JP3613816B2 - Blast furnace wall stave repair method - Google Patents

Blast furnace wall stave repair method Download PDF

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Publication number
JP3613816B2
JP3613816B2 JP20729194A JP20729194A JP3613816B2 JP 3613816 B2 JP3613816 B2 JP 3613816B2 JP 20729194 A JP20729194 A JP 20729194A JP 20729194 A JP20729194 A JP 20729194A JP 3613816 B2 JP3613816 B2 JP 3613816B2
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Prior art keywords
furnace
stave
refractory
repair
furnace wall
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JPH0873912A (en
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清 緒方
明生 安川
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JFE Steel Corp
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JFE Steel Corp
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Description

【0001】
【産業上の利用分野】
本発明は、高炉炉壁の耐火物やステーブの脱落、損耗が生じた損傷部を補修する高炉炉壁のステーブによる補修方法に関するものである。
【0002】
【従来の技術】
高炉上部より装入された鉱石とコークスは徐々に下方に向かって降下移動しながら高圧高温状態で還元反応して溶融した銑鉄とスラグとになる。この過程で炉内耐火物は化学的変化や物理的摩耗等により溶損し徐々に厚みを減じていき、ついには消滅する部分も発生する。
【0003】
炉内耐火物と炉鉄皮との間には耐火物の冷却手段としてたとえばステーブが配設固定してあるが、耐火物が消滅した時点で、このステーブは高温の炉内装入物に直接さらされて溶損摩耗が進み、その内部に鋳ぐるんだ冷却管まで破損することがある。
このように炉内耐火物の冷却手段としてのステーブが破損すると炉鉄皮が直接高温負荷を受けるため亀裂を発生し、炉内部のCOガスが炉外に洩れ不安全な状態になると共に、強度面でも欠陥を内在する状態になり、高炉寿命が著しく短くなる。したがって高炉改修時には炉体冷却に重要な役割を果たしているステーブは通常全部取替えている。
【0004】
しかしながら高炉の減尺休風による中間改修では、一般に短期間にかつコストを余りかけないことが要求されるのでステーブについても健全なものはそのまま残し、破損しているステーブだけを補修または取替えることになる。たとえば特開昭60−2607号公報には図3に横断面図で示すように、ステーブ本体21の炉内側に取り付けたスタッド22にプレキャスト耐火物23を備えた補修用ステーブ20を残存耐火物を除去した炉鉄皮24の露出部に配設固定する。この状態で端部シールプレート26および重合わせプレート27の箇所に炉内から吹付けノズル29により不定形耐火物を吹付けて圧入材の漏洩防止を図った後、炉鉄皮24に取り付けた圧入口25を介して不定形耐火物を圧入し、圧入材28を形成することによって補修するようにしたものが開示されている。
【0005】
【発明が解決しようとする課題】
前記特開昭60−2607号公報に開示された補修用ステーブ20を使用すれば鉄皮24を断熱保護することができるが、補修用ステーブのステーブ本体21と炉鉄皮24とのなす間隙が大きいため、この間隙に大量の不定形耐火物を供給することによって圧入材28を形成することになる。このため間隙に均一に不定形耐火物を圧入する作業時間が長くなるばかりでなく、不定形耐火物をすみずみまで均一に充填できない場合には、断熱保護が不十分になる危険性があった。また端部シールプレート26および重合わせプレート27の箇所に吹付けた不定形耐火物も、均一充填のため圧入圧力を上げると剥離しやすく、充分な充填も出来ない問題があった。
【0006】
本発明は、前記従来技術の問題点を解消し、減尺休風によって炉内装入物を炉壁損傷部を補修するに際して、補修用ステーブを用いて作業性よく短時間に補修作業を行うことができると共に断熱保護を充分に確保することができる高炉炉壁のステーブ補修方法を提供することを目的とするものである。
【0007】
【課題を解決するための手段】
前記目的を達成するための請求項1記載の本発明は、減尺休風によって炉内装入物を炉壁損傷部以下に下降させて高炉炉壁を補修するに際し、前記炉壁損傷部又は前記炉壁損傷部の残留耐火物を除去して炉鉄皮内面を露出させた炉壁損傷部位に、補修用ステーブ本体の炉内側にプレキャスト耐火物を、炉外側に炉壁損傷部位との間に不定形耐火物の流動可能な間隙をもってプレキャスト耐火物を備えると共に該補修用ステーブ周辺部に形成される目地の炉内側端部にシールを施工した補修用ステーブを所要数配設固定した後前記補修用ステーブと炉壁損傷部位とのなす間隙およびステーブ周辺部に形成される目地に、炉鉄皮に設けた流し込み口から不定形耐火物を供給して充填することを特徴とする高炉炉壁のステーブによる補修方法である。
