KR101632735B1 - Apparatus for repairing the cooling pipe of stave blast furnace and this method - Google Patents

Apparatus for repairing the cooling pipe of stave blast furnace and this method Download PDF

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Publication number
KR101632735B1
KR101632735B1 KR1020150063845A KR20150063845A KR101632735B1 KR 101632735 B1 KR101632735 B1 KR 101632735B1 KR 1020150063845 A KR1020150063845 A KR 1020150063845A KR 20150063845 A KR20150063845 A KR 20150063845A KR 101632735 B1 KR101632735 B1 KR 101632735B1
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KR
South Korea
Prior art keywords
cooling pipe
strip
cladding strip
cladding
damaged portion
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KR1020150063845A
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Korean (ko)
Inventor
이도륜
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주식회사 포스코
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Priority to KR1020150063845A priority Critical patent/KR101632735B1/en
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Publication of KR101632735B1 publication Critical patent/KR101632735B1/en

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/10—Cooling; Devices therefor
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/10—Cooling; Devices therefor
    • C21B7/103—Detection of leakages of the cooling liquid
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/24—Test rods or other checking devices

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Abstract

The present invention provides a device to repair a cooling pipe of a stave of a blast furnace, and a repairing method thereof. The device to repair the cooling pipe of the stave of the blast furnace comprises: a cladding strip capable of easily repairing a damaged portion of the cooling pipe without a gas leakage and a cooling water leakage in case of damage to the cooling pipe of the stave equipped in the blast furnace, recovering a cooling function of the stave by forming an arbitrary metal pipe inside the damaged cooling pipe of the stave, and sealing the damaged portion by being supplied to the damaged portion of the cooling pipe in order to reduce a thermal load of the stave itself, improving durability of the stave; a strip feeding unit automatically supplying the cladding strip to the damaged portion of the cooling pipe; a strip winding unit fixating the cladding strip to the damaged portion of the cooling pipe by continuously winding the cladding strip inputted and supplied to the inside of the damaged portion of the cooling pipe; and an input unit connected and installed in a rear side of the strip winding unit, and inputting the strip winding unit to the inside of the damaged cooling pipe. The purpose of the present invention is to provide the device to repair the cooling pipe of the stave of the blast furnace capable of repairing the damaged cooling pipe without a gas leakage and a cooling water leakage by directly supplying the strip to the damaged cooling pipe and sealing the damaged portion.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cooling pipe repair apparatus for a blast furnace,

An apparatus and method for repairing a cooling pipe of a blast furnace are disclosed.

Generally, the blast furnace is charged with iron ore and coke alternately at the upper part and air (hereinafter referred to as hot air) of about 1100 to 1200 ° C is blown through the lower tuyere, and the resulting tuyere Through a hot water discharge port formed in the discharge port.

In the blast furnace operation, the hot air entered into the tuyere reacts with the fuel coke to produce a high temperature of about 2,200 to 2400 ° C, and melts the iron ore as a raw material to produce molten iron using the high heat.

A plurality of stoves having a cooling pipe for circulating and supplying cooling water to the inside of the blast furnace to protect the blast furnace from the high temperature generated in the blast furnace are provided on the inner surface of the blast furnace, Castable) is filled.

The iron ores and coke which are supplied from the upper part of the blast furnace are continuously reduced and lowered in the process of reducing and melting the iron ores and coke in the upper part of the tuyere.

Such continuous friction between the iron ore and coke and the stove damages the front edge of the stove and damages the cooling pipe installed therein when the stove front is damaged.

Provided is a cooling pipe repairing apparatus and method for repairing a cooling pipe of a blast furnace, which can be easily repaired without leakage of cooling water and gas by supplying a strip directly to the broken cooling pipe to seal the damaged area.

