JP2011074462A - Method for removing stave-cooler - Google Patents

Method for removing stave-cooler Download PDF

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JP2011074462A
JP2011074462A JP2009227691A JP2009227691A JP2011074462A JP 2011074462 A JP2011074462 A JP 2011074462A JP 2009227691 A JP2009227691 A JP 2009227691A JP 2009227691 A JP2009227691 A JP 2009227691A JP 2011074462 A JP2011074462 A JP 2011074462A
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stave cooler
blast furnace
cooler
stave
furnace
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JP5348719B2 (en
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Yuji Hirao
Mitsuyoshi Motoyashiki
Hiroshi Takasaki
充良 元屋敷
裕二 平尾
洋 高崎
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Nippon Steel Engineering Co Ltd
新日鉄エンジニアリング株式会社
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Abstract

<P>PROBLEM TO BE SOLVED: To exchange a stave-cooler without damaging the body of the stave-cooler for remaining flow and the water supply/exhaust tube. <P>SOLUTION: A combining member, which is combined with the stave-cooler 1 projecting from the opening hole 4 in a blast furnace iron-shell 2 to the outside, is removed, and a plurality of blasting chemicals filling holes are bored in a monolithic refractory 9 between the stave-cooler 1 and the blast furnace iron-shell 2 through the opening hole 4 in the blast furnace iron-shell 2 appeared by the removal of the combining member. Then, the blasting chemicals of the amount without affecting the adjacent stave-cooler for existing flow are charged into the blasting chemicals filling hole, and the monolithic refractory 9 is cracked by blasting and the indefinite refractory 9 is crushed with water-jet 13 from the opening hole 4 in the blast furnace iron-shell 2. After removing the stave-cooler by being pushed to the furnace inside from the furnace wall, the stave-cooler is withdrawn to the out of the blast furnace, and after brushing down the remained monolithic refractory 9 into the furnace by utilizing the opening hole part in the blast furnace iron-shell, the stave-cooler for renewing is installed from the furnace inside. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、高炉等の側壁の冷却に用いられるステーブクーラに関し、特に、損傷したステーブクーラを撤去し、その場所へ予め製作した更新用ステーブクーラを据え付けるステーブクーラの交換方法に関する。   The present invention relates to a stave cooler used for cooling a side wall of a blast furnace or the like, and more particularly, to a method for replacing a stave cooler in which a damaged stave cooler is removed and a renewed stave cooler is preinstalled at the place.
高炉の炉壁を冷却するために、高炉の円周方向及び上下方向に多数のステーブクーラが高炉鉄皮の内側に固定されている。図10に示すように、ステーブクーラ1は、ステーブクーラ1の冷却水配管の給排水口に給排水取出管3が溶接され、給排水取出管3は、高炉鉄皮2の開口4から高炉の炉内ガスが外側に漏れないように開口4を塞いでいるシールプレート5に固定されている保護管6を通して高炉鉄皮2の外側に突出している。ステーブクーラ1は、固定ボルト7により高炉鉄皮2に固定されている。また、圧力計や温度計を挿入する短管8も設けられている。ステーブクーラ1と高炉鉄皮2との間には不定形耐火物9が充填されている。   In order to cool the furnace wall of the blast furnace, a number of stave coolers are fixed inside the blast furnace core in the circumferential direction and the vertical direction of the blast furnace. As shown in FIG. 10, in the stave cooler 1, a water supply / drainage extraction pipe 3 is welded to the water supply / drainage port of the cooling water pipe of the stave cooler 1, and the water supply / drainage extraction pipe 3 is connected to the blast furnace gas from the opening 4 of the blast furnace core 2. Projecting to the outside of the blast furnace iron shell 2 through a protective tube 6 fixed to a seal plate 5 blocking the opening 4 so as not to leak outside. The stave cooler 1 is fixed to the blast furnace iron skin 2 with fixing bolts 7. A short tube 8 into which a pressure gauge or a thermometer is inserted is also provided. An amorphous refractory 9 is filled between the stave cooler 1 and the blast furnace core 2.