【0008】
また請求項2記載の本発明は、補修用ステーブの周辺部に形成される目地の炉内側部にシールを施した後、炉内に原料を装入し、該装入原料をシール位置まで到達せしめて当該炉内原料の側圧によって前記シールをバックアップさせた状態として、炉鉄皮に設けた流し込み口から不定形耐火物を供給して充填することを特徴とする請求項1記載の高炉炉壁のステーブによる補修方法である。
【0009】
【作用】
本発明では、ステーブ本体の炉内側にプレキャスト耐火物を備えると共に、炉外側に炉鉄皮との間に不定形耐火物の流動可能な間隙をもってプレキャスト耐火物を施工した補修用ステーブを用いて炉壁損傷部を補修する。このようにステーブ本体と炉鉄皮との間には厚みの大きいプレキャスト耐火物が存在し、補修用ステーブと炉鉄皮とのなす間隙は、不定形耐火物の流動が可能で均一な充填を行うことができる必要最少限な寸法としてある。
【0010】
したがって、炉鉄皮に設けた流し込み口から供給する不定形耐火物が少量で済むので充填に必要な作業時間を大幅に短縮することができ、余裕をもって不定形耐火物の流し込みによる自然落下で均一な充填を達成することができる。
また、補修用ステーブを用いて補修する炉壁損傷部は、減尺により露出させた炉壁損傷部のまま、又は炉壁損傷部に残留する耐火物を除去して鉄皮を露出させた状態とする。すなわち、炉壁損傷部に凹凸が少なく補修用ステーブを配設した後の不定形耐火物の流動が確保できる場合は、炉壁損傷部はその状態下とする。一方、凹凸が多く不定形耐火物の流動が不十分となり均一充填が問題となりそうな場合は、予め残留する耐火物を除去して鉄皮を露出させた状態下で不定形耐火物の流し込みを行うことにより、均一充填が実現できる。
【0011】
【実施例】
以下、本発明の構成および作用を実施例に基づいて説明する。図1は本発明に係る高炉の炉壁損傷部を補修ステーブを用いて補修した後の縦断面図を示している。
図1に示すように、本発明で使用する補修用ステーブ1は、鋳鉄製のステーブ本体2の炉内側にプレキャスト耐火物3を備えているのは、従来と同様であるが、炉外側に炉鉄皮7と間に不定形耐火物の流動可能な間隙Sを形成できる厚みを有するプレキャスト耐火物4を備えている。なお、ステーブ本体2には、上下に保護管6が接続されており、この保護管6を通して鋳込水冷管5が鋳ぐるにより埋設してあるのは従来通りである。
【0012】
減尺休風により炉内装入物8を高炉シャフト部に発生した炉壁損傷部以下に下降させて高炉炉壁を補修するに際し、損傷した既設ステーブを撤去し、炉壁損傷部の表層の凹凸が激しくない場合はそのままで、凹凸が多い場合はさらに残留している炉内耐火物を除去して炉鉄皮7の裏面を露出させる。次いで予め用意してある補修用ステーブ1を炉頂マンホールあるいは別途炉頂鉄皮を切り開いた開口からワイヤを介して吊持しウインチを巻き戻しながら垂下し、補修部に対向させる。
【0013】
炉鉄皮7に設けてある上下の管座9に、補修用ステーブ1に接続した上下の保護管6を挿通させたのち、補修用ステーブ1と炉鉄皮7との間隙Sが不定形耐火物の流動が可能な大きさになるように調整して保護管6を介して上下の管座9に固定する。このようにして炉壁補修部に所要数の補修用ステーブ1を配設固定する。
【0014】
次に、補修用ステーブ1に隣接して配置された既設のステーブ1Aおよび上側に隣接する補修用ステーブ1との間に形成される目地の炉内側部に鉄パテ等のシール材を詰め込んでシール10を施す。このシール10だけでは不十分な場合には、シール10の外側にシール押え板11を固定して補強する。または予め、ステーブのまわりに隣接するステーブとラップするようなシール板を付けて炉壁損傷部の前面にステーブを取り付けた段階でシールが機能するようにする。さらには、前述隣接して配置された既設のステーブ1Aおよび上側に隣接する補修用ステーブ1との間に形成される目地を炉内側に向かって拡開したテーパ目地としておき、この目地に炉内側より不定形耐火物を吹付けてシールを構成することでもよい。
【0015】
このようにして目地にシール10を詰め込んだら炉鉄皮7に配設した流し込み口12から不定形耐火物を流し込みまたは圧入により供給し、補修用ステーブ1と炉鉄皮7とのなす間隙および周辺の目地に不定形耐火物を充填して耐火物層13を形成するものである。この際、流し込み口12のレベル近傍まで不定形耐火物を充填したら、その上方に設けた流し込み口12に切替えて不定形耐火物を供給するという具合に下側から順次上側の流し込み口12に切替える。このとき目地に詰め込んだシール10により不定形耐火物が目地から炉内に漏洩するのを防止するので、すみずみまで均一な耐火物層13が形成されることになる。またシール部位の強度が低くても、不定形耐火物の充填を順次に分割して行うため、分割して流し込む量の充填圧に耐えられればよく、シール漏れは最少に抑えられる。
【0016】
図2は本発明の他の構成を示しており、図2に示す場合には、補修用のステーブ1を炉鉄皮7に配設固定した後、補修用ステーブ1の周辺部に形成される目地の炉内側部にシールプレート等によるシール10を形成したら、高炉内に炉内装入物8を装入する。このようにすることによって目地に形成したシール10が、流し込み口12から流し込まれる不定形耐火物の圧力によって炉内側に押し出されようとするのを炉内装入物8の側圧によってシール10をバックアップしてシール漏れ発生を阻止するものであり、これによって不定形耐火物の均一な充填が可能になる。この充填方法の場合、シール漏れが発生しても、炉内装入物8で漏れが防止され炉内側に流入する不定形耐火物は少量である。
【0017】