A cooling pipe repair apparatus for a blast furnace includes a cladding strip supplied to a damaged portion of a cooling pipe to seal a damaged portion thereof; A strip feeding unit adapted to automatically feed the cladding strip to a damaged portion of the cooling pipe; A strip winding unit for continuously winding the cladding strip supplied and supplied inside the damaged portion of the cooling pipe and fixing the cladding strip to a damaged portion of the cooling pipe; And an input unit connected to the rear of the strip winding unit to input the strip winding unit to the inside of the broken cooling pipe.

The charging unit may have a structure of a rod or pipe having a predetermined length.

The strip feeding unit may include one or more rollers installed at upper and lower portions of the cladding strip to supply the cladding strip through rotation, and a motor electrically connected to the rollers to rotate the rollers.

And a control unit electrically connected to the rollers of the strip feeding unit to control a supply amount and a feeding speed of the cladding strip.

The strip winding unit may include a housing having a cylindrical shape so that the cladding strip can be inserted into the strip winding unit, and an induction groove formed in a spiral shape on the inner wall of the housing to guide the cladding strip in a downward direction .

The strip winding unit may further include one or more bearings installed at adjacent positions of the guide groove and adapted to slide the cladding strip to be inserted.

The strip winding unit may have a structure in which a finishing material is welded to the inlet and outlet side ends of the housing so that the bearing can be maintained in the guide groove in the housing.

The cladding strip may be a double structure in which a shape memory alloy and a high temperature synthetic resin are bonded to each other.

A method for repairing a cooling pipe of a blast furnace includes the steps of: supplying a cooling pipe repair device to a damaged portion of the cooling pipe constituting the blast furnace; Feeding a cladding strip to the damaged portion of the cooling pipe by supplying a cladding strip to the cooling pipe repair device; A cladding strip winding step of winding the cladding strip inserted through the cooling pipe repair device on a damaged portion of the cooling pipe so as to be piled up in a cylindrical shape; Applying a hot wind to the cladding strip fixed in a wound state at the damaged portion of the cooling pipe to cure the cladding strip; And a step of fixing the cladding strip to the damaged portion of the cooling pipe while being expanded by hot hot air.

The cladding strip fed to the cooling pipe repair device may be formed by bonding a shape memory alloy and a high temperature synthetic resin.

The cladding strip cylindrically stacked in the winding step of the cladding strip may form a metal pipe for restoring a damaged portion of the cooling pipe.

In the curing step of the cladding strip, the shape memory alloy of the cladding strip is expanded by high temperature, and the metal hysteresis is lost and can be hardened.

The high temperature synthetic resin of the cladding strip is cured and the wound cladding strip can be closely fixed to the cladding strip.

According to this apparatus, it is possible to easily repair the damaged portion of the cooling pipe without leakage of cooling water and gas when the cooling pipe of the stove provided in the blast is damaged.

Further, since any metal pipe is formed in the cooling pipe of the damaged stave, the cooling function of the stave can be restored, and the heat load of the stove itself can be reduced and the lifetime can be increased.

1 is a schematic view showing a cooling pipe repair apparatus of a stave according to the embodiment.
2 is a schematic view showing a structure of a cooling pipe repair apparatus according to the present embodiment.
3 is a schematic view showing a strip winding unit of a cooling pipe repair apparatus according to the present embodiment.
4 is a schematic view showing the durability construction of the strip winding unit according to the present embodiment.
5 is a schematic view showing the construction of a cladding strip to be charged into a broken cooling pipe according to the present embodiment.
FIG. 6 is a schematic view showing a change state of the cladding strip inserted through the cooling pipe repair apparatus according to the present embodiment.
7 is a flowchart illustrating a process of repairing the cooling pipe of the stave according to the present embodiment.
FIG. 8 is a view showing the temperature distribution along the length of the cooling pipe of the stave according to the present embodiment.
9 is a view showing a temperature reduction after repairing the cooling pipe of the stave according to the present embodiment.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms as used herein include plural forms as long as the phrases do not expressly express the opposite meaning thereto. Means that a particular feature, region, integer, step, operation, element and / or component is specified, and that other specific features, regions, integers, steps, operations, elements, components, and / And the like.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Accordingly, the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

1 is a schematic view showing a cooling pipe repair apparatus of a stave according to the embodiment.

