JPH0941010A - Method for repairing damaging part of wall of blast furnace - Google Patents

Method for repairing damaging part of wall of blast furnace

Info

Publication number
JPH0941010A
JPH0941010A JP19476995A JP19476995A JPH0941010A JP H0941010 A JPH0941010 A JP H0941010A JP 19476995 A JP19476995 A JP 19476995A JP 19476995 A JP19476995 A JP 19476995A JP H0941010 A JPH0941010 A JP H0941010A
Authority
JP
Japan
Prior art keywords
refractory
furnace
stave
repair
irregular
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.)
Granted
Application number
JP19476995A
Other languages
Japanese (ja)
Other versions
JP3045461B2 (en
Inventor
Kiyoshi Ogata
清 緒方
Akio Yasukawa
明生 安川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
Kawasaki Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP7194769A priority Critical patent/JP3045461B2/en
Publication of JPH0941010A publication Critical patent/JPH0941010A/en
Application granted granted Critical
Publication of JP3045461B2 publication Critical patent/JP3045461B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Blast Furnaces (AREA)

Abstract

PROBLEM TO BE SOLVED: To prevent the leakage of a seal by reducing a filling pressure of monolithic refractory for casting, loaded to a mechanical seal applied to side joint surrounding staves, at the time of repairing the damaged part of a furnace wall by using the stave for repairing in a blast furnace. SOLUTION: The cast monolithic refractory supplied from a monolithic refractory supplying hole 12 at the lower side is cast in the supporting condition with a sprayed refractory layer 15 supplied and cast from a monolithic refractory supplying hole 13 at the upper side in order. Therefore, the pressure acted to the mechanical seal 10 by the head pressure of the monolithic refractory is reduced and it can be prevented that the mechanical seal 10 is pushed out in the direction in the furnace and leakage of the seal is eliminated.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[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の損
傷部補修方法に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for repairing a damaged portion of a blast furnace, which repairs a damaged portion of a blast furnace wall where refractories and staves have fallen off or worn.

【0002】[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。
2. Description of the Related Art Ore and coke charged from the upper part of a blast furnace gradually move downward, and undergo a reduction reaction in a high pressure and high temperature state to become molten pig iron and slag. In this process, the refractory material in the furnace is melted and lost due to chemical changes and physical wear, and the thickness is gradually reduced until a part of the refractory material disappears.

【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
が直接高熱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。
A stave, for example, is arranged and fixed between the refractory material in the furnace and the furnace shell as cooling means for the refractory material.
When the refractory is extinguished, the stave may be directly exposed to the high temperature furnace interior inserts and undergo erosion wear, which may even damage the cast cooling tubes inside. When the stave as a cooling means for refractories in the furnace is damaged in this way, the furnace shell is directly subjected to high heat load and cracks occur, causing CO
Gas leaks out of the furnace and is in an unsafe state, and also has defects in terms of strength, which shortens the blast furnace life significantly. Therefore, when repairing the blast furnace, all staves that play an important role in cooling the furnace body are usually replaced.

【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
露出部に配設して固定する。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のメカニカルシール
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。
[0004] However, in the intermediate renovation of the blast furnace by reduced blast, it is generally required that the cost be short and the cost is not so high. Therefore, the stave remains intact and only the damaged stave is repaired. Or it will be replaced. For example, in Japanese Patent Laid-Open No. 60-2607, a repair stave 20 having a precast refractory 23 on a stud 22 attached to the inside of a stave body 21 as shown in FIG. The removed furnace iron skin 24 is arranged and fixed on the exposed portion. In this state, after spraying an irregular shaped refractory from the inside of the furnace to the mechanical seal points of the end seal plate 26 and the overlapping plate 27 with the spray nozzle 29 to prevent leakage of the press-fit material, Irregular shaped refractory is press-fitted through the attached pressurizing port 25, and press-fitting material 28
What was repaired by forming a is disclosed.

