JP2000336494A - Device for cleaning metallic band plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the cleaning performance, to shortly suppress the cleaning region and moreover to miniaturize cleaning and discharging equipment by separating dusts from the surface of a band plate by the rotation of brush rolls, blowing off them by a high pressure-high temp. water spray, thereafter applying a spray for rinsing thereon, executing rinsing, removing moisture stuck to the surface by linger rolls and passing the same through a drier. SOLUTION: In a metallic band plate 11 stuck with dusts such as rolling oil, dusts are scraped up by brush rolls 12 rotating in a reverse direction and are separated from the surface. The metallic band plate 11 is progressed to the position of a pressurized and heated water spray 13, and pressurized and heated water is injected to blow off the stuck dusts. Preferably, the spray injection pressure is controlled to >=50 kg/cm2, and the temp. of the injection water to >=45 deg.C. The metallic band plate 11 progresses to the position of a spray 14 for rinsing, the remaining of the dusts is washed away, the surface water is removed by linger rolls 15, and it passes through a drier 16 and is sent out. The cleaning water is subjected to recovering treatment, and the dusts are separated away and reutilized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a process for manufacturing a metal strip, comprising:
The present invention relates to a metal strip cleaning apparatus for removing dust such as metal powder mixed therein.

[0002]

2. Description of the Related Art Conventionally, there has been known a method of using an alkali solution for cleaning a metal strip. For example, as shown in FIG. 3, an alkaline solution is sprayed on a metal strip 1 by a spray 2 and brushed by a roll brush 3 to remove dust.
Further, the remaining water is removed by spraying hot water with a sprayer 4, and the ringer roll 5 is used to remove once the washing water containing an alkaline component on the strip plate surface. After the water is removed at 7, the water is passed through a dryer 8.

There have also been methods of performing alkaline electrolytic cleaning or dipping in an alkaline solution. However, in these methods, since an alkaline solvent is used, the alkali content must be completely removed, and a large amount of washing water is used, so that wastewater treatment is difficult.

[0004] In particular, the fats and oils are dissolved in the washing water by the surfactant effect of the alkaline solvent, and it is extremely difficult to separate and recover the oils and fats. For this reason, the washing water cannot be reused. was there. That is, the entire amount of the washing water had to be treated as industrial wastewater.

[0005] In view of the above, there has been proposed a method in which pressurized and heated water is sprayed onto the surface of the metal strip to wash the metal strip without using an alkali, and the cleaning water is reused. However, this method only sprays pressurized and heated water on the metal strip,
It is not one that separates and removes dust from the surface of the strip, and does not have high cleaning ability. Further, the cleaning ability was changed depending on the roughness of the band plate surface and the shape of the band plate, and stable cleaning could not be expected.

Further, in order to enhance the cleaning ability, it is necessary to arrange the sprays one on top of the other and spray a large amount of pressurized and heated water. For this reason, there is a disadvantage that the washing area, that is, the entire zone for washing becomes long, and a large amount of washing wastewater is treated and reused, so that the processing apparatus becomes large in size.

[0007]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned disadvantages of the conventional type. The cleaning capacity is increased, the cleaning area is shortened, and the cleaning wastewater treatment equipment is reduced in size. An object of the present invention is to obtain a metal strip cleaning apparatus.

[0008]

A brush roll and a high-pressure, high-temperature water spray are provided downstream of the brush roll, and dust is separated from the surface of the metal strip by rotating the brush roll, and is blown off by the high-pressure, high-temperature water spray. I did it. After that, rinsing is performed by spraying with a spray for rinsing, and the water adhering to the surface is removed with a ringer roll, and the water is passed through a dryer.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an overall view showing the outline of the cleaning apparatus of the present invention, and FIG. 2 is a view for explaining the operation of cleaning. In the figure, reference numeral 11 denotes a metal strip, which passes through the washing area from left to right in the figure. Reference numeral 12 denotes a brush roll applied to the upper and lower surfaces of the metal strip 11, which is rotatably supported by an apparatus frame (not shown) and capable of adjusting the vertical roll interval.

Numeral 13 denotes a spray for pressurizing and heating water injection, and 14 denotes a spray for rinsing water injection. These sprays 13 and 14 are vertically movable, that is, with respect to the surface of the metal strip 11. The metal strip 11 is attached to the apparatus frame so that it can be separated from and connected to the metal strip 11 and the injection angle can be adjusted in the direction in which the metal strip 11 advances. The sprays 13 and 14 are arranged in the width direction so as to spray the entire width of the metal strip 11.

