JPS6116402B2 - - Google Patents
Info
- Publication number
- JPS6116402B2 JPS6116402B2 JP10930383A JP10930383A JPS6116402B2 JP S6116402 B2 JPS6116402 B2 JP S6116402B2 JP 10930383 A JP10930383 A JP 10930383A JP 10930383 A JP10930383 A JP 10930383A JP S6116402 B2 JPS6116402 B2 JP S6116402B2
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- shell
- cooling plate
- steel shell
- press
- 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
- 238000001816 cooling Methods 0.000 claims description 34
- 229910000831 Steel Inorganic materials 0.000 claims description 25
- 239000010959 steel Substances 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 9
- 239000011823 monolithic refractory Substances 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 20
- 239000011449 brick Substances 0.000 description 16
- 239000000463 material Substances 0.000 description 13
- 239000011819 refractory material Substances 0.000 description 11
- 229910052742 iron Inorganic materials 0.000 description 10
- 238000005507 spraying Methods 0.000 description 10
- 239000007921 spray Substances 0.000 description 3
- 239000000571 coke Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 210000001015 abdomen Anatomy 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Blast Furnaces (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Description
【発明の詳細な説明】
本発明は高炉炉壁の損耗部の補修方法に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for repairing a worn portion of a blast furnace wall.
高炉の内張耐火物は、装入物の降下による摩耗
の外、炉内の熱負荷変動、浸食性ガスアタツクに
より、亀裂、剥離を生じ損耗消失しやすい。この
ため、プロフイルが著しく不均一となり、コーク
スと焼結鉱の混合層が発生し、又炉内還元ガスの
流路も不均一となり、操業上大きな問題となる。
更に、鉄皮にホツトスポツトを生じ変形・亀裂発
生の原因となり、炉体寿命を短縮させる大きな問
題でもある。 The refractory lining of a blast furnace is prone to cracking, peeling, and wear and tear due to not only wear due to falling charges, but also heat load fluctuations within the furnace and erosive gas attack. As a result, the profile becomes extremely non-uniform, a mixed layer of coke and sintered ore is generated, and the flow path of the reducing gas in the furnace also becomes non-uniform, which poses a major operational problem.
Furthermore, hot spots are generated in the steel shell, causing deformation and cracking, which is a major problem that shortens the life of the furnace body.
従来、ステーブ高炉ではシヤフト上部のレンガ
積部において、残存レンガ耐火物の前面に炉内か
ら不定形耐火物を吹付けたり、残存レンガ耐火物
の面前に、焼成耐火板やステーブクーラー等を取
付け、残存レンガ耐火物凹凸面と該焼成耐火板や
ステーブクーラー背面との空隙部に炉外から圧入
口を介して不定形耐火材を圧入・充填する方法が
ある。又、冷却盤高炉でも、シヤフト部全域、更
には炉腹部に対して上述の如き対策・方法がとら
れてきた。 Conventionally, in the stave blast furnace, in the brick masonry section at the top of the shaft, monolithic refractories were sprayed from within the furnace in front of the remaining brick refractories, and baked refractory plates, stave coolers, etc. were installed in front of the remaining brick refractories. There is a method of press-fitting and filling the void between the uneven surface of the remaining brick refractory and the fired refractory plate or the back of the stave cooler with an unshaped refractory material from outside the furnace through an injection port. In addition, in cooling plate blast furnaces, the above-mentioned measures and methods have been taken for the entire shaft section and further for the furnace belly.