ステーブクーラが長期間の使用又は異常摩耗により損傷した場合、損傷したステーブクーラを炉壁から撤去し、その後に更新用ステーブクーラを取り付けて交換することが行われており、ステーブクーラの交換の際に、不定形耐火物の除去にダイナマイト発破を利用する方法が知られている(特許文献1の「従来技術」参照)。   When the stave cooler is damaged due to long-term use or abnormal wear, the damaged stave cooler is removed from the furnace wall and then replaced with a replacement stave cooler. In addition, there is known a method of using dynamite blasting for removal of an irregular refractory (see “Prior Art” in Patent Document 1).
特許文献1に記載のダイナマイト発破を利用する方法は、図11に示すように、損傷ステーブクーラ31を除去し、更新用ステーブクーラ32を取り付けるために、更新用ステーブクーラ32より大きな空間を確保し、更新用ステーブクーラ32と残存不定形耐火物33との間に別途不定形耐火物を充填するために鉄皮34側の残存不定形耐火物33を除去する必要があることから、残存流用ステーブクーラ35の近傍でダイナマイト発破36を行うことにより、残存不定形耐火物3の解体を行っている。   As shown in FIG. 11, the method using the dynamite blast described in Patent Document 1 secures a larger space than the renewal stave cooler 32 in order to remove the damaged stave cooler 31 and attach the renewal stave cooler 32. In order to separately fill the amorphous refractory 33 between the renewal stave cooler 32 and the remaining amorphous refractory 33, it is necessary to remove the residual amorphous refractory 33 on the iron shell 34 side. By performing dynamite blasting 36 in the vicinity of the cooler 35, the remaining amorphous refractory 3 is disassembled.
特開2000−304456号公報JP 2000-304456 A
前記特許文献1記載のダイナマイトのみによる発破で不定形耐火物を除去する方法では、交換が必要な損傷ステーブクーラ1と隣接する残存流用ステーブクーラ5と鉄皮4間に衝撃が作用し、残存流用するステーブクーラ5の本体および給排水管7に過大な力が作用し、(1)給排水管7を破壊してしまう、(2)残存流用ステーブクーラへ作用する発破による衝撃で、該ステーブクーラと不定形耐火物との間に隙間が生じ、該隙間に操業時の高温ガスが進入して、ステーブクーラを劣化させる、という問題がある。   In the method of removing the irregular refractory by blasting only with dynamite described in Patent Document 1, an impact acts between the damaged stub cooler 1 that needs to be replaced and the adjacent diverted stave cooler 5 and the iron skin 4, and the remaining diverted An excessive force acts on the main body of the stave cooler 5 and the water supply / drainage pipe 7, and (1) the water supply / drainage pipe 7 is destroyed. There is a problem that a gap is formed between the fixed refractory and high temperature gas enters the gap to deteriorate the stave cooler.
そこで、本発明は、発破を使用して高炉のステーブクーラを交換する際に、残存するステーブクーラの本体および給排水管に損傷を与えることなくステーブクーラの交換を可能とするステーブクーラの交換方法を提供する。   Therefore, the present invention provides a method for replacing a stave cooler that enables replacement of a stave cooler without damaging the main body of the remaining stave cooler and the water supply / drainage pipe when replacing the blast furnace stave cooler using blasting. provide.
