JP3686642B2 - Cast copper stave cooler structure - Google Patents

Cast copper stave cooler structure Download PDF

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Publication number
JP3686642B2
JP3686642B2 JP2002259759A JP2002259759A JP3686642B2 JP 3686642 B2 JP3686642 B2 JP 3686642B2 JP 2002259759 A JP2002259759 A JP 2002259759A JP 2002259759 A JP2002259759 A JP 2002259759A JP 3686642 B2 JP3686642 B2 JP 3686642B2
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JP
Japan
Prior art keywords
cast
stave cooler
cast copper
furnace
copper
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
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JP2002259759A
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Japanese (ja)
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JP2004099925A (en
Inventor
啓友 森光
足水 村田
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.)
Nippon Steel Corp
Nippon Steel Plant Designing Corp
Original Assignee
Nittetsu Plant Designing Corp
Nippon Steel Corp
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Priority to JP2002259759A priority Critical patent/JP3686642B2/en
Publication of JP2004099925A publication Critical patent/JP2004099925A/en
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Description

【0001】
【産業上の利用分野】
本発明は、冶金用の高炉の炉壁を冷却する鋳物銅ステーブクーラーの構造に関する。
【0002】
【従来の技術】
従来の高炉の炉壁冷却方法は、冷却盤による冷却方法とステーブクーラーによる冷却方法とに大別される。
冷却盤による冷却は、高炉稼働後の煉瓦の損耗により炉内のプロフィルが悪化し高炉操業に悪影響を及ぼすため、ステーブクーラーによる冷却方法が一般的に採用されている。
このステーブクーラーによる冷却方法は、その材質によって、鋳鉄、鋳鋼、鋼板等の鉄系材ステーブクーラーと銅または銅合金材ステーブクーラーとに分類できる。
【0003】
鋳鉄に鋳込まれる管によって冷却通路を形成するステーブクーラーは公知であり、このステーブクーラーは鋳鉄の低い熱伝達率のため、また、酸化物層または空気断熱層によって生じる冷却管と鋳鉄との間の熱伝達抵抗のため、奪熱能が低く押さえられている。
稼働後に、高炉煉瓦積みが損耗した場合、ステーブクーラーの炉内面は、直接炉内高温ガスにさらされるため、鋳鉄製のステーブクーラーでは、熱伝達抵抗が大きいために、炉内面の冷却が不十分であり、炉内面の摩耗の促進は避けられず、それにより寿命が制限されている。
【0004】
そこで、最近では、鋳銅から成る鋳物銅ステーブクーラーが採用されており、冷却通路は鋳込まれる管によって形成されるか、または中子による鋳抜きによって形成される。
鋳物銅ステーブクーラーに関しては、例えば、実用新案登録第3045086号公報に開示されているように、鋳物銅に鋳込まれる管により冷却通路を形成されるステーブクーラーが提案されている。
しかし、従来の鋳物銅ステーブクーラーにおいては、鋳物銅の外部の冷却水路は、鋼管やステンレス管を溶接して形成されており、その溶接強度および信頼性が問題となっていた。
【0005】
図1は、従来の鋳物銅ステーブクーラーにおける冷却水路の構造を示す図である。
図1において、鋳物銅1の内部の冷却水路2は、中子を鋳物銅と共に鋳込むことにより形成され、この冷却水路の端部に給配水管3を溶接することにより取り付けていた。
しかし、溶接部4の経年劣化により、溶接強度が低下し、この部分が破断して冷却水が漏洩するという問題点があった。
また、取付ボルト部については、鋳造後機械加工により形成する必要があった。
さらに、ステーブクーラーの取付構造としては、給配水管部、固定金物等により鉄皮と接合しステーブクーラーを取り付けており、ステーブクーラーが炉内側に凸になる変形を十分に抑制できないために、取付部に伸縮管を用いない場合では、鋳物銅の外部の冷却水路の溶接部での破損が発生していた。
【0006】
【特許文献1】
実用新案登録第3045086号公報(第1頁、図2)
【0007】
【発明が解決しようとする課題】
本発明は、前述のような従来技術の問題点を解決し、銅鋳物と外部の冷却水路との接合強度および信頼性が高く、また、ステーブクーラーが炉内側に凸になる変形を十分に抑制できる鋳物銅ステーブクーラーの構造を提供することを課題とする。
【0008】
【課題を解決するための手段】
本発明は、前述の課題を解決するために鋭意検討の結果なされたものであり、その要旨とするところは特許請求の範囲に記載した通りの下記内容である。
(1)高炉の炉壁を冷却する鋳物銅ステーブクーラーの構造において、鋳物銅の内部に設けられた冷却水路の端部に、抜け落ち防止用のストッパーを外周に有する鋼管を鋳込むことにより、前記鋳物銅の外部の冷却水路を形成することを特徴とする鋳物銅ステーブクーラーの構造。
(2)前記鋼管の外周に該鋼管を保護する保護管を鋳込むことを特徴とする(1)に記載の鋳物銅ステーブクーラーの構造。
【0009】
(3)高炉の炉壁を冷却する鋳物銅ステーブクーラーの構造において、ステーブクーラーの背面の鋳物銅に、該鋳物銅の炉外側に向かって末広がりの形状を有する突起を鋳込むことにより、該突起にキャスタブルを保持することを特徴とする鋳物銅ステーブクーラーの構造。
(4)(1)または(2)に記載の鋼管および/または保護管を有する鋳物銅ステーブクーラーにおいて、(3)に記載の鋳物銅炉外側に向かって末広がりの形状を有する突起を設けることを特徴とする鋳物銅ステーブクーラーの構造。
【0010】
【発明の実施の形態】
本発明の実施の形態を図2乃至図4を用いて詳細に説明する。
<第1の実施形態>
図2は、本発明の鋳物銅ステーブクーラーの構造における第1の実施形態を例示する図である。
図2において、高炉の炉壁を冷却する鋳物銅ステーブクーラーにおける鋳物銅1の内部には、中子を鋳込むことによって冷却水路2が形成されている。
この冷却水路2の立ち上がり部の端部には、抜け落ち防止用のストッパー10を外周に有する鋳込み鋼管5を鋳込むことにより、前記鋳物銅の外部の冷却水路を形成している。
鋳込み鋼管5の外周にはストッパー10が設けられたまま、鋳物銅1に鋳込まれるので、鋳込み鋼管5に外部から引っ張る力が働いても鋳込み鋼管5が抜け落ちる心配がなく、従来のように溶接部の劣化により破断することもない。
【0011】
<第2の実施形態>
図3は、本発明の鋳物銅ステーブクーラーの構造における第2の実施形態を例示する図である。
図3において、鋳込み鋼管5の外周には、強度を向上させるための保護管6が設けられており、この保護管6の外周に、抜け落ち防止用のストッパー10が設けられている。
保護管6の外周にはストッパー10が設けられたまま、鋳物銅1に鋳込まれるので、鋳込み鋼管5に外部から引っ張る力が働いても保護管6が抜け落ちる心配がなく、従来のように溶接部の劣化により破断することもない。
【0012】
<第3の実施形態>
図4は、本発明の鋳物銅ステーブクーラーの構造における第3の実施形態を例示する図である。
