JPH0663013B2 - Stave type blast furnace repair method - Google Patents
Stave type blast furnace repair methodInfo
- Publication number
- JPH0663013B2 JPH0663013B2 JP63263684A JP26368488A JPH0663013B2 JP H0663013 B2 JPH0663013 B2 JP H0663013B2 JP 63263684 A JP63263684 A JP 63263684A JP 26368488 A JP26368488 A JP 26368488A JP H0663013 B2 JPH0663013 B2 JP H0663013B2
- Authority
- JP
- Japan
- Prior art keywords
- stave
- cooling
- blast furnace
- furnace
- cooling metal
- 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 - Fee Related
Links
Landscapes
- Blast Furnaces (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、ステーブ式高炉の補修方法に関する。The present invention relates to a method for repairing a stave type blast furnace.
この種のステーブ式高炉において、炉の寿命末期にな
り、炉内煉瓦が損耗し、また脱落し、ステーブが露出す
ると、やがてステーブが炉内の高温ガスや装入物（焼結
鉱、鉱石、コークスなど）と直接接触し、摩耗を受け
る。その結果、冷却が十分になされないステーブのコー
ナー部や上下の接続部の鋳物部分が欠落損傷する。ま
た、ステーブの冷却パイプが何らかの原因で破れた場合
においても、冷却が十分なされない破断部近くの鋳物は
損傷が激しい。In this type of stave blast furnace, at the end of the life of the furnace, the bricks in the furnace are worn out and fall off, and when the stave is exposed, the stave eventually becomes a hot gas or charge (sinter ore, ore, etc.) in the furnace. Direct contact with coke) and wear. As a result, the corners of the stave and the cast parts of the upper and lower connecting parts, which are not sufficiently cooled, are missing and damaged. Further, even if the cooling pipe of the stave breaks for some reason, the casting near the fractured part where cooling is insufficient is severely damaged.
このような状態になると、鉄皮が直接炉内に露出するた
め、鉄皮に熱クリープによる亀裂が発生し、ガス吹出し
事故を招く。In such a state, the iron shell is directly exposed to the inside of the furnace, and thus cracks due to thermal creep occur in the iron shell, resulting in a gas blowout accident.
そこで、従来、この種のステーブの損耗が生じた場合、
たとえば特公昭61-16402号のように、装入物のストック
レベルを当該損耗部以下に下げて、その損耗部に対し
て、炉内より不定形耐火物を吹付けて簡易補修してい
た。So, conventionally, when this kind of stave wear occurs,
For example, as in Japanese Examined Patent Publication No. Sho 61-16402, the stock level of the charge was lowered below the wear part, and the wear part was simply repaired by spraying an irregular refractory material from the inside of the furnace.
しかし、この種の簡易補修では、冷却が十分になされな
い、高温での摩耗強度および壁への接着強度が十分でな
いことから、寿命は３〜６ヶ月程度できわめて短い。However, in this kind of simple repair, the life is extremely short at about 3 to 6 months because the cooling is not sufficiently performed, the wear strength at high temperature and the adhesion strength to the wall are not sufficient.
したがって、最終的にはステーブを取替えなければなら
ないが、工事費および工期が著しく嵩む。Therefore, the stave must be finally replaced, but the construction cost and the construction period increase significantly.
このように、ステーブ式高炉におけるステーブの損耗に
対しては、未だ十分な対応ができないでいた。As described above, it has not been possible to sufficiently deal with the wear of the stave in the stave type blast furnace.
上記課題は、ステーブ式高炉において、ステーブ間に生
じた損耗部の形状を計測し、実質的にこの損耗部形状に
合わせて、冷却パイプを内設した冷却金物を製作し、前
記損耗部をそのままの状態として前記冷却金物をその炉
内面が周囲の残存ステーブの炉内面とほぼ同一レベルと
なるように炉内より取付けることで解決できる。また、
好ましくは前記冷却金物を取り付けた後、該冷却金物の
背面側鉄皮に形成した圧入孔から不定形耐火物を圧入
し、冷却金物と鉄皮との間隙部分、および冷却金物と残
存ステーブとの間隙部分に不定形耐火物を充填する。In the stave type blast furnace, the above-mentioned problem is to measure the shape of the wear portion generated between the staves, to substantially match the shape of the wear portion, manufacture a cooling metal fitting with a cooling pipe installed therein, and directly wear the wear portion. In this state, the cooling hardware can be installed from the inside of the furnace so that the inside surface of the furnace is at substantially the same level as the inside surfaces of the surrounding remaining stave. Also,
Preferably, after the cooling hardware is attached, an amorphous refractory is press-fitted through a press-fitting hole formed in the back side iron shell of the cooling hardware to form a gap between the cooling hardware and the steel shell, and the cooling hardware and the remaining stave. Fill the gap with amorphous refractory.