【0005】[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、炉鉄
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(縦目地)が大
きいため、この縦目地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を形成する必要がある。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。
If the repairing stave 20 disclosed in the above-mentioned Japanese Patent Laid-Open No. 60-2607 is used, the furnace shell 24 can be heat-insulated and protected, but the stave body of the repairing stave. Since the gap (longitudinal joint) between 21 and the furnace skin 24 is large, it is necessary to form the press-fit material 28 by supplying a large amount of irregular shaped refractory material to this longitudinal joint. For this reason, not only the work time for pressurizing the irregular refractory uniformly into the gap but also the risk of insufficient insulation protection if the irregular refractory cannot be uniformly filled all the way .

【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、補修用ステーブ
の外周に形成される横目地に施したメカニカルシールに
不定形耐火物のヘッド圧が加わるのを軽減し、かつ断熱
保護を十分に確保することができ、さらに補修能率の優
れる高炉炉壁の損傷部補修方法を提供することを目的と
するものである。
The present invention solves the above-mentioned problems of the prior art, and when repairing a damaged interior wall of a furnace interior by reduced-scale deaeration, a repairing stave is used for good workability in a short time. It is possible to reduce the application of head pressure of irregular shaped refractory to the mechanical seal formed on the lateral joint formed on the outer periphery of the repair stave, and it is possible to sufficiently secure heat insulation protection, It is another object of the present invention to provide a method for repairing a damaged part of a blast furnace wall, which has excellent repair efficiency.

【0007】[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
皮を露出させた炉壁損傷部位に、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が形成されるよ
うにプレキャスト耐火物及び該補修用ステーブの外周に
形成される横目地の炉内側端部にメカニカルシールを施
工した補修用ステーブを所要数配設して固定した後、前
記所要数配設して固定した各補修用ステーブの上部と下
部とに対応させて炉鉄皮の上側と下側に不定形耐火物供
給口を配設し、まず下側の不定形耐火物供給口から流し
込み用不定形耐火物を流し込みにより目地まで充填して
流し込み耐火物層を形成し、次に上側の不定形耐火物供
給口から吹付け用不定形耐火物を吹付けにより充填して
前記流し込み耐火物層上に、次回の流し込み不定形耐火
物の流し込みヘッド圧を支持可能な吹付け耐火物層を形
成する手順を下段側から上段側の補修用ステーブに対し
て順次くり返し実施することを特徴とする高炉炉壁の損
傷部補修方法である。
SUMMARY OF THE INVENTION The present invention for achieving the above-mentioned object is intended to repair the blast furnace wall by lowering the contents inside the furnace to below the damaged part of the blast furnace wall by reduced scale deaeration. With the furnace wall damage site where the residual refractory of the damaged part or the furnace wall damaged part is removed and the furnace shell is exposed, the precast refractory is provided inside the furnace of the stave body and with the furnace shell outside the furnace. Required number of repair staves with mechanical seals on the furnace inner edge of the precast refractory and lateral joints formed on the outer periphery of the repair stave so that a flowable gap between the irregular shaped refractory is formed between them. After arranging and fixing, arranging the above-mentioned required number of fixed staves for repair corresponding to the upper and lower parts of the repair stave, and arranging the irregular refractory supply ports on the upper and lower sides of the furnace shell. First of all, the irregular refractory for pouring from the lower irregular refractory supply port. To fill the joints by pouring to form a pouring refractory layer, then from the upper irregular refractory supply port is sprayed by filling the irregular refractory for spraying on the pouring refractory layer, next time Damage to the blast furnace wall, characterized in that the procedure for forming a sprayed refractory layer capable of supporting the pouring head pressure of an indefinite shaped refractory is sequentially repeated for repair staves from the lower side to the upper side. It is a repair method.