図4において、ステーブクーラーの背面の鋳物銅1には、炉外側に向かって末広がりの形状を有する突起9を鋳込まれており、この突起9に不定形耐火物であるキャスタブルを保持させることにより、鋳物銅ステーブクーラーの炉内側への変形を抑制でき、それによって冷却配管部の発生応力低減に効果を発揮する。
また、鉄皮8に新たな開口を設ける必要がないので、鉄皮8の板厚を厚くすることなく、鋳物銅ステーブクーラーの炉内側への変形を抑制できる。
なお、本発明の第3の実施形態は、単独でも効果を奏するが、前述の第1および第2の実施形態と組み合わせて実施することによりさらに効果的である。
なお、本発明では、鋳物銅ステーブクーラーを使用したが、鋳鉄製ステーブクーラーと本発明の第3の実施形態とを組み合わせることも可能である。
【0013】
【発明の効果】
以上説明したように、本発明は鋳物銅ステーブクーラーにおいて、冷却水路の端部に鋼管および好ましくは保護管を鋳込み、鋳物銅の外部の冷却水路を形成することにより、以下の優れた効果を発揮する。
1)鋳物銅外部の冷却配管取付部の強度を向上でき、従来発生していた破損を回避できる。
2)冷却配管の溶接が不要になることで、製造コストおよび製造期間を低減できる。
また、ステーブクーラー背面に炉外側に向かって末広がりとなる突起形状を設けた鋳物銅ステーブクーラーの取付構造により、以下の優れた効果を発揮する。
【0014】
1)ステーブクーラーの背面に施工されるキャスタブルに突起部を埋め込み、炉内側への変形を抑制でき、それによって冷却配管部の発生応力低減に効果を発揮する。
2)鉄皮に開口を設ける必要がないので、鉄皮板厚を厚くすることなく、炉内側への変形を抑制できる。
3)ガスシールの必要がないので、工事期間を延長することなく、炉内側への変形を抑制できる。
4)冷却板高炉の鉄皮を流用する場合でも、鉄皮に新たな開孔をあける必要が無いので、鉄皮強度を低減することはない。
5)鋳物銅ステーブクーラーの変形を防止できるので、ステーブクーラー背面へのダストの進入等がなく、ステーブクーラーの炉内側への迫出し防止に効果を発揮し、更に長寿命が期待できる。
【図面の簡単な説明】
【図1】従来の鋳物銅ステーブクーラーにおける冷却水路の構造を示す図である。
【図2】本発明の鋳物銅ステーブクーラーの構造における第1の実施形態を例示する図である。
【図3】本発明の鋳物銅ステーブクーラーの構造における第2の実施形態を例示する図である。
【図4】本発明の鋳物銅ステーブクーラーの構造における第3の実施形態を例示する図である。
【符号の説明】
1:鋳物銅、
2:冷却水路、
3:給配水管、
4:溶接部、
5:鋳込み鋼管、
6:保護管、
7:キャスタブル、
8:鉄皮、
9:突起、
10:ストッパー、
[0001]
[Industrial application fields]
The present invention relates to a structure of a cast copper stave cooler for cooling a furnace wall of a metallurgical blast furnace.
[0002]
[Prior art]
Conventional blast furnace wall cooling methods are roughly classified into a cooling method using a cooling plate and a cooling method using a stave cooler.
Cooling by a cooling plate generally employs a cooling method by a stave cooler since the profile in the furnace deteriorates due to the wear of bricks after operation of the blast furnace and the blast furnace operation is adversely affected.
The cooling method by this stave cooler can be classified into iron-based material stave coolers such as cast iron, cast steel, and steel plate and copper or copper alloy material stave coolers according to the material.
[0003]
Stave coolers are known in which cooling passages are formed by pipes cast into cast iron, which stave coolers are due to the low heat transfer coefficient of cast iron and between the cooling pipe and cast iron produced by the oxide or air insulation layer. Because of the heat transfer resistance, the heat removal ability is kept low.
When the blast furnace brickwork is worn out after operation, the furnace inner surface of the stave cooler is directly exposed to the high temperature gas in the furnace. The promotion of wear on the inner surface of the furnace is inevitable, thereby limiting the life.
[0004]
Therefore, recently, a cast copper stave cooler made of cast copper has been adopted, and the cooling passage is formed by a pipe to be cast or formed by casting with a core.
As for the cast copper stave cooler, for example, as disclosed in Japanese Utility Model Registration No. 3045086, a stave cooler in which a cooling passage is formed by a pipe cast into cast copper has been proposed.
However, in the conventional cast copper stave cooler, the cooling water channel outside the cast copper is formed by welding a steel pipe or a stainless steel pipe, and its welding strength and reliability have been problems.
[0005]
FIG. 1 is a view showing a structure of a cooling water channel in a conventional cast copper stave cooler.
In FIG. 1, the cooling water channel 2 inside the cast copper 1 is formed by casting the core together with the cast copper, and is attached by welding the water supply / distribution pipe 3 to the end of the cooling water channel.
However, there is a problem in that the weld strength decreases due to the aging of the welded portion 4, and this portion breaks and the cooling water leaks.
Further, the mounting bolt portion has to be formed by machining after casting.