本発明では、ステーブの損耗は、冷却が十分になされな
いステーブ間においてまず生じること、すなわちステー
ブ内の冷却パイプによる冷却が最も行き届かないコーナ
ー部や周囲の欠損から始まることに鑑み、その損耗形状
を計測し、これに合わせた冷却金物を製作して取付け
る。したがって、最小形状の冷却金物で足り経済的であ
るとともに、損耗形状に冷却金物がほぼ適合して収ま
り、該損耗部をきっちりと精度良く補修することができ
るため、補修効果が高くかつ長期に渡って持続するもの
となる。In the present invention, the wear of the staves occurs first between staves that are not sufficiently cooled, that is, the wear shape of the staves starts from the corners and the peripheral defects where the cooling by the cooling pipes inside the staves does not reach the maximum. Is measured, and a cooling metal fitting is manufactured and attached according to this. Therefore, the cooling metal fitting of the minimum shape is economical, and the cooling metal fitting fits into the worn shape and fits, and the worn part can be repaired accurately and precisely, so the repair effect is high and it can be used for a long time. Will be sustained.
また、前記冷却金物は、冷却用パイプを内設するため、
冷却パイプに冷却水を流通させることによって、冷却金
物が十分に冷却され、長期間にわたってそれ自体の損耗
が効果的に防止されるとともに、ステーブ式高炉の損耗
も防止される。Further, since the cooling hardware has a cooling pipe internally provided,
By circulating the cooling water through the cooling pipe, the cooling metal article is sufficiently cooled, and the wear of the stave type blast furnace is effectively prevented as well as the wear of the stave type blast furnace is effectively prevented for a long period of time.
また、冷却金物は、欠損部に嵌合して取り付けられる結
果、周囲の残存ステーブに取り囲まれることになるた
め、その後は装入物よる摩耗がほとんどなく、たとえ一
部健全なステーブより突出したとしても冷却金物の冷却
パイプがステーブ間にある限り、冷却パイプが破損する
ことはなく、かつ消耗が突出部のみに抑えることができ
る。Also, the cooling metal fitting is fitted into the defective part and attached, and as a result, it is surrounded by the remaining stave in the surroundings, so after that there is almost no wear due to the charged material, and even if it partially protrudes from a healthy stave. As long as the cooling pipe of the cooling hardware is between the staves, the cooling pipe is not damaged, and the consumption can be suppressed only to the protruding portion.
さらに、好ましくは冷却金物の周囲には不定形耐火物を
充填することにより、鉄皮が炉内の高温ガスに曝される
ことがなく、鉄皮の亀裂などのトラブルを十分に防止で
きる。Further, preferably, by filling an amorphous refractory material around the cooling metal object, the iron shell is not exposed to the high temperature gas in the furnace, and troubles such as cracking of the iron shell can be sufficiently prevented.
以下本発明をさらに詳説する。 The present invention will be described in more detail below.
いま、第２図のように、長期にわたるステーブ式高炉の
操業の結果、建設時の煉瓦面Ｓ０から煉瓦１が脱落した
り損耗し、一部のみが残存し、さらに、ステーブ２が建
設時のステーブ面Ｓ１より損耗したときにおいて、次の
ような補修がなされる。As shown in FIG. 2, as a result of the operation of the stave type blast furnace for a long time, the brick 1 is dropped or worn from the brick surface S 0 at the time of construction, only a part remains, and the stave 2 is further constructed. When the stave surface S 1 is worn out, the following repair is performed.
すなわち、第４図のように、煉瓦が脱落し、冷却パイプ
２ａを有するステーブ２Ａ，２Ｂ間において、それらの
部分Ｐａ，Ｐｂが損耗し、鉄皮３が直接炉内の高温ガス
に曝されるようになったとき、冷却金物４をステーブ２
Ａ，２Ｂ間に取付ける。That is, as shown in FIG. 4, the bricks fall off, the portions Pa and Pb between the staves 2A and 2B having the cooling pipe 2a are worn, and the iron shell 3 is directly exposed to the high temperature gas in the furnace. When it becomes like this, the cooling hardware 4 is attached to the stave 2
Install between A and 2B.