ステーブ本体2の厚み 240mm、炉内側プレキャスト耐火物3の厚み 150mm、炉外側プレキャスト耐火物4の厚み 400mmとして高さおよび幅は補修部の大きさを考慮して各段ごとに種々の寸法の補修用ステーブを組み合わせることによって炉壁損傷部の補修を行った。代表的な補修用ステーブにおける鋳鉄製ステーブ本体重量は5140kg、表裏に使用したプレキャスト耐火物重量は2556kgで合計重量は7496kgであった。
【0018】
補修用ステーブの目地にはシールプレート等のシールを施すと共に補修用ステーブと炉鉄皮とのなす間隙Sは不定形耐火物の流動性を考慮して50〜 100mmに設定した。炉鉄皮7に設けた流し込み口12から流し込む不定形耐火物としては表1に示す性状および成分のものを使用し、流し込みによりステーブと鉄皮との間隙S=50〜 100mmとステーブ間の目地の間隙約50mmに充填した。
【0019】
【表1】

Figure 0003613816
【0020】
表1に示すように本発明で使用する不定形耐火物は供給ホース等の途中で固まって詰まるのを防止するため硬化時間が3〜5時間に延びるように調整したものを用いた。その他の性状も良好であり、均一な充填のもとに耐火物層13を形成することができ、充填後の養生時間は 5.5時間とした。
本実施例では、炉鉄皮7に配設した流し込み口12から不定形耐火物を流し込みによる自然落下により供給したが、これは充填した不定形耐火物がシール10の部分からシール漏れを生じる危険性があったためである。補修用ステーブ1の目地に施したシール10の外側をシール押え板11を固定するか、図2に示すようにシール10を施した後、炉内装入物8によってシール10をバックアップすれば、不定形耐火物を流し込み口12より圧入式により供給してもシール10からシール漏れの恐れなく充填することが可能になる。
【0021】
なお、本発明はステーブとは異なる冷却手段を備えた高炉の炉壁損傷部を補修するのにも適用可能である。
【0022】
【発明の効果】
以上説明したように本発明によれば、ステーブ本体の炉内側の他に炉外側にもプレキャスト耐火物を備えていると共に、補修用ステーブと炉鉄皮とのなす間隙を不定形耐火物の流動が可能な必要少限としてある。このため炉壁補修部に所要数の補修用ステーブを配設固定した後に施工する補修用ステーブと炉鉄皮とのなす間隙および補修用ステーブの周辺に形成される目地に不定形耐火物を供給して充填するのに要する補修作業時間を大幅に短縮することができる。
【0023】
また補修用ステーブの周辺部に形成される目地の炉内側端部にシールを施し、炉内装入物によってシールをバックアップしてあるので、不定形耐火物を供給して充填する際に目地から不定形耐火物が炉内に漏洩するのを確実に防止することができる。
さらに補修用ステーブと炉鉄皮との間隙や周辺目地に不定形耐火物をすみずみまで充填することができるので高炉操業中炉鉄皮を断熱保護できると共に、補修用ステーブと炉鉄皮との間を流れる裏風を確実に防止できるので炉壁の寿命延長が達成される。
【図面の簡単な説明】
【図1】本発明の実施例に係る高炉炉壁のステーブによる補修構造を示す縦断面図である。
【図2】本発明の他の実施例に係る高炉炉壁のステーブによる補修構造を示す縦断面図である。
【図3】従来例に係る高炉炉壁のステーブによる補修構造を示す横断面図である。
【符号の説明】
1 補修用ステーブ
2 ステーブ本体
3 プレキャスト耐火物(炉内側)
4 プレキャスト耐火物(炉外側)
5 鋳込水冷管
6 保護管
7 炉鉄皮
8 炉内装入物
9 管座
10 シール
11 シール押え板
12 流し込み口
13 耐火物層[0001]
[Industrial application fields]
The present invention relates to a method for repairing a blast furnace wall with a stave, which repairs a damaged part where the refractory or stave of the blast furnace wall has dropped or worn out.
[0002]
[Prior art]
The ore and coke charged from the upper part of the blast furnace gradually move downward and move to a reduced reaction under high pressure and high temperature to become molten pig iron and slag. In this process, the refractory in the furnace melts down due to chemical changes, physical wear, etc., gradually decreases in thickness, and eventually disappears.
[0003]
For example, a stave is disposed and fixed between the refractory in the furnace and the furnace core as a cooling means for the refractory, but when the refractory disappears, the stave is directly exposed to the high-temperature furnace interior. As a result, the erosion wear progresses, and even the cooling pipe cast in the inside may be damaged.