In addition, the stave cooler mounting structure is attached to the iron skin with a water supply / distribution pipe, fixed metal fittings, etc., and the stave cooler is mounted. In the case where the expansion tube is not used for the portion, the welded portion of the cooling water channel outside the cast copper has been damaged.
[0006]
[Patent Document 1]
Utility Model Registration No. 3045086 (first page, FIG. 2)
[0007]
[Problems to be solved by the invention]
The present invention solves the problems of the prior art as described above, has high bonding strength and reliability between the copper casting and the external cooling water channel, and sufficiently suppresses deformation in which the stave cooler protrudes inside the furnace. An object is to provide a structure of a cast copper stave cooler that can be cast.
[0008]
[Means for Solving the Problems]
The present invention has been made as a result of intensive studies in order to solve the above-described problems, and the gist of the present invention is the following contents as described in the claims.
(1) In the structure of the cast copper stave cooler for cooling the furnace wall of the blast furnace, by casting a steel pipe having a stopper for preventing falling off at the end of the cooling water channel provided inside the cast copper, A structure of a cast copper stave cooler characterized in that a cooling water channel outside the cast copper is formed.
(2) The structure of the cast copper stave cooler according to (1), wherein a protective tube that protects the steel tube is cast on the outer periphery of the steel tube.
[0009]
(3) In the structure of a cast copper stave cooler that cools the furnace wall of the blast furnace, the protrusion is formed by casting a protrusion having a divergent shape toward the outside of the cast copper into the cast copper on the back surface of the stave cooler. The structure of a cast copper stave cooler characterized in that it holds a castable.
(4) In the cast copper stave cooler having the steel pipe and / or the protective pipe as described in (1) or (2), providing a protrusion having a divergent shape toward the outside of the cast copper furnace as described in (3). The structure of the characteristic cast copper stave cooler.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described in detail with reference to FIGS.
<First Embodiment>
FIG. 2 is a diagram illustrating the first embodiment in the structure of the cast copper stave cooler of the present invention.
In FIG. 2, a cooling water channel 2 is formed by casting a core inside a cast copper 1 in a cast copper stave cooler for cooling the furnace wall of the blast furnace.
A cooling water channel outside the cast copper is formed at the end of the rising portion of the cooling water channel 2 by casting a cast steel pipe 5 having a stopper 10 for preventing falling off on the outer periphery.
Since the outer periphery of the cast steel pipe 5 is cast into the cast copper 1 with the stopper 10 provided, there is no fear that the cast steel pipe 5 will come off even if a force pulled from the outside acts on the cast steel pipe 5, and welding is performed as in the past. There is no breakage due to deterioration of the part.
[0011]
<Second Embodiment>
FIG. 3 is a diagram illustrating a second embodiment in the structure of the cast copper stave cooler of the present invention.
In FIG. 3, a protective tube 6 for improving the strength is provided on the outer periphery of the cast steel pipe 5, and a stopper 10 for preventing falling off is provided on the outer periphery of the protective tube 6.
Since the outer periphery of the protective tube 6 is cast into the cast copper 1 with the stopper 10 provided, there is no fear that the protective tube 6 will fall out even if a force pulled from the outside acts on the cast steel tube 5, and welding is performed as in the past. There is no breakage due to deterioration of the part.