[0015] 15 is disposed after the spray 14,
A rotatable, ringer roll supported so as to be adjustable in distance, and rotates in contact with the upper and lower surfaces of the metal strip 11;
Removes water adhering to the strip surface. 16 is a ringer roll 1
5 is a dryer arranged at the subsequent stage, and the metal strip 11
Is dried by the dryer 16 and sent out.

The construction of the present invention is as described above. Next, the action of cleaning will be described. In the manufacturing process, the metal strip 11 having dirt such as rolling oil adhered to the surface thereof is passed through the cleaning area, and the brush roll is rotated in a direction opposite to the direction in which the metal strip 11 passes as shown by the arrow in FIG. At 12, dust is agitated and separated from the surface of the metal strip 11.

At this time, the distance between the upper and lower brush rolls 12 is adjustable, so that the distance between the upper and lower brush rolls 12 can be adjusted according to the thickness of the metal band plate 11 and lightly pressed on the surface of the metal band plate 11. Adjusted. In addition, some of the scraped-up trash may fall there, while others may adhere to the surface of the metal strip in a floating state and proceed.

In this state, the metal strip 11 advances to the position of the pressurized and heated water spray 13,
The heated water is jetted, and the dust attached to the metal strip is blown off in a floating state. As the pressurized and heated water, the spray pressure of the spray is 50 kg / cm ² or more,
Injection water at a temperature of 45 ° C. or higher is used.

FIG. 4 is a graph comparing cleaning effects in cleaning using spray injection. Each graph shows the remaining amount of rolling oil used during rolling by cold rolling an aluminum base material,
Measured immediately after washing and before rinsing. In addition, about 50-200 mg / m < ² > of the rolling oil used at the time of rolling has adhered to the base material surface before rolling and before washing | cleaning.

In the graph, the vertical axis is the amount of residual oil (mg / m ² )
, The horizontal axis represents the temperature (° C.) of the spray water, and as the cleaning method, A was a spray of 50 kg / cm ² , B was a spray of 70 kg / cm ² , and C was a spray. It is a sprayed 70 kg / cm ² spray and then brushed. D is according to the present invention, and is 50 kg / c after dust is lifted by a brush roll.
is obtained by injecting a spray of m ^2, E is also obtained by injecting a spray after 70 kg / cm ² with floating dust in the brush roll.

According to this graph, in the present invention, the spray pressure of the spray is approximately 50 kg / cm ² or more, and the temperature is 45 ° C.
As described above, the residual oil amount is 10 mg / m ² or less, which indicates that the residual oil amount is more effective than other methods. In addition, since the spray 13 can adjust the vertical movement and the injection angle,
It is appropriately adjusted according to the thickness and speed of the metal strip 11 or the type of dust.

Subsequently, the metal strip 11 advances to the position of the spray 14 for rinsing, and the remaining dust is washed away. Here, warming water or normal temperature water is used. Then, in the ringer roll 15, the moisture on the surface of the metal strip 11 is removed, and is sent out through the dryer 16. Although not shown, the washing water is collected. Since the chemical agent is not dissolved, dust can be separated and removed and reused as washing water.

[0019]

According to the present invention, the dust is swept up with a brush roll and separated from the surface of the band plate, and then the dust is blown off by spraying with pressurized and heated water. Heightened. For this reason, it is not necessary to provide the washing water spray in an overlapping manner, and the entire washing area can be shortened. Also, the amount of washing water used was reduced, and the washing wastewater treatment equipment could be downsized.

[Brief description of the drawings]

FIG. 1 is a diagram showing an outline of a cleaning apparatus of the present invention.

FIG. 2 is a diagram showing a cleaning action of the present invention.

FIG. 3 is a diagram showing an outline of a conventional cleaning apparatus.

FIG. 4 is a graph showing a cleaning effect.

[Explanation of symbols]

 1,11 Metal strip 2 Alkali spray 3,12 Brush roll 4,13 Pressurized, heated water spray 5,7,15 Ringer roll 6,14 Rinsing spray 8,16 Dryer

Claims (2)

[Claims] 1. A brush roll is provided, a high-pressure, high-temperature water spray is provided after the brush roll, and a rinsing spray, a ringer roll, and a dryer are provided after the high-pressure, high-temperature water spray. It was separated from the surface of the metal strip by the rotation of the roll, blown off with high-pressure, high-temperature water spray, rinsed with a spray for rinsing, removed the water adhering to the surface with a ringer roll, and passed through a dryer. Characteristic metal strip cleaning equipment. 2. An injection pressure of 50 kg / cm ² or more and a temperature of 45 kg / cm ² or more.
2. The metal strip cleaning apparatus according to claim 1, wherein a high-pressure, high-temperature water spray having a degree of C or more is used.