If the stave as a cooling means for the refractory in the furnace is broken in this way, the furnace iron shell is directly subjected to high-temperature load, causing cracks, and the CO gas inside the furnace leaks out of the furnace, making it unsafe and strong. Even on the surface, the defects are inherent, and the life of the blast furnace is remarkably shortened. Therefore, at the time of blast furnace renovation, all the staves that play an important role in cooling the furnace body are usually replaced.
[0004]
However, intermediate refurbishment with reduced blast furnace breakage generally requires a short period of time and not much cost, so the staves should remain healthy and only repair or replace damaged staves. Become. For example, in Japanese Patent Application Laid-Open No. 60-2607, as shown in a cross-sectional view in FIG. 3, a repair stave 20 provided with a precast refractory 23 is attached to a stud 22 attached to the inside of a furnace of a stave body 21 with a remaining refractory. It arranges and fixes to the exposed part of the removed furnace iron shell 24. In this state, an irregular refractory is sprayed from the inside of the furnace by the spray nozzle 29 onto the end seal plate 26 and the overlapping plate 27 to prevent leakage of the press-fit material, and then the pressure attached to the furnace core 24 is set. An article is disclosed in which an indefinite refractory is press-fitted through an inlet 25 and repaired by forming a press-fitting material 28.
[0005]
[Problems to be solved by the invention]
If the repair stave 20 disclosed in Japanese Patent Laid-Open No. 60-2607 is used, the iron skin 24 can be insulated and protected, but there is a gap between the stave body 21 and the furnace core 24 of the repair stave. Since it is large, the press-fitting material 28 is formed by supplying a large amount of the irregular refractory material to the gap. For this reason, not only does the work time for uniformly injecting the irregular refractory into the gap increase, but there is a risk that the adiabatic protection will be insufficient if the irregular refractory cannot be filled uniformly throughout. . In addition, the irregular refractory material sprayed on the end seal plate 26 and the overlapping plate 27 also has a problem that it is easily peeled off when the press-fitting pressure is raised for uniform filling and cannot be sufficiently filled.