【0008】また、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
て炉鉄皮を露出させた炉壁損傷部位に、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が形成さ
れるようにプレキャスト耐火物及び該補修用ステーブの
外周に形成される横目地の炉内側端部にメカニカルシー
ルを施工した補修用ステーブを所要数配設して固定した
後、前記所要数配設して固定した各補修用ステーブの上
部と下部とに対応させて炉鉄皮の上側と下側に不定形耐
火物供給口を配設し、まず下側の不定形耐火物供給口か
ら吹付け用不定形耐火物を吹付けにより目地まで充填し
て吹付け耐火物層を形成し、次に上側の不定形耐火物供
給口から流し込み用不定形耐火物を流し込みにより充填
して前記吹付け耐火物層上に流し込み耐火物層を形成す
る手順を下段側から上段側の補修用ステーブに対し順次
くり返し実施することを特徴とする高炉炉壁の損傷部補
修方法である。
[0008] Further, when repairing the blast furnace wall by lowering the contents inside the furnace to below the damaged part of the furnace wall by reduced-scale blast, the residual refractory material in the damaged part of the furnace wall or the damaged part of the furnace wall is removed. The precast refractory is provided inside the stave body inside the furnace wall where the furnace shell is exposed, and a flowable gap between the amorphous furnace and the furnace shell is formed outside the furnace. After fixing and fixing the required number of repair staves with a mechanical seal at the furnace inner end of the horizontal joint formed on the outer periphery of the precast refractory and the repair stave, the required number is set. Arrange unfixed refractory supply ports on the upper and lower sides of the furnace shell corresponding to the upper and lower parts of each fixed repair stave, and first from the unfixed refractory supply ports on the lower side. Filling the joints to the joints by spraying a standard refractory and spraying a refractory layer The procedure for forming a refractory layer on the sprayed refractory layer by filling the castable amorphous refractory from the upper irregular refractory supply port and then forming the refractory layer from the lower side to the upper side It is a method for repairing a damaged portion of a furnace wall of a blast furnace, which is characterized by sequentially repeating the steps for the staves for use.

【0009】[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(縦目地)は、不定形耐火物の流
動可能で均一な充填を行うことができる必要最少限な寸
法としている。
According to the present invention, there is provided a repair stave in which the precast refractory is provided inside the stave body inside the furnace, and the precast refractory is installed outside the furnace with a flowable gap between the irregular shaped refractory and the furnace shell. Used to repair the damaged part of the furnace wall. In this way, there is a thick precast refractory between the stave body and the furnace iron skin, and the gap (vertical joint) between the repair stave and the furnace iron skin is a uniform and flowable irregular refractory material. It has the minimum necessary size that can be filled.

【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る。また、本発明で
は、各補修用ステーブの上部と下部とに対応させて炉鉄
皮の上側と下側とに不定形耐火物供給口を配設し、下側
の不定形耐火物供給口から流動性の良好な流し込み不定
形耐火物を供給することによって該下側の不定形耐火物
供給口から補修用ステーブの外周に形成される目地まで
に亘り、余すところなく充填して均一な流し込み耐火物
層を形成することができる。
Therefore, a small amount of amorphous refractory is supplied from the pouring port provided in the iron shell of the furnace, so that the working time required for filling can be greatly shortened. Further, in the present invention, the irregular shaped refractory supply port is arranged on the upper side and the lower side of the furnace iron shell corresponding to the upper and lower parts of each repair stave, and from the lower shaped irregular refractory supply port. By supplying a castable refractory material with good fluidity, fill the entire area from the lower-shaped irregular refractory material supply port to the joint formed on the outer periphery of the repair stave and fill it with uniform pouring fireproofness. An object layer can be formed.

【0011】このようにして流し込み耐火物層を形成し
た状態で、上側の不定形耐火物供給口より流動性の劣る
吹付け用不定形耐火物を吹付けにより充填して前記流し
込み耐火物層上における間隙に保持力の大きい吹付け耐
火物層を形成する。この吹付け耐火物層が、次に流し込
まれる流し込み用不定形耐火物のヘッド圧を支持するの
で、補修用ステーブの外周に形成される目地の炉外側端
部に施したメカニカルシールに加わるヘッド圧を軽減す
ることができる。その結果、メカニカルシールからの流
し込み不定形耐火物のシール不備によるシール洩れを防
止することができる。
In the state where the cast refractory layer is formed in this manner, a spraying castable refractory having poorer fluidity than the upper castable refractory supply port is charged by spraying to fill the cast refractory layer. A sprayed refractory layer having a large holding force is formed in the gap. Since this sprayed refractory layer supports the head pressure of the cast indeterminate refractory to be poured next, the head pressure applied to the mechanical seal applied to the outer side end of the furnace of the joint formed on the outer periphery of the repair stave. Can be reduced. As a result, it is possible to prevent the leakage of the seal due to the imperfect seal of the cast refractory material from the mechanical seal.

