KR101631029B1 - Descaler - Google Patents

Descaler Download PDF

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Publication number
KR101631029B1
KR101631029B1 KR1020150086060A KR20150086060A KR101631029B1 KR 101631029 B1 KR101631029 B1 KR 101631029B1 KR 1020150086060 A KR1020150086060 A KR 1020150086060A KR 20150086060 A KR20150086060 A KR 20150086060A KR 101631029 B1 KR101631029 B1 KR 101631029B1
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KR
South Korea
Prior art keywords
pressure water
scale
removal unit
rolled material
high pressure
Prior art date
Application number
KR1020150086060A
Other languages
Korean (ko)
Inventor
정종서
Original Assignee
주식회사 포스코
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Publication date
Application filed by 주식회사 포스코 filed Critical 주식회사 포스코
Priority to KR1020150086060A priority Critical patent/KR101631029B1/en
Application granted granted Critical
Publication of KR101631029B1 publication Critical patent/KR101631029B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
    • B21B45/08—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing hydraulically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0233—Spray nozzles, Nozzle headers; Spray systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0269—Cleaning
    • B21B45/0275—Cleaning devices
    • B21B45/0278—Cleaning devices removing liquids

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Abstract

An embodiment of the present invention is to improve a prevention of backflow of water containing scale to a surface of a rolled object, and the regeneration of scale by lowering a surface temperature of the rolled object. According to an aspect of the present invention, a scale removing device comprises: a scale removing unit formed on a front side of a rolling roll, jetting high-pressure water to remove scale on a surface of a rolled object; a high-pressure water removing unit mechanically gathering a high-pressure water jet by the scale removing unit; a dual-injection nozzle header formed on a rear side of the high-pressure water removing unit, preventing an overflow of the high-pressure water passing through the high-pressure water removing unit by jetting high-pressure water to the high-pressure water removing unit, and jetting cooling water to cool the rolled object to the rolled roll.

Description

Scale removal device {DESCALER}

The present invention relates to a descale apparatus used in a rolling mill.

Generally, the rolling process is a process of manufacturing a slab in the form of a coil. In the heating furnace of the rolling process, the slab can be preheated and heated. When the slab is heated in the furnace, a scale may be generated on the surface of the slab. Also, scale is generated as the slab discharged from the heating furnace is exposed to the atmosphere while being conveyed to the rolling mill.

Therefore, a scale removing device for removing the scale generated in the slab is installed in the step before the process is put into the rolling mill. The scale removing device removes the scale formed on the surface of the slab by injecting the high-pressure fluid.

On the other hand, in the case of a mini mill of conventional rolling mills, a scale removing apparatus is installed just before the mill to minimize the size of the mill.

However, in the conventional scale removing apparatus, the sprayed water that has been sprayed for removing the scale is left on the surface of the rolled material that is going to coexist in the process of removing the scale to the high-pressure sprayed water, As a result, when the scale is countercurrently flowed with the retentate to reach the surface moving in the direction of the rolling mill, the surface of the rolled product may be scaled and adversely affect the surface quality, which also affects the surface quality of the downstream process.

In addition, the rolled product having passed through the descale device forms a high-temperature scale in a section where the surface is repaired and impinges on the rolling mill.

Korean Patent Application No. 2012-0044185 Korean Patent Application No. 1996-0032680 Japanese Patent Application No. 2000-316135

An embodiment of the present invention aims to prevent reverse flow of scale water including the scale on the surface of the rolled material, and to reduce the surface temperature of the rolled material to thereby prevent regeneration of the scale.

A descale apparatus according to one aspect of the present invention is provided at the front of a rolling roll to dispense high pressure water for descaling of a surface of a rolled material; A high pressure water removal unit provided to mechanically remove high pressure water sprayed by the scale removal unit; And a high-pressure water removal unit that is provided behind the high-pressure water removal unit and injects high-pressure water in the high-pressure water removal rejection direction to block the overflow of high-pressure water that has passed through the high-pressure water removal unit, Wherein the double jet nozzle head is provided with a widthwise central portion in the traveling direction of the rolled material protruding in a direction opposite to the traveling direction of the rolled material and being inclined.
According to another aspect of the present invention, there is provided a scale removing apparatus, which is provided in front of a rolling roll, for spraying high-pressure water for scaling off a surface of a rolled product; A high pressure water removal unit provided to mechanically remove high pressure water sprayed by the scale removal unit; And a high-pressure water removal unit that is provided behind the high-pressure water removal unit and injects high-pressure water in the high-pressure water removal rejection direction to block the overflow of high-pressure water that has passed through the high-pressure water removal unit, Wherein the double jet nozzle headers are inclined obliquely overall in the width direction of the running direction of the rolled material.

