JP2000073110A - Stave cooler for blast furnace - Google Patents
Stave cooler for blast furnaceInfo
- Publication number
- JP2000073110A JP2000073110A JP10256107A JP25610798A JP2000073110A JP 2000073110 A JP2000073110 A JP 2000073110A JP 10256107 A JP10256107 A JP 10256107A JP 25610798 A JP25610798 A JP 25610798A JP 2000073110 A JP2000073110 A JP 2000073110A
- Authority
- JP
- Japan
- Prior art keywords
- blast furnace
- stave
- furnace
- main body
- shell
- 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.)
- Withdrawn
Links
Landscapes
- Blast Furnaces (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、高炉等の炉内から
の熱負荷を受ける炉体鉄皮を保護するのに適したステー
ブクーラーに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stove cooler suitable for protecting a furnace shell which receives a thermal load from a furnace such as a blast furnace.
【０００２】[0002]
【従来技術】高炉鉄皮を保護する冷却用ステーブクーラ
ー（以下、単にステーブと呼ぶ）は、採用の当初からス
テーブ本体の内面（高炉炉内側）に成形煉瓦等の耐火物
を内張り築造し、高炉炉内からの熱負荷から高炉炉体鉄
皮を保護していたが、採用初期から二十数年を経、その
間ステーブ自体は多くの変遷を辿り、現在では耐火物に
よる炉体鉄皮の保護に対する考え方が変わりつつある。2. Description of the Related Art A cooling stave cooler (hereinafter, simply referred to as a stave) for protecting a blast furnace steel shell is made by lining up a refractory such as a molded brick on the inner surface of a stave body (inside a blast furnace) from the beginning of use. Although the blast furnace shell was protected from the heat load from the furnace, the stave itself has undergone many changes over the past two decades from the initial adoption, and now the furnace shell is protected by refractories. The way of thinking about is changing.
【０００３】従来の考え方によるステーブ内面へ耐火物
を内張りした公知例は数多く提案されており、例えば実
開昭４９−４３５０４号公報、実開昭５０−１３７３０
５号公報には煉瓦受け部を有するステーブの炉内側面に
耐火煉瓦を築造して炉内からの熱負荷から炉体鉄皮を保
護している。すなわち、炉内側面に耐火物を上下数段に
埋設すると共に、鉄皮側内部に冷媒通路を形成する鋼管
を埋設した鋳鉄製のステーブ本体を高炉鉄皮の内側に同
芯状の壁を形成する如く配設し、さらに該ステーブ本体
の内側に炉壁煉瓦を積み、上記鋼管に炉体外側より冷媒
を送り込み、炉内からの熱負荷をステーブ本体を介して
鋼管内の冷媒にて吸収し、鉄皮を熱負荷より保護するよ
うにしたものがある。そして炉壁煉瓦は、煉瓦積構造強
度を持たせ長寿命化を図るためにステーブから棚状に突
出させた煉瓦支持棚に約４５０〜６００ｍｍの壁厚で積
まれている。[0003] A number of known examples in which a refractory is lined on the inner surface of a stave based on the conventional concept have been proposed, for example, Japanese Utility Model Laid-Open No. 49-43504 and Japanese Utility Model Laid-Open No. 50-13730.
In Japanese Patent Publication No. 5 (1993), a refractory brick is built on the inner side of the furnace of a stave having a brick receiving portion to protect the furnace shell from a heat load from inside the furnace. In other words, a refractory is buried in several layers up and down on the furnace inner surface, and a cast iron stave body in which a steel pipe forming a refrigerant passage is buried inside the steel shell forms a concentric wall inside the blast furnace steel. The furnace wall bricks are stacked inside the stave body, and a coolant is sent from the outside of the furnace body to the steel pipe, and a heat load from the furnace is absorbed by the coolant in the steel pipe through the stave body. In some cases, the steel skin is protected from heat load. Furnace wall bricks are stacked with a wall thickness of about 450 to 600 mm on a brick supporting shelf protruding in a shelf shape from a stave in order to provide a brick structure strength and extend the life.