[0012]
<Third Embodiment>
FIG. 4 is a diagram illustrating a third embodiment in the structure of the cast copper stave cooler of the present invention.
In FIG. 4, the casting copper 1 on the back of the stave cooler is cast with a protrusion 9 having a shape that spreads toward the outside of the furnace, and by holding the castable that is an irregular refractory to the protrusion 9 The deformation of the cast copper stave cooler to the inside of the furnace can be suppressed, thereby exerting the effect of reducing the generated stress in the cooling pipe portion.
Moreover, since it is not necessary to provide a new opening in the iron skin 8, it is possible to suppress deformation of the cast copper stave cooler to the furnace inner side without increasing the thickness of the iron skin 8.
The third embodiment of the present invention is effective even when used alone, but is more effective when implemented in combination with the first and second embodiments described above.
In the present invention, a cast copper stave cooler is used. However, a cast iron stave cooler and the third embodiment of the present invention can be combined.
[0013]
【The invention's effect】
As described above, in the cast copper stave cooler, the present invention exhibits the following excellent effects by casting a steel pipe and preferably a protective pipe at the end of the cooling water channel to form a cooling water channel outside the cast copper. To do.
1) The strength of the cooling pipe mounting portion outside the cast copper can be improved, and damage that has occurred conventionally can be avoided.
2) By eliminating the need for welding of the cooling pipe, the manufacturing cost and the manufacturing period can be reduced.
In addition, the cast copper stave cooler mounting structure provided on the back of the stave cooler with a protruding shape that expands toward the outside of the furnace exhibits the following excellent effects.
[0014]
1) A protrusion is embedded in a castable that is constructed on the back of the stave cooler, and deformation to the inside of the furnace can be suppressed, thereby effectively reducing the generated stress in the cooling pipe.
2) Since there is no need to provide an opening in the iron skin, deformation into the furnace can be suppressed without increasing the thickness of the iron skin plate.
3) Since there is no need for gas sealing, deformation to the inside of the furnace can be suppressed without extending the construction period.
4) Even when the iron plate of the cold plate blast furnace is diverted, it is not necessary to make a new hole in the iron plate, so the strength of the iron plate is not reduced.
5) Since the deformation of the cast copper stave cooler can be prevented, dust does not enter the back of the stave cooler, etc., and is effective in preventing the stave cooler from being pushed into the furnace.
[Brief description of the drawings]
FIG. 1 is a view showing the structure of a cooling water channel in a conventional cast copper stave cooler.
FIG. 2 is a diagram illustrating a first embodiment in the structure of a cast copper stave cooler of the present invention.
FIG. 3 is a diagram illustrating a second embodiment in the structure of the cast copper stave cooler of the present invention.
FIG. 4 is a diagram illustrating a third embodiment in the structure of the cast copper stave cooler of the present invention.
[Explanation of symbols]
1: Cast copper,
2: Cooling channel,
3: Water distribution pipe,
4: Welded part,
5: Cast steel pipe,
6: Protection tube,
7: Castable,
8: Iron skin,
9: protrusion,
10: Stopper,

