JPS6036444B2 - Blast furnace wall repair method - Google Patents
Blast furnace wall repair methodInfo
- Publication number
- JPS6036444B2 JPS6036444B2 JP507382A JP507382A JPS6036444B2 JP S6036444 B2 JPS6036444 B2 JP S6036444B2 JP 507382 A JP507382 A JP 507382A JP 507382 A JP507382 A JP 507382A JP S6036444 B2 JPS6036444 B2 JP S6036444B2
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- stave
- blast furnace
- cooler
- furnace wall
- 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
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】
この発明は高炉炉壁の損傷部を取替式ステーフクーラー
を取付けることによって補修する方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for repairing a damaged section of a blast furnace wall by installing a replaceable staple cooler.
高炉の炉代末期において、炉内の煉瓦が脱落した部分は
炉内プロフィルがくずれるため、ここで原料の均一な降
下が乱されて最適な操業が維持できなくなったり、鉄皮
が赤熱して危険な状態になるため、出銑量を規定より下
げて操業せざるを得ない場合が多い。At the end of a blast furnace's life, the furnace profile collapses in areas where bricks have fallen off, disrupting the uniform descent of raw materials and making it impossible to maintain optimal operation, or causing the steel shell to become red hot, creating a dangerous situation. As a result, it is often necessary to operate with a lower pig iron tap amount than specified.
このため従来は高炉休風時に炉内側に不定形耐火物を吹
付けたり、前もって焼成した耐火物板を炉肉側に取付け
たり、あるいは炉外側ら不定形耐火物を圧入したりして
プロフィルの維持及び銑皮の保護に努めてきた。しかし
ながらこの様な対策では耐火物の耐久性の限度から長期
間にわたって目的を維持することができず、補修善工事
を繰返しながら操業を続けていた。この発明は、上記の
事情に鑑みてなされたもので、その目的とするところは
、炉代末期の高炉において、炉内プロフィルの維持及び
鉄皮の保護を長期間にわたって確保できる取替式ステー
ブクーラーの取付けによる炉墜補修方法にある。そして
、その要旨とするところは休風時に炉内側の煉瓦脱落部
に高温条件下での耐摩耗性にすぐれた取替式ステーブク
ーラーを、チェーン及び炉外からそう入するガイドパイ
プで鉄皮に固定し、その後に当該ステープクーラー背面
と煉瓦面との間に不定形耐火物を圧入することによって
炉内ガスが当該ステーブ背面を抜けることがない様に配
慮し、長期間にわたって炉内プロフィルの維持及び鉄皮
の保護を確保できることを特徴とする炉墜補修方法にあ
る。以下に、この発明を図示の一実施例に基づいて説明
する。For this reason, conventional methods have been used to improve the profile by spraying monolithic refractories onto the inside of the blast furnace, attaching pre-fired refractory plates to the furnace meat side, or press-fitting monolithic refractories from the outside of the blast furnace. Efforts have been made to maintain and protect the pig skin. However, with these measures, it was not possible to maintain the purpose for a long period of time due to the limited durability of the refractories, and the plant continued to operate with repeated repair work. This invention was made in view of the above circumstances, and its purpose is to provide a replaceable stave cooler that can maintain the furnace profile and protect the shell over a long period of time in a blast furnace at the end of its life. There is a method for repairing a reactor crash by installing. The gist of this is that a replaceable stave cooler, which has excellent wear resistance under high temperature conditions, is installed at the part where bricks fall off inside the furnace during wind breaks, and is attached to the steel shell using a chain and a guide pipe that is inserted from outside the furnace. By fixing the stave and then press-fitting a monolithic refractory between the back of the stave and the brick surface, consideration was given to preventing the furnace gas from escaping through the back of the stave, and maintaining the furnace profile over a long period of time. and a method for repairing a furnace crash, which is characterized by ensuring protection of the iron shell. The present invention will be explained below based on an illustrated embodiment.
第1図において、1は炉代初期からの煉瓦頭構成で、そ
の炉内面にプロフィールは炉代末期には図示の如く損耗
、脱落しているのが一般的である。2は炉代初期からの
ステーブクーラ−を示し、3は高炉鉄皮である。In FIG. 1, numeral 1 shows a brick head structure from the early stage of the furnace age, and the profile on the inner surface of the furnace is generally worn out and fallen off as shown in the figure at the end of the furnace age. 2 shows a stave cooler from the early furnace age, and 3 is a blast furnace shell.