【0012】また、不定形耐火物を充填する際、まず吹
付け用不定形耐火物を吹付けにより充填し、次に流し込
み用不定形耐火物を流し込みにより充填する手順とする
ことにより、流し込み用不定形耐火物より吹付け用不定
形耐火物の固化時間が短いことを利用して、充填作業の
時間短縮を図ることができる。
In addition, when filling the irregular refractory, first, the irregular refractory for spraying is filled by spraying, and then the irregular refractory for pouring is filled by pouring. The time required for the filling operation can be shortened by utilizing the fact that the solidification time of the irregular refractory for spraying is shorter than that of the irregular refractory.

【0013】[0013]

【実施例】【Example】

(実施例1)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。
(Embodiment 1) Hereinafter, the configuration and operation of the present invention will be described based on embodiments. FIG. 1 shows a vertical cross-sectional view after repairing a damaged portion of a furnace wall of a blast furnace according to the present invention using a repair stave.

【0014】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との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を施工してある。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。
As shown in FIG. 1, the repair stave 1 used in the present invention has a precast refractory 3 inside the furnace of a stave body 2 made of cast iron, which is the same as the conventional one. A precast refractory 4 having a thickness capable of forming a flowable gap S between the irregular shaped refractory and the furnace shell 7 is provided on the outer side. A protective pipe 6 is connected to the upper and lower sides of the stave body 2, and the casting water cooling pipe 5 is buried by casting through the protective pipe 6 as in the conventional case.

【0015】また、補修用ステーブ1の上部と下部に対
応させて炉鉄皮7には上側の不定形耐火物供給口13およ
び下側の不定形耐火物供給口12が上下の管座9の間に位
置させて配設してある。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、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。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。
In addition, the furnace iron shell 7 is provided with an upper irregular refractory supply port 13 and a lower irregular refractory supply port 12 in the upper and lower pipe seats 9 corresponding to the upper and lower portions of the repair stave 1. It is located between them. When repairing the blast furnace wall by lowering the furnace interior contents 8 below the damaged part of the blast furnace shaft caused by reduced-scale blast, the damaged existing stave was removed, and the remaining furnace fire resistance The object is removed to expose the back surface of the furnace shell 7. A repairing stave 1 prepared in advance is suspended from a furnace top manhole or an opening formed by cutting a furnace top iron shell via a wire, and the winch is unwound and hung down to face the repair portion.

【0016】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を配設して固定
したら、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
の間に形成される横目地の炉内側端部にシールプレート
等のシール材を施したメカニカルシール10を施す。この
メカニカルシール10だけでは不十分な場合には、メカニ
カルシール10の外側にシール押え板(図示せず)を炉内
側のプレキャスト耐火物3に固定して補強するようにし
てもよい。
After the upper and lower protective tubes 6 connected to the repair stave 1 are inserted through the upper and lower pipe seats 9 provided in the furnace shell 7, the gap S between the repair stave 1 and the furnace shell 7 is formed. The refractory is shaped so that it can flow, and is fixed to the upper and lower pipe seats 9 through the protective pipe 6. In this way, when the required number of repair staves 1 are arranged and fixed to the furnace wall repair section, the existing staves 1A arranged adjacent to the repair staves 1 and the repair staves 1 adjacent to the upper side are fixed. A mechanical seal (10) provided with a sealing material such as a seal plate is applied to the furnace inner end portion of the horizontal joint formed between them. If the mechanical seal 10 is not sufficient, a seal retainer plate (not shown) may be fixed to the outside of the mechanical seal 10 to reinforce the precast refractory 3 inside the furnace.

