JPH044365B2 - - Google Patents
Info
- Publication number
- JPH044365B2 JPH044365B2 JP2123787A JP2123787A JPH044365B2 JP H044365 B2 JPH044365 B2 JP H044365B2 JP 2123787 A JP2123787 A JP 2123787A JP 2123787 A JP2123787 A JP 2123787A JP H044365 B2 JPH044365 B2 JP H044365B2
- Authority
- JP
- Japan
- Prior art keywords
- stave
- blast furnace
- refractory material
- steel shell
- protection tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 239000011819 refractory material Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 8
- 239000007789 gas Substances 0.000 description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 239000000498 cooling water Substances 0.000 description 10
- 239000002184 metal Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 230000001681 protective effect Effects 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 5
- 239000002360 explosive Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000009418 renovation Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Blast Furnaces (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、高炉の鉄皮内壁として設けられた
ステーブの改修に際し、ステーブの取付状況如何
に拘らず迅速、且つ的確にステーブの剥離除去を
可能とする高炉ステーブの取外し工法に関するも
のである。[Detailed Description of the Invention] (Field of Industrial Application) This invention enables rapid and accurate peeling and removal of staves, regardless of how they are installed, when repairing staves installed as the inner wall of a blast furnace. The present invention relates to a method for removing blast furnace staves.
（従来の技術）
高炉鉄皮内壁として設けたステーブは、巾約
1000mm、高さ約2000mm、厚さ約270mmの鋳鉄鋳物
であり、高炉の大きさにより異なるが、炉１基当
り200〜500個と数多く取付けられている。(Prior technology) The stave installed as the inner wall of the blast furnace shell has a width of approximately
They are made of cast iron and are 1000 mm long, approximately 2000 mm high, and approximately 270 mm thick.Depending on the size of the blast furnace, they are installed in large numbers, 200 to 500 per furnace.
高炉が永年の高炉溶解操業により、炉体各部に
疲労損耗が生じたとき改修工事を行うのである
が、鉄皮内壁ステーブも当然損耗すると共に破損
するので、これを取替える必要がある。ステーブ
は前記の如く多数取付けられ、炉内の高温の影響
を受けて変形し、相互に固着したり、鉄皮に緊着
するので、ステーブを鉄皮より取外すときは、人
力で槌打した程度では、剥離することは困難であ
る。従つて、従来の取外し工法としては
(1) ステーブ本体に内蔵した冷却水管内に爆薬を
充填し、爆薬の爆発力を利用してステーブを鉄
皮より剥離する方法。 Renovation work is carried out when blast furnaces experience fatigue and wear and tear in various parts of the furnace body due to years of blast furnace melting operations, and the inner wall stave of the iron shell also naturally wears out and breaks, so it is necessary to replace it. As mentioned above, a large number of staves are attached, and they deform under the influence of the high temperature inside the furnace, stick to each other, or stick tightly to the steel shell. It is difficult to peel it off. Therefore, the conventional removal method is (1) Filling the cooling water pipe built into the stave body with explosives and using the explosive power of the explosives to separate the stave from the iron skin.
(2) 油圧器を鉄皮に着装し、ステーブ本体に内蔵
されている冷却水管の外側端面を油圧力により
炉内に押出し、ステーブを鉄皮より剥離する方
法。(2) A method in which a hydraulic device is attached to the steel shell, and the outer end of the cooling water pipe built into the stave body is pushed into the furnace using hydraulic pressure, and the stave is separated from the steel shell.
が採用され、高炉改修工事を可能な限り短期間と
するよう努力が払われている。has been adopted, and efforts are being made to shorten the blast furnace renovation work as much as possible.
ステーブ本体に内蔵されている冷却水管を保護
している保護管外周は、鉄皮外面に設けられたガ
スシール金物内に充填された耐火材により、ガス
シール金物と一体となり、炉内より漏洩するガス
を防ぐよう緊結、固着された状態となつている。
そのため、上記従来の(1)や(2)の工法により、ステ
ーブを取外す作業の前段階において、ガスシール
金物内の充填耐火材を一部除去し、保護管外周に
環状の空隙を作り出し、保護管を拘束しない状態
とし、ステーブが油圧力か、爆発力により炉内に
押し出される際に、容易に移動出来るようにする
必要がある。このガスシール金物内の保護管外周
の固結した充填耐火材（ステーブ１組にガスシー
ル金物は４箇所取付けられ、充填耐火材は高炉１
基当り800乃至2000個所ある）はカツターによる
切断や人手の斫り作業に依存しているので、１個
所約20〜30分程を要し、多数の作業者で長期間掛
かつている現状である（参考技術特開昭51−
25799号）
（発明が解決しようとする問題点）
本発明は前記従来のステーブ取外し工法に比
し、簡易でかつ工期を格段に短縮できるステーブ
の取外し工法を提供するものである。 The outer periphery of the protection tube that protects the cooling water pipe built into the stave body is integrated with the gas seal metal fittings due to the refractory material filled in the gas seal metal fittings provided on the outer surface of the steel shell, preventing leakage from inside the furnace. It is tightly tied and fixed to prevent gas.
Therefore, using the conventional methods (1) and (2) above, before removing the stave, part of the refractory filling inside the gas seal metal fittings is removed to create an annular gap around the outer periphery of the protective pipe, which protects the pipe. The tube must be unrestrained and must be able to move easily as the stave is forced into the furnace by hydraulic or explosive forces. The solidified filling refractory material on the outer periphery of the protective tube in this gas seal hardware (the gas seal hardware is attached to four locations in one set of staves, and the filling refractory material is
(There are 800 to 2,000 pieces per unit) relies on cutting with a cutter and manual combing, so each piece takes about 20 to 30 minutes, and the current situation is that many workers are working on it for a long time. (Reference technology Japanese Unexamined Patent Publication 1973-
(No. 25799) (Problems to be Solved by the Invention) The present invention provides a stave removal method that is simpler and can significantly shorten the construction period compared to the conventional stave removal method.
（問題点を解決するための手段）
本発明は高炉の鉄皮外面に設けられたガスシー
ト金物の充填耐火材と接するステーブ保護管にス
リツトを切り込み、前記充填耐火材と保護管の間
に微細な空隙を形成せしめ鉄皮内壁ステーブの移
動を容易にして外力を付与しステーブを剥離除去
することを特徴とするものである。(Means for Solving the Problems) The present invention provides for cutting a slit in a stave protection tube that is in contact with a filled refractory material of a gas sheet metal provided on the outer surface of a blast furnace steel shell, and providing fine particles between the filled refractory material and the protection tube. This method is characterized in that the stave is peeled off and removed by forming an air gap to facilitate movement of the stave on the inner wall of the iron shell and applying an external force.
即ち、本発明は上記従来工法によるガスシール
金物内充填耐火材の除去を行わずに保護管の抵抗
を減じせしめるため、高速切断装置等を利用し、
短時間（１個所２分程度）で高炉鉄皮外面より、
ステーブ保護管に細いスリツトを入れることによ
りガスシール金物内充填耐火材と保護管の間に空
隙の形成を容易にせしめ、高炉内壁ステーブを迅
速に剥離除去するものである。以下、その工法に
ついて実施例によつて詳細に説明する。 That is, the present invention utilizes a high-speed cutting device etc. in order to reduce the resistance of the protection tube without removing the refractory material filled in the gas seal hardware as in the conventional method.
from the outer surface of the blast furnace shell in a short time (about 2 minutes per location).
By making a thin slit in the stave protection tube, a gap is easily formed between the refractory material filled in the gas seal metal fittings and the protection tube, and the stave on the inner wall of the blast furnace can be quickly peeled off and removed. The construction method will be explained in detail below using examples.