[0006]
The present invention eliminates the problems of the prior art and performs repair work in a short time with good workability using a repairing stave when repairing a furnace wall damaged part with a reduced scale downwind. It is an object of the present invention to provide a method for repairing a blast furnace wall stave that is capable of ensuring sufficient insulation protection.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention according to claim 1 is directed to repairing the blast furnace furnace wall by lowering the furnace interior material below the damaged furnace wall by reducing downwind, Remove the residual refractory from the damaged part of the furnace wall and expose the inner surface of the furnace core to the damaged part of the furnace wall, place the precast refractory inside the furnace of the repair stave body, and the outer part of the furnace wall between the damaged part of the furnace wall. After repairing the required number of repair staves with a precast refractory having a flowable gap between the irregular refractories and having a seal applied to the inner end of the joint formed in the periphery of the repair staves The blast furnace wall is characterized in that an amorphous refractory is supplied and filled in the gap formed between the stave and the damaged part of the furnace wall and the joint formed in the periphery of the stave from the inlet provided in the furnace core. It is a repair method by stave
[0008]
According to the second aspect of the present invention, after sealing the inside of the joint formed in the periphery of the repair stave, the raw material is charged into the furnace, and the charged raw material reaches the sealing position. 2. A blast furnace wall according to claim 1, wherein the seal is backed up by the side pressure of the raw material in the furnace, and an amorphous refractory is supplied and filled from a pouring port provided in the furnace core. This is a repair method by stave.
[0009]
[Action]
In the present invention, a furnace using a repair stave provided with a precast refractory inside the furnace of the stave body and constructed with a precast refractory having a flowable gap between the amorphous refractory and the furnace core outside the furnace. Repair damaged walls. In this way, there is a thick precast refractory between the stave body and the furnace iron shell, and the gap between the repair stave and the furnace iron shell allows the flow of the irregular refractory and ensures uniform filling. The minimum required dimensions that can be achieved.
[0010]
Therefore, since a small amount of the amorphous refractory supplied from the pouring port provided in the furnace shell is sufficient, the work time required for filling can be greatly shortened. Filling can be achieved.
In addition, the damaged part of the furnace wall to be repaired using the repair stave remains as the damaged part of the furnace wall exposed by the scale, or the refractory remaining in the damaged part of the furnace wall is removed to expose the iron skin. And That is, if the irregularity refractory flows after the repair stave is provided with few irregularities in the damaged part of the furnace wall, the damaged part of the furnace wall is in that state. On the other hand, when there is a lot of irregularities and the flow of the irregular refractory is insufficient and uniform filling is likely to be a problem, the refractory remaining in advance is removed and the amorphous refractory is poured under the condition that the iron skin is exposed. By performing, uniform filling can be realized.
[0011]
【Example】
Hereinafter, the configuration and operation of the present invention will be described based on examples. FIG. 1: has shown the longitudinal cross-sectional view after repairing the furnace wall damaged part of the blast furnace based on this invention using a repair stave.
As shown in FIG. 1, the repair stave 1 used in the present invention is provided with a precast refractory 3 inside the furnace body of a cast iron stave body 2 as in the prior art. A precast refractory 4 having a thickness capable of forming a flowable gap S of the amorphous refractory between the iron shell 7 is provided. A protective tube 6 is connected to the stave body 2 at the top and bottom, and the cast water cooling tube 5 is embedded by casting through the protective tube 6 as usual.
[0012]
When repairing the blast furnace furnace wall by lowering the furnace interior material 8 below the damaged furnace wall generated in the blast furnace shaft by reduced wind, the damaged existing stave is removed and the surface irregularities of the damaged furnace wall are removed. If it is not severe, it remains as it is. If there are many irregularities, the remaining furnace refractory is removed to expose the back surface of the furnace core 7. Next, the repaired stave 1 prepared in advance is suspended from a furnace top manhole or an opening in which the furnace top iron skin is cut open through a wire, suspended while unwinding the winch, and opposed to the repaired portion.
[0013]
After the upper and lower protective tubes 6 connected to the repairing stave 1 are inserted into the upper and lower tube seats 9 provided in the furnace iron skin 7, the gap S between the repairing stave 1 and the furnace iron shell 7 is indeterminate fireproof. It adjusts so that the flow of a thing may become possible, and it fixes to the upper and lower pipe seats 9 via the protective pipe 6. FIG. In this way, the required number of repair staves 1 are disposed and fixed to the furnace wall repair section.
[0014]
Next, a seal material such as iron putty is packed in the joint inside the furnace formed between the existing stave 1A arranged adjacent to the repair stave 1 and the repair stave 1 adjacent to the upper side. 10 is applied. When the seal 10 alone is not sufficient, the seal retainer plate 11 is fixed to the outside of the seal 10 for reinforcement. Alternatively, a seal plate that wraps around the stave with the adjacent stave is attached in advance so that the seal functions at the stage where the stave is attached to the front surface of the damaged portion of the furnace wall. Further, a joint formed between the existing stave 1A arranged adjacent to the above and the repair stave 1 adjacent to the upper side is set as a taper joint expanded toward the inside of the furnace. It is also possible to form a seal by spraying a more irregular refractory.
[0015]
After the seal 10 is packed in the joint in this manner, an irregular refractory is supplied by pouring or press-fitting from the pouring port 12 provided in the furnace core 7, and the gap between the repair stave 1 and the furnace core 7 and the surrounding area The refractory layer 13 is formed by filling the joints with an irregular refractory. At this time, when the amorphous refractory is filled to the vicinity of the level of the pouring port 12, the pouring port 12 is switched to the upper pouring port 12 from the lower side in order, for example, by switching to the pouring port 12 provided above it and supplying the amorphous refractory. . At this time, since the irregular refractory is prevented from leaking from the joint into the furnace by the seal 10 packed in the joint, a uniform refractory layer 13 is formed everywhere. Further, even if the strength of the seal portion is low, the filling of the irregular refractory is performed in order, so that it is only necessary to withstand the filling pressure of the amount that is divided and poured, and seal leakage is minimized.
[0016]
FIG. 2 shows another configuration of the present invention. In the case shown in FIG. 2, after the repair stave 1 is disposed and fixed to the furnace core 7, it is formed around the repair stave 1. When the seal 10 such as a seal plate is formed on the inside of the joint at the furnace, the furnace interior charge 8 is charged into the blast furnace. By doing so, the seal 10 formed at the joint is backed up by the side pressure of the furnace interior charge 8 so as to be pushed out into the furnace by the pressure of the irregular refractory poured from the inlet 12. This prevents the occurrence of seal leakage, which enables uniform filling of the irregular refractory. In the case of this filling method, even if a seal leak occurs, the leak is prevented by the furnace interior material 8 and a small amount of the irregular refractory flowing into the furnace inside is small.
[0017]
The thickness of the stave body 2 is 240 mm, the thickness of the precast refractory 3 inside the furnace is 150 mm, the thickness of the precast refractory 4 outside the furnace is 400 mm, and the height and width are repaired in various dimensions in consideration of the size of the repaired part. The furnace wall damage was repaired by combining the stave. The weight of the cast iron stave body in a typical repair stave was 5140 kg, the precast refractory weight used on the front and back was 2556 kg, and the total weight was 7496 kg.
[0018]
The joint of the repair stave was sealed with a seal plate or the like, and the gap S formed between the repair stave and the furnace iron skin was set to 50 to 100 mm in consideration of the fluidity of the irregular refractory. The amorphous refractory poured from the pouring port 12 provided in the furnace core 7 has the properties and components shown in Table 1, and the gap between the stave and the iron shell by casting is 50 to 100 mm and the joint between the stave The gap was about 50 mm.
[0019]
[Table 1]
Figure 0003613816
[0020]
As shown in Table 1, the amorphous refractory used in the present invention was adjusted so that the curing time was extended to 3 to 5 hours in order to prevent clogging due to solidification in the middle of a supply hose or the like. The other properties were also good, the refractory layer 13 could be formed under uniform filling, and the curing time after filling was 5.5 hours.
In the present embodiment, the amorphous refractory is supplied from the pouring port 12 provided in the furnace core 7 by natural dropping by pouring, but this is a risk that the filled amorphous refractory may cause seal leakage from the seal 10 portion. This is because there was sex. If the seal holding plate 11 is fixed to the outside of the seal 10 applied to the joint of the repair stave 1 or the seal 10 is applied as shown in FIG. Even if the regular refractory is supplied from the pouring port 12 by the press-fitting method, it can be filled from the seal 10 without fear of seal leakage.
[0021]
Note that the present invention is also applicable to repairing a damaged wall of a blast furnace provided with cooling means different from the stave.
[0022]
【The invention's effect】
As described above, according to the present invention, the precast refractory is provided on the outside of the furnace in addition to the inside of the furnace of the stave body, and the gap formed between the repair stave and the furnace iron skin is changed to flow of the irregular refractory. There is a necessary minimum. For this reason, after supplying the required number of repair staves to the furnace wall repair section, supply the irregular refractory to the gap formed between the repair staves and the furnace iron skin, and the joints formed around the repair staves. Thus, the repair work time required for filling can be greatly shortened.
[0023]
In addition, a seal is applied to the inner end of the joint formed in the periphery of the repair stave, and the seal is backed up by the furnace interior. It is possible to reliably prevent the regular refractory from leaking into the furnace.
In addition, it is possible to fill the gap between the repair stave and the furnace core and the surrounding joints with refractory materials throughout the blast furnace, so that the furnace core can be insulated and protected during operation of the blast furnace, and between the repair stave and the furnace core. Since the back wind flowing between them can be reliably prevented, the life of the furnace wall can be extended.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a repair structure using a stave of a blast furnace wall according to an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view showing a repair structure using a stave of a blast furnace wall according to another embodiment of the present invention.
FIG. 3 is a cross-sectional view showing a repair structure using a stave of a blast furnace wall according to a conventional example.
[Explanation of symbols]
1 Stave for repair 2 Stave body 3 Precast refractory (furnace inside)
4 Precast refractories (outside of furnace)
5 Cast-in water-cooled tube 6 Protective tube 7 Furnace iron skin 8 Furnace interior entrance 9 Tube seat 10 Seal 11 Seal retainer plate 12 Pour-in port 13 Refractory layer

Claims (2)

減尺休風によって炉内装入物を炉壁損傷部以下に下降させて高炉炉壁を補修するに際し、前記炉壁損傷部又は前記炉壁損傷部の残留耐火物を除去して炉鉄皮内面を露出させた炉壁損傷部位に、補修用ステーブ本体の炉内側にプレキャスト耐火物を、炉外側に炉壁損傷部位との間に不定形耐火物の流動可能な間隙をもってプレキャスト耐火物を備えると共に該補修用ステーブ周辺部に形成される目地の炉内側端部にシールを施工した補修用ステーブを所要数配設固定した後前記補修用ステーブと炉壁損傷部位とのなす間隙およびステーブ周辺部に形成される目地に、炉鉄皮に設けた流し込み口から不定形耐火物を供給して充填することを特徴とする高炉炉壁のステーブによる補修方法。When repairing the blast furnace furnace wall by lowering the furnace interior contents below the damaged furnace wall by reducing off-wind, removing the residual refractory from the damaged furnace wall or damaged furnace wall, A precast refractory is provided on the inside of the furnace wall of the repair stave body, and a precast refractory is provided on the outside of the furnace with a flowable gap between the unshaped refractory and the damaged part of the furnace wall. After the required number of repair staves with seals are arranged and fixed at the inner end of the joint formed in the periphery of the repair staves, the gap between the repair staves and the damaged part of the furnace wall and the periphery of the staves A method of repairing a blast furnace wall with a stave, wherein the formed joint is filled with an indefinite shape refractory from a pouring opening provided in the furnace core. 補修用ステーブの周辺部に形成される目地の炉内側部にシールを施した後、炉内に原料を装入し、該装入原料をシール位置まで到達せしめて当該炉内原料の側圧によって前記シールをバックアップさせた状態として、炉鉄皮に設けた流し込み口から不定形耐火物を供給して充填することを特徴とする請求項1記載の高炉炉壁のステーブによる補修方法。After sealing the joint inside the furnace formed in the peripheral portion of the repair stave, the raw material is charged into the furnace, and the charged raw material reaches the sealing position, and the side pressure of the raw material in the furnace 2. The method of repairing a blast furnace furnace wall with a stave according to claim 1, wherein the seal is backed up, and an irregular refractory is supplied and filled from a pouring port provided in the furnace shell.
JP20729194A 1994-08-31 1994-08-31 Blast furnace wall stave repair method Expired - Fee Related JP3613816B2 (en)

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JP20729194A JP3613816B2 (en) 1994-08-31 1994-08-31 Blast furnace wall stave repair method

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JP4704277B2 (en) * 2006-05-23 2011-06-15 新日鉄エンジニアリング株式会社 Filling refractory around the blast furnace stave cooler
KR102164735B1 (en) * 2018-12-03 2020-10-13 주식회사 포스코 Apparatus for adjusting chargeing material in blast furnace
CN116140999A (en) * 2023-03-31 2023-05-23 山东省冶金设计院股份有限公司 A method of manufacturing and installing a blast furnace gas enclosure

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