described above, the ultrasonic irradiation apparatus is installed over the entire length of the traveling path of the material to be pickled in the tank, so that the equipment cost is high. However, there is a problem that a large amount of energy is required to oscillate ultrasonic waves.

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

[0006]

In order to achieve the above-mentioned object, an ultrasonic pickling apparatus of the present invention irradiates ultrasonic waves into a pickling solution filled in a tank, and a metal strip is applied to the pickling solution. In the pickling device that travels the material and performs pickling treatment, the ultrasonic irradiation device is exposed to the running path only in the range of about 1/4 of the total length of the running path of the metal strip in the tank. It is characterized by being arranged.

[0007]

The above-mentioned ultrasonic pickling apparatus of the present invention uses the pickling solution from the ultrasonic irradiation apparatus installed over 1/4 of the entire length of the metal strip running on the running path in the tank. The metal strip is irradiated with ultrasonic waves to promote 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 time. In the present invention, the ultrasonic wave irradiation device is used to measure the total length of the running path of the metal strip.
By arranging in the range of 1/4 length, the pickling time of the metal strip is not much different from the ultrasonic irradiation device installed over the entire length of the running path, so the equipment cost and running cost are significantly reduced. It saves money.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a vertical sectional view of an ultrasonic pickling apparatus in which an ultrasonic irradiation apparatus is installed in a jet pickling tank, and FIG. 2 is II of FIG.
-II sectional drawing, FIG.3 and FIG.4 is each explanatory drawing which shows the result of the experiment of this invention.

In FIGS. 1 and 2, 1 is a tank,
A skid 3 is lined up on the bottom surface of the tank, and the inside of the tank covered with the lid 2 and filled with the pickling solution L is divided by three partitions 4 into a first tank 11, a second tank 12, a third tank 13, and a third tank. It is divided into four tanks 14. The length of each section is set to about 1/4 of the total running path of the steel strip S.

The lid 2 of the second tank 12 is provided with a cover 7, an oscillating plate 8 and a large number of oscillators 9.
0 is set.

Reference numeral 5 denotes a nozzle header for injecting the pickling solution L,
It is arranged on the front and rear sides in the longitudinal direction of the tank 1, 21 is a drain port provided in the side portion in the running direction of the steel strip, 22 is a drain passage communicating with this, 23 is a drain receiver, and 24 is a drain pipe. Is.

Next, the operation of this apparatus will be described. The first tank 11, the second tank 12, which is filled with the pickling solution L and is jetted,
The steel strip S is run in the third tank 13 and the fourth tank 14 for pickling, and the steel strip S passing through the second tank 12 is ultrasonically fed from the ultrasonic wave irradiating device 10 at the partition site. To accelerate pickling.

FIG. 3 is an explanatory diagram showing the relationship between the time when 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 to be immersed in the pickling solution). It is shown that when the ultrasonic irradiation time exceeds 8 seconds, the pickling required time is hardly shortened even if the ultrasonic irradiation time increases.

Further, FIG. 4 shows the first tank 11, the second tank 12,
An explanation will be given of experimental results regarding the influence on the pickling time depending on the timing of irradiating the steel strips in the tanks with ultrasonic waves by disposing the ultrasonic wave irradiation devices 10 separately in the third tank 13 and the fourth tank 14, respectively. It was found from the figure that the pickling time can be most shortened by disposing the ultrasonic irradiation device in the second tank 12 or the third tank 13.

In the above embodiment, the ultrasonic wave irradiation device 10 is used.
Although it is arranged in the second tank 12, it may be arranged in the third tank 13 or may be arranged so as to straddle the second tank 12 and the third tank 13. Further, due to the configurational convenience of the apparatus, even if the ultrasonic irradiation apparatus 10 is arranged in the first tank 11 or the fourth tank 14, as shown in FIG. 4, there is no significant difference in the pickling time of the steel strip S. 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 the range of about 1/4 of the running path of the metal strip. By arranging it facing the running path, the pickling time of the metal strip is not much different from the conventional equipment equipped with ultrasonic irradiation equipment over the entire length of the running path, so its equipment cost and running The cost can be significantly reduced.

[Brief description of drawings]

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

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

FIG. 3 is an explanatory diagram showing the relationship between the time during which the steel strip is exposed to ultrasonic waves and the time required for pickling in the present invention.

FIG. 4 is an explanatory view of the influence of ultrasonic wave irradiation timing on pickling time in the present invention.

[Explanation of symbols]

 1 Tank 2 Lid 3 Skid 4 Partition 5 Nozzle Header 8 Oscillator 9 Oscillator 10 Ultrasonic Irradiator 11 1st Tank 12 2nd Tank 13 3rd Tank 14 4th Tank 21 Drainage Port 22 Drainage L Pickling Solution S band steel

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Keiji Tanizaki 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima City Mitsubishi Heavy Industries, Ltd. Hiroshima Research Laboratory (72) Inventor Saka Adult 6-22 Kannon Shinmachi, Nishi-ku, Hiroshima No. Mitsubishi Heavy Industries, Ltd. Hiroshima Works (72) Inventor Naoyuki Nagai 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima City Mitsubishi Heavy Industries, Ltd. Hiroshima Research Institute (72) Inventor Etsushi Hino 1-chome, Mizushima Kawasaki, Kurashiki, Okayama ( Kawasaki Steel Co., Ltd. Mizushima Steel Works (72) Inventor Toko Teshiba Mizushima Kawasaki-dori, 1-chome, Kurashiki City, Okayama Prefecture (no house) Kawasaki Steel Co., Ltd. Mizushima Steel Works (72) Inventor Kakuda Hiroshi Mizushima Kurashiki City, Okayama Prefecture Kawasaki Dori 1-chome (no house number) Kawasaki Steel Co., Ltd. Mizushima Steel Works (72) Inventor Susanuma Nanao, Kurashiki City, Okayama Prefecture Shimakawasaki Dori 1-chome (no address) Mizushima Steel Works, Kawasaki Steel Co., Ltd. (72) Inventor Koichi Hirase Mizushima Kawasaki Dori 1-chome, Kurashiki City, Okayama Prefecture (no address) Kawasaki Steel Co., Ltd. Mizushima Works

Claims (1)

[Claims] 1. A pickling apparatus for irradiating an ultrasonic wave into a pickling solution filled in a tank to cause a pickling treatment by running a metal band in the pickling solution, wherein the pickling solution is in the tank. The ultrasonic pickling device is characterized in that the ultrasonic irradiation device is arranged so as to face the traveling path of only about 1/4 of the entire length of the traveling path.