JPS5933024A - Device for removing scale of steel hoop - Google Patents

Abstract

PURPOSE:To remove scales of a steel hoop at a high efficiency, by removing scales exfoliated from a hoop in the course of bending deformation of a hot rolled hoop by means of a magnetic force. CONSTITUTION:A steel hoop 1 which is sent into a mechanical descaling device 20 after inlet side facilities 10, receives bending deformation from bending rolls 22 and scales produced by cracks and divided into cracked pieces come out from the steel hoop 1. The cracked pieces are removed from the surface of the steel hoop 1 by the magnetic force of a magnet roll 23 and attracted to a belt 25, and then, carried away by the rotation of a pulley 24. Then, the scales are attracted to a magnet separator roll 26 and scraped off into a tray 28 by a scraper 27, and then, collected into a tray pit 29 by means of a water current. The steel hoop 1 which has passed through the device 20 is further subjected to a descaling process at a chemical descaling device 30 and sent out to outlet side facilities 40.

Description

[Detailed Description of the Invention] The present invention relates to a hot-rolled copper strip (hereinafter referred to as a hot-rolled steel strip).
Only regarding equipment for removing scale from hot-rolled copper strips is
A thin iron oxide film, □ that is, scale, is formed on the surface, but when this copper strip is cold-rolled into polished strip steel, it is necessary to remove the scale formed on the surface of the copper strip. A process for removing scale (hereinafter referred to as descaling process) is performed.

As this descaling treatment, the chemical method (hereinafter referred to as the chemical method), which dissolves the scale by soaking it in a chemical acid such as hydrochloric acid or sulfuric acid, is generally known. In addition, in recent years, mechanical descaling method (hereinafter referred to as mechanical descaling method) has been introduced.
The defecation kale treatment is carried out by using both methods in combination. ′
□ - Rikkyo Kardesu - The equipment used in the ring method is a wet shot press that sprays high-pressure water and abrasive material, a ``tegishi false level'' that uses a ``pressure pump'', a ``Gi no Tsukuda brush roll'', and a ``kanobu machine''. Although it is well known, at present, each MA-m alone is used for '
Guanquan--Stahl's slow release system has not yet been fully developed. □ Type 1 Removal: The ninth k, which uses the blast method to completely remove scale, consumes a huge amount of power, and is a cost-effective option. Therefore, □To reduce the cost of a run-like jig, JP-A-562'86':=
As seen in No. 62, a telerayon roller is installed on the inlet side of the equipment, and a plush roll is installed on the exit side of the equipment as seen in Shikukai No. 54-50437.
1. It is necessary to install a pickling tank to perform chemical descaling treatment on the bending side.Other methods include combinations of tension repeller and pickling tank, rolling mill and pickling tank, etc. Unfortunately, chemical descaling is now performed after Kering 1. However, several problems arise, and it is not recommended as a scale treatment method. ``I should be satisfied, but it's not □.''

FIGS. 1 and 2 show an example of a conventional thermal steel strip scale removal apparatus, which includes an inlet equipment 10, a mechanical descaling apparatus 20, a chemical descaling apparatus 30, and an outlet equipment 10, a mechanical descaling apparatus 20, a chemical descaling apparatus 30, The steel strip 1 is descaled from the input equipment 10 by a mechanical descaling device 20, then further descaled by a chemical descaling device 30, and sent out from the exit equipment 40. . A combination system of a tension leveler or a rolling mill and the pickling tank 31 is used to prevent kale from flowing into the pickling tank 31 after it has been floated and peeled off by the tension leveler or rolling mill. It is necessary to install Bratu/Yupnir 2.

However, this plush roll 2 caused linear grooves and unevenness to be formed on the surface of the chi band, resulting in poor surface use.
6. The grinding binder used in the plush roll 2 falls off and flows into the pickling tank 31 (112), which becomes spray and deposits in the tank.6. ．． 5<, 9. =・7
ke"-2,4t"J-46,.