2 is a schematic view showing a structure of a cooling pipe repair apparatus according to the present embodiment.

As shown in FIGS. 1 and 2, a stove 1 to be repaired by a maintenance apparatus is installed inside a blast furnace 10 of a blast furnace, and the stave structure is a cooling pipe And an inlet 20a and an outlet 20b are formed on the lower portion of the cooling pipe 20 so as to protrude therefrom.

The cooling pipe repair device of the blast furnace 1 for repairing the damaged part charged in the damaged part of the cooling pipe 20 includes a cladding strip 30, a strip feeding part 40, a strip winding part 50, And an input unit (60).

In this embodiment, the cladding strip 30 is inserted into the damaged portion of the cooling pipe 20 by using the strip feeding portion 40 and the strip winding portion 50, The cladding strip 30 wound around the damaged portion of the cooling pipe 20 can form the metal tube 2 for maintenance.

That is, the cladding strip 30 can be supplied to the damaged part of the cooling pipe 20 to seal the damaged part, and the strip feeding part 40 can prevent the cladding strip 30 from damaging the cooling pipe 20 Can be supplied automatically.

In addition, the strip winding unit 50 may continuously wind the cladding strip 30 inserted into the damaged portion of the cooling pipe 20 and fix the cladding strip 30 to the damaged portion of the cooling pipe 20.

Therefore, the cooling pipe repair device feeds the cladding strip 30 in a wound state on the broken part of the cooling pipe 20, and the cladding strip 30 is supplied through the strip feeding part 40 Is supplied to the breakage portion of the cooling pipe (20), and the supplied cladding strip (30) is wound around the strip winding portion (50) and installed at the breakage portion of the cooling pipe (20).

The input unit 60 is connected to the rear of the strip winding unit 50 to allow the strip winding unit 50 to be inserted into the damaged cooling pipe 20, 60 may be a structure made of a rod or pipe having a certain length.

Here, the strip winding unit 50 is inserted into the damaged portion of the cooling pipe 20 using the input unit 60, and in this state, the cladding strip 30 passes through the strip winding unit 50 A new metal pipe 2 is formed at the damaged portion of the cooling pipe 20.

The strip feeding unit 40 constituting the maintenance apparatus of the present embodiment includes one or more rollers 41 installed at upper and lower portions of the cladding strip 30 and supplying the cladding strip 30 through rotation, And a motor 42 that is electrically connected to the roller 41 to rotate the roller 41.

The roller 41 is disposed at the upper and lower portions of the cladding strip 30 and advances the cladding strip 30 through the rotation of the roller 41. The roller 41 rotates through the operation of the motor 42 .

The control unit 70 may further include a controller 70 electrically connected to the roller 41 of the strip feeding unit 40 to control the supply amount and the feeding speed of the cladding strip 30.

The control unit 70 is electrically connected to the motor 42 of the strip feeding unit 40 to control the operation time and the operation speed of the motor 42 so that the rotation of the roller 41 connected to the motor 42 Can be controlled.

Therefore, when the cooling pipe 20 of the stove 1 provided in the blast furnace is damaged by using the above-described repairing apparatus, the cooling pipe 20 having a curvature without leakage of cooling water and gas in a state where the stove 1 is mounted to the blast furnace, (20) can be more easily repaired.

3 is a schematic view showing a strip winding unit of a cooling pipe repair apparatus according to the present embodiment.

4 is a schematic view showing the durability construction of the strip winding unit according to the present embodiment.

3 and 4, the strip winding unit 50 includes a housing 51 having a cylindrical shape so that the cladding strip 30 can be inserted into the inside of the strip winding unit 50, And an induction groove 52 formed in a spiral shape so as to guide the cladding strip 30 in a downward direction.