【0017】このようにしてステーブを配設した後、炉
鉄皮7に配設した下側の不定形耐火物供給口12から流し
込み用不定形耐火物を流し込みまたは圧入により供給
し、下側の不定形耐火物供給口12より下方の補修用ステ
ーブ1と炉鉄皮7とのなす間隙および周辺の目地に流し
込み用不定形耐火物を充填して流し込み耐火物層14を形
成する。かくして下側の不定形耐火物供給口12のレベル
近傍まで流し込み不定形耐火物を充填したら、その上方
に配設した上側の不定形耐火物供給口13に切替え、ここ
から吹付け用不定形耐火物を圧送して前記流し込み耐火
物層14の上方における縦目地に充填することによって吹
付け耐火物層15を形成する。
After arranging the staves in this way, the amorphous refractory for pouring is supplied by pouring or press-fitting from the lower irregular refractory material supply port 12 arranged in the furnace shell 7, and the lower side is supplied. A cast refractory layer 14 is formed by filling the castable refractory in the gap between the repair stave 1 and the furnace iron skin 7 below the irregular refractory supply port 12 and in the surrounding joints. In this way, after pouring to near the level of the lower irregular refractory supply port 12 and filling the irregular refractory, switch to the upper irregular refractory supply port 13 arranged above it, and spray from this irregular refractory The sprayed refractory layer 15 is formed by pumping the material and filling the vertical joints above the poured refractory layer 14.

【0018】上側の不定形耐火物供給口13のレベル近傍
まで吹付け用不定形耐火物を充填したら、当該補修用ス
テーブ1の上方に配設された補修用ステーブ1に対応し
て炉鉄皮7に設けた下側の不定形耐火物供給口12から流
し込み耐火物を流し込みにより充填するものである。こ
のとき流し込みにより供給される不定形耐火物のヘッド
圧は、吹付け耐火物層15によって支持される。このため
流し込み用不定形耐火物のヘッド圧が、下方のメカニカ
ルシール10に作用するのを軽減することができるので、
シール洩れの発生を防止することができる。
When the amorphous refractory for spraying is filled up to near the level of the upper irregular refractory supply port 13, the furnace iron skin corresponding to the repair stave 1 arranged above the repair stave 1 A refractory material is poured from a lower-shaped irregular refractory material supply port 12 provided in No. 7 to fill the refractory material by pouring. At this time, the head pressure of the amorphous refractory material supplied by pouring is supported by the sprayed refractory material layer 15. Therefore, it is possible to reduce the head pressure of the cast refractory that acts on the mechanical seal 10 below,
It is possible to prevent the occurrence of seal leakage.

【0019】補修用ステーブの目地にはシールプレート
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に設けた下側の不定形耐火物供給口12から
の流し込み用不定形耐火物および上側の不定形耐火物供
給口13からの吹付け用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て、それぞれ流し込み耐
火物層14および吹付け耐火物層15を形成した。目地の間
隙は約50mmであった。
A seal plate is applied to the joints of the repair stave, and the gap S formed between the repair stave and the furnace shell is set to 50 to 100 mm in consideration of the fluidity of the irregular refractory. Table 1 shows the amorphous refractories for pouring from the lower irregular refractory supply port 12 provided in the furnace shell 7 and the blowing irregular refractory from the upper irregular refractory supply port 13. The cast refractory layer 14 and the sprayed refractory layer 15 were formed using the properties and components. The joint gap was about 50 mm.

【0020】[0020]

【表1】 [Table 1]

【0021】表1に示すように、本発明で使用する流し
込み用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不定形耐火物層14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。一方、
吹付け用不定形耐火物は短時間で硬化して吹付け耐火物
層15を形成するので、その上方に充填される流し込み用
不定形耐火物のヘッド圧を早期に支持することが可能に
なる。その結果、下方の横目地に詰め込んだメカニカル
シール10に作用する圧力を軽減することが可能になり、
流し込み用不定形耐火物がメカニカルシール10を押し出
すことによるシール洩れを防止することができ、流し込
み用不定形耐火物の均一な充填が可能になる。
As shown in Table 1, the castable refractory used in the present invention is adjusted so that the curing time is extended to 3 to 5 hours in order to prevent the supply hose or the like from being solidified and clogged. Was used. Other properties are also good, and the amorphous refractory layer 14 can be formed under uniform filling, and the curing time after filling is 5.5 hours. on the other hand,
Since the sprayed amorphous refractory hardens in a short time to form the sprayed refractory layer 15, it becomes possible to quickly support the head pressure of the casting amorphous refractory filled above it. . As a result, it is possible to reduce the pressure acting on the mechanical seal 10 packed in the lower horizontal joint,
It is possible to prevent a seal leak caused by the cast-in amorphous refractory pushing out the mechanical seal 10, and it is possible to uniformly fill the cast-in irregular refractory.