As this will destroy the tension repeller and the rolling mill head and accelerate wear, spray coolant such as water from the rudder 3 onto the surface of the guide roll 21 and #1 roll 1, as shown in Figure 2. This spraying prevents damage to the surface of the copper strip 10 and abrasion of the guide roll 21. However, as an energy saving measure in chemical descaling, when the heat possessed by the hot rolled steel strip is used to reduce the heating energy by steam to the pickling tank 31, the guide roll 2J and The steel strip 1 is cooled by the water sprayed onto the surface of the steel strip 1, and the large amount of heat held by the steel strip 1 cannot be carried into the pickling tank 31, making it impossible to achieve energy savings. Also, the steel strip 1 has a water basin attached to its surface.
As the steel strip passes through the pickling tank 31, the acid concentration decreases, and as the acid concentration decreases, the scale dissolution rate is delayed, so it became necessary to adjust the feeding speed of the steel strip 1. It has disadvantages such as increase in

The present invention was created in view of these drawbacks and is a highly efficient descaling device for hot rolled steel strips! The purpose is to provide .

According to the present invention, in a descaling device for continuously feeding and descaling a hot-rolled copper strip, there are provided a bending deformation imparting means for bending the fed steel strip; A steel strip scale removal device is provided, characterized in that it is equipped with a mechanical descaling device comprising a removal means for removing scale that has cracked and peeled off from the steel strip due to this bending deformation from the copper strip, This configuration achieves the above object.

Next, an embodiment of the hot rolled steel strip scale removing apparatus according to the present invention will be described.

FIGS. 3 and 4 are diagrams showing an embodiment of the hot-rolled steel strip scale removal apparatus according to the present invention.dThe hot-rolled steel strip scale removal apparatus according to the present invention is as shown in FIG. Similar to the conventional scale removal apparatus, it is composed of an inlet side equipment 10, a mechanical descaling apparatus 20, a chemical descaling apparatus 30, and an outlet side equipment 4.0.

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The entrance equipment 10 includes an uncoiler 11 that unwinds the steel strip 1 flat, a pinterol leveler 12 that flattens the steel strip 1, a shear 13 that cants out defective parts, and a shear 13 that welds the preceding steel strip and the following steel strip. loop car for storing the steel strip 1 so that the steel strip 1 can be continuously fed] 5A, 15B, other steering rolls, 16
．． It is composed of pridle rolls 17 and the like.

Mechanical descaling device #20 includes a guide roll 2J that guides the copper strip 1 and a bending roll that is placed above and below the horizontally fed steel strip 1 and presses it in the vertical direction to give the steel strip 1 a bending deformation. 22, a magnetized magnet roll 23 installed at the rear position of the bending roll 22 (on the right side of the bending roller 22 in FIG. 4), and a magnet roll 23 installed between the magnet roll 23 and the pulley 24. A belt 25 that contacts or adsorbs scale pieces by contacting the surface of the belt 1 while rotating the belt 1, and a magnetized Th The scraper 27 is comprised of a magnet separator roll 26 and a scraper 27 for peeling off pieces of scale and kale attached to the magnet separator roll 26.

Belt 25 is shown in Figure @5”: Uni, -I1
The face part 25A has a double structure on the front and back, consisting of rubber and the back part 2513 tj steel, and since the inner part is always supplied from the I-magnetized magnet roll 23 to the back part 25B of steel, the steel strip There is no possibility that the scale pieces adsorbed to the belt 25 from the belt 25 will fall during the movement of the belt 25. The magnetic separator roll 26 is strongly magnetized by as much as 7 tons so that it can attract the color scale pieces of the bevel 25'. □: 'The dust in the direction of rotation of the magnet roll 23 is! iii) 11.] is synchronized with the feeding speed in the direction of the arrow in Fig. 4, and the feeding speed of the steel strip 1 is detected by a linear velocity detector (not shown).
The speed control device I' (not shown) allows two connections □
Ronil's 23rd speed is synchronized to the speed of the copper band j□.

In addition, the rotational speed of the magnet roll 23 is adjusted to the feed angle of the steel strip 1 by connecting the roll shafts of the roller 2 and the magnet roll 23 with a mechanical transmission means such as a gear. It's good to have Maruno to tune in to.