That is, the housing 51 has the guide groove 52 spirally formed on its inner wall, and the cladding strip 30 inserted at the upper inlet is wound along the guide groove 52 and is discharged to the lower outlet The discharged cladding strip 30 maintains a wound form.

The strip winding unit 50 may further include at least one bearing 53 installed at a position adjacent to the guide groove 52 so that the cladding strip 30 can be slid.

The bearing 53 is installed along the inner side of the spiral guide groove 52 to more effectively guide the movement of the cladding strip 30 through the guide groove 52.

The strip winding unit 50 is configured to have a structure in which the finishing material 54 is welded to the inlet and outlet side ends of the housing 51 so that the bearing 53 can be maintained in the guide groove 52 in the housing 51 Lt; / RTI >

The strip winding unit 50 has the guide groove 52 through which the cladding strip 30 can pass and a bearing 53 is installed in the guide groove 52 so that the cladding strip 30 can be moved effectively. And a finishing material 54 is provided on the inlet side and the outlet side of the housing 51 to maintain the state where the bearing 53 is installed inside the housing 51. [

Since the diameter of the bearing 53 is larger than the opening of the guide groove 52, the bearing 53 is rotated without being separated from the guide groove 52, The bearings 53 are accommodated in the guide grooves 52 by covering the entrance and exit sides of the housing 51 formed with the guide grooves 52 with the finish material 54.

5 is a schematic view showing the construction of a cladding strip to be charged into a broken cooling pipe according to the present embodiment.

5, the cladding strip 30 is a double structure in which the shape memory alloy 31 and the high-temperature synthetic resin 32 are bonded to each other. In the metal tube 2 formed of the cladding strip 30, In the case of the presence of the abrasive, the shape memory alloy 31 loses its hysteresis after expansion and becomes tightly adhered, and the high temperature synthetic resin 32 is cured to seal the gap between the cladding strips 30.

FIG. 6 is a schematic view showing a change state of the cladding strip inserted through the cooling pipe repair apparatus according to the present embodiment.

As shown in FIG. 6, after the cladding strip 30 is wound in the broken cooling pipe 20 and the cooling line of the blast furnace 1 is connected with the cylindrical structure, The shape memory alloy 31 of the cladding strip 30 is expanded and the metal hysteresis is lost, so that the expansion of the shape memory alloy 31 is stopped.

In addition, the high temperature synthetic resin 32 of the cladding strip 30 expands together with the expansion of the adjacent shape memory alloy 31, and is hardened due to high temperature, thereby naturally sealing the gap between the strip and the strip .

Through the above process, a new metal pipe 2 is formed at the damaged portion of the cooling pipe 20, and the cooling water can be flowed to the metallic pipe 2.

7 is a flowchart illustrating a process of repairing the cooling pipe of the stave according to the present embodiment.

As shown in Fig. 7, the method for repairing a cooling pipe of a blast furnace includes the steps of: (S1) inputting a cooling pipe repair device to a damaged portion of the cooling pipe 20 constituting the blast furnace 1; (S2) feeding the cladding strip (30) to the damaged portion of the cooling pipe (20) by supplying the cladding strip (30) to the cooling pipe repair device; A cladding strip winding step (S3) of winding the cladding strip (30) inserted through the cooling pipe repair device on a damaged portion of the cooling pipe (20) so as to stack them in a cylindrical shape; (S4) applying hot air to the cladding strip (30) fixed in a wound state at the damaged portion of the cooling pipe (20) to cure the cladding strip (30); And a step S5 of tightly fixing the cladding strip 30 to a damaged portion of the cooling pipe 20 while being expanded by hot hot air.

That is, according to the cooling pipe repairing method, the cooling pipe repairing device is put into the damaged portion of the cooling pipe 20, and the cladding strip 30 is supplied to the repairing device in this state, The cladding strip 30 is rolled so that the blast furnace is operated to blow hot air to the stove 1 to heat the cladding strip 30 constituting the tube.