第1図はこの状態に取替式ステーブクーラー4を炉内よ
り取付けた場合を示す。当該4には固定用チェーン5が
前もって取付けられており、ステーブクーラーの冷却水
を通す配管7と炉内からの奪熱量を抑制するための煉瓦
8が鋳込まれている。冷却配管が鉄皮を貫通する穴の数
を最小限にとどめる様冷却配管本数及び配管曲げ形状を
選定する。また、炉内への取込に際しては極力、軽量、
4・型化をはかることによって炉内での取付作業の容易
化をすすめる必要がある。本例ではステーブク−ラーの
肉厚を薄くすることにより、取付時の隣接ステーブクー
ラーとの干渉の度合を軽減させ、取付を容易にできる様
配慮している。また冷却配管が突出た状態ではステーブ
クーラーを炉内に取込む際に困難を生ずることがある。
この様な場合には第2図に示す如く、フレキシブルホー
ス10を用い、炉外側から保護管11をそう入し、保護
管11とフレキシブルホース10の間に不定形耐火物を
圧入する方式をとることもできる。ステーブクーラー取
付時には炉外より既設鉄皮及び煉瓦にボーリングし、配
管7及びガイドパイプ6が貫通できる様にする。FIG. 1 shows a case where a replaceable stave cooler 4 is installed from inside the furnace in this state. A fixing chain 5 is attached in advance to the 4, and a pipe 7 for passing cooling water of the stave cooler and a brick 8 for suppressing the amount of heat taken from inside the furnace are cast. Select the number of cooling pipes and the shape of the pipe bends to minimize the number of holes through which the cooling pipes penetrate the steel shell. In addition, when taking it into the furnace, we make sure that it is as light and lightweight as possible.
4. It is necessary to make the installation work inside the furnace easier by creating a mold. In this example, by reducing the wall thickness of the stave cooler, consideration has been given to reducing the degree of interference with adjacent stave coolers during installation and facilitating installation. In addition, when the cooling pipe protrudes, it may be difficult to take the stave cooler into the furnace.
In such a case, as shown in Fig. 2, a method is used in which a flexible hose 10 is used, a protective tube 11 is inserted from the outside of the furnace, and a monolithic refractory is press-fitted between the protective tube 11 and the flexible hose 10. You can also do that. When installing the stave cooler, the existing steel shell and bricks are bored from outside the furnace so that the piping 7 and guide pipe 6 can penetrate.
ガイドパイプ用貫通穴よりチェーン5を炉外に引出し、
ガイドパイプ6を所定の長さにセットして鉄皮に取付け
、チェーン5を緊張固定して取替式ステープクーラー4
を固定する。しかるのち配管7と鉄皮3に設けた配起用
穴とのすきまを溶接で密閉する。この後に取替式ステー
ブクーラー4の背面と既設煉瓦前面との間に不定形耐火
物9を炉外側より耐火物充填孔12を介して圧入充填し
、操業時の高温ガスがステーブクーラー背面を流れて配
管及びガイドパイプを損傷しないようにする。この作業
を同じ高さのステーブクーラ−について行ない、全周に
わたって取付けるようにする。炉内側煉瓦の損耗範囲が
一段のステーブクーラ−で被いきれない場合には二段な
いし三段にわたって当該ステープクーラーを取付けるこ
ととする。この様にして全周にわたって当該ステープク
−ラ−を取付けることにより、炉代末期のくずれた煉瓦
プロフィルがステーブクーラー前面プロフィルにおきか
えられ、安定操業の基本条件である炉内原料の均一降下
を得ることが可能になる。Pull the chain 5 out of the furnace through the guide pipe through hole,
Set the guide pipe 6 to a predetermined length and attach it to the steel shell, tighten the chain 5, and install the replaceable staple cooler 4.
to be fixed. Thereafter, the gap between the piping 7 and the mounting hole provided in the steel shell 3 is sealed by welding. After this, a monolithic refractory 9 is press-filled between the back of the replaceable stave cooler 4 and the front of the existing brick from the outside of the furnace through the refractory filling hole 12, and high-temperature gas during operation flows through the back of the stave cooler. to prevent damage to piping and guide pipes. Perform this work on the stave coolers at the same height so that they are installed all around the circumference. If the area of wear and tear on the bricks inside the furnace cannot be covered by one stage of stave coolers, two or three stages of stave coolers will be installed. By installing the stave cooler all around the circumference in this way, the collapsed brick profile at the end of the furnace age is replaced with the stave cooler front profile, and the uniform fall of the raw material in the furnace, which is a basic condition for stable operation, can be achieved. becomes possible.