【0022】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、その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。
The stave body 2 has a thickness of 240 mm, the furnace-side precast refractory 3 has a thickness of 150 mm, and the furnace-side precast refractory 4 has a thickness of 400 mm. The height and width of each step are taken into consideration in consideration of the size of the repaired portion. The damaged part of the furnace wall was repaired by combining repair staves of various sizes. The weight of the cast iron stave body in a typical repair stave was 5140 kg, and the weight of the precast refractory used for the front and back was 2556 kg, and the total weight was 7496 kg.

【0023】前記実施例では、炉鉄皮7に配設した下側
の不定形耐火物供給口12から流し込み用不定形耐火物を
流し込みにより充填する場合について説明したが、硬化
時間の短い吹付け耐火物層15の形成によりメカニカルシ
ールに作用する流し込み用不定形耐火物のヘッド圧を軽
減できるので、流し込み用不定形耐火物をメカニカルシ
ールを押し出すことのない許容限度において圧入するこ
とも可能である。これによって耐火物層14のより均一な
充填が達成できることになる。 (実施例2)実施例1の補修用ステーブ1、不定形耐火
物供給口12、13は同様であるが、まず最下層に位置する
ことになる部分へ不定形耐火物供給口から吹付け用不定
形耐火物を吹付けにより充填した。充填後、直ちに流し
込み用不定形耐火物の流し込みを行い間隙Sへの充填を
行った。
In the above-mentioned embodiment, the case was described in which the irregular refractory for pouring was filled from the lower irregular refractory supply port 12 provided in the furnace shell 7 by pouring. By forming the refractory layer 15 it is possible to reduce the head pressure of the casting indefinite refractory that acts on the mechanical seal, so it is possible to press the casting indefinite refractory into the allowable limit without pushing out the mechanical seal. . This allows more uniform filling of the refractory layer 14 to be achieved. (Embodiment 2) The repair stave 1 and the amorphous refractory supply ports 12 and 13 of Example 1 are the same, but the irregular refractory supply port is first sprayed to the portion to be located in the lowermost layer. Irregular refractories were filled by spraying. Immediately after the filling, the insulative refractory for pouring was poured to fill the gap S.

【0024】順次、この操作をくり返し、間隙Sの充填
を完了した。最下層は、順次不定形耐火物が充填されて
いくため、初期シールが問題であり、流し込み用不定形
耐火物の流し込み充填では、ある程度の固化を待って、
次の施工に入ることが充填耐火物の洩れ防止のため必要
となる。本例では、最初の充填に吹付け用不定形耐火物
による吹付け操作をとるため、吹付けによる施工では固
化が早く、吹付け充填完了後、直ちに次の流し込み用耐
火物の流し込みが可能となるため、補修作業が連続化で
きる利点がある。
This operation was repeated successively to complete the filling of the gap S. The bottom layer is filled with amorphous refractory in order, so the initial seal is a problem, and in the pouring and filling of irregular refractory for pouring, wait for some solidification,
It is necessary to start the next construction to prevent leakage of the filled refractory. In this example, since the spraying operation with the spraying irregular shaped refractory is taken for the first filling, the solidification is quick in the construction by spraying, and it is possible to pour the next pouring refractory immediately after the completion of the spray filling. Therefore, there is an advantage that the repair work can be continued.

【0025】なお、本発明はステーブとは異なる冷却手
段たとえば冷却函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。
The present invention can also be applied to repair the damaged portion of the furnace wall of the blast furnace provided with a cooling means different from the stave, such as a cooling box.