本発明のステーブクーラの交換方法は、高炉の炉壁から損傷したステーブクーラを撤去し、撤去した場所へ更新用のステーブクーラを据え付けるステーブクーラの交換方法において、ステーブクーラと高炉鉄皮に結合されて高炉鉄皮の開口から炉外側へ突出している結合部材を除去し、結合部材の除去により現れた高炉鉄皮の開口を通してステーブクーラと高炉鉄皮との間に充填されている不定形耐火物へ複数の発破用薬剤充填孔を穿孔し、発破用薬剤充填孔へ隣接する既存流用ステーブクーラに影響を与えない量の発破用薬剤を充填して発破をかけて不定形耐火物に亀裂を発生させ、亀裂が発生した不定形耐火物を高炉鉄皮の開口からウォータジェットにより破砕し、ステーブクーラを炉壁から炉内側に押して取り外した後、高炉外へ撤去し、ステーブクーラと高炉鉄皮間に残存していた不定形耐火物を前記高炉鉄皮の開口部を利用して炉内へ払い落とした後に、ステーブクーラを撤去した場所へ更新用ステーブクーラを炉内側から据え付けることを特徴とする。   The stave cooler replacement method of the present invention is a stave cooler replacement method in which the damaged stave cooler is removed from the furnace wall of the blast furnace, and the renewal stave cooler is installed at the removed location. The unfixed refractory filled between the stave cooler and the blast furnace iron shell through the opening of the blast furnace iron shell that appears by removing the coupling member is removed from the opening of the blast furnace iron shell. A plurality of blasting agent filling holes are drilled into the blasting agent filling hole, and an amount of blasting agent that does not affect the existing diverting stave cooler adjacent to the blasting agent filling hole is filled and blasted to generate cracks in the amorphous refractory. The refractory that has cracked is crushed by a water jet from the opening of the blast furnace iron skin, removed from the furnace wall by pushing the stave cooler into the furnace, and then removed from the blast furnace. After removing the irregular refractory material remaining between the stave cooler and the blast furnace iron core into the furnace using the opening of the blast furnace iron crust, install the renewal stave cooler to the place where the stave cooler was removed. It is characterized by being installed from the inside.
前記構成において、撤去するステーブクーラと隣接する既存流用ステーブクーラの境界にある高炉鉄皮に目地切り用の開口を設け、目地切り用の開口からウォータジェットにより目地及び目地と高炉鉄皮間の不定形耐火物を破砕して分離することを特徴とする。   In the above-described configuration, an opening for joint cutting is provided in the blast furnace iron skin at the boundary of the existing stave cooler adjacent to the stave cooler to be removed, and a joint between the joint and the joint and the blast furnace iron skin is formed by a water jet from the joint cutting opening. It is characterized by crushing and separating regular refractories.
また、撤去するステーブクーラの背面と高炉鉄皮との間の不定形耐火物を排出し、不定形耐火物を充填する隙間を設けることを特徴とする。また、高炉鉄皮に固定した複数のジャッキ受けに配置したジャッキにより炉外からステーブクーラを炉内側に押して撤去することを特徴とする。   Further, the present invention is characterized in that an irregular refractory between the back surface of the stave cooler to be removed and the blast furnace iron shell is discharged, and a gap for filling the irregular refractory is provided. Moreover, the stave cooler is pushed and removed from the outside of the furnace to the inside of the furnace by jacks arranged on a plurality of jack receptacles fixed to the blast furnace iron skin.
本発明は初めに耐火物に発破をかけ、耐火物に亀裂を発生させた後、ウォータジェットにより耐火物を破砕し系外へ排出する。したがって、本発明の発破は、従来のダイナマイトのみによる発破で耐火物を破砕する方法に比べて、耐火物に亀裂を生じさせるだけなのでその衝撃が弱く、その後のウォータジェットによる高圧水の噴射により耐火物を破砕させる。以上により、本発明における発破及びウォータジェットの実施において、損傷ステーブクーラの近傍の残存流用ステーブクーラと鉄皮間の衝撃力は弱く、近傍の残存流用ステーブクーラの給排水管には、小さな力が作用する。このため給排水管の破壊は生じない。   In the present invention, the refractory is first blasted and cracked in the refractory, and then the refractory is crushed by a water jet and discharged out of the system. Therefore, the blasting of the present invention is less impact than the conventional method of crushing the refractory by blasting only with dynamite, so that the impact is weak, and the refractory by the injection of high pressure water by the water jet thereafter. Shatter things. As described above, in the blasting and water jet implementation of the present invention, the impact force between the residual flow stave cooler near the damaged stave cooler and the iron skin is weak, and a small force acts on the water supply / drainage pipe of the residual flow stave cooler in the vicinity. To do. For this reason, destruction of the water supply / drainage pipe does not occur.
