JPS6116403B2 - - Google Patents
Info
- Publication number
- JPS6116403B2 JPS6116403B2 JP11188383A JP11188383A JPS6116403B2 JP S6116403 B2 JPS6116403 B2 JP S6116403B2 JP 11188383 A JP11188383 A JP 11188383A JP 11188383 A JP11188383 A JP 11188383A JP S6116403 B2 JPS6116403 B2 JP S6116403B2
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- cooling plate
- shell
- protecting
- cooling
- 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 50
- 229910000831 Steel Inorganic materials 0.000 claims description 34
- 239000010959 steel Substances 0.000 claims description 34
- 238000000034 method Methods 0.000 claims description 22
- 239000007921 spray Substances 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 239000011823 monolithic refractory Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims 1
- 230000008439 repair process Effects 0.000 description 17
- 238000005507 spraying Methods 0.000 description 8
- 239000011819 refractory material Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/10—Cooling; Devices therefor
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、高炉炉壁の補修に際し鉄皮保護用冷
却板を鉄皮露出部に取付ける場合に、鉄皮と該鉄
皮保護用冷却板との空隙を完全にシールした後炉
外の圧入口より泥状不定形耐火材を圧入・充てん
し炉内ガスの裏風の発生を防止する方法に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for completely sealing the gap between the steel shell and the cooling plate for protecting the shell when installing the cooling plate for protecting the shell on the exposed part of the shell during repair of the blast furnace wall. This relates to a method for preventing the generation of backflow of gas in the furnace by press-fitting and filling a muddy monolithic refractory material through an injection port outside the furnace.
従来行なわれている炉壁の補修方法は大別して
次の三つの方法に分けられる。 Conventional furnace wall repair methods can be broadly divided into the following three methods.
(A) 方式：高炉操業を完全に停止し炉体の冷却後
に従業員が炉内に入つて補修作業を行ない、耐
火物の乾燥昇熱完了後に操業を再現する。(A) Method: After the blast furnace operation is completely stopped and the furnace body has cooled, employees enter the furnace to perform repair work, and the operation is reproduced after the refractory has been dried and heated.
(B) 方式：高炉々壁の損傷部を外方から開口し、
この開口から圧入ノズルを挿入し、適当な粘度
の不定形耐火物を所要圧力で圧入後、乾燥固化
する（特開昭48−20702号公報）。(B) Method: Open the damaged parts of the blast furnace walls from the outside,
A press-fitting nozzle is inserted through this opening, and a monolithic refractory having an appropriate viscosity is press-fitted at a required pressure, and then dried and solidified (Japanese Patent Laid-Open No. 20702/1983).
(C) 方式：高炉操業を停止することなく、高炉装
入物を減尺後炉内に吹付装置を挿入し、炉内か
ら炉壁損傷部を吹付補修する（特公昭57−
14728号公報）
しかしながら、上記(A)方式は炉体の完全冷却を
待つて作業を行なうため、補修に長時間を要する
と共に悪環境による人体への影響が著しく、又高
炉操業の再開を順調に行なうことは困難であるな
どの工業的損失が極めて大きい欠点がある。(C) Method: Without stopping the blast furnace operation, a spraying device is inserted into the furnace after reducing the size of the blast furnace charge, and the damaged part of the furnace wall is sprayed from inside the furnace to repair it.
(No. 14728) However, method (A) requires a long period of time to perform repairs, as the work is carried out after the furnace body has completely cooled, and the adverse environment has a significant impact on the human body. It has the disadvantage that it is difficult to carry out and causes extremely large industrial losses.
また(B)方式は高炉操業を停止することなく、炉
壁補修を行なえる利点がある反面、健全な鉄皮を
開口して、外部から不定形耐火物を圧入する方式
であるが、炉壁損傷部の損傷状態、位置、その他
を正確に把握しなければ無駄な補修になる欠点を
有する。 In addition, method (B) has the advantage of being able to repair the furnace wall without stopping blast furnace operation, but on the other hand, the method involves opening a healthy shell and press-fitting monolithic refractories from the outside. This method has the disadvantage that repairs will be useless unless the state of damage, location, etc. of the damaged part are accurately grasped.