【0026】[0026]

【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
す縦目地および補修用ステーブの周辺に形成される横目
地に不定形耐火物を供給する量が少量で済むので、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。
As described above, according to the present invention, the precast refractory is provided not only on the inside of the stave body but also on the outside of the furnace, and the gap formed between the repairing stave and the furnace iron shell is not formed. It is set as a necessary minimum to allow the flow of standard refractories. For this reason, irregular shaped refractory is formed in the longitudinal joints formed by the repair stave and the furnace steel skin after the required number of repair staves have been fixedly installed in the furnace wall repair section, and in the lateral joints formed around the repair stave. Since only a small amount of gas is required to be supplied, the repair work time required for filling can be greatly shortened.

【0027】また補修用ステーブの周辺に形成される横
目地には流動性のよい流し込み用不定形耐火物を供給す
るのですみずみまで均一に充填することができる。流し
込み用不定形耐火物のヘッド圧は吹付け耐火物層より支
持されるので、下方のメカニカルシールに作用する圧力
が軽減され、メカニカルシールの炉内側への押し出しに
よるシール洩れを防止することができる。
The lateral joints formed around the repairing stave are supplied with a flowable amorphous refractory so that the filling can be evenly filled. Since the head pressure of the cast refractory is supported by the sprayed refractory layer, the pressure acting on the lower mechanical seal is reduced, and seal leakage due to pushing the mechanical seal into the furnace can be prevented. .

【0028】流し込み耐火物層と吹付け耐火物層との組
み合わせによって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に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高炉炉壁の寿命延長が達成され
る。
By combining the cast-in refractory layer and the sprayed refractory layer, it is possible to fill the irregular refractory material to every corner, so that the furnace shell can be adiabatically protected during the operation of the blast furnace, and the repair stave and furnace iron can be protected. Since the back wind that flows between the leather and the skin can be reliably prevented, the life of the furnace wall of the blast furnace is extended.

【図面の簡単な説明】[Brief description of drawings]

【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。
FIG. 1 is a vertical cross-sectional view showing a structure for repairing a furnace wall of a blast furnace according to an embodiment of the present invention with a stave.

【図2】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。
FIG. 2 is a transverse cross-sectional view showing a structure for repairing a furnace wall of a blast furnace according to a conventional example by a stave.

【符号の説明】[Explanation of symbols]

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 メカニカルシール 11 シール押え板 12 不定形耐火物供給口(下側) 13 不定形耐火物供給口(上側) 14 流し込み耐火物層 15 吹付け耐火物層 1 Repair stave 2 Stave main body 3 Precast refractory (inside the furnace) 4 Precast refractory (outside the furnace) 5 Casting water cooling pipe 6 Protective tube 7 Furnace iron skin 8 Furnace interior filling 9 Pipe seat 10 Mechanical seal 11 Seal holding plate 12 Irregular refractory supply port (lower side) 13 Irregular refractory supply port (upper side) 14 Cast refractory layer 15 Sprayed refractory layer