また、残存流用ステーブクーラへ作用する衝撃力が小さため該ステーブクーラと不定形耐火物との間に隙間が生じるのを抑えることができるので、該隙間に操業時の高温ガスが進入して、ステーブクーラを劣化させることもない。
取替えするステーブクーラの背面と高炉本体鉄皮との間にキャスタブル充填隙間を設けるように旧キャスタブルを撤去するため、取替えステーブクーラの配置後、キャスタブルの確実な充填が容易に可能となり冷却機能の維持が可能である。
In addition, since the impact force acting on the remaining flow stave cooler is small, it is possible to suppress the formation of a gap between the stave cooler and the irregular refractory, so that hot gas during operation enters the gap, There is no deterioration of the stave cooler.
The old castable is removed so that a castable filling gap is provided between the back of the stave cooler to be replaced and the blast furnace body skin. Therefore, after the replacement stave cooler is placed, it is easy to reliably fill the castable and maintain the cooling function. Is possible.
結合部材を除去した状態の側面を示す図である。It is a figure which shows the side surface of the state which removed the coupling member. 鉄皮開口の耐火物に発破用薬剤充填孔を穿孔した状態を示す図である。It is a figure which shows the state which punched the chemical | medical agent filling hole for blasting to the refractory material of an iron-skin opening. 不定形耐火物に向けてウォータジェットノズルから超高圧水を噴射させる状態を示す図である。It is a figure which shows the state which injects super-high pressure water from a water jet nozzle toward an indefinite form refractory. 吊りチェーンをステーブクーラの作業用孔に固定する作業の説明図である。It is explanatory drawing of the operation | work which fixes a suspension chain to the work hole of a stave cooler. ジャッキでステーブクーラを炉内側に押す状態を示す図である。It is a figure which shows the state which pushes a stave cooler inside a furnace with a jack. ステーブクーラが炉内側に押し出された状態を示す図である。It is a figure which shows the state by which the stave cooler was extruded inside the furnace. 更新用ステーブクーラを吊りチェーンに吊り下げた状態を示す図である。It is a figure which shows the state which suspended the renewal stave cooler on the suspension chain. 更新用ステーブクーラを高炉鉄皮に引き寄せの状態を示す図である。It is a figure which shows the state of pulling up the stave cooler for update to a blast furnace iron skin. 目地きりの説明図で、(a)は側面を示す図、(b)は同正面を示す図である。It is explanatory drawing of joint area, (a) is a figure which shows a side surface, (b) is a figure which shows the same front. ステーブクーラを炉壁に配設した状態を示す図である。It is a figure which shows the state which has arrange | positioned the stave cooler to the furnace wall. 従来のステーブクーラの交換作業の説明図である。It is explanatory drawing of the replacement | exchange operation | work of the conventional stave cooler.
図面を参照しながら本発明の実施例により説明する。   Embodiments of the present invention will be described with reference to the drawings.
工程1
ステーブクーラを炉壁から撤去するためには、ステーブクーラを高炉鉄皮から分離可能な状態にする必要がある。
Process 1
In order to remove the stave cooler from the furnace wall, it is necessary to make the stave cooler separable from the blast furnace iron skin.
そこで、図10に示す、高炉鉄皮2から炉外側へ突出している給排水取出管3、シールプレート5、保護管6、固定ボルト7、短管8等の、ステーブクーラ1と高炉鉄皮2を結合している結合部材を切断、除去し、図1に示すように、ステーブクーラ1と高炉鉄皮2とを分離可能な状態にする。   Therefore, a stave cooler 1 and a blast furnace core 2 such as a water supply / drainage extraction pipe 3, a seal plate 5, a protective pipe 6, a fixing bolt 7, a short pipe 8, etc., which are shown in FIG. The coupling members that are coupled are cut and removed, so that the stave cooler 1 and the blast furnace core 2 are separable as shown in FIG.
結合部材の除去により高炉鉄皮2の開口4が現れ、高炉鉄皮2の開口内には結合部材の切り口10の回りにステーブクーラ1と高炉鉄皮2との間に充填されている不定形耐火物9が現れる。   The opening 4 of the blast furnace iron shell 2 appears by the removal of the coupling member, and the irregular shape filled between the stave cooler 1 and the blast furnace iron core 2 around the cut 10 of the coupling member in the opening of the blast furnace iron shell 2. Refractory 9 appears.
