KR101636925B1 - Apparatus and method for repairing damaged stave - Google Patents
Apparatus and method for repairing damaged stave Download PDFInfo
- Publication number
- KR101636925B1 KR101636925B1 KR1020150120639A KR20150120639A KR101636925B1 KR 101636925 B1 KR101636925 B1 KR 101636925B1 KR 1020150120639 A KR1020150120639 A KR 1020150120639A KR 20150120639 A KR20150120639 A KR 20150120639A KR 101636925 B1 KR101636925 B1 KR 101636925B1
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- KR
- South Korea
- Prior art keywords
- press
- stave
- air
- connection part
- piping port
- Prior art date
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Classifications
-
- 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
- C21B7/04—Blast furnaces with special refractories
- C21B7/06—Linings for furnaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Blast Furnaces (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
Description
The present invention relates to a stave breakage repairing apparatus and method, and more particularly, to a stave breakage repairing apparatus and method capable of repairing breakage of a corona furnace stave during normal operation.
Generally, the blast furnace is a facility for continuously producing charcoal for 24 hours, charging iron ore and coke alternately to the upper part, blowing hot air of about 1100 ~ 1200 ° C to the lower part, .
The hot air entering the tuyere reacts with the fuel coke to produce a high temperature of 2,200 ° C to 2,400 ° C and melts the iron ore, which is the raw material, by using this high heat to produce charcoal.
A stove having a cooling water pipe circulating and supplying cooling water is installed on the inner surface of the furnace iron furnace of the furnace in order to protect the furnace iron from the high temperature generated in the furnace.
In order to prevent this, it is necessary to repair the stave before the breakdown time has elapsed. In order to prevent this, it is necessary to repair the stave before the breakdown time has elapsed.
However, during the normal operation of the blast furnace, the pressure in the furnace takes about 4 Kg / cm 2 , and various foreign substances are contained in the furnace gas stream. In order to pressurize the pressurized material into the cooling water pipe, the pressure in the furnace must be 0 to 1 kg / cm 2 , and the inside of the cooling water pipe must be clean without any foreign substance.
As a result, it is inevitable to repair the blast furnace after a long period of hibernation. In addition, if the breakage is not repaired in a timely manner, there is a possibility that cracks will be generated in the surrounding wicking due to the broken stave, and it becomes very difficult to achieve the aging management and normal operation. It is necessary to repair the stave in a timely manner during normal operation.
An object of the present invention is to provide a stave breakage repair apparatus and method capable of repairing a stave during normal operation when a corona body stave breakage occurs.
The solution to the problem of the present invention is not limited to those mentioned above, and other solutions not mentioned can be clearly understood by those skilled in the art from the following description.
A stave breakage repairing apparatus according to a preferred embodiment of the present invention is a stave breakage repairing apparatus for repairing breakage of a cooling water pipe connecting a first pipe port and a second pipe port in a stave, A first connection part for selectively supplying steam, air, and press-fitting material through the first connection part or closing the first piping part; And a second connection part for selectively supplying steam, air, and press-fit material through the second piping port or closing the second piping port, wherein the second connection part is provided with the second piping port, The first connection part supplies steam, the second connection part supplies air, and the first connection part supplies the press-fitting material.
The first connection portion and the second connection portion simultaneously supply air at a first pneumatic pressure after the first connection portion supplies steam with the second connection portion closing the second piping port, It is preferable that air is supplied at a second pneumatic pressure lower than the first pneumatic pressure, and the first connection portion supplies the press-fitting material.
The first pneumatic pressure is preferably 12 to 13 kg / cm 2 , and the second pneumatic pressure is preferably a normal operating pressure.
It is preferable that the stave breakage repairing apparatus further comprises a press-fitting member blocking portion for preventing back flow of the press-fitting member in at least one of the first connecting portion and the first piping hole and between the second connecting portion and the second piping hole Do.
It is preferable that the press-fitting member blocking portion includes a plurality of protrusions therein or a protrusion extending spirally along an inner circumferential surface of a cylindrical pipe-like shape.
A method for repairing a stave breakage according to a preferred embodiment of the present invention is a stave breakage repairing method for repairing breakage of a cooling water pipe connecting a first pipeline port and a second pipeline port in a stave, Closing the second piping port or the first piping port and supplying the steam through the first piping port or the second piping port; And (b) applying air pressure through the second piping port or the first piping port, and press-fitting the press-fitting member into the first piping port or the second piping port.
Wherein the step (a) closes the second piping port and supplies the steam through the first piping port, and the step (b) The method further comprises the step of press-fitting the press-fit material into the first pipe port and simultaneously applying the first pneumatic pressure between the step (a) and the step (b) through the first pipe port and the second pipe port And the air pressure in the step (b) is preferably a second air pressure lower than the first air pressure.
The first pneumatic pressure is preferably 12 to 13 kg / cm 2 , and the second pneumatic pressure is preferably a normal operating pressure.
The stave breakage repairing apparatus and method of the present invention have the following effects.
(1) The apparatus and method for repairing and repairing a stave breakage of the present invention can repair the stave breakage even during normal operation.
(2) The apparatus and method for repairing stave breakage according to the present invention prevent backflow of the press-fitting member during insertion or insertion of the press-fitting member for stab repair.
(3) The stave breakage repair apparatus and method of the present invention reduce the heat load of the furnace stave.
(4) The apparatus and method for repairing stave breakage according to the present invention prevent cracking of the furnace body iron.
(5) The stave breakage repairing method and method of the present invention prevents additional breakage of the furnace stave.