【０００４】しかし、この煉瓦支持棚は通常１．８〜
２．５ｍピッチにしか設置できず、また、単に煉瓦は積
層されているだけであるため、煉瓦の支持強度は充分で
なく、寿命は３年程度しかなく短いという欠点があっ
た。また炉壁煉瓦の損傷は、高温下での熱的スポーリン
グや、原料降下による摩耗、炉内循環アルカリ物による
化学的変質等により進み、煉瓦が破壊されていくと部分
的に煉瓦積構造の強度を失い局部的に、または広範囲に
かつ、一時に或いは徐々に煉瓦が脱落することがあり、
著しいプロフィルの変化を生じることになる。[0004] However, this brick support shelf is usually 1.8 to
Since it can be installed only at a pitch of 2.5 m, and the bricks are merely laminated, the supporting strength of the bricks is not sufficient, and the service life is only about three years, which is a shortcoming. In addition, damage to the furnace wall brick progresses due to thermal spalling at high temperatures, wear due to falling of raw materials, chemical alteration due to circulating alkali in the furnace, etc. Bricks may fall off locally or extensively, temporarily or gradually, losing strength,
This will result in significant profile changes.
【０００５】かかる炉壁煉瓦の損失による炉内プロフィ
ルの経時的変化および円周方向のバランスの悪化は、炉
壁周辺側へのガス抜け現象および内容物の降下速度の増
加等を生じ、熱負荷の上昇、ガス利用率の低下、炉壁煉
瓦の損耗促進、装入物分布制御性の悪化等を生じ炉況を
不安定にする惧れがあった。The temporal change of the profile in the furnace and the deterioration of the balance in the circumferential direction due to the loss of the furnace wall brick cause a gas release phenomenon to the peripheral side of the furnace wall and an increase in the falling speed of the contents, thereby causing a heat load. There is a fear that the furnace condition may become unstable due to an increase in the gas utilization rate, a decrease in the gas utilization rate, accelerated wear of the furnace wall bricks, and a deterioration in the controllability of the charge distribution.
【０００６】このような問題点の解決を図るために本出
願人は特開昭６１−３７９０４号等で開示したように、
炉内内張り耐火物とステーブ本体を一体として構成する
ために、ステーブを鋳造するに際し、耐火物を鋳ぐるん
だステーブを開発した。このステーブを図６に示すと、
ステーブ本体１の炉内側面に一定間隔をおいて、上下方
向に複数個の凹部２を形成し、該凹部２に炉壁煉瓦４を
一体的に鋳込む如くし、また該凹部２に隣接する凸部３
の上・下端から炉壁煉瓦４の炉内側面以下の長さで煉瓦
支持金物５をステーブ本体１に設け、炉壁煉瓦４を保持
する如くなし、一方従来のステーブと同様に冷媒流通路
形成用の鋼管７を配設し、これらを共にステーブ本体の
鋳造時に一体的に鋳ぐるみ構成したものである。[0006] In order to solve such a problem, the present applicant disclosed in Japanese Patent Application Laid-Open No. 61-37904, etc.
In order to construct the stove body integrally with the refractory lining inside the furnace, we developed a stave that was made of cast refractory when casting the stave. This stave is shown in FIG.
A plurality of recesses 2 are formed in the vertical direction at regular intervals on the furnace inner surface of the stave body 1 so that the furnace wall bricks 4 are integrally cast into the recesses 2 and are adjacent to the recesses 2. Convex part 3
The brick support metal 5 is provided on the stave body 1 from the upper and lower ends of the furnace wall to a length of less than the inner side surface of the furnace wall 4 so as to hold the furnace wall brick 4, while forming a refrigerant flow passage in the same manner as a conventional stave. Steel pipes 7 are provided, and these are integrally formed integrally when the stave body is cast.
【０００７】[0007]
【発明が解決しようとする課題】本発明者らは前記した
ステーブを高炉炉体に適用してみたところ、従来のステ
ーブ内面に炉壁煉瓦を内張りしたステーブより、その耐
用年数は増大したが、ステーブ本体と一体的に鋳ぐるん
だ炉壁煉瓦であっても、その損耗度合いはステーブに設
けられた煉瓦支持金物に比して早いことが判明した。こ
れは高炉規模、操業状況、稼動期間、煉瓦の厚みにもよ
るが通常の高炉において１〜２年程度で殆どの炉壁煉瓦
が損耗（一部脱落）し、ステーブは高炉炉内側において
煉瓦支持金物だけが残存し、垂直断面形状において櫛形
の様相を呈した状態となる。The present inventors applied the above-mentioned stave to a blast furnace furnace body, and found that the service life of the stave was longer than that of a conventional stave in which a furnace wall brick was lined on the inner surface of the stave. It has been found that even the furnace wall brick that is integrally cast with the stave body has a faster degree of wear than the brick supporting hardware provided on the stave. This depends on the scale of the blast furnace, the operating conditions, the operating period, and the thickness of the brick, but most of the furnace wall bricks are worn out (partially dropped) in about 1 to 2 years in a normal blast furnace, and the stave supports the brick inside the blast furnace. Only the metal remains, and a vertical cross-section has a comb-like appearance.