工程2
図2において、結合部材の除去により高炉鉄皮2の開口4に現れた耐火物9に複数の発破用薬剤充填孔11を穿孔する。発破用薬剤充填孔11の径や数は、発破の際に、撤去するステーブクーラ1に隣接する残存ステーブクーラ12や給排水管3に影響を及ぼさず且つ耐火物9に亀裂を発生させるように、発破用薬剤の種類や大きさなどにより決定する。例えば、直径17mm、長さ25mmのミニ発破を使用する場合、発破用薬剤充填孔8は直径20mmとする。
Process 2
In FIG. 2, a plurality of blasting drug filling holes 11 are drilled in the refractory 9 appearing in the opening 4 of the blast furnace core 2 by removing the coupling member. The diameter and number of the blasting chemical filling holes 11 do not affect the remaining stave cooler 12 and the water supply / drainage pipe 3 adjacent to the stave cooler 1 to be removed, and cause cracks in the refractory 9 when blasting. It is determined by the type and size of the blasting agent. For example, when a mini blast having a diameter of 17 mm and a length of 25 mm is used, the blasting drug filling hole 8 has a diameter of 20 mm.
工程3
発破用薬剤を発破用薬剤充填孔11へ充填した後、発破をかけて不定形耐火物9に亀裂を発生させる。発破用薬剤は、不定形耐火物9に亀裂を発生させるだけであるから、少量で済む。発破用薬剤は、爆発力が小さい薬剤、例えば、10g以下の薬包に加工して使用する。
Process 3
After filling the blasting agent into the blasting agent filling hole 11, blasting is performed to cause the amorphous refractory 9 to crack. Since the blasting agent only causes cracks in the amorphous refractory 9, only a small amount is required. The blasting drug is used by processing it into a drug having a small explosive power, for example, a medicine bag of 10 g or less.
工程4
図3に示すように、高炉鉄皮2の開口4から亀裂が発生した不定形耐火物9に向けてウォータジェットノズル13から超高圧水を噴射させて耐火物9を破砕する。ウォータジェットは約100MPa以上の高圧水を噴射し、耐火物9には亀裂が入っているので容易に破砕可能である。
Process 4
As shown in FIG. 3, the refractory 9 is crushed by injecting ultra-high pressure water from a water jet nozzle 13 toward the irregular refractory 9 in which a crack has occurred from the opening 4 of the blast furnace iron shell 2. The water jet injects high-pressure water of about 100 MPa or more, and the refractory 9 is cracked and can be easily crushed.
工程5
図4において、ステーブクーラ1を炉壁から炉内側に取り外し、炉外へ撤去するため、まず高炉鉄皮2とステーブクーラ1に炉内外を連通する作業用孔14をドリルにより貫通させる。作業用孔14には高炉の炉頂に形成した開口から降ろされている電動チェーンブロックの吊りチェーンを通すための孔である。
Process 5
In FIG. 4, in order to remove the stave cooler 1 from the furnace wall to the inside of the furnace and remove it outside the furnace, first, the work hole 14 communicating with the inside and outside of the blast furnace iron shell 2 and the stave cooler 1 is penetrated by a drill. The work hole 14 is a hole through which the suspension chain of the electric chain block lowered from the opening formed at the top of the blast furnace is passed.
さらに図5に示すように、ステーブクーラ1を炉内側に押すため、ジャッキ15のピストン棒16が通る開口17を高炉鉄皮2に形成する。高炉鉄皮2にジャッキ受け15aを固定し、ジャッキ15を配置する。   Further, as shown in FIG. 5, an opening 17 through which the piston rod 16 of the jack 15 passes is formed in the blast furnace core 2 in order to push the stave cooler 1 toward the inside of the furnace. The jack receiver 15a is fixed to the blast furnace iron skin 2, and the jack 15 is disposed.