As the cladding strip 30 is heated, the cladding strip 30 forming the tube is cured and expanded, so that the space between the strip and the strip is sealed to form the metal tube 2.

The cladding strip 30 fed to the cooling pipe repair device may be formed by joining the shape memory alloy 31 and the high temperature synthetic resin 32 and may be stacked in a cylindrical shape at the winding stage of the cladding strip 30 The cladding strip 30 can form a metal tube 2 for restoring a damaged portion of the cooling pipe 20.

Therefore, the repair of the cooling pipe 20 can be completed because the metal pipe 2 forms a pipe replacing the broken cooling pipe 20.

As described above, in the repairing method according to the present embodiment, the shape memory alloy 31 of the cladding strip 30 is expanded by the high temperature in the curing step of the cladding strip 30, and the metal hysteresis is lost to be hardened The high temperature synthetic resin 32 of the cladding strip 30 is cured and the cladding strip 30 wound on the cladding strip 30 can be tightly fixed.

FIG. 8 is a view showing the temperature distribution along the length of the cooling pipe of the stave according to the present embodiment.

9 is a view showing a temperature reduction after repairing the cooling pipe of the stave according to the present embodiment.

8 and 9, when a breakage occurs in the cooling pipe 20 of the stave 1, under the condition that the cooling water is circulated at the 600 ° C surface under an arbitrary condition, the damaged cooling pipe 20, And the temperature distribution of the cooling pipe 20 that has been repaired through this embodiment are analyzed. As a result, when the cooling pipe 20 is damaged as shown in FIGS. 8 and 9 (a) The localized temperature is raised close to 600 ° C, and when the present embodiment is applied as shown in (b), the heat load distribution is about 100 ° C lower than that of the unbroken portion.

On the basis of this, when the repairing method according to the present embodiment is applied, the heat load can be reduced to about 100 ° C.

Therefore, by forming an arbitrary metal tube 2 in the cooling pipe 20 of the broken stave 1 to restore the cooling function of the stave 1, it is possible to reduce the thermal load and the life span of the stove 1 itself .

While the illustrative embodiments of the present invention have been shown and described, various modifications and alternative embodiments may be made by those skilled in the art. Such variations and other embodiments will be considered and included in the appended claims, all without departing from the true spirit and scope of the invention.

1: stave 2: metal tube
10: scrap 20: cooling pipe
20a: Inlet 20b: Outlet
30: Cladding strip 31: Shape memory alloy
32: high temperature synthetic resin 40: strip feeding part
41: roller 42: motor
50: strip winding part 51: housing
52: guide groove 53: bearing
54: Finishing material 60:
70:

Claims (13)