更に、(C)方式は高炉操業を停止することなく、
かつ熱間状態で短時間に目的とする補修部位を炉
内から吹付補修し、高炉装入物等不純な物質を混
合しない耐火物層のみが形成されるため、上記(B)
方式より効果は認められている。しかし、高炉炉
内壁は操業時高温（1200℃以上、）にさらされ、
また炉内ガス（アルカリ蒸気、ZnO、COガス）
との反応により吹付耐火物の損傷も進み高頻度で
吹付補修を実施せざるを得ない。 Furthermore, method (C) does not require stopping blast furnace operation.
In addition, the target repair area is sprayed from inside the furnace in a hot state in a short time, and only a refractory layer is formed without mixing impure substances such as blast furnace charge, so (B) is applied.
The effectiveness of the method has been recognized. However, the inner wall of the blast furnace is exposed to high temperatures (over 1200℃) during operation.
Furnace gas (alkali steam, ZnO, CO gas)
Due to the reaction, damage to the sprayed refractories also progresses, forcing frequent spraying repairs.
本発明者等は冷却盤式高炉において、上述した
既存の補修部方法の欠点を解決し、冷却盤取付孔
を利用した鉄皮保護用冷却板取付を行なうことで
更に長寿命可能な炉壁補修方法を開発した。上記
補修方法とは「高炉操業を停止することなく高炉
装入物を減尺休風後、熱間状態で鉄皮保護用冷却
板を炉頂部より炉内に挿入し、鉄皮露出部に取付
ける」ものである。 The present inventors have solved the above-mentioned drawbacks of the existing repair method for cooling plate type blast furnaces, and by installing a cooling plate for protecting the steel shell using the cooling plate mounting holes, the furnace wall can be repaired for a longer life. developed a method. The above repair method is to reduce the size of the blast furnace charge without stopping blast furnace operation, and then insert a cooling plate to protect the shell from the top of the furnace into the furnace while it is hot, and attach it to the exposed part of the shell. ” is a thing.
しかし、上記補修方法においては、鉄皮と鉄皮
保護用冷却板および鉄皮保護用冷却板群間の目地
部及び端部にすき間（30〜100m/m）が生じ、こ
の状態のままで送風を開始すると高温の炉内ガス
が鉄皮と鉄皮保護用冷却板との間に入り込み、鉄
皮赤熱、冷却板損傷脱落となり、補修目的の要を
なさない。 However, in the above repair method, gaps (30 to 100 m/m) are created at the joints and edges between the steel shell, the cooling plate for protecting the steel shell, and the group of cooling plates for protecting the steel shell. When starting, high-temperature gas in the furnace enters between the steel shell and the cooling plate for protecting the steel shell, causing the shell to become red hot and the cooling plate to be damaged and fall off, making it useless for repair purposes.
したがつて、本発明の目的とするところは、上
記補修方法において、鉄皮裏面に取付けられた鉄
皮保護用冷却板間のすき間を完全に耐火物で充填
し、高温炉内ガスの流入を防止し、鉄皮保護用冷
却板の鉄皮保護用効果を長期間（３〜５年）保持
させることにある。 Therefore, an object of the present invention is to completely fill the gap between the cooling plates for protecting the steel shell attached to the back side of the steel shell with refractory material in the above repair method to prevent the inflow of gas into the high temperature furnace. The objective is to prevent this and maintain the effect of the cooling plate for protecting the steel shell for a long period of time (3 to 5 years).
以下、本発明を図面に基づいて説明する。 Hereinafter, the present invention will be explained based on the drawings.