図4にもどって、ステーブクーラ1の炉内側への押し出しは、高炉の炉頂に形成した開口から電動チェーンブロックの吊りチェーン18が降ろされ、吊りチェーン18に結ばれたガイドワイヤ19を、ステーブクーラ1と高炉鉄皮2を連通する作業用孔14を通して引き寄せ棒20で引っ掛けて高炉鉄皮2の炉外側に引き出した後、吊りチェーン18を固定金具でステーブクーラ1に固定する。   Referring back to FIG. 4, the stave cooler 1 is pushed out into the furnace. The suspension chain 18 of the electric chain block is lowered from the opening formed in the top of the furnace of the blast furnace, and the guide wire 19 connected to the suspension chain 18 is moved to the stave. After being pulled by the pulling rod 20 through the working hole 14 for communicating the cooler 1 and the blast furnace iron skin 2 and pulled out to the outside of the furnace of the blast furnace iron skin 2, the suspension chain 18 is fixed to the stave cooler 1 with a fixing bracket.
次いで、図5、図6に示すように、ジャッキ15のピストン棒16でステーブクーラ1を炉内側に押し、炉壁から取り外す。高炉鉄皮2から分離して炉内側に押し出されたステーブクーラ1は、吊りチェーン18に吊り下げられ、電動チェーンブロックにより炉頂に向けて巻き上げられ、炉外に搬出される。   Next, as shown in FIGS. 5 and 6, the stave cooler 1 is pushed into the furnace with the piston rod 16 of the jack 15 and is removed from the furnace wall. The stave cooler 1 separated from the blast furnace core 2 and pushed out to the inside of the furnace is suspended by a suspension chain 18, wound up toward the top of the furnace by an electric chain block, and carried out of the furnace.
工程6
ステーブクーラ1が撤去された後、ステーブクーラ1と高炉鉄皮2間に残存していた不定形耐火物9を高炉鉄皮2の開口部4を利用して払落とし手段により炉内へ払い落とす。
Step 6
After the stave cooler 1 has been removed, the amorphous refractory 9 remaining between the stave cooler 1 and the blast furnace core 2 is removed into the furnace by means of the withdrawal using the opening 4 of the blast furnace core 2. .
工程7
図7において、高炉の炉頂に形成した開口から電動チェーンブロックの吊りチェーン18に更新用ステーブクーラ21を吊り下げ、撤去したステーブクーラ1のあった位置まで降ろし、更新用ステーブクーラ21の下部に結ばれたワイヤ22を高炉鉄皮2の開口4を通して引き寄せ棒で引っ掛けて高炉鉄皮2の炉外側に引き出した後、更新用ステーブクーラ21を引き寄せる。
Step 7
In FIG. 7, the renewal stave cooler 21 is suspended from the opening formed in the top of the blast furnace to the suspension chain 18 of the electric chain block, lowered to the position where the removed stave cooler 1 was, and is placed below the renewal stave cooler 21. The tied wire 22 is hooked with an attracting rod through the opening 4 of the blast furnace core 2 and pulled out of the furnace of the blast furnace core 2, and then the renewal stave cooler 21 is pulled.
次いで、図8に示すように、更新用スーブクーラ21の上部を引き寄せてステーブクーラ1を高炉鉄皮2に配置する。その後、ステーブクーラ1を固定ボルトで高炉鉄皮に固定し、ステーブクーラ内の冷却水配管の給排水口に給排水取出管を溶接する。その後、ステーブクーラ1と高炉鉄皮2との間に不定形耐火物を充填する。   Next, as shown in FIG. 8, the upper portion of the renewal subcooler 21 is pulled up to place the stave cooler 1 on the blast furnace core 2. Thereafter, the stave cooler 1 is fixed to the blast furnace iron shell with fixing bolts, and the water supply / drainage extraction pipe is welded to the water supply / drainage port of the cooling water pipe in the stave cooler. Thereafter, an amorphous refractory is filled between the stave cooler 1 and the blast furnace core 2.