The high pressure water eliminating portion is provided in front of the scale removing portion to guide and discharge the flow of the high pressure water sprayed into the rolled product, and a guide portion provided behind the scale removing portion to rotate And an outgoing dam roller for blocking high pressure water flowing backward.

The high pressure water removing unit is provided at the front of the scale removing unit to block the overflow of the high pressure water that is rotated and rotated along the rolled material and is provided at the rear of the scale removing unit, And an outflow dam roller for blocking the high pressure water flowing back and forth.

The double jet nozzle head may further include a first nozzle which is inclined at a first inclination angle with respect to a direction opposite to the advancing direction of the rolling roll and which ejects high pressure water, and a second nozzle which is inclined at a second inclination angle with respect to the advancing direction of the rolling roll, And a second nozzle for spraying in the form of a spray.

Here, the first nozzle may be inclined by 15 to 30 degrees with respect to a direction opposite to the traveling direction of the rolling roll.

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According to one embodiment of the present invention, since the structure and operation are simple and can be installed in a narrow space, operation is performed by one header, so that maintenance and maintenance can be simplified, The surface quality of the rolled product can be stably ensured.

1 is a front view of a descale apparatus according to an embodiment of the present invention;
2 is a plan view of a descale apparatus according to an embodiment of the present invention;
FIG. 3 is an enlarged front view of a dual jet nozzle head of a descale apparatus according to an embodiment of the present invention; FIG.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. The shape and the size of the elements in the drawings may be exaggerated for clarity and the same elements are denoted by the same reference numerals in the drawings.

FIG. 1 is a front view of a descale apparatus according to an embodiment of the present invention, and FIG. 2 is a plan view of a descale apparatus according to an embodiment of the present invention. 3 is an enlarged front view of a dual jet nozzle head of the descale apparatus according to an embodiment of the present invention.

Referring to Figs. 1 to 3, the descale removing apparatus 100 of the present embodiment is a device for removing scale formed on the surface of the rolled product 10 to be fed in the rolling process.

In the rolling process, the furnace is fed with the preheated and heated slabs, and the heated slab passes through between the rolling rolls and can be processed to a desired thickness.

In the rolling process, the slab may be scaled on the surface in the process of being heated and moving from the heating furnace to pass through the rolling roll.

The descaling apparatus 100 can remove the scale formed on the surface of the rolled product 10 before the rolled product 10 enters the rolling roll 50. [

To this end, the descaling apparatus 100 may be provided in front of the rolling roll 50 and may include a scale removing unit 110 for spraying high pressure water for descaling of the surface of the rolled product 10.

When the high pressure water is injected onto the surface of the rolled product 10, the scale removal unit 110 rapidly quenches the surface of the rolled product 10, destroys the crystal structure, removes scale, Can be separated from the surface of the water (10).

On the other hand, the high pressure water injected from the scale removing unit 110 is pushed forward with the scale separated from the rolled product 10, that is, in the direction opposite to the traveling direction of the rolled product 10, In the direction of travel of the vehicle.

As described above, the descale removing apparatus 100 of the present embodiment may include a high pressure water eliminating portion provided to mechanically scrape off the high pressure water to prevent the high pressure water sprayed by the scale removing portion 110 from overflowing.

In one example, the high pressure water removal unit 120 may include a guide unit 122 provided in front of the scale removal unit 110.

The guide part 122 can guide and discharge the flow of the high pressure water pushed toward the front side, that is, the direction opposite to the traveling direction of the rolled product 10, after being sprayed on the rolled product 10 from the scale removing part 110. The guide portion 122 may guide the high pressure water to the side of the rolled product 10 and may be provided in a curled shape upward and separated into the curled guide portion 122 by the high pressure water injection pressure, It is also possible to provide it.

The high pressure water sprayed from the scale removing unit 110 may flow together with the rolled product 10 or part of the process of separating the guide unit 122 may flow backward along the rolled product 10.

Therefore, an outward dam roller 124 for preventing the backward flow of the injected high pressure water can be provided at the rear of the scale removal unit 110. [

The exit dam roller 124 is provided so as to be able to rotate along the rolled material 10 at the back of the scale removing unit 110 and the water such as high pressure water that is flowing backward is blocked by the exit dam roller 124, Can be blocked.

On the other hand, the configuration of the high-pressure water removal unit 120 can be variously modified.

For example, in the present embodiment, the high pressure water removal unit 120 is described as being provided with the inlet side dam roller 126 in front of the scale removal unit 110. However, in the front side of the scale removal unit 110, It is also possible to block the overflow of water such as high-pressure water.

The inlet side dam rollers 126 are provided to rotate along the rolled product 10 in front of the scale removal unit 110 and can be provided with diameters such that the injected high pressure water does not exceed. In addition, although the input side dam roller 126 includes one roll member, it is also possible to vertically stack a plurality of roll members on the upper side of the input side dam roller 126.