第１図は本発明の補修方法の全体概要を示すも
ので、図において１は高炉炉内吹付装置でマスト
２、吹付ノズル３を垂下している。鉄皮保護用冷
却板４は炉下部の鉄皮露出部５ａに取付けられて
いる。該冷却板４と鉄皮５とのすき間６に泥状耐
火物を圧入する圧入機９は、圧入ホース８を介し
て鉄皮５に設けられた圧入孔７に接続されてい
る。 FIG. 1 shows an overall outline of the repair method of the present invention. In the figure, 1 is a blast furnace in-furnace spraying device with a mast 2 and a spray nozzle 3 hanging down. The cooling plate 4 for protecting the steel shell is attached to the exposed steel shell portion 5a in the lower part of the furnace. A press-fitting machine 9 for press-fitting muddy refractories into the gap 6 between the cooling plate 4 and the steel shell 5 is connected to a press-fit hole 7 provided in the steel shell 5 via a press-fit hose 8.
第２図は鉄皮保護用冷却板４の鉄皮取付状況を
更に詳細に示すもので、既設冷却盤１１を取外し
後、その取付金物１７を利用し鉄皮保護用冷却板
４を炉内から取付け、フランジ１６にて固定され
る。該鉄皮保護用冷却板４は鋳鉄又は鋳鋼製で内
部に冷却パイプ１４が鋳込まれ、前面には耐火物
１３が100〜200mmプレキヤストしてある。又、鉄
皮保護用冷却板４の周囲には泥状耐火物流出防止
用のシールプレート１５，１５′を取付けてあ
る。鉄皮保護用冷却板４を鉄皮５に取付後、吹付
ノズル３より吹付材１８を吐出させながら該冷却
板４のシールプレート１５，１５′の周囲をシー
ルする。 Figure 2 shows the mounting situation of the steel shell protection cooling plate 4 in more detail. After removing the existing cooling board 11, use the mounting hardware 17 to remove the steel shell protection cooling plate 4 from inside the furnace. It is installed and fixed with the flange 16. The cooling plate 4 for protecting the iron skin is made of cast iron or cast steel, and has a cooling pipe 14 cast therein, and a refractory 13 of 100 to 200 mm precast on the front surface. Furthermore, seal plates 15 and 15' are attached around the cooling plate 4 for protecting the steel shell to prevent muddy refractories from flowing out. After attaching the cooling plate 4 for protecting the steel skin to the steel skin 5, the area around the seal plates 15, 15' of the cooling plate 4 is sealed while discharging the spray material 18 from the spray nozzle 3.
第３図は第２図の断面を示すものである。第４
図は鉄皮保護用冷却板のシール構造の他の例を示
すもので、第３図のシールプレートを耐熱性で可
縮性を有するシールパツキン１９に変えたもので
ある。 FIG. 3 shows a cross section of FIG. 2. Fourth
The figure shows another example of the seal structure of the cooling plate for protecting the steel skin, in which the seal plate shown in FIG. 3 is replaced with a heat-resistant and compressible seal packing 19.
次に本発明の鉄皮保護用冷却板のシール方法お
よび圧入方法について説明する。 Next, a method for sealing and a method for press-fitting the cold plate for protecting the steel shell of the present invention will be explained.
鉄皮保護用冷却板４の周囲にはあらかじめシー
ルプレート１５，１５′を取付けておく。このシ
ールプレート１５，１５′の組合せは鉄皮保護用
冷却板の取付枚数、組合せにより適宜変わりうる
ものである。鉄皮組合せ部のシールプレート１５
は、鉄皮と接した際鉄皮変型に追従して密着する
ように、薄鋼の（0.6mm）プレートとし、プレー
トには20〜20m/m間隔で切り込みを入れる。ま
た、冷却板４間の継ぎ部は0.6mmのプレートが重
なるよう重ね合せプレート１５′とする。このこ
とは鉄皮保護用冷却板間のすき間は約50mmである
ので吹付材１８が鉄皮５まで十分に充填されない
場合があるため、炉外からの泥状耐火物で均一に
充填した方が裏風の発生防止に効果があるからで
ある。一方、該冷却板間のすき間に、吹付材１８
が十分に緻密に吹付充てんされるようプレキヤス
ト部に、面取り部２０を与えておくことが大切で
ある。 Seal plates 15, 15' are installed in advance around the cooling plate 4 for protecting the iron skin. The combination of the seal plates 15, 15' can be changed as appropriate depending on the number and combination of the cooling plates for protecting the steel shell. Seal plate 15 of steel skin combination part
The plate is made of thin steel (0.6 mm) so that it follows the deformation of the steel shell when it comes into contact with the steel shell, and makes cuts in the plate at intervals of 20 to 20 m/m. Further, the joint between the cooling plates 4 is made into an overlapping plate 15' so that the plates overlap each other by 0.6 mm. This means that since the gap between the cooling plates for protecting the shell is approximately 50 mm, the spray material 18 may not be fully filled up to the shell 5, so it is better to fill it evenly with muddy refractories from outside the furnace. This is because it is effective in preventing the generation of back wind. On the other hand, in the gap between the cooling plates, spray material 18
It is important to provide the precast part with a chamfered part 20 so that it can be sprayed and filled sufficiently densely.