A tray 2'8 is sunk in the f direction of the magnetic separator roll 26 to receive the scale pieces scraped off by the scraper 27.
Traypid 2 is carried by the water flowing inside 8.
It accumulates in 9 □ There are sea urchins. ″□ The chemical descaling apparatus 3o is comprised of a pickling tank 31 filled with inorganic acids such as hydrochloric acid and sulfuric acid, and a water washing tank 32 following this pickling 4v!31.

In this chemical descaling equipment 3o, the steel strip 1 is passed through a pickling tank 31 and is treated with acid filled in the tank.

The water washing tank 32 is for washing off the acid adhering to the steel strip 1. : ''11. ll : l
l'. 1 Output side equipment 40 is composed of a steering roll 16, a priddle roll 17, a loop car 150, a side trimmer 41 for cutting the copper strip into a specified width, an oiler 42, a tension reel 43 for winding the steel strip, etc. There is.

Next, the operation of the scale removing device according to this embodiment will be explained.

The 11-inch copper strip sent into the mechanical death 1 ring □ device 20 through the entrance equipment 10 is bent and deformed by the penting roll 22, and the scale formed on the surface of the steel strip 1 cracks. It is divided into many small crack pieces and peels off from the steel strip.

The crack pieces are removed from the surface of the steel strip 1 by the superhuman force of the magnet roll 23 and adsorbed to the belt 25, and are carried to the belt 25 by the rotation of the pulley 24. Then, the mug is adsorbed to the net separator l'ff-ru 26 and scraped off by the scraper 27 into the tray 28.
The water flow in the 8th column causes the 1'' ibbit 291 to be closed.

1-.□ ,... The steel strip 1 that has passed through the mechanical descaling device 20 is further descaled by the chemical descaling device 30, and sent out by the outlet equipment 4o and sent to the next process.

This example is a copper strip scale removal device that combines a mechanical descaling device and a chemical descaling device.
By providing the mechanical descaling device for making the magnetized magnet 23 into the bending roll 22, the following effects are achieved.

(]) Because there is no need to cool the guide roll 21 by jetting water or blow away scale pieces, the steel strip is not cooled.1. More sensible heat is carried into the pickling tank 31 of the steel strip 1, and energy savings can be achieved. By the way, the temperature of the copper strip in conventional examples that used cooling water was 10 to 25.
℃, whereas in this example it is 50 to 80℃.

(2) Since moisture is not brought into the pickling tank 31, the drop in acid concentration is suppressed, the descaling performance is stable, and the amount of waste acid generated is small, so efficiency is improved and the waste acid The load on the collection device can be eliminated.
(3) Since a grinder such as a brushing roll is no longer necessary, equipment costs are reduced, and at the same time, consumables can be removed, resulting in lower running costs.

Although the best embodiment of the present invention has been described below, the present invention is not limited thereto, and various modifications can be made within the scope of the present invention.

Father, Is the mechanical descaling device used in the copper strip descaling device according to the present invention (11) used in a skin bath mill or 1/bet on a processing line for copper strips and steel plates? , &
・It is also possible to remove dust by installing it on the side, which is effective for interstate sanitation.

As is clear from the following explanation, according to the present invention, it is possible to efficiently remove scale from a hot rolled steel strip.

[Brief explanation of the drawing]

Figures 1 and 2 show conventional hot-rolled steel strips.
Figure 3 is a schematic diagram of an apparatus for removing scales from hot-rolled copper strips according to the present invention; Figure 4 is a schematic diagram of essential parts of an embodiment of the present invention; Figure 5 is a partially enlarged view of the vicinity of the magnet roll. DESCRIPTION OF SYMBOLS 1...Steel strip, 10...Inlet equipment, 20...Mechanical f'y-IJ engine, 22...Bending roll, 23...Macnet roll, 25...Bell l -126... Macnet separator roll, 27...
- Scraper, 30... Chemical descaling device, 31... Pickling tank, 40... Outlet equipment. (12)

Claims (1)

[Claims] (1) Heat: The rolled copper strip is continuously sent to a descaling device to descale it, and the sent steel strip is subjected to bending deformation. Shaping method: step This steel strip is characterized by being equipped with a resig device, which uses a magnetic force to remove the skenyl that has been peeled off from the steel strip due to the bending process. Mescale removal device.