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 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
鉄皮を露出させた炉壁損傷部位に、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が形成される
ようにプレキャスト耐火物及び該補修用ステーブの外周
に形成される横目地の炉内側端部にメカニカルシールを
施工した補修用ステーブを所要数配設して固定した後、
前記所要数配設して固定した各補修用ステーブの上部と
下部とに対応させて炉鉄皮の上側と下側に不定形耐火物
供給口を配設し、まず下側の不定形耐火物供給口から流
し込み用不定形耐火物を流し込みにより目地まで充填し
て流し込み耐火物層を形成し、次に上側の不定形耐火物
供給口から吹付け用不定形耐火物を吹付けにより充填し
て前記流し込み耐火物層上に、次回の流し込み不定形耐
火物の流し込みヘッド圧を支持可能な吹付け耐火物層を
形成する手順を下段側から上段側の補修用ステーブに対
し順次くり返し実施することを特徴とする高炉炉壁の損
傷部補修方法。
1. When repairing the blast furnace wall by lowering the contents inside the furnace to below the damaged part of the furnace wall by reduced-scale deaeration, the residual refractory material in the damaged part of the furnace wall or the damaged part of the furnace wall is removed. The precast refractory is provided inside the stave body inside the furnace wall where the furnace shell is exposed, and a flowable gap between the amorphous furnace and the furnace shell is formed outside the furnace. After fixing and fixing a required number of repair staves with a mechanical seal at the furnace inner end of the horizontal joint formed on the outer periphery of the precast refractory and the repair stave,
The irregular shaped refractory supply ports are arranged on the upper side and the lower side of the furnace iron shell so as to correspond to the upper portion and the lower portion of each repair stave fixed and arranged in the required number, and first, the lower shaped irregular refractory material is provided. From the supply port, fill the irregular refractory for pouring to the joints by pouring to form a pouring refractory layer, and then fill the irregular refractory for spraying from the upper irregular refractory supply port by spraying. On the cast refractory layer, the procedure of forming a sprayed refractory layer capable of supporting the pouring head pressure of the next cast indeterminate refractory material is sequentially repeated from the lower stage to the upper stave for repair. Characteristic method of repairing damaged parts of blast furnace wall.
【請求項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
鉄皮を露出させた炉壁損傷部位に、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が形成される
ようにプレキャスト耐火物及び該補修用ステーブの外周
に形成される横目地の炉内側端部にメカニカルシールを
施工した補修用ステーブを所要数配設して固定した後、
前記所要数配設して固定した各補修用ステーブの上部と
下部とに対応させて炉鉄皮の上側と下側に不定形耐火物
供給口を配設し、まず下側の不定形耐火物供給口から吹
付け用不定形耐火物を吹付けにより目地まで充填して吹
付け耐火物層を形成し、次に上側の不定形耐火物供給口
から流し込み用不定形耐火物を流し込みにより充填して
前記吹付け耐火物層上に流し込み耐火物層を形成する手
順を下段側から上段側の補修用ステーブに対し順次くり
返し実施することを特徴とする高炉炉壁の損傷部補修方
法。
2. When repairing the blast furnace wall by lowering the furnace interior contents below the furnace wall damaged part by reduced-scale blast, the residual refractory material in the furnace wall damaged part or the furnace wall damaged part is removed. The precast refractory is provided inside the stave body inside the furnace wall where the furnace shell is exposed, and a flowable gap between the amorphous furnace and the furnace shell is formed outside the furnace. After fixing and fixing a required number of repair staves with a mechanical seal at the furnace inner end of the horizontal joint formed on the outer periphery of the precast refractory and the repair stave,
The irregular shaped refractory supply ports are arranged on the upper side and the lower side of the furnace iron shell so as to correspond to the upper portion and the lower portion of each repair stave fixed and arranged in the required number, and first, the lower shaped irregular refractory material is provided. Fill the joints by spraying the amorphous refractory for spraying from the supply port to form a sprayed refractory layer, and then fill the irregular refractory for pouring by pouring from the upper amorphous refractory supply port. A method for repairing a damaged portion of a furnace wall of a blast furnace, characterized in that a procedure for forming a refractory layer by pouring on the sprayed refractory layer is sequentially repeated from a lower stave to an upper stave for repair.
JP7194769A 1995-07-31 1995-07-31 Repair method of damaged part of blast furnace wall Expired - Lifetime JP3045461B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7194769A JP3045461B2 (en) 1995-07-31 1995-07-31 Repair method of damaged part of blast furnace wall

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7194769A JP3045461B2 (en) 1995-07-31 1995-07-31 Repair method of damaged part of blast furnace wall

Publications (2)

Publication Number Publication Date
JPH0941010A true JPH0941010A (en) 1997-02-10
JP3045461B2 JP3045461B2 (en) 2000-05-29

Family

ID=16329944

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7194769A Expired - Lifetime JP3045461B2 (en) 1995-07-31 1995-07-31 Repair method of damaged part of blast furnace wall

Country Status (1)

Country Link
JP (1) JP3045461B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013036052A (en) * 2011-08-03 2013-02-21 Jfe Steel Corp Method for repairing damaged part of blast furnace body
CN113260716A (en) * 2018-12-13 2021-08-13 保罗沃思公司 Method for protecting the inner wall of a shaft furnace

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013036052A (en) * 2011-08-03 2013-02-21 Jfe Steel Corp Method for repairing damaged part of blast furnace body
CN113260716A (en) * 2018-12-13 2021-08-13 保罗沃思公司 Method for protecting the inner wall of a shaft furnace

Also Published As

Publication number Publication date
JP3045461B2 (en) 2000-05-29

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