鉄皮露出部に所要数の冷却板４が固定されたら
炉内に挿入されている吹付装置１の吹付ノズル３
を冷却板４周囲に指向させ、通常の炉内吹付同様
耐火物を吹付けて付着させる。尚、この吹付作業
で注意することは上部にある冷却板上端部は吹付
しないでおいて、泥状耐火物を注入し、泥状耐火
物が冷却板背面にまんべんなく充填され上部冷却
板の上端からオーバーフローした後、最後に吹付
シールすることである。これは、圧入以前に全周
を吹付シールすると冷却板４と鉄皮５とのすき間
の空気が十分抜き出ないため、ち密な耐火物層を
形成できない恐れがあるためである。泥状耐火物
の圧入は取付した冷却板４の下部の圧入孔から順
次行なうことが望ましい。 After the required number of cooling plates 4 are fixed to the exposed part of the steel shell, the spray nozzle 3 of the spray device 1 inserted into the furnace
is directed around the cooling plate 4, and the refractory is sprayed and deposited in the same manner as in normal furnace spraying. Note that during this spraying work, do not spray the upper end of the upper cooling plate, and pour the muddy refractory so that the muddy refractory is evenly filled on the back of the cooling plate and starts from the top of the upper cooling plate. The final step is to spray seal after overflowing. This is because if the entire circumference is spray-sealed before press-fitting, the air in the gap between the cooling plate 4 and the steel skin 5 will not be sufficiently extracted, and there is a possibility that a dense refractory layer cannot be formed. It is desirable to press-in the muddy refractories sequentially from the press-in holes at the bottom of the attached cooling plate 4.
泥状耐火物が冷却板と鉄皮間に完全に充填され
ているか否かの判定は、泥状耐火物の冷却板４上
端からのオーバーフローで十分確認できる。本発
明者はこのことをあらかじめオフラインで確認し
ており、また実炉での補修結果も良好で、現在１
年経過しているが冷却板と鉄皮との間に炉内ガス
の流入は全く認められていない。 The overflow of the muddy refractory from the upper end of the cooling plate 4 can be sufficient to determine whether the space between the cooling plate and the steel shell is completely filled with the muddy refractory. The inventor has confirmed this in advance off-line, and the repair results in an actual furnace are also good, and currently 1
Although many years have passed, no gas has been observed to flow into the furnace between the cooling plate and the steel shell.
以上説明した如く本発明は鉄皮保護用冷却板を
鉄皮露出部に直接取付け、炉内ガス裏風発生を完
全に防止できるため本来のステーブ高炉と同様の
寿命が期待でき、冷却板式高炉の寿命延長に大き
く寄与している。更に本発明と従来の炉内からの
吹付補修を併用することによりその効果は大であ
る。 As explained above, in the present invention, the cooling plate for protecting the steel shell is directly attached to the exposed part of the steel shell, and the generation of gas backflow inside the furnace can be completely prevented, so the same life expectancy as the original stave blast furnace can be expected. It greatly contributes to extending lifespan. Furthermore, the effects of the present invention and the conventional spray repair from inside the furnace can be greatly improved.