In this embodiment, the high-pressure water removal unit 120 may have different configurations of the upper and lower portions of the rolled product 10.

For example, in the high-pressure water removal unit 120, the guide part 122 and the outward-side dam roller 124 may be installed on the upper part of the rolled product 10 to block the overflow of the residual water, It is also possible to provide the inlet side dam roller 126 and the outlet side dam roller 128 to block the flow of the staying water.

In addition, the descale apparatus 100 of the present embodiment may include a double jet nozzle header 130 provided behind the high pressure water removal unit 120.

The double jet nozzle headers 130 are provided in a structure capable of jetting in both directions. Specifically, the double jet nozzle headers 130 are disposed in the high pressure water removal unit 120 in such a manner that the high pressure water, And at the same time, the surface of the rolled product 10 can be cooled by spraying the cooling water in the direction of the rolling roll 50.

The double jet nozzle header 130 includes a first nozzle 132 which is inclined at a first inclination angle a1 with respect to a direction opposite to the advancing direction of the rolling roll 50 and ejects high pressure water, And a second nozzle which is inclined at a second inclination angle a2 with respect to the direction to spray the cooling water onto the surface of the rolled product 10. [

At this time, the first nozzle 132 may inject high pressure water in a state in which the first nozzle 132 is inclined by 15 to 30 degrees with respect to the direction in which the rolling roll 50 advances. When the first nozzle 132 is inclined to less than 15 degrees with respect to the reverse direction of the traveling direction, the high-pressure water jetted from the first nozzle 132 stays and passes through the high-pressure water removal unit 120, can do. When the first nozzle 132 is inclined at an angle of 30 degrees or more with respect to the direction opposite to the traveling direction, the distance of the high pressure water sprayed from the first nozzle 132 and touching the surface of the rolled product 10 is increased. As the length increases, the injection pressure of the high-pressure water becomes low, so that the staying water can not be properly removed.

Further, the second nozzle 134 can spray the cooling water in a spray form in the direction of the rolling roll 50. The angle at which the second nozzle 134 injects the cooling water is not particularly limited, but may be an angle at which the cooling water is injected at various angles to spray the cooling water so that the entire cooling can be uniformly performed before the rolling product 10 enters the rolling roll 50 Lt; / RTI >

The cooling water injected from the second nozzle 134 can reduce the surface temperature of the rolled product 10 and prevent the scale from being regenerated.

In the meantime, in the present embodiment, the double jet nozzle header 130 is provided in such a manner that the widthwise central portion in the traveling direction of the rolled product 10 protrudes in the direction opposite to the traveling direction of the rolled product 10 and is inclined at the third inclination angle a3 .

That is, the double jet nozzle headers 130 are protruded forward in the width direction center, that is, in the direction opposite to the advancing direction of the rolled product 10, and both side portions can be provided in a staggered form.

Accordingly, the high-pressure water jetted from the first nozzle 132 can be injected obliquely in a manner staggered toward both side portions with respect to the center in the width direction, So that the accumulated water moved from the front is moved from the center in the width direction to the both side portions and is easily discharged, so that the overflow of the staying water can be easily blocked.

As described above, in the present embodiment, the double jet nozzle headers 130 are formed to be inclined to both sides with respect to the center portion, thereby minimizing the distance traveled by the staying water, and thus, are advantageous for discharging the staying water.

In the meantime, although the dual injection type nozzle headers 130 are formed so as to be inclined at both sides of the center portion, the shape of the dual injection type nozzle headers 130 is not limited to the present embodiment.

For example, the double jet nozzle header 130 may be provided in an oblique direction as a whole with respect to the width direction of the traveling direction of the rolled product 10. [

As described above, the double jet nozzle header 130 is provided in an oblique direction as a whole with respect to the width direction, so that the stagnant water can be easily discharged. However, as the distance of discharging the stagnant water increases, Although the efficiency may be lowered somewhat, it is of course possible to improve the discharge efficiency of the staying water as compared with the case of being arranged in a horizontal state.

Meanwhile, the double jet nozzle headers 130 may be formed in a straight shape, which may be advantageous in terms of manufacturing cost, management cost, equipment installation, and the like.

In addition, the double jet nozzle header 130 can reduce the angle of the nozzle of the protruding portion toward the rolled product 10 and increase the angle toward the rolled product 10 toward the side portion, It is also possible to regulate the discharge efficiency of the residual water through the circulating water.

That is, in the double jet nozzle header 130, the projected portion injects high pressure water at an angle close to 15 degrees in the direction opposite to the advancing direction with respect to the rolled material 10, and at the inclined end side, It is also possible to spray the high-pressure water at an angle close to 30 degrees in the reverse direction of the traveling direction.