【０００８】図４に通常の操業を行っている高炉につい
て本発明者らが調査した高炉操業稼動期間とステーブの
損耗状況の関係を示した。図から明らかなように稼動初
期においては、ステーブの損耗度合いが激しく約５〜８
ｍｍ／月程度もあるが、その期間を過ぎると１〜３ｍｍ
／月程度に収まっている。これは高炉の稼動初期は炉壁
煉瓦の損耗が大きいことを物語っており、ステーブ本体
（鋳物）に達するとその損耗（溶損）度合いの進行が少
なくなるということである。FIG. 4 shows the relationship between the operation period of the blast furnace operation and the state of wear of the staves investigated by the inventors of the present invention for the blast furnace in normal operation. As is clear from the figure, in the initial stage of operation, the degree of wear of the stave is severe and about 5 to 8
mm / month, but after that period 1-3mm
/ Month. This indicates that the furnace wall bricks are heavily worn in the early stage of the operation of the blast furnace, and that the degree of wear (melting) of the stave body (casting) decreases when the furnace wall brick is reached.
【０００９】理想的には煉瓦支持金物と炉壁煉瓦の溶損
（損耗）が同一早さで進行するのが、炉内プロフィル確
保の面から好ましいが、現状の高炉操業においてはその
ようには進行しないのが実状である。このため、内面に
炉壁煉瓦を持たないステーブは、ステーブ本体の溶損が
進行し、遂には冷媒供給用の配管にまで達し、冷媒が炉
内へ漏洩すると言う不都合が起こり、一時凌ぎに冷媒供
給管への冷媒供給を遮断する等の対策を行うか、または
ステーブ本体を改修せざるを得ない状態となる。この状
態が局部的ではなく高炉炉体全面に及んだ場合は、高炉
炉体全体のステーブを取り換えなければならず、高炉本
体の寿命に大きな影響を及ぼす結果となる。そこで本発
明では上記問題点の解決を図ったステーブクーラーを提
供することを目的とする。Ideally, the erosion (wear) of the brick and the furnace wall brick proceed at the same speed from the viewpoint of securing the furnace profile. However, in the current blast furnace operation, this is not the case. The fact is that it does not progress. For this reason, a stave that does not have a furnace wall brick on the inner surface has the disadvantage that melting of the stave body progresses, eventually reaches the refrigerant supply pipe, and the refrigerant leaks into the furnace. It is necessary to take measures such as shutting off the supply of the refrigerant to the supply pipe, or to repair the stave body. If this condition is not localized but extends over the entire blast furnace body, the staves of the entire blast furnace body must be replaced, resulting in a significant effect on the life of the blast furnace body. Therefore, an object of the present invention is to provide a stave cooler that solves the above-mentioned problems.
【００１０】[0010]
【課題を解決するための手段】本発明の要旨とするとこ
ろは、下記手段にある。 （１） 高炉本体の炉体鉄皮内面に装着するステーブに
おいて、予め高炉鉄皮側に該当する部分の冷却体に冷媒
流通用配管を埋設し、高炉内面側には炉壁耐火物を設け
ず、内面をほぼ平坦に形成して前記冷媒流通用配管を一
体的に鋳ぐるんだ構造とした高炉用ステーブクーラー。 （２） 高炉本体の炉体鉄皮内面に装着するステーブに
おいて、予め高炉鉄皮側に該当する部分の冷却体に冷媒
流通用配管を埋設し、高炉内面側には複数個の凹部を設
け、該凹部に断熱材が配設される如くなし、かつ内面を
ほぼ平坦に形成し、高炉内面側には炉壁耐火物を設け
ず、前記冷媒流通用配管と断熱材を一体的に鋳ぐるんだ
構造とした高炉用ステーブクーラー。 （３） 前記高炉本体の炉体鉄皮内面に装着するステー
ブにおいて、該ステーブ厚みを炉壁耐火物を鋳ぐるんで
一体的構造としたステーブの厚みと、ほぼ同等の厚みに
した（１）または（２）記載の高炉用ステーブクーラ
ー。 （４） 前記高炉本体の炉体鉄皮内面に装着するステー
ブにおいて、高炉鉄皮側に該当する部分に配置する冷媒
流通用配管が、その配管同士の間隔を密に配設した
（１）ないし（３）のいずれかに記載の高炉用ステーブ
クーラー。 （５） 前記高炉本体の炉体鉄皮内面に装着するステー
ブにおいて、高炉鉄皮側に該当する部分に配置する冷媒
流通用配管が、その配管同士の間隔が１８０ｍｍ以下に
なるように配設した（４）記載の高炉用ステーブクーラ
ー。 （６） 前記高炉本体の炉体鉄皮内面に装着するステー
ブにおいて、高炉内面側に配設される断熱材の幅をリブ
の幅とほぼ同等かそれ以下とした（２）ないし（５）の
いずれかに記載の高炉用ステーブクーラー。 （７） 前記高炉本体の炉体鉄皮内面に装着するステー
ブにおいて、高炉内面側に配設される断熱材の厚み１２
０ｍｍ以下とした（２）ないし（６）のいずれかに記載
の高炉用ステーブクーラー。 （８） 前記高炉本体の炉体鉄皮内面に装着するステー
ブにおいて、高炉内面側のステーブ表面の全面に亘って
断熱層を設けた（１）ないし（７）のいずれかに記載の
高炉用ステーブクーラー。 （９） 前記（８）において、ステーブ表面に微小な凹