Claims (4)

高炉の炉壁を冷却する鋳物銅ステーブクーラーの構造において、鋳物銅の内部に設けられた冷却水路の端部に、抜け落ち防止用のストッパーを外周に有する鋼管を鋳込むことにより、前記鋳物銅の外部の冷却水路を形成することを特徴とする鋳物銅ステーブクーラーの構造。In the structure of a cast copper stave cooler that cools the furnace wall of the blast furnace, a steel pipe having a stopper for preventing falling off is cast into an end of a cooling water channel provided inside the cast copper, thereby A structure of a cast copper stave cooler characterized by forming an external cooling water channel. 前記鋼管の外周に該鋼管を保護する保護管を鋳込むことを特徴とする請求項1に記載の鋳物銅ステーブクーラーの構造。The structure of the cast copper stave cooler according to claim 1, wherein a protective pipe for protecting the steel pipe is cast on an outer periphery of the steel pipe. 高炉の炉壁を冷却する鋳物銅ステーブクーラーの構造において、ステーブクーラーの背面の鋳物銅に、該鋳物銅の炉外側に向かって末広がりの形状を有する突起を鋳込むことにより、該突起にキャスタブルを保持することを特徴とする鋳物銅ステーブクーラーの構造。In the structure of a cast copper stave cooler that cools the furnace wall of the blast furnace, castable protrusions are cast into the cast copper on the back surface of the stave cooler and have a shape that widens toward the outside of the cast copper. The structure of the cast copper stave cooler characterized by holding. 請求項1または請求項2に記載の鋼管および/または保護管を有する鋳物銅ステーブクーラーにおいて、請求項3に記載の鋳物銅炉外側に向かって末広がりの形状を有する突起を設けることを特徴とする鋳物銅ステーブクーラーの構造。A cast copper stave cooler having the steel pipe and / or the protective pipe according to claim 1 or 2, wherein a protrusion having a shape that widens toward the outside of the cast copper furnace according to claim 3 is provided. Cast copper stave cooler structure.
JP2002259759A 2002-09-05 2002-09-05 Cast copper stave cooler structure Expired - Fee Related JP3686642B2 (en)

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Publication number Priority date Publication date Assignee Title
CN107622154A (en) * 2017-09-06 2018-01-23 武汉钢铁有限公司 The determination method of blast furnace heat load region cooling wall heat flow rate per unit area and thickness of the slag crust

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CN100465290C (en) * 2007-01-12 2009-03-04 汕头华兴冶金备件厂有限公司 Laminated cooling walls
CN109282647A (en) * 2018-10-17 2019-01-29 中国恩菲工程技术有限公司 Charging hole device for metallurgical furnace and the metallurgical furnace with it
CN114622046A (en) * 2022-02-10 2022-06-14 李宇 Blast furnace cast copper cooling wall

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107622154A (en) * 2017-09-06 2018-01-23 武汉钢铁有限公司 The determination method of blast furnace heat load region cooling wall heat flow rate per unit area and thickness of the slag crust

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