JP2827914B2 - Slow cooling stave cooler - Google Patents
Slow cooling stave coolerInfo
- Publication number
- JP2827914B2 JP2827914B2 JP19935094A JP19935094A JP2827914B2 JP 2827914 B2 JP2827914 B2 JP 2827914B2 JP 19935094 A JP19935094 A JP 19935094A JP 19935094 A JP19935094 A JP 19935094A JP 2827914 B2 JP2827914 B2 JP 2827914B2
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- stave cooler
- cooler
- slow cooling
- cylindrical body
- 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 - Lifetime