凸を設けた高炉用ステーブクーラー。The gist of the present invention lies in the following means. (1) In a stave to be mounted on the inner surface of the furnace shell of the blast furnace main body, a refrigerant circulation pipe is buried in advance in the cooling body corresponding to the blast furnace steel shell side, and no furnace wall refractory is provided on the inner surface of the blast furnace. And a stove cooler for a blast furnace having a structure in which the inner surface is formed substantially flat and the refrigerant distribution pipe is integrally cast. (2) In a stave to be mounted on the inner surface of the furnace shell of the blast furnace main body, a coolant circulation pipe is buried in advance in a portion of the cooling body corresponding to the blast furnace steel shell, and a plurality of recesses are provided on the inner surface of the blast furnace, A heat insulating material is provided in the concave portion, and the inner surface is formed substantially flat, and a furnace wall refractory is not provided on the inner surface side of the blast furnace, and the refrigerant distribution pipe and the heat insulating material are integrally cast. A stove cooler for blast furnaces with an oval structure. (3) In the stave to be mounted on the inner surface of the furnace shell of the blast furnace main body, the thickness of the stave is set to be substantially equal to the thickness of the stave formed by casting a furnace wall refractory and having an integrated structure. The stove cooler for blast furnace according to (2). (4) In the stave to be mounted on the inner surface of the furnace shell of the blast furnace main body, the refrigerant distribution pipes arranged in a portion corresponding to the blast furnace steel shell have a densely arranged interval between the pipes. The stave cooler for blast furnace according to any one of (3). (5) In the stave attached to the inner surface of the furnace shell of the blast furnace main body, the refrigerant circulation pipes arranged in a portion corresponding to the blast furnace steel shell are arranged such that the interval between the pipes is 180 mm or less. (4) The stove cooler for blast furnace according to (4). (6) In the stave to be mounted on the inner surface of the furnace shell of the blast furnace main body, the width of the heat insulating material disposed on the inner surface side of the blast furnace is substantially equal to or less than the width of the rib. The stove cooler for blast furnace according to any one of the above. (7) In a stave to be mounted on the inner surface of the furnace shell of the blast furnace main body, the thickness of the heat insulating material disposed on the inner surface side of the blast furnace is 12
The stave cooler for a blast furnace according to any one of (2) to (6), wherein the stove cooler is 0 mm or less. (8) The stave for the blast furnace according to any one of (1) to (7), wherein a heat insulating layer is provided over the entire surface of the stave surface on the inner surface side of the blast furnace in the stave attached to the inner surface of the furnace shell of the blast furnace body. cooler. (9) The stove cooler for a blast furnace according to the above (8), wherein minute irregularities are provided on the stave surface.