本実施例は、撤去するステーブクーラと、このステーブクーラに隣接する残存流用ステーブクーラ12との間に目地耐火材が残らないようにして、残存する耐火物から破砕した耐火物を効率よく分離することができるとともに、耐火物除去後の位置に交換用ステーブクーラを容易に位置決め可能となる。   In this embodiment, the jointed refractory material is efficiently separated from the remaining refractory so that the joint refractory does not remain between the stave cooler to be removed and the remaining-flow stave cooler 12 adjacent to the stave cooler. In addition, the replacement stave cooler can be easily positioned at the position after removal of the refractory.
図9において、ステーブクーラ1とこのステーブクーラ1に隣接する残存流用ステーブクーラ12との両側の境界上の目地に位置する高炉鉄皮2に複数の目地切り用孔22を穿孔する。穿孔はコアドリルモータを鉄皮にセットしてドリルを前進させて実施する。なお、ステーブクーラ1の上下の開口4は残存ステーブクーラ12の近傍にあるため、目地切り用孔22を、穿孔を設けなくてもウォータジェット13aにより容易に目地切りすることができるので、目地切り用孔を設ける必要はない。   In FIG. 9, a plurality of joint cutting holes 22 are drilled in the blast furnace core 2 located at joints on both sides of the stave cooler 1 and the remaining flow stave cooler 12 adjacent to the stave cooler 1. Drilling is performed by setting the core drill motor on the iron skin and moving the drill forward. In addition, since the upper and lower openings 4 of the stave cooler 1 are in the vicinity of the remaining stave cooler 12, the joint cutting hole 22 can be easily jointed by the water jet 13a without providing a perforation. There is no need to provide a hole.
目地切り用孔22には発破を掛けることなく、目地切り用孔22を通してウォータジェットの高圧水の噴射により目地切りすることができる。   The joint cutting hole 22 can be jointed by spraying water jet high-pressure water through the joint cutting hole 22 without blasting.
1:ステーブクーラ 2:高炉鉄皮
3:給排水取出管 4:開口
5:シールプレート 6:保護管
7:固定ボルト 8:短管
9:不定形耐火物 10:切り口
11:発破用薬剤充填孔 12:残存流用ステーブクーラ
13:ウォータジェットノズル 14:作業用孔
15:ジャッキ 16:ピストン棒
17:開口 18:吊りチェーン
19:ガイドワイヤ 20:引き寄せ棒
21:更新用ステーブクーラ 22:目地切り用孔
31:損傷ステーブクーラ 32:更新用ステーブクーラ
33:残存不定形耐火物 34:鉄皮
35:残存ステーブクーラ 36:ダイナマイト発破
1: Stave cooler 2: Blast furnace core 3: Supply / drainage pipe 4: Opening 5: Seal plate 6: Protective pipe 7: Fixing bolt 8: Short pipe 9: Indeterminate refractory 10: Cut 11: Blasting chemical filling hole 12 : Remaining flow cooler 13: Water jet nozzle 14: Work hole 15: Jack 16: Piston rod 17: Opening 18: Suspension chain 19: Guide wire 20: Pulling rod 21: Renewal stave cooler 22: Joint cutting hole 31 : Damaged stave cooler 32: Renewal stave cooler 33: Residual irregular refractory 34: Iron skin 35: Residual stave cooler 36: Dynamite blasting

Claims (4)

  1. 高炉の炉壁から損傷したステーブクーラを撤去し、撤去した場所へ更新用のステーブクーラを据え付けるステーブクーラの交換方法において、
    ステーブクーラと高炉鉄皮に結合されて高炉鉄皮の開口から炉外側へ突出している結合部材を除去し、
    結合部材の除去により現れた高炉鉄皮の開口を通してステーブクーラと高炉鉄皮との間に充填されている不定形耐火物へ複数の発破用薬剤充填孔を穿孔し、
    発破用薬剤充填孔へ隣接する既存流用ステーブクーラに影響を与えない量の発破用薬剤を充填して発破をかけて不定形耐火物に亀裂を発生させ、
    亀裂が発生した不定形耐火物を高炉鉄皮の開口からウォータジェットにより破砕し、
    ステーブクーラを炉壁から炉内側に押して取り外した後、高炉外へ撤去し、
    ステーブクーラと高炉鉄皮間に残存していた不定形耐火物を前記高炉鉄皮の開口部を利用して炉内へ払い落とした後に、
    ステーブクーラを撤去した場所へ更新用ステーブクーラを炉内側から据え付けることを特徴とするステーブクーラの交換方法。
    In the method for replacing the stave cooler, remove the damaged stave cooler from the furnace wall of the blast furnace, and install the renewal stave cooler at the removed location.