第１図は本発明を説明するための高炉の全体概
要を示す正面図、第２図イ，ロは本発明の詳細を
示す冷却板の炉内取付状況図の一例を示す断面図
と正面図、第３図は第２図における横断面図、第
４図は他のシール構造の一例を示す断面図であ
る。
１……吹付装置、２……マスト、３……吹付ノ
ズル、４……鉄皮保護用冷却板、５……鉄皮、６
……すき間、７……圧入孔、８……圧入ホース、
９……圧入機、１０……作業床、１１……既設冷
却盤、１２……炉壁レンガ、１３……プレキヤス
ト耐火物、１４……冷却パイプ、１５……シール
プレート、１５……鉄皮合せ、１５′……重ね合
せ、１６……フランジ、１７……冷却板取付金
物、１８……吹付材、１９……シールパツキン、
２０……面取り部。
Fig. 1 is a front view showing an overall outline of a blast furnace to explain the present invention, and Fig. 2 A and B are a cross-sectional view and a front view showing an example of how the cooling plate is installed in the furnace, showing details of the present invention. , FIG. 3 is a cross-sectional view of FIG. 2, and FIG. 4 is a cross-sectional view showing an example of another seal structure. 1... Spraying device, 2... Mast, 3... Spraying nozzle, 4... Cooling plate for protecting the steel shell, 5... Iron shell, 6
...Gap, 7...Press-fit hole, 8...Press-fit hose,
9...Press-in machine, 10...Working floor, 11...Existing cooling board, 12...Furnace wall brick, 13...Precast refractory, 14...Cooling pipe, 15...Seal plate, 15...Iron shell Alignment, 15'... overlap, 16... flange, 17... cooling plate mounting hardware, 18... spraying material, 19... seal packing,
20... Chamfered portion.
Claims (1)
して鉄皮露出部に取付けられた、鉄皮保護用冷却
板の背面端部の周囲にシールプレートを設け、該
鉄皮保護用冷却板の炉内面の周辺端部を予め面取
りしておき、炉内から該鉄皮保護用冷却板群の目
地部及び端部の周囲に、不定形耐火材を吹付けシ
ールした後、鉄皮保護用冷却板背面と鉄皮との空
隙に炉外から圧入孔を介して泥状不定形耐火物を
圧入することを特徴とする高炉冷却板の裏風防止
方法。1. A seal plate is installed around the back end of the cooling plate for protecting the shell, which is attached to the exposed part of the shell after reducing the size of the charge below the repaired area of the blast furnace wall, to protect the shell. After chamfering the peripheral edges of the inner surface of the furnace surface of the cooling plates for cooling plates, spray sealing a monolithic refractory material from inside the furnace around the joints and edges of the group of cooling plates for protecting the steel shell. A method for preventing back draft in a blast furnace cooling plate, characterized by press-fitting a muddy monolithic refractory into the gap between the back surface of the cooling plate for skin protection and the iron skin from outside the furnace through a press-in hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11188383A JPS605810A (en) | 1983-06-23 | 1983-06-23 | Prevention of rear wind for cooling plate of blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11188383A JPS605810A (en) | 1983-06-23 | 1983-06-23 | Prevention of rear wind for cooling plate of blast furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS605810A JPS605810A (en) | 1985-01-12 |
| JPS6116403B2 true JPS6116403B2 (en) | 1986-04-30 |
Family
ID=14572536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11188383A Granted JPS605810A (en) | 1983-06-23 | 1983-06-23 | Prevention of rear wind for cooling plate of blast furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS605810A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02164035A (en) * | 1988-12-19 | 1990-06-25 | Nec Corp | Cleaning of semiconductor substrate |
| JPH0610605U (en) * | 1992-07-14 | 1994-02-10 | 株式会社フジユニバンス | Hydraulic servo mechanism |
-
1983
- 1983-06-23 JP JP11188383A patent/JPS605810A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02164035A (en) * | 1988-12-19 | 1990-06-25 | Nec Corp | Cleaning of semiconductor substrate |
| JPH0610605U (en) * | 1992-07-14 | 1994-02-10 | 株式会社フジユニバンス | Hydraulic servo mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS605810A (en) | 1985-01-12 |
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