【００１１】[0011]
【発明の実施の形態】本発明者らは高炉炉内からの熱的
負荷に対する抵抗力の高いステーブを開発するために、
種々の実験検討を行い、新たなステーブを開発すること
に成功し、本発明を完成するに至った。本発明の根幹を
なす技術思想は、ステーブ内面（高炉炉内側、以下同
様）に炉壁煉瓦等の耐火物を持たず、ステーブ本体の鋳
物（通常ステーブは鋳物で構成される）のみによって炉
壁を構成して炉体鉄皮を保護するところにある。この場
合、炉内側の鋳物先端部の温度をできるだけ低下せしめ
ることによりステーブ本体の損耗度合いを小さくできる
ので、ステーブの冷却能の効率アップを考えなければな
らず、また、高炉炉内から熱負荷を如何にして防ぐかに
ついても考慮しなければならない。BEST MODE FOR CARRYING OUT THE INVENTION In order to develop a stave having a high resistance to thermal loads from inside a blast furnace,
After conducting various experimental studies, a new stave was successfully developed, and the present invention was completed. The technical idea that forms the basis of the present invention is that a furnace wall is not provided with a refractory such as a furnace wall brick on the inner surface of a stave (the inside of a blast furnace, the same applies hereinafter), and only a casting of a stave body (a stave is usually made of a casting). To protect the furnace shell. In this case, the degree of wear of the stave body can be reduced by lowering the temperature of the casting tip inside the furnace as much as possible.Therefore, it is necessary to consider increasing the efficiency of the cooling capacity of the stave, and also reduce the heat load from inside the blast furnace. You also need to consider how to prevent it.
【００１２】以下、図面に基づいて本発明を詳細に説明
する。図１は本発明によるステーブ本体の側面図を示し
たもので、ステーブ本体１の内面６には耐火物を有せ
ず、ほぼ平坦な鋳造したままの鋳肌をもった状態にあ
り、後面側（高炉鉄皮側、以下同様）には冷媒（主に冷
却用水）を流通するため流通路を構成する配管７（主に
鋼管）が埋設されている。ステーブ本体の製造に当たっ
ては特定されないが、通常鋳物の鋳造によって製造され
るので、ステーブを冷却するための冷却水流通路用の配
管７は鋳造時に予め所定位置にセットして置き、ステー
ブ本体１を鋳造するとき一体的に鋳込んで製造される。
ステーブ本体１の厚みは高炉全体のプロフィルとの兼合
から、従来の炉壁煉瓦を有していたときとほぼ同等の厚
さを有せしめる。しかし炉容積を増加する必要性がある
ときには厚さを薄くすることも可能である。Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view of a stave body according to the present invention. The inner surface 6 of the stave body 1 has no refractory, has a substantially flat casting surface, and has a rear side. A pipe 7 (mainly a steel pipe) constituting a flow passage for circulating a refrigerant (mainly cooling water) is embedded in the blast furnace steel shell (the same applies hereinafter). Although not specified in the manufacture of the stave body, since it is usually manufactured by casting, a pipe 7 for a cooling water flow path for cooling the stave is set at a predetermined position in advance during casting, and the stave body 1 is cast. When it is manufactured, it is cast integrally.
The thickness of the stave body 1 is made substantially the same as that of the conventional furnace wall brick because of the combination with the profile of the entire blast furnace. However, if the furnace volume needs to be increased, the thickness can be reduced.
【００１３】図２は図１における本発明ステーブでの冷
媒流通路用配管の配設状況を平面図で示したもので、ス
テーブ後面に配設する冷媒流通路用の配管７は、その配
管同士の間隔をできるだけ狭くして密に配設すると冷媒
の流通量を増大させることができ、ステーブ本体１に対
して冷却面を大きくすることにより、鋳物の熱伝率の良
好さと相俟って優れた冷却効果が発揮され、ステーブ内
面６への熱伝達の促進が図られる。そのためには冷媒流
通路用配管同士の間隔は、用いられる配管の径にもよる
が１８０ｍｍ以下に保つ必要があり、かくすることによ
りステーブ先端部の温度を９００℃以下に抑えることが
できる。FIG. 2 is a plan view showing the arrangement of the refrigerant flow passage pipes in the stave of the present invention shown in FIG. 1, and the refrigerant flow passage pipes 7 disposed on the rear surface of the stave are connected to each other. When the space between the staves is as small as possible and densely arranged, it is possible to increase the flow rate of the refrigerant, and by increasing the cooling surface with respect to the stave body 1, it is excellent in combination with good heat conductivity of the casting. A cooling effect is exhibited, and heat transfer to the inner surface 6 of the stave is promoted. For this purpose, the interval between the refrigerant flow passage pipes needs to be maintained at 180 mm or less, depending on the diameter of the pipes used. By doing so, the temperature at the end of the stave can be suppressed to 900 ° C. or less.
【００１４】図５はステーブ本体の内面に残存する炉壁
煉瓦厚みと、ステーブ（鋳物）先端部での温度の関係を
示したもので、当然のことながら煉瓦残存量（厚み）が
多ければステーブ先端部温度を低く保つことができる
が、煉瓦を有しなくとも９００℃を超えることはない。FIG. 5 shows the relationship between the thickness of the furnace wall brick remaining on the inner surface of the stave body and the temperature at the tip of the stave (casting). The tip temperature can be kept low, but does not exceed 900 ° C. without bricks.
【００１５】鋳物（鋳鉄）にとっては高炉内のＣＯ2 ガ
スによる材質への影響は大きく懸念される事項である。
鋳鉄の脆弱化および鋳鉄中の黒鉛の逸脱により材質の劣
化が下記反応によって起こる。 鋳鉄の脆弱化（Ｆｅ＋ＣＯ2 → ＦｅＯ＋ＣＯ） 黒鉛の逸脱 （ＣＯ2 ＋Ｃ → ２ＣＯ） しかし、この反応は温度によって支配され、本発明者ら
が調査した結果では、前記した９００℃以下の温度であ
れば鋳鉄におけるＣＯ2 と黒鉛（Ｃ）との反応は余り進
まず、７００℃以下であればその懸念は全くない。した
がって、前述のように効果的な冷却を心掛ける必要があ
る。For cast iron (cast iron), the influence of CO 2 gas in the blast furnace on the material is a matter of great concern.
Due to the brittleness of the cast iron and the deviation of the graphite in the cast iron, the deterioration of the material occurs by the following reaction. Weakening of cast iron (Fe + CO 2 → FeO + CO) Departure of graphite (CO 2 + C → 2CO) However, this reaction is governed by temperature. The reaction between the CO 2 and graphite (C) in the cast iron does not proceed very much, and there is no concern at 700 ° C. or less. Therefore, it is necessary to keep effective cooling as described above.
【００１６】ステーブ内面６は耐火物を有さないため、
高炉内の熱影響を諸に受けるので、それを防ぐためにス
テーブ表面に断熱層８を配設し、その影響度合いを少な
くすることは好ましいことである。図３はステーブ１の
内面６に複数個の断熱材９を配設した状態を断面図で示
したもので、ステーブ内面に凹部を設け、該凹部に断熱
材９を配置するとステーブ表面への熱影響を緩和するこ
とができる。この場合、断熱材の幅（Ｗ１）はステーブ
の凹部を形成するリブ１０の幅（Ｗ２）と同等程度かそ
れ以下にすることが望ましく、また、その厚さ（Ｔ）は
１２０ｍｍ以下程度でよい。さらに断熱材９の脱落を防
ぐ意味合いから図示したようにリブ１０に先拡がりのテ
ーパーを僅かでも付与した方がよい。Since the inner surface 6 of the stave has no refractory,
Since various influences of the heat in the blast furnace are received, it is preferable to dispose the heat insulating layer 8 on the stave surface to reduce the influence of the heat. FIG. 3 is a cross-sectional view showing a state in which a plurality of heat insulating materials 9 are provided on the inner surface 6 of the stave 1. A concave portion is provided on the inner surface of the stave. The effect can be mitigated. In this case, the width (W1) of the heat insulating material is desirably equal to or less than the width (W2) of the rib 10 forming the recess of the stave, and the thickness (T) may be about 120 mm or less. . Further, in order to prevent the heat insulating material 9 from falling off, it is better to give the rib 10 a slight taper of the pre-spread as shown in the figure.
【００１７】また、断熱材９程の厚みを有せずとも、ス
テーブ表面の全面に亘って断熱剤を配設、またはコーテ
ィングして断熱層８を形成することも断熱効果を得る上
で有効な手段である。この場合、断熱層８のステーブ表
面６への付着をより確実にするために、ステーブ表面６
に微小な凹凸を設けると断熱層の剥離脱落を防止するう
えでの効果が期待できる。Even if the heat insulating material is not as thick as the heat insulating material 9, it is also effective to provide a heat insulating agent over the entire surface of the stave, or to form a heat insulating layer 8 by coating the stave. Means. In this case, in order to more reliably attach the heat insulating layer 8 to the stave surface 6, the stave surface 6
If minute irregularities are provided on the surface, an effect in preventing peeling and falling off of the heat insulating layer can be expected.
【００１８】[0018]
【発明の効果】本発明によれば、ステーブ内面に炉壁耐
火物を持たず、かつ、ステーブを冷却するための冷媒配
管を密にしたためステーブを充分に冷却できるので、炉
内からの熱負荷を余り受けることがなく、従来の高炉稼
動初期の炉壁耐火物の損耗脱落によるステーブの寿命の
短命化を防ぐことができる。また、耐火物の局部的な脱
落がないため、炉内プロフィルを長期に亘り安定して持
続することができる等多くの利点を有する。According to the present invention, there is no furnace wall refractory on the inner surface of the stave, and since the refrigerant pipes for cooling the stave are made dense, the stave can be sufficiently cooled. Therefore, it is possible to prevent the life of the stave from being shortened due to wear and fall of the furnace wall refractory in the early stage of the conventional blast furnace operation. In addition, since there is no local dropout of the refractory, there are many advantages such that the furnace profile can be stably maintained for a long time.
【図１】本発明のステーブクーラーの側面を示した図FIG. 1 shows a side view of a stave cooler of the present invention.
【図２】図１における冷媒流通路用配管の配設状況を示
した平面図FIG. 2 is a plan view showing an arrangement state of piping for a refrigerant flow passage in FIG. 1;
【図３】本発明の他のステーブクーラーの側面を示した
図FIG. 3 shows a side view of another stave cooler of the present invention.
【図４】高炉の稼動期間とステーブクーラーの損耗の関
係を示した図FIG. 4 is a diagram showing the relationship between the operation period of a blast furnace and the wear of a stave cooler.
【図５】ステーブ内面残存レンガと鋳物先端部温度との
関係を示す図FIG. 5 is a diagram showing the relationship between the brick remaining on the inner surface of the stave and the temperature of the tip of the casting.
【図６】炉壁耐火物を鋳ぐるんだステーブクーラーの一
例を示す図FIG. 6 is a view showing an example of a stove cooler in which a furnace wall refractory is cast.
１ ステーブ本体 ２ 凹部 ３ 凸部 ４ 炉壁煉瓦 ５ 煉瓦支持金物 ６ 内面（表面） ７ 配管（鋼管） ８ 断熱層 ９ 断熱材 １０ リブ DESCRIPTION OF SYMBOLS 1 Stave main body 2 Concave part 3 Convex part 4 Furnace wall brick 5 Brick supporting hardware 6 Inner surface (surface) 7 Piping (steel pipe) 8 Heat insulation layer 9 Heat insulation material 10 Rib
───────────────────────────────────────────────────── フロントページの続き (72)発明者 岸上 和嗣 福岡県北九州市戸畑区大字中原46−59 新 日本製鐵株式会社機械・プラント事業部内 Ｆターム(参考） 4K015 CA04 CA05 4K051 AA01 HA01 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazushi Kishigami 46-59 Ohara Nakahara, Tobata-ku, Kitakyushu-shi, Fukuoka F-term in the Machinery & Plant Division, Nippon Steel Corporation 4K015 CA04 CA05 4K051 AA01 HA01
Claims (9)
ーブにおいて、予め高炉鉄皮側に該当する部分の冷却体
に冷媒流通用配管を埋設し、高炉内面側には炉壁耐火物
を設けず、内面をほぼ平坦に形成して前記冷媒流通用配
管を一体的に鋳ぐるんだ構造としたことを特徴とする高
炉用ステーブクーラー。In a stave to be mounted on an inner surface of a furnace shell of a blast furnace main body, a refrigerant circulation pipe is buried in advance in a cooling body of a portion corresponding to a blast furnace steel shell side, and a furnace wall refractory is provided on an inner surface of the blast furnace. A stove cooler for a blast furnace, wherein the inner surface is formed substantially flat and the refrigerant distribution pipe is integrally cast.
ーブにおいて、予め高炉鉄皮側に該当する部分の冷却体
に冷媒流通用配管を埋設し、高炉内面側には複数個の凹
部を設け、該凹部に断熱材が配設される如くなし、かつ
内面をほぼ平坦に形成し、高炉内面側には炉壁耐火物を
設けず、前記冷媒流通用配管と断熱材を一体的に鋳ぐる
んだ構造としたことを特徴とする高炉用ステーブクーラ
ー。2. A stave to be mounted on an inner surface of a furnace shell of a blast furnace main body, wherein a refrigerant circulation pipe is buried in advance in a portion of the cooling body corresponding to the blast furnace steel shell, and a plurality of recesses are formed on the inner surface of the blast furnace. A heat insulating material is provided in the concave portion, and the inner surface is formed substantially flat, and a furnace wall refractory is not provided on the inner surface side of the blast furnace. A stove cooler for blast furnaces that has a round structure.
ステーブにおいて、該ステーブ厚みを炉壁耐火物を鋳ぐ
るんで一体的構造としたステーブの厚みと、ほぼ同等の
厚みにしたことを特徴とする請求項１または請求項２記
載の高炉用ステーブクーラー。3. A stave attached to an inner surface of a furnace shell of the blast furnace main body, wherein a thickness of the stave is made substantially equal to a thickness of a stave formed by casting a furnace wall refractory into an integrated structure. The stave cooler for a blast furnace according to claim 1 or 2, wherein:
ステーブにおいて、高炉鉄皮側に該当する部分に配置す
る冷媒流通用配管が、その配管同士の間隔を密に配設し
たことを特徴とする請求項１ないし請求項３のいずれか
に記載の高炉用ステーブクーラー。4. A stave mounted on an inner surface of a furnace shell of the blast furnace main body, wherein a refrigerant circulation pipe disposed in a portion corresponding to the blast furnace steel side has a densely arranged interval between the pipes. The stove cooler for a blast furnace according to any one of claims 1 to 3, characterized in that:
ステーブにおいて、高炉鉄皮側に該当する部分に配置す
る冷媒流通用配管が、その配管同士の間隔が１８０ｍｍ
以下になるように配設したことを特徴とする請求項４記
載の高炉用ステーブクーラー。5. A stove mounted on the inner surface of a furnace shell of the blast furnace main body, wherein a refrigerant circulation pipe disposed at a portion corresponding to the blast furnace steel shell has a spacing between the pipes of 180 mm.
The stove cooler for a blast furnace according to claim 4, wherein the stove cooler is arranged as follows.
ステーブにおいて、高炉内面側に配設される断熱材の幅
をリブの幅とほぼ同等かそれ以下としたことを特徴とす
る請求項２ないし請求項５のいずれかに記載の高炉用ス
テーブクーラー。6. The stave mounted on the inner surface of the furnace shell of the blast furnace main body, wherein the width of the heat insulating material disposed on the inner surface side of the blast furnace is substantially equal to or less than the width of the rib. A stove cooler for a blast furnace according to any one of claims 2 to 5.
ステーブにおいて、高炉内面側に配設される断熱材の厚
み１２０ｍｍ以下としたことを特徴とする請求項２ない
し請求項６のいずれかに記載の高炉用ステーブクーラ
ー。7. The stave attached to the inner surface of the furnace shell of the blast furnace main body, wherein a thickness of a heat insulating material disposed on the inner surface side of the blast furnace is 120 mm or less. The stove cooler for blast furnace described in Crab.
ステーブにおいて、高炉内面側のステーブ表面の全面に
亘って断熱層を設けたことを特徴とする請求項１ないし
請求項７のいずれかに記載の高炉用ステーブクーラー。8. The stave mounted on the inner surface of the furnace shell of the blast furnace main body, wherein a heat insulating layer is provided on the entire surface of the stave surface on the inner surface side of the blast furnace. The stove cooler for blast furnace described in Crab.
微小な凹凸を設けたことを特徴とする高炉用ステーブク
ーラー。9. The stave cooler for a blast furnace according to claim 8, wherein minute irregularities are provided on the stave surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10256107A JP2000073110A (en) | 1998-08-27 | 1998-08-27 | Stave cooler for blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10256107A JP2000073110A (en) | 1998-08-27 | 1998-08-27 | Stave cooler for blast furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000073110A true JP2000073110A (en) | 2000-03-07 |
Family
ID=17287998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10256107A Withdrawn JP2000073110A (en) | 1998-08-27 | 1998-08-27 | Stave cooler for blast furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000073110A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006071212A (en) * | 2004-09-03 | 2006-03-16 | Nippon Mining & Metals Co Ltd | Furnace body water-cooling jacket |
| JP2007520683A (en) * | 2004-02-04 | 2007-07-26 | テクノロジカル リソーシズ プロプライエタリー リミテッド | Metallurgical vessel |
| CN114561501A (en) * | 2022-01-21 | 2022-05-31 | 中冶华天工程技术有限公司 | Blast furnace cooling wall with enhanced cooling |
-
1998
- 1998-08-27 JP JP10256107A patent/JP2000073110A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007520683A (en) * | 2004-02-04 | 2007-07-26 | テクノロジカル リソーシズ プロプライエタリー リミテッド | Metallurgical vessel |
| JP2006071212A (en) * | 2004-09-03 | 2006-03-16 | Nippon Mining & Metals Co Ltd | Furnace body water-cooling jacket |
| CN114561501A (en) * | 2022-01-21 | 2022-05-31 | 中冶华天工程技术有限公司 | Blast furnace cooling wall with enhanced cooling |
| CN114561501B (en) * | 2022-01-21 | 2023-09-29 | 中冶华天工程技术有限公司 | Forced cooling blast furnace cooling wall |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20051101 |