(6) The apparatus and method for repairing and repairing stave breakage of the present invention prevent generation of heat in the piping valve of the furnace stove.
(7) The apparatus and method for repairing stave breakage of the present invention facilitate blast furnace burning management.
The effects of the present invention are not limited to those mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a steam breakage repairing apparatus according to a preferred embodiment of the present invention for supplying steam to a stave pipe; FIG.
2 is a view showing that a stave breakage repairing apparatus according to a preferred embodiment of the present invention applies a high pressure air pressure to a stave pipe.
3 is a view showing that the stave breakage repairing device according to the preferred embodiment of the present invention applies normal operating pressure to the stave pipe and presses the press-fitting member.
4 is a view illustrating a state in which a stave breakage repairing apparatus according to a preferred embodiment of the present invention completes maintenance of a stave.
5 is a flowchart of a stave breakage repair method according to a preferred embodiment of the present invention.
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.
FIG. 1 is a view showing that a stave breakage repairing apparatus according to a preferred embodiment of the present invention supplies steam to a stave pipe, FIG. 2 is a schematic view of a stave breakage repairing apparatus according to a preferred embodiment of the present invention, 3 is a view showing that the stave breakage repairing device according to the preferred embodiment of the present invention applies normal operating pressure to the stave pipe and presses the press-fitting member .
The stave
The
The stave
The
The
The
The
The
The stave
1, the
The steam supplied at a high temperature and pressure causes dirty foreign matter and by-products in the
2, when the
The steam /
3, the
The steam /
The press
The second pneumatic pressure by the
The step of supplying the second air pressure to the cooling
It is preferable that the stave breakage repairing apparatus according to the preferred embodiment of the present invention further includes a press
The press
When the
4 is a view illustrating a state in which a stave breakage repairing apparatus according to a preferred embodiment of the present invention completes maintenance of a stave. The
5 is a flowchart of a stave breakage repair method according to a preferred embodiment of the present invention.
The method of repairing stave breakage according to the preferred embodiment of the present invention includes a step S100 of closing the
While the present invention has been described in connection with certain exemplary embodiments, it will be understood by those skilled in the art that various changes may be made without departing from the scope of the present invention.
1: evil 2: stave
10: cooling water piping 11: first piping port
12: second piping port 13: first valve
14: second valve 15: cracked portion
100: stave breakage repairing device 110: first connection part
112: steam / air piping 113: steam / air valve
114: press-fit re-pipe 115: press-fit valve
120: second connection part 122: air piping
123: air valve 130: press-
132: protrusion
Claims (11)
A first connection part for selectively supplying steam, air, and press-fit material through the first piping port or closing the first piping port; And
And a second connection part for selectively supplying steam, air, and press-fitting material through the second piping port or closing the second piping port,
After the second connection portion closes the second piping port and the first connection portion supplies steam,
Wherein the first connection portion and the second connection portion simultaneously supply air at a first air pressure,
Wherein the second connection part supplies air at a second air pressure lower than the first air pressure, and the first connection part supplies the press-fitting material.
And the first pneumatic pressure is 12 to 13 kg / cm < 2 >.
And the second pneumatic pressure is a normal operating pressure.
Further comprising a press-fitting member blocking portion for preventing back-flow of the press-fitting member in at least one of the first connecting portion and the first piping hole, and between the second connecting portion and the second piping hole. .
Wherein the press-fitting member blocking portion includes a plurality of protrusions inside.
Wherein the press-fitting member blocking portion includes a cylindrical tube-shaped protrusion extending spirally along an inner circumferential surface thereof.
Closing the second piping port and supplying steam through the first piping port;
Simultaneously applying a first pneumatic pressure through the first piping port and the second piping port; And
Applying a second pneumatic pressure lower than the first pneumatic pressure through the second piping port, and pressing the press-fitting member into the first piping port.
Wherein the first pneumatic pressure is 12 to 13 kg / cm < 2 >.
And the second pneumatic pressure is a normal operating pressure.
Priority Applications (1)
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KR1020150120639A KR101636925B1 (en) | 2015-08-27 | 2015-08-27 | Apparatus and method for repairing damaged stave |
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KR1020150120639A KR101636925B1 (en) | 2015-08-27 | 2015-08-27 | Apparatus and method for repairing damaged stave |
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KR101636925B1 true KR101636925B1 (en) | 2016-07-06 |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61107090A (en) * | 1984-10-29 | 1986-05-24 | 住友金属工業株式会社 | Method of repairing cooling pipe for furnace body |
JP2005008908A (en) | 2003-06-16 | 2005-01-13 | Kobe Steel Ltd | Method for repairing outer steel shell in blast furnace |
KR101167131B1 (en) | 2009-06-26 | 2012-07-20 | 현대제철 주식회사 | Blast furnace with cooling plate |
KR20140032698A (en) | 2012-09-07 | 2014-03-17 | 주식회사 포스코 | Method for repairing the damaged stave of blast furnace |
-
2015
- 2015-08-27 KR KR1020150120639A patent/KR101636925B1/en active IP Right Grant
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61107090A (en) * | 1984-10-29 | 1986-05-24 | 住友金属工業株式会社 | Method of repairing cooling pipe for furnace body |
JP2005008908A (en) | 2003-06-16 | 2005-01-13 | Kobe Steel Ltd | Method for repairing outer steel shell in blast furnace |
KR101167131B1 (en) | 2009-06-26 | 2012-07-20 | 현대제철 주식회사 | Blast furnace with cooling plate |
KR20140032698A (en) | 2012-09-07 | 2014-03-17 | 주식회사 포스코 | Method for repairing the damaged stave of blast furnace |
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