冷却金物４は、第７図および第８図に示すように、ステ
ーブ２Ａ，２Ｂの損耗によって生じた損耗空間形状に実
質的に合わせた横断面形状、たとえば横断面台形状の鋳
鉄４Ａ部分に冷却パイプ４Ｂを鋳包んだものである。As shown in FIGS. 7 and 8, the cooling metal fitting 4 is cooled to a cast iron 4A portion having a transverse cross-sectional shape substantially matching the wear space shape caused by the wear of the staves 2A and 2B, for example, a cross-section trapezoidal cast iron 4A. The pipe 4B is cast and wrapped.
この冷却金物４は、第５図のように、補修前に、装入物
５のストックレベルを当該補修対象部より下げ、高炉炉
頂部のマンホール等から冷却金物４を補修対象部まで吊
り下げ、冷却パイプ４Ｂ端を予め鉄皮３に穿孔した引出
孔３ａから炉外に引き出し、その端部を取付フランジ６
などを介して鉄皮３に固定することにより取付ける。次
いで、鉄皮３に穿孔した圧入孔３ｂから不定形耐火物７
を炉外から圧入し、その鉄皮３と冷却金物４との間、お
よび冷却金物４と残存ステーブ２Ａ，２Ｂとの間に充填
する。必要により、炉内から残存ステーブ２Ａ，２Ｂと
冷却金物４との間隙または圧入不定形耐火物表面、なら
びに冷却金物４の炉内面に対して不定形耐火物を吹付け
てもよい。As shown in FIG. 5, the cooling hardware 4 lowers the stock level of the charging material 5 from the repair target portion before the repair, and hangs the cooling hardware 4 from the manhole or the like at the top of the blast furnace to the repair target portion. The end of the cooling pipe 4B is drawn out of the furnace through an extraction hole 3a formed in the steel shell 3 in advance, and its end is attached to a mounting flange 6
It is attached by fixing it to the iron skin 3 via, for example. Next, from the press-fitting hole 3b formed in the iron shell 3, the irregular-shaped refractory 7
Is press-fitted from the outside of the furnace, and the space between the iron shell 3 and the cooling hardware 4 and between the cooling metal 4 and the remaining staves 2A and 2B are filled. If necessary, the irregular refractory may be blown from the inside of the furnace to the gap between the remaining staves 2A and 2B and the cooling metal article 4 or the surface of the press-fitted indeterminate refractory material and the inner surface of the cooling metal article 4 in the furnace.
上記例において、冷却金物４の炉内面は残存（健全）ス
テーブ２Ａ，２Ｂの炉内面と実質的同一とすればよく、
若干突出していても、引っ込んでいてもよい。しかしな
がら、冷却パイプ４Ｂは残存ステーブ２Ａ，２Ｂの炉内
面より引っ込んでいることが好ましい。また、冷却金物
４の横断面は、当初のステーブ２，２の損耗に基く間隙
にほぼ対応していればよく、必らずしも前述のように台
形であることに限定されない。さらに、冷却金物４は、
その間隙の長手方向全長にわたることなく、その間隙に
長手方向に沿って複数個設けてもよい。しかも、縦方向
の間隙についても、本発明に係る冷却金物を取り付ける
ことができる。なお、損耗に基く、上記間隙形状は、た
とえば、装入物５のレベルを下げたときにおけるその損
耗部の写真撮影結果と建設時のステーブの製作図面とに
基いて判断できる。In the above example, the furnace inner surface of the cooling hardware 4 may be substantially the same as the furnace inner surfaces of the remaining (healthy) staves 2A and 2B.
It may be slightly protruding or may be retracted. However, the cooling pipe 4B is preferably retracted from the inner surface of the furnace of the remaining staves 2A and 2B. Further, the cross-section of the cooling metal piece 4 may substantially correspond to the gap caused by the initial wear of the staves 2 and 2, and is not necessarily limited to the trapezoidal shape as described above. Furthermore, the cooling hardware 4 is
A plurality of gaps may be provided along the longitudinal direction without extending over the entire length in the longitudinal direction. Moreover, the cooling hardware according to the present invention can be attached to the vertical gap. The shape of the gap based on wear can be determined based on, for example, the result of photography of the wear part when the level of the charge 5 is lowered and the production drawing of the stave at the time of construction.
次に実施例を示す。 Next, examples will be shown.