（実施例）
第１図は高炉１の縦断面を示すもので、２は鉄
皮、３はステーブである。第２〜５図に示すよう
にステーブ３は通常８個所の冷却水管８とその保
護管４−１，４−２，５−１，５−２，６−１，
６−２，７−１，７−２が内蔵され、両端は夫々
鉄皮外面に突出している。この保護管の外周部は
ガスシール金物Ｃに於て、充填耐火材１１によつ
て、高炉内の燃焼ガスが漏洩しないように緊結固
着されている。また該ステーブ３は４個所のステ
ーブ取付ボルト９により鉄皮２に緊縛されてい
る。(Example) Fig. 1 shows a longitudinal section of a blast furnace 1, in which 2 is an iron shell and 3 is a stave. As shown in FIGS. 2 to 5, the stave 3 usually has eight cooling water pipes 8 and their protective pipes 4-1, 4-2, 5-1, 5-2, 6-1,
6-2, 7-1, and 7-2 are built in, and both ends protrude from the outer surface of the steel shell. The outer periphery of this protection tube is tightly fixed to gas seal metal fittings C with a filled refractory material 11 to prevent combustion gas from leaking inside the blast furnace. Further, the stave 3 is tightly bound to the steel shell 2 by four stave mounting bolts 9.
本発明は高速切断器（酸素アーク切断器）のア
ーク発生部を鉄皮側から冷却水管８内に挿入し、
冷却水管８とその保護管５−１〜７−２に数mm〜
数cmのスリツト１２を入れ（この場合、冷却水管
８を同時に切断しても講わない）、ステーブ取付
ボルト９を切断し、小容量の油圧器にて冷却水管
８を炉外より押し、ステーブ３を鉄皮２より剥離
せしめ、効率良く炉内に落下させ取外すものであ
る。 The present invention inserts the arc generating part of a high-speed cutter (oxygen arc cutter) into the cooling water pipe 8 from the steel skin side,
A few mm to the cooling water pipe 8 and its protection pipes 5-1 to 7-2.
Insert a slit 12 several centimeters in length (in this case, cutting the cooling water pipe 8 at the same time will not be a problem), cut the stave mounting bolt 9, push the cooling water pipe 8 from outside the furnace with a small-capacity hydraulic machine, and remove the stave. 3 is peeled off from the steel shell 2 and efficiently dropped into the furnace to be removed.
第２図において１０は本発明を実施するための
移動式の作業床である。 In FIG. 2, numeral 10 is a movable work floor for carrying out the present invention.
なお、この発明は上記実施例に限定されるもの
でなく、種々の応用改変が可能なことは勿論であ
る。例えばスリツトは酸素アーク切断の他にプラ
ズマ切断、レーザー切断、ガス切断あるいはカツ
ター切断によつても形成し得るものであり、要は
高速でかつスリツトを入れる際に保護管が加熱さ
れ若干膨張し、経時冷却による収縮によつてガス
シール金物の充填耐火材と保護管の間に空隙が形
成されるようなスリツト形成手段であれば良い。
またこれに急冷手段を併用しても良い。 It should be noted that the present invention is not limited to the above-mentioned embodiments, and it goes without saying that various applications and modifications are possible. For example, slits can be formed not only by oxygen arc cutting but also by plasma cutting, laser cutting, gas cutting, or cutter cutting.The key is to cut the slits at high speed, and when cutting the slits, the protective tube is heated and expands slightly. Any slit forming means may be used as long as a gap is formed between the protective tube and the refractory material filled in the gas seal metal fittings due to contraction due to cooling over time.
Further, a rapid cooling means may be used in combination with this.