    Remove the coupling member that is connected to the stave cooler and the blast furnace core and protrudes from the opening of the blast furnace core to the outside of the furnace,
    Drilling a plurality of blasting chemical filling holes into an amorphous refractory filled between the stave cooler and the blast furnace core through the opening of the blast furnace core that appears by removing the coupling member,
    Fill the blasting agent filling hole adjacent to the diverted stave cooler with an amount that does not affect the blasting agent and blast it to generate cracks in the amorphous refractory,
    The unshaped refractory with cracks is crushed by a water jet from the opening of the blast furnace iron skin,
    After removing the stave cooler from the furnace wall to the inside of the furnace, remove it outside the blast furnace,
    After the amorphous refractory material remaining between the stave cooler and the blast furnace iron skin is removed into the furnace using the opening of the blast furnace iron skin,
    A method for replacing a stave cooler, wherein the renewal stave cooler is installed from the inside of the furnace to the place where the stave cooler is removed.
  2. 撤去するステーブクーラと隣接する既存流用ステーブクーラの境界にある高炉鉄皮に目地切り用の開口を設け、目地切り用の開口からウォータジェットにより目地及び目地と高炉鉄皮間の不定形耐火物を破砕して分離することを特徴とする請求項1記載のステーブクーラの交換方法。   An opening for joint cutting is provided in the blast furnace iron skin at the boundary between the stave cooler to be removed and the existing diverted stave cooler, and an unshaped refractory between the joint and the joint and the blast furnace iron core is formed by a water jet from the joint opening. 2. The method of replacing a stave cooler according to claim 1, wherein the stave cooler is separated by crushing.
  3. 撤去するステーブクーラの背面と高炉鉄皮との間の不定形耐火物を排出し、不定形耐火物を充填する隙間を設けることを特徴とする請求項1又は2記載のステーブクーラの交換方法。   3. The method for replacing a stave cooler according to claim 1, wherein a gap for discharging the irregular refractory between the rear surface of the stave cooler to be removed and the blast furnace iron shell is provided and the irregular refractory is filled.
  4. 高炉鉄皮に固定した複数のジャッキ受けに配置したジャッキにより炉外からステーブクーラを炉内側に押して撤去することを特徴とする請求項1、2又は3記載のステーブクーラの撤去方法。   The method of removing a stave cooler according to claim 1, 2 or 3, wherein the stave cooler is pushed out of the furnace into the furnace by jacks arranged on a plurality of jack receptacles fixed to the blast furnace iron shell.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102443666A (en) * 2011-12-09 2012-05-09 攀钢集团工程技术有限公司 Device for rapid replacement of blast furnace cooling wall through external jacking without lowering stockline and construction method thereof

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Publication number Priority date Publication date Assignee Title
JPH0432123B2 (en) * 1988-10-14 1992-05-28
JP4105983B2 (en) * 2003-06-16 2008-06-25 株式会社神戸製鋼所 How to repair blast furnace iron skin

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JPH0432123B2 (en) * 1988-10-14 1992-05-28
JP4105983B2 (en) * 2003-06-16 2008-06-25 株式会社神戸製鋼所 How to repair blast furnace iron skin

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JPN4007010428; 中村 博史: '操業途中におけるステーブ取替技術について' 日本鉄鋼協会共同研究会 第45回銑鋼設備分科会資料 銑鋼設45-共II-4, 19921114, 日本鉄鋼協会共同研究会 第45回銑鋼設備分科会 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102443666A (en) * 2011-12-09 2012-05-09 攀钢集团工程技术有限公司 Device for rapid replacement of blast furnace cooling wall through external jacking without lowering stockline and construction method thereof

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