A cooling pipe repair apparatus for a blast furnace includes a cladding strip supplied to a damaged portion of a cooling pipe to seal a damaged portion thereof;
A strip feeding unit adapted to automatically feed the cladding strip to a damaged portion of the cooling pipe;
A strip winding unit for continuously winding the cladding strip supplied and supplied inside the damaged portion of the cooling pipe and fixing the cladding strip to a damaged portion of the cooling pipe; And
And an input unit connected to the rear of the strip winding unit to allow the strip winding unit to be inserted into the damaged cooling pipe,
Wherein the strip winding portion includes a housing having a cylindrical shape so that the cladding strip can be inserted into the strip winding portion, and an induction groove formed in a spiral shape on the inner wall of the housing to guide the cladding strip in a downward direction,
Wherein the strip winding portion further includes at least one bearing installed at a position adjacent to the guide groove and adapted to slide the cladding strip to be inserted,
Wherein the strip winding portion is welded to the inlet and outlet side end portions of the housing so that the bearing can be maintained in the guide groove in the housing. The method according to claim 1,
Wherein the charging unit comprises a rod or a pipe having a predetermined length. The method according to claim 1,
Wherein the strip feeding part includes at least one roller installed at each of upper and lower portions of the cladding strip and supplying the cladding strip through rotation, and a motor electrically connected to the roller to rotate the roller. The method of claim 3,
And a control unit electrically connected to the rollers of the strip feeding unit to control a supply amount and a feeding speed of the cladding strip. delete delete delete The method according to claim 1,
Wherein the cladding strip is a double-structured blast-furnace cooling pipe repair apparatus in which a shape memory alloy and a high-temperature synthetic resin are bonded to each other. (S1) of supplying a cooling pipe maintenance device to a damaged portion of the cooling pipe constituting the blast furnace;
Feeding a cladding strip to the damaged portion of the cooling pipe by supplying a cladding strip to the cooling pipe repair device (S2);
A cladding strip winding step (S3) of winding the cladding strip inserted through the cooling pipe repair device on a damaged portion of the cooling pipe so as to be piled up in a cylindrical shape;
(S4) applying hot air to the cladding strip fixed in a wound state at the damaged portion of the cooling pipe to harden the cladding strip; And
(S5) in which the cladding strip is tightly fixed to a damaged portion of the cooling pipe while being expanded by hot hot air,
The cladding strip fed to the cooling pipe repair device is formed by bonding a shape memory alloy and a high temperature synthetic resin,
In the curing step of the cladding strip, the shape memory alloy of the cladding strip is expanded by high temperature, and the metal hysteresis is lost,
Wherein the high temperature synthetic resin of the cladding strip is hardened while the cladding strip is tightly fixed to the cladding strip. delete 10. The method of claim 9,
Wherein the cladding strip cylindrically stacked in the winding step of the cladding strip is a metal tube for restoring a damaged portion of the cooling pipe. delete delete
KR1020150063845A 2015-05-07 2015-05-07 Apparatus for repairing the cooling pipe of stave blast furnace and this method KR101632735B1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101842579B1 (en) * 2017-03-17 2018-03-27 포항공과대학교 산학협력단 Stave
CN110846452A (en) * 2019-11-27 2020-02-28 邯郸钢铁集团有限责任公司 Device and method for searching leakage point of damaged cooling wall of blast furnace
CN114352839A (en) * 2022-01-12 2022-04-15 山东钢铁集团日照有限公司 Blast furnace cooling wall connecting pipe leakage stopping device and method
CN114918633A (en) * 2022-06-27 2022-08-19 宝武集团鄂城钢铁有限公司 Method for repairing water leakage at root of copper pipe and copper cooling wall

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140032698A (en) * 2012-09-07 2014-03-17 주식회사 포스코 Method for repairing the damaged stave of blast furnace
KR20150007142A (en) * 2013-07-10 2015-01-20 신일동 주식회사 A pipe lining method and apparatus for suppling strip

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140032698A (en) * 2012-09-07 2014-03-17 주식회사 포스코 Method for repairing the damaged stave of blast furnace
KR20150007142A (en) * 2013-07-10 2015-01-20 신일동 주식회사 A pipe lining method and apparatus for suppling strip

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101842579B1 (en) * 2017-03-17 2018-03-27 포항공과대학교 산학협력단 Stave
CN110846452A (en) * 2019-11-27 2020-02-28 邯郸钢铁集团有限责任公司 Device and method for searching leakage point of damaged cooling wall of blast furnace
CN110846452B (en) * 2019-11-27 2024-02-09 邯郸钢铁集团有限责任公司 Device and method for searching leakage points of damaged cooling wall of blast furnace
CN114352839A (en) * 2022-01-12 2022-04-15 山东钢铁集团日照有限公司 Blast furnace cooling wall connecting pipe leakage stopping device and method
CN114918633A (en) * 2022-06-27 2022-08-19 宝武集团鄂城钢铁有限公司 Method for repairing water leakage at root of copper pipe and copper cooling wall
CN114918633B (en) * 2022-06-27 2023-07-14 宝武集团鄂城钢铁有限公司 Method for repairing water leakage at root parts of copper pipe and copper cooling wall

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