しかし、炉内からの不定形耐火物の吹付けは、
耐久性が短かく吹付け頻度が大きくなること、吹
付厚みにはおのずから限界があることから改善が
望まれている。残存レンガ耐火物の前面に焼成耐
火板やステーブクーラー等を取付ける方法は、残
存レンガ凹凸上面の耐火物や付着物を巻込んだま
ま圧入が行われ、残存レンガ凹凸面と焼成耐火板
やステーブクーラー背面との空隙部は、不純物、
異物を巻込んだ圧入・充填層となるため、緻密な
気孔率の低い性状のものは得られにくく耐久性に
欠点があり、操業中この圧入充填部に裏風が通り
やすい。 However, spraying monolithic refractories from inside the furnace
Improvements are desired because the durability is short and the spraying frequency is increased, and there is a natural limit to the spraying thickness. The method of attaching a fired refractory plate or stave cooler to the front of the remaining brick refractories is to press fit the refractories and deposits on the uneven top surface of the remaining bricks, and then press-fit the fired refractory plate or stave cooler to the front of the remaining brick refractories. The gap between the back and the back is filled with impurities,
Since it is a press-fitted and packed bed that contains foreign matter, it is difficult to obtain a dense, low-porosity product, which has shortcomings in durability, and back wind tends to pass through the press-fitted part during operation.
本発明は、上記のような欠点を解消するもの
で、炉壁損傷部の残存レンガ、耐火材を除去し鉄
皮を露出させたのち、例えば薄型のステーブ型冷
却板の様な鉄皮保護型冷却板を取付け、該鉄皮保
護型冷却板群の目地部及び端部に、炉内より不定
形耐火材を吹付け圧入材の漏洩防止を行つた後、
炉外から不定形耐火材を圧入・充填することによ
り、耐久性を向上し、長期間にわたつて炉内プロ
フイルの維持及び鉄皮の断熱保護を行う炉体の補
修方法である。 The present invention solves the above-mentioned drawbacks, and after removing the remaining bricks and refractory materials from the damaged part of the furnace wall and exposing the steel shell, it is possible to install a protective type of steel shell, such as a thin stave-type cooling plate, for example. After installing the cooling plate and spraying monolithic refractory material from inside the furnace to the joints and ends of the group of steel shell-protected cooling plates to prevent leakage of the press-fit material,
This is a furnace repair method that improves durability by press-fitting and filling monolithic refractory material from outside the furnace, maintaining the furnace profile over a long period of time, and providing insulation protection for the steel shell.
以下、本発明を図面に示す実施例に基づいて説
明する。 Hereinafter, the present invention will be explained based on embodiments shown in the drawings.
第１図は、高炉炉壁損傷部の残存レンガ、耐火
材を除去した後、鉄皮露出部３への鉄皮保護型冷
却板４の取付状況を示すもので、イ図はステーブ
高炉１における取付状況の１例を、ロ図は冷却盤
高炉２における取付状況の１例を示す。５はステ
ーブ、６は冷却盤、７は吹付ノズルである。 Figure 1 shows how the shell protection type cooling plate 4 is installed on the exposed steel shell part 3 after removing the remaining bricks and refractory material from the damaged part of the blast furnace wall. Figure 4 shows an example of the installation situation in the cooling plate blast furnace 2. 5 is a stave, 6 is a cooling plate, and 7 is a spray nozzle.
第２図は鉄皮保護型冷却板４の形状、構造及び
鉄皮への取付状態の１例を示す。本図は炉壁レン
ガ積部の残存レンガ８を除去して鉄皮を露出させ
た後、該鉄皮露出部３に鉄皮保護型冷却板４が取
付固定されている状態である。鉄皮保護型冷却板
４は、金物ブロツク９内に鋳込水冷配管１０を鋳
込み、前面にはプレキヤスト不定形耐火材１１及
びこれを支持するリブ１２、スタツド１３を備え
ている。寸法は炉頂開口部の大きさ以下であれば
よく、厚みは期待する寿命に応じて選定すればよ
い。（目安として３〜４年で約150mm）
鉄皮保護型冷却板４を炉壁損傷部に取付けるに
あたつては、残存レンガ８或いは炉内付着物が残
存し、後述する圧入・充填を緻密に行う上で支障
となるので、これらを除去して表面を平滑な状態
にしなければならない。第３図に残存レンガ８及
び炉内付着物１８を除去する装置を示す。この装
置は炉頂開孔部１４から炉内へ懸垂材２１によ
り、ビツトを先端に有するロツド１７及びこれを
支持するロツド用支持管１５を垂下せしめ、鉄皮
保護型冷却板４の取付予定部へ旋回操作ワイヤー
２２を操作し、旋回させる。該鉄皮保護型冷却板
４の取付予定部の前面にある残存レンガ８及び付
着物１８を、炉外に設置してある駆動装置２０に
よりロツド１７を介してビツト１６を打撃運動及
び回転運動させてこれらを除去し、平滑な鉄皮露
出部を得ることが可能である。しかる後、炉頂開
口部１４より鉄皮保護型冷却板を垂下せしめ、所
定のレベルまで降下させた後、鉄皮側へ引寄せ鉄
皮へ取付固定する。 FIG. 2 shows an example of the shape, structure, and state of attachment to the steel shell of the shell-protected cooling plate 4. This figure shows a state in which, after the remaining bricks 8 of the brickwork of the furnace wall have been removed to expose the iron skin, the iron skin protection type cooling plate 4 is attached and fixed to the exposed iron skin part 3. The steel shell protection type cooling plate 4 has a cast-in water cooling pipe 10 cast into a metal block 9, and is provided with a precast monolithic refractory material 11, ribs 12, and studs 13 for supporting the same on the front surface. The dimensions may be smaller than the size of the furnace top opening, and the thickness may be selected depending on the expected lifespan. (Approximately 150 mm in 3 to 4 years as a guide) When installing the shell-protected cooling plate 4 to the damaged part of the furnace wall, the remaining bricks 8 or the deposits inside the furnace remain, and the press-fitting and filling described below must be done carefully. Since they are a hindrance to the process, it is necessary to remove them to make the surface smooth. FIG. 3 shows an apparatus for removing the remaining bricks 8 and the deposits 18 inside the furnace. In this device, a rod 17 having a bit at the tip and a support tube 15 for the rod are suspended from a furnace top opening 14 into the furnace by a suspension member 21, and a rod 17 having a bit at the tip and a support tube 15 for the rod are suspended from the furnace top opening 14 into the furnace, and the rod 17 is suspended from the furnace top opening 14 into the furnace. Operate the turning operation wire 22 to turn. The remaining bricks 8 and deposits 18 on the front surface of the part where the steel skin protection type cooling plate 4 is to be installed are moved by impact movement and rotational movement of the bits 16 via rods 17 by a drive device 20 installed outside the furnace. It is possible to remove these and obtain a smooth exposed part of the iron skin. Thereafter, the shell protection type cooling plate is suspended from the furnace top opening 14, lowered to a predetermined level, and then pulled toward the steel shell and attached and fixed to the steel shell.
次に第４図に鉄皮保護型冷却板の背面の裏風を
防止するため、不定形耐火材を圧入・充填する
が、その圧入材の漏洩防止のため鉄皮保護型冷却
板群の目地部及び端部を吹付ける、シール方法を
示す。取付部位に鉄皮保護型冷却板４群を取付固
定した状態で、図に示す如く端部の端部シールプ
レート２６及び目地部の目地部重合せプレート２
７の個所に、炉内から吹付ノズル７により不定形
耐火材を吹付けて圧入材の漏洩防止をはかつた
後、鉄皮２４に取付けられた圧入口２５を介して
不定形耐火材の圧入材２８を圧入する。 Next, as shown in Figure 4, in order to prevent the rear wind from blowing on the back side of the steel shell-protected cooling plates, a monolithic refractory material is press-fitted and filled.In order to prevent leakage of the press-fitted material, the joints of the steel-shell-protected cooling plate group are The sealing method is shown by spraying the parts and ends. With the four groups of iron skin protection type cooling plates installed and fixed at the installation site, the end seal plate 26 at the end and the joint overlapping plate 2 at the joint are installed as shown in the figure.
After spraying the unshaped refractory material from inside the furnace using the spray nozzle 7 to prevent leakage of the press-in material, the unshaped refractory material is press-fitted through the injection port 25 attached to the steel shell 24. Press fit the material 28.
この様にして炉壁補修部の全域にわたつて、こ
れまで述べた方法により鉄皮保護型冷却板を取付
ければ鉄皮は確実に長期間にわたつて断熱保護さ
れ鉄皮のホツトスポツト、変形、亀裂は未然に防
止され高炉炉体を健全な状態に維持し、安定した
操業を継続できる。 In this way, by installing the shell-protected cooling plate over the entire area of the furnace wall repaired area using the method described above, the shell will be reliably protected from heat for a long period of time, preventing hot spots, deformation, and Cracks are prevented, the blast furnace body is maintained in a healthy condition, and stable operations can continue.
以上本発明によれば、高炉の炉壁補修部に対し
て残存レンガ、付着物を除去し、炉内鉄皮露出部
に鉄皮保護型冷却板を取付け、鉄皮を鉄皮保護型
冷却板背面との空隙に不定形耐火材を圧入するこ
とにより、鉄皮の断熱保護が確実に長期間にわた
つて可能となる外に、炉内プロフイルの復元が得
られコークスと焼結鉱の混合層の発生も防止でき
るので、より安定した操業を行うことができる。 As described above, according to the present invention, residual bricks and deposits are removed from the repaired part of the furnace wall of a blast furnace, a steel shell protection type cooling plate is attached to the exposed part of the steel shell in the furnace, and the steel shell is replaced with the steel shell protection type cooling plate. By press-fitting the amorphous refractory material into the gap between the back surface and the back surface, not only can the heat insulation protection of the steel shell be ensured for a long period of time, but also the furnace profile can be restored and a mixed layer of coke and sintered ore can be created. It is also possible to prevent the occurrence of , so more stable operations can be performed.
又鉄皮保護型冷却板が損耗を始めた場合は、熱
間吹付補修装置により吹付補修を行うが、このと
きそのリブ部が吹付材の支持具となり、吹付材の
付着率及び耐久性を向上する。鉄皮保護型冷却板
が再損耗した場合は、これを炉外から取外し再び
新規鉄皮保護型冷却板を取付けることもできるの
で、この部分の鉄皮は半永久的に継続して使用す
ることも可能である。 In addition, if the steel skin protection type cooling plate starts to wear out, it will be repaired by spraying using a hot spraying repair device, and at this time, the ribs will serve as a support for the spraying material, improving the adhesion rate and durability of the spraying material. do. If the shell-protected cooling plate becomes worn out again, it can be removed from the outside of the furnace and a new shell-protected cooling plate can be reinstalled, so this part of the steel shell can be used semi-permanently. It is possible.
以上の様に本発明は種々のすぐれた結果を発揮
することができ、鉄皮の健全性の維持のみなら
ず、操業においても安定した稼動を長期間にわた
り維持することができる。 As described above, the present invention can exhibit various excellent results, and can not only maintain the soundness of the iron shell but also maintain stable operation over a long period of time.
第１図イ，ロは、高炉炉壁損傷部への鉄皮保護
型冷却板の取付状況を示し、イはステーブ高炉の
例、ロは冷却板高炉の例を示す。第２図イ，ロは
鉄皮保護型冷却板の形状、構造、取付状況を示す
平面図と断面図である。第３図は鉄皮残存レンガ
及び付着物の除去装置を示す。第４図は鉄皮保護
型冷却板の背面圧入及び圧入材の漏洩防止手段を
示す断面図である。
１……ステーブ高炉、２……冷却板高炉、３…
…鉄皮露出部、４……鉄皮保護型冷却板、５……
ステーブ、６……冷却盤、７……吹付ノズル、８
……残存レンガ、９……金物ブロツク、１０……
鋳込水冷配管、１１……プレキヤスト不定形耐火
材、１２……リブ、１３……スタツド、１４……
炉頂開口部、１５……ロツド用支持管、１６……
ビツト、１７……ロツド、１８……付着物、１９
……減尺レベル、２０……駆動装置、２１……懸
垂材、２２……旋回操作ワイヤー、２３……支持
梁、２４……鉄皮、２５……圧入口、２６……端
部シールプレート、２７……目地部重合せプレー
ト、２８……圧入材。
Figures 1A and 1B show how a shell-protecting cooling plate is attached to a damaged part of the blast furnace wall, where A shows an example of a stave blast furnace and B shows an example of a cooling plate blast furnace. Figures 2A and 2B are a plan view and a cross-sectional view showing the shape, structure, and mounting situation of the iron skin protection type cooling plate. Figure 3 shows the equipment for removing bricks remaining in the iron shell and deposits. FIG. 4 is a cross-sectional view showing the rear press-fitting of the iron skin protection type cooling plate and the means for preventing leakage of the press-fitting material. 1...Stave blast furnace, 2...Cooling plate blast furnace, 3...