また、高温の炉内容物はステーブクーラ−でさえぎられ
、その背面の耐火物の断熱効果もあって、鉄皮の赤熱現
象は解消できる。ステーブクーラーの高温条件下でのす
ぐれた耐摩耗性は多くの高炉で実証されており、本方式
による場合も従来法に比べ、はるかにすぐれた耐久性を
期待できるものである。この発明は、以上説明したよう
に高温条件下での耐摩耗性にすぐれたステーブクーラー
を高炉内煉瓦の脱落部に取付けることにより、炉内プロ
フィルを健全に維持して原料が均一に降下する様にした
から、鉄皮の保護効果と相まって炉代末期の操業を長期
間にわたって安定させることができる。In addition, the high-temperature furnace contents are blocked by the stave cooler, and the heat-insulating effect of the refractory on the back side of the stave cooler eliminates the red-hot phenomenon of the iron skin. The excellent wear resistance of stave coolers under high-temperature conditions has been demonstrated in many blast furnaces, and this method can also be expected to have far superior durability compared to conventional methods. As explained above, by attaching a stave cooler with excellent wear resistance under high temperature conditions to the fallen part of the bricks in the blast furnace, the furnace profile can be maintained in a healthy manner so that the raw materials can descend uniformly. This, combined with the protective effect of the iron shell, makes it possible to stabilize the operation for a long period of time at the end of the furnace life.
という極めてすぐれた効果を奏する。This has an extremely excellent effect.
図面はこの発明に係る実施例を示すもので、第1図は高
炉壁の縦断面図であり、第2図は冷却配管の一部にフレ
キシブルホースを使用した例を示す。
1・・・・・・炉代初期からの煉瓦損構成、2・・・・
・・炉代初期からのステーブクーラー、3・・・・・・
高炉鉄皮、4・・・・・・取替式ステープクーラー、5
・・・・・・固定用チェーン、6・・・…ガイドパイプ
、7・・…・冷却配管、8・・・・・・銭込煉瓦、9・
・・・・・不定形圧入耐火物、10・・…・フレキシブ
ルホース、11・・・・・・保護管、12・・・・・・
不定形耐火物充填孔。
第1図
第2図The drawings show an embodiment of the present invention; FIG. 1 is a longitudinal sectional view of a blast furnace wall, and FIG. 2 shows an example in which a flexible hose is used as a part of the cooling piping. 1... Brick loss composition from the early stage of furnace life, 2...
・・Stave cooler from the early days of the furnace, 3...
Blast furnace shell, 4... Replaceable staple cooler, 5
...Fixing chain, 6... Guide pipe, 7... Cooling pipe, 8... Zenigome brick, 9.
..... Monolithic press-fit refractories, 10 ..... flexible hoses, 11 ..... protection tubes, 12 .....
Monolithic refractory filling hole. Figure 1 Figure 2
Claims (1)
補修を行なうに際し、炉内装入物を炉壁補修部以下まで
減尺して休風した後、炉頂開口部から取替式ステーブク
ーラーを垂下して炉壁補修部に取付け、取替式ステーブ
クーラー背面と炉内煉瓦前面との間に耐火物充填孔を介
し炉外から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. In a blast furnace at the end of its life, when bricks in the furnace fell off and damaged parts were repaired, the contents inside the furnace were reduced to below the repaired part of the furnace wall and after the air was rested, a replaceable stave was removed from the top opening of the furnace. A blast furnace characterized in that the cooler is hung down and attached to a repaired part of the furnace wall, and monolithic refractories are press-filled from outside the furnace through a refractory filling hole between the back of the replaceable stave cooler and the front of the bricks in the furnace. Furnace wall repair method.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP507382A JPS6036444B2 (en) | 1982-01-18 | 1982-01-18 | Blast furnace wall repair method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP507382A JPS6036444B2 (en) | 1982-01-18 | 1982-01-18 | Blast furnace wall repair method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS58123804A JPS58123804A (en) | 1983-07-23 |
JPS6036444B2 true JPS6036444B2 (en) | 1985-08-20 |
Family
ID=11601205
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP507382A Expired JPS6036444B2 (en) | 1982-01-18 | 1982-01-18 | Blast furnace wall repair method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6036444B2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60184608A (en) * | 1984-02-29 | 1985-09-20 | Sumitomo Metal Ind Ltd | Repairing method of furnace wall of blast furnace |
JPS61170506A (en) * | 1985-01-22 | 1986-08-01 | Kawasaki Steel Corp | Method for protecting blast furnace mouth shell |
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 |
-
1982
- 1982-01-18 JP JP507382A patent/JPS6036444B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS58123804A (en) | 1983-07-23 |
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