The double jet nozzle head 130 having such a structure can strongly block the passage of the staying water at the protruding portion and the angle at which the staying water is injected is lowered instead of directly blocking the passage of the staying water toward the inclined end, It is possible to increase the mobility of the water and to give an acceleration force so that the water flow can easily flow to the side.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents. It will be clear to those who have knowledge.

10: Rolled water 50: Rolled roll
100: scale removing device 110: scale removing device
120: High pressure water decontamination 122: Guide part
124: Exit dam roller 130: Double injection nozzle header
132: first nozzle 134: second nozzle

Claims (7)

A scale remover provided in front of the rolling roll to eject high pressure water for descaling of the surface of the rolled material; A high pressure water removal unit provided to mechanically remove high pressure water sprayed by the scale removal unit; And a high-pressure water removal unit that is provided behind the high-pressure water removal unit and injects high-pressure water in the high-pressure water removal rejection direction to block the overflow of high-pressure water that has passed through the high-pressure water removal unit, Jet nozzle head,
Wherein the double jet nozzle head is provided with an inclined central portion in the width direction of the traveling direction of the rolled material protruding in a direction opposite to the traveling direction of the rolled material. A scale remover provided in front of the rolling roll to eject high pressure water for descaling of the surface of the rolled material; A high pressure water removal unit provided to mechanically remove high pressure water sprayed by the scale removal unit; And a high-pressure water removal unit that is provided behind the high-pressure water removal unit and injects high-pressure water in the high-pressure water removal rejection direction to block the overflow of high-pressure water that has passed through the high-pressure water removal unit, Jet nozzle head,
Wherein the double jet nozzle head is provided obliquely in an oblique direction as a whole with respect to the width direction of the traveling direction of the rolled material. The apparatus as claimed in claim 1 or 2, wherein the high-
A guiding part provided in front of the scale removing part for guiding and discharging the flow of the high-pressure water sprayed to the rolled product,
And an output dam roller provided behind the scale removing unit to block high pressure water flowing back and rotating along the rolled material. The apparatus as claimed in claim 1 or 2, wherein the high-
An inlet side dam roller which is provided in front of the scale removing unit and blocks the overflow of high pressure water which is rotated and injected along the rolled material,
And an output dam roller provided behind the scale removing unit to block high pressure water flowing back and rotating along the rolled material. The nozzle head according to claim 1 or 2, wherein the double jet nozzle head
A first nozzle which is inclined at a first inclination angle with respect to a direction opposite to the advancing direction of the rolling roll,
And a second nozzle which is inclined at a second inclination angle with respect to a moving direction of the rolling roll to eject cooling water in a spray form. The method of claim 5,
Wherein the first nozzle is inclined by 15 to 30 degrees with respect to a direction opposite to a traveling direction of the rolling roll. delete
KR1020150086060A 2015-06-17 2015-06-17 Descaler KR101631029B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190136800A (en) * 2018-05-31 2019-12-10 주식회사 포스코 Device for preventing interference between descaler rows of finishing scale breaker using counter water jet

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR960032680A (en) 1995-02-10 1996-09-17 문정환 Manufacturing Method of Semiconductor Device
JP2000316135A (en) 1999-05-06 2000-11-14 Matsushita Electric Ind Co Ltd Copy preventing device
JP3422671B2 (en) * 1997-12-05 2003-06-30 三菱重工業株式会社 Method and apparatus for suppressing scale flaw generation during hot finish rolling
JP3844279B2 (en) * 2000-10-17 2006-11-08 新日本製鐵株式会社 Descaling apparatus and method
JP4370996B2 (en) * 2004-07-28 2009-11-25 Ｊｆｅスチール株式会社 Descaling method and descaling equipment in hot rolling
KR20120044185A (en) 2010-10-27 2012-05-07 현대제철 주식회사 Apparatus for removing remained water from hot coil

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR960032680A (en) 1995-02-10 1996-09-17 문정환 Manufacturing Method of Semiconductor Device
JP3422671B2 (en) * 1997-12-05 2003-06-30 三菱重工業株式会社 Method and apparatus for suppressing scale flaw generation during hot finish rolling
JP2000316135A (en) 1999-05-06 2000-11-14 Matsushita Electric Ind Co Ltd Copy preventing device
JP3844279B2 (en) * 2000-10-17 2006-11-08 新日本製鐵株式会社 Descaling apparatus and method
JP4370996B2 (en) * 2004-07-28 2009-11-25 Ｊｆｅスチール株式会社 Descaling method and descaling equipment in hot rolling
KR20120044185A (en) 2010-10-27 2012-05-07 현대제철 주식회사 Apparatus for removing remained water from hot coil

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190136800A (en) * 2018-05-31 2019-12-10 주식회사 포스코 Device for preventing interference between descaler rows of finishing scale breaker using counter water jet
KR102174987B1 (en) * 2018-05-31 2020-11-05 주식회사 포스코 Device for preventing interference between descaler rows of finishing scale breaker using counter water jet

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