...Exposed steel skin part, 4...Skin protection type cooling plate, 5...
Stave, 6... Cooling plate, 7... Spray nozzle, 8
...Remaining bricks, 9...Hardware blocks, 10...
Cast water cooling piping, 11... Precast monolithic refractory material, 12... Rib, 13... Stud, 14...
Furnace top opening, 15... Rod support tube, 16...
bit, 17... rod, 18... attachment, 19
... Reduction level, 20 ... Drive device, 21 ... Suspension member, 22 ... Swivel operation wire, 23 ... Support beam, 24 ... Iron shell, 25 ... Pressure port, 26 ... End seal plate , 27... Joint overlapping plate, 28... Press-fitting material.
Claims (1)
炉壁を補修するに際して、補修部の鉄皮裏面の残
存耐火物を除去して鉄皮裏面を露出させ、該鉄皮
露出部に鉄皮保護用冷却板を配設固定し、炉内面
から該鉄皮保護用冷却板群の目地部及び端部を不
定形耐火物で吹付成形するとともに、炉外の鉄皮
表面から圧入口を介し鉄皮保護型冷却板と鉄皮裏
面との空隙に不定形耐火物を圧入充填することを
特徴とする高炉炉壁補修方法。1 When repairing the furnace wall by reducing the size of the charge below the blast furnace wall repair section, remove the remaining refractory on the back side of the shell of the repaired section to expose the back surface of the shell, and A cooling plate for protecting the steel shell is installed and fixed in the section, and the joints and ends of the group of cooling plates for protecting the steel shell are spray-formed with monolithic refractories from the inside of the furnace, and pressure is applied from the surface of the steel shell outside the furnace. A blast furnace wall repair method characterized by press-filling a monolithic refractory into the gap between a shell-protected cooling plate and the back surface of the steel shell through an inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10930383A JPS602607A (en) | 1983-06-20 | 1983-06-20 | Repairing method of blast furnace wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10930383A JPS602607A (en) | 1983-06-20 | 1983-06-20 | Repairing method of blast furnace wall |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS602607A JPS602607A (en) | 1985-01-08 |
| JPS6116402B2 true JPS6116402B2 (en) | 1986-04-30 |
Family
ID=14506767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10930383A Granted JPS602607A (en) | 1983-06-20 | 1983-06-20 | Repairing method of blast furnace wall |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS602607A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0541102Y2 (en) * | 1988-12-20 | 1993-10-18 |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0742492B2 (en) * | 1987-09-08 | 1995-05-10 | 住友金属工業株式会社 | Repair method for stave cooler wear part on stave furnace wall of blast furnace |
| JPH0257626A (en) * | 1988-08-22 | 1990-02-27 | Nkk Corp | Method for repairing furnace wall in blast furnace |
| JPH0663013B2 (en) * | 1988-10-19 | 1994-08-17 | 住友金属工業株式会社 | Stave type blast furnace repair method |
| KR100825637B1 (en) * | 2001-11-21 | 2008-04-25 | 주식회사 포스코 | A cooler for the end of life type in furnace |
| KR100971984B1 (en) | 2003-06-27 | 2010-07-23 | 주식회사 포스코 | Method for repairing the refractory of stave type blast furnace |
-
1983
- 1983-06-20 JP JP10930383A patent/JPS602607A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0541102Y2 (en) * | 1988-12-20 | 1993-10-18 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS602607A (en) | 1985-01-08 |
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