（発明の効果）
以上の説明から明らかなように、本発明によれ
ば、高炉内壁としてのステーブの取外しを迅速に
そして確実且つ容易にでき又、省力化もでき、取
外しコストも低減できる。又所望によつては高炉
操業中においても行うことも可能なものである。
そして僅かの押出力によりステーブの取外しを行
い得るので、鉄皮には歪や亀裂等の損傷を与え
ず、その後の高炉の操業の不都合を及ぼす虞れも
なく、ガスシール金物の再使用ができ、労力と余
分な費用を削減し得るという効果を奏するもので
ある。(Effects of the Invention) As is clear from the above description, according to the present invention, the stave as the inner wall of the blast furnace can be quickly, reliably, and easily removed, labor can be saved, and the removal cost can be reduced. Furthermore, if desired, it is also possible to carry out the process during blast furnace operation.
Since the stave can be removed with a small pushing force, the gas seal hardware can be reused without causing damage such as distortion or cracks to the steel shell, and without causing any inconvenience to subsequent blast furnace operations. This has the effect of reducing labor and extra costs.
第１図は、本発明を実施する高炉の縦断面説明
図、第２図は本発明で取外し対象となる第１図Ａ
部のステーブの一例を示す拡大断面説明図、第３
図は第２図のステーブの正面説明図、第４図は本
発明におけるスリツト形成状態を示すステーブの
断面説明図で第２図のＢ部拡大図、第５図は第４
図におけるスリツトを形成した保護管及び冷却水
管の断面説明図である。
１……高炉、２……鉄皮、３……ステーブ、
４，５，６，７……保護管、８……冷却水管、９
……ステーブ取付ボルト、１０……移動式作業
床。
Fig. 1 is an explanatory longitudinal cross-sectional view of a blast furnace in which the present invention is implemented, and Fig. 2 is the Fig. 1 A that is to be removed in the present invention.
Expanded cross-sectional explanatory diagram showing an example of the stave of the section, Part 3
The figure is an explanatory front view of the stave in Fig. 2, Fig. 4 is an explanatory cross-sectional view of the stave showing the state of slit formation in the present invention, and is an enlarged view of part B in Fig. 2, and Fig. 5 is an explanatory view of the stave in the fourth embodiment.
FIG. 2 is an explanatory cross-sectional view of a protective tube and a cooling water pipe in which slits are formed in the figure. 1... Blast furnace, 2... Iron skin, 3... Stave,
4, 5, 6, 7...protection pipe, 8...cooling water pipe, 9
...Stave mounting bolt, 10...Movable work floor.
Claims (1)
の充填耐火材と接するステーブ保護管にスリツト
を切り込み、前記充填耐火材と保護管の間に微細
な空隙を形成せしめ鉄皮内壁ステーブの移動を容
易にして外力を付与し、ステーブを剥離除去する
ことを特徴とする高炉ステーブの取外し工法。1. Cut a slit in the stave protection tube that is in contact with the filled refractory material of the gas seal fitting provided on the outer surface of the blast furnace steel shell, and form a minute gap between the filled refractory material and the protection tube to prevent movement of the stave on the inner wall of the steel shell. A blast furnace stave removal method characterized by easily applying an external force to peel and remove the stave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2123787A JPS63190109A (en) | 1987-01-31 | 1987-01-31 | Method for removal working of stave in blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2123787A JPS63190109A (en) | 1987-01-31 | 1987-01-31 | Method for removal working of stave in blast furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63190109A JPS63190109A (en) | 1988-08-05 |
| JPH044365B2 true JPH044365B2 (en) | 1992-01-28 |
Family
ID=12049439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2123787A Granted JPS63190109A (en) | 1987-01-31 | 1987-01-31 | Method for removal working of stave in blast furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63190109A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0663011B2 (en) * | 1989-09-05 | 1994-08-17 | 住友金属工業株式会社 | Stave cooler for new blast furnace |
| KR20130065648A (en) * | 2010-03-30 | 2013-06-19 | 베리 메탈 컴패니 | Apparatus and method for gas tight secondary stave support |
-
1987
- 1987-01-31 JP JP2123787A patent/JPS63190109A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63190109A (en) | 1988-08-05 |
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