第９図(a)のように、ステーブ２１，２１間を覆うよう
に不定形耐火物Ｍを吹付けるとともに、ステーブ２１の
表面より突出して耐火物Ｍ中と、ステーブ２１，２１間
の耐火物Ｍ中とに、それぞれ熱電対を埋込んだ場合と、
第１０図(a)のように、ステーブ２１，２１の端部を切
除し、そこに冷却金物４を設け、冷却金物４の長手方向
端と鉄皮がわ表面とに熱電対を取付け、それぞれ高炉内
に曝して温度の経時的変化を調べたところ、それぞれ第
９図(b)および第１０図(b)のような結果を得た。As shown in FIG. 9 (a), the irregular refractory M is sprayed so as to cover the staves 21 and 21, and the refractory M protrudes from the surface of the stave 21 into the refractory M and between the staves 21 and 21. When the thermocouple is embedded in the inside of M,
As shown in FIG. 10 (a), the ends of the staves 21 and 21 are cut off, a cooling metal fitting 4 is provided there, and thermocouples are attached to the longitudinal ends of the cooling metal fitting 4 and the surface of the iron shell, respectively. When it was exposed to the inside of a blast furnace and the change in temperature with time was examined, the results shown in FIGS. 9 (b) and 10 (b) were obtained, respectively.
したがって、従来例では２〜３ヶ月後には、補修効果が
消失してしまうのに対して、本発明法によると、７ヶ月
後であっても十分な耐久性を有することが判る。Therefore, in the conventional example, the repair effect disappears after 2 to 3 months, whereas according to the method of the present invention, it is found that the durability is sufficient even after 7 months.
以上の通り、本発明によれば、工費が低く、かつ短い時
間での補修が可能となるとともに、補修効果が高くかつ
長期にわたって持続するなどの利点がもたらされる。As described above, according to the present invention, there are advantages that the repair cost is low, the repair can be performed in a short time, the repair effect is high, and the repair is continued for a long time.
第１図は本発明の補修部分の要部縦断面図、第２図は補
修前の高炉の縦断面図、第３図は補修後の高炉の縦断面
図、第４図は補修前の要部縦断面図、第５図は冷却金物
の吊下し取付状態図、第６図は第１図の位置を異にする
縦断面図、第７図は冷却金物の斜視図、第８図はその取
付状態の水平断面図、第９図および第１０図は従来法と
本発明法との比較を示すもので、それぞれ(a)は補修態
様縦断面図、(b)は温度の経時変化グラフである。 １…残存煉瓦、２，２Ａ，２Ｂ…ステーブ、３…鉄皮、
４…冷却金物、４Ａ…鋳物、４Ｂ…冷却パイプ、７…不
定形耐火物。FIG. 1 is a longitudinal sectional view of a main part of a repaired portion of the present invention, FIG. 2 is a longitudinal sectional view of a blast furnace before repairing, FIG. 3 is a vertical sectional view of a blast furnace after repairing, and FIG. 5 is a vertical sectional view of the cooling metal object in a suspended mounting state, FIG. 6 is a vertical sectional view in which the position of FIG. 1 is different, FIG. 7 is a perspective view of the cooling metal object, and FIG. Fig. 9 and Fig. 10 show the comparison between the conventional method and the method of the present invention in the installed state, respectively. (A) is a longitudinal sectional view of the repair mode, and (b) is a graph of temperature change with time. Is. 1 ... Remaining brick, 2, 2A, 2B ... Stave, 3 ... Iron skin,
4 ... Cooling hardware, 4A ... Casting, 4B ... Cooling pipe, 7 ... Unshaped refractory.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 黒木 隆秀 茨城県鹿島郡鹿島町大字光３番地 住友金 属工業株式会社鹿島製鉄所内 (56)参考文献 特開 昭60−184608（ＪＰ，Ａ) 特開 昭58−123804（ＪＰ，Ａ) 特開 昭60−2607（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Takahide Kuroki, 3rd, Hikari, Kashima-cho, Kashima-cho, Kashima-gun, Ibaraki Prefecture, Sumitomo Metal Industries, Ltd. Kashima Steel Works (56) Reference JP-A-60-184608 (JP, A) Kai 58-123804 (JP, A) JP-A-60-2607 (JP, A)
Claims (2)
じた損耗部の形状を計測し、実質的にこの損耗部形状に
合わせて、冷却パイプを内設した冷却金物を製作し、前
記損耗部をそのままの状態として前記冷却金物をその炉
内面が周囲の残存ステーブの炉内面とほぼ同一レベルと
なるように炉内より取付けることを特徴とするステーブ
式高炉の補修方法。1. In a stave type blast furnace, the shape of a worn portion generated between staves is measured, a cooling metal fitting having a cooling pipe therein is manufactured so as to substantially match the worn portion shape, and the worn portion is removed. A method for repairing a stave type blast furnace, characterized in that the cooling metal article is mounted in the furnace as it is so that the inner surface of the furnace is substantially at the same level as the inner surface of the surrounding remaining stave.
の背面側鉄皮に形成した圧入孔から不定形耐火物を圧入
し、冷却金物と鉄皮との間隙部分、および冷却金物と残
存ステーブとの間隙部分に不定形耐火物を充填すること
を特徴とする請求項１記載のステーブ式高炉の補修方
法。2. After mounting the cooling metal fitting, an irregular shaped refractory material is press-fitted through a press-fitting hole formed on the back side iron shell of the cooling metal fitting, and a gap portion between the cooling metal fitting and the iron shell and the cooling metal fitting remain. The stave-type blast furnace repairing method according to claim 1, characterized in that an irregular-shaped refractory is filled in a gap between the stave and the stave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63263684A JPH0663013B2 (en) | 1988-10-19 | 1988-10-19 | Stave type blast furnace repair method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63263684A JPH0663013B2 (en) | 1988-10-19 | 1988-10-19 | Stave type blast furnace repair method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02111805A JPH02111805A (en) | 1990-04-24 |
| JPH0663013B2 true JPH0663013B2 (en) | 1994-08-17 |
Family
ID=17392903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63263684A Expired - Fee Related JPH0663013B2 (en) | 1988-10-19 | 1988-10-19 | Stave type blast furnace repair method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0663013B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101585811B1 (en) * | 2014-12-22 | 2016-01-15 | 주식회사 포스코 | Furnace and method for delaying abrasion of same |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54131508A (en) * | 1978-04-05 | 1979-10-12 | Kawasaki Steel Co | Repairing blast furnace body |
| JPS602607A (en) * | 1983-06-20 | 1985-01-08 | Nippon Steel Corp | Repairing method of blast furnace wall |
| JPS6050106A (en) * | 1983-08-29 | 1985-03-19 | Nippon Steel Corp | Relining method of blast furnace wall |
| JPS60184608A (en) * | 1984-02-29 | 1985-09-20 | Sumitomo Metal Ind Ltd | Repairing method of furnace wall of blast furnace |
-
1988
- 1988-10-19 JP JP63263684A patent/JPH0663013B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02111805A (en) | 1990-04-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8920709B2 (en) | Cooling plate for a metallurgical furnace | |
| US3396961A (en) | Precast taphole assembly | |
| JPH0663013B2 (en) | Stave type blast furnace repair method | |
| US7566413B2 (en) | Method for protecting a tuyere assembly and a refractory lining of a furnace | |
| KR101574777B1 (en) | firebrick liner unit | |
| JP2008127619A (en) | Method for deciding whether repair of refractory in molten iron ladle is needed or not | |
| JP2725576B2 (en) | Water-cooled refractory panels for blast furnace wall repair | |
| JP5733091B2 (en) | Repair method for damaged parts of blast furnace body | |
| JP2914185B2 (en) | Water-cooled refractory panels for blast furnace wall repair | |
| JP2669279B2 (en) | Blast furnace operation method | |
| US1703519A (en) | Method for the protection of blast-furnace jackets | |
| JPS602607A (en) | Repairing method of blast furnace wall | |
| EP0519553B1 (en) | Method of repair of the refractory lining of the wall of a shaft furnace | |
| JP3613815B2 (en) | Repair method using staves for repairing blast furnace wall | |
| JP3940182B2 (en) | Alternative stave for cooling panel blast furnace | |
| JPH0742492B2 (en) | Repair method for stave cooler wear part on stave furnace wall of blast furnace | |
| JPH09272905A (en) | Method for repairing side wall brick of furnace bottom part in blast furnace | |
| JPS6011084Y2 (en) | Blast furnace mouth structure | |
| JP3018030B2 (en) | Reuse method of stopper and stopper used for this | |
| JPH0634362Y2 (en) | Blast furnace wear ring liner for protection of hardware | |
| JPS5916914A (en) | Cooling construction of furnace wall of blast furnace constituted of two layers cooling zone | |
| JPS6050106A (en) | Relining method of blast furnace wall | |
| JPS642874B2 (en) | ||
| JPH08218107A (en) | Method for repairing inner wall of shaft part in blast furnace and supporting block for repairing | |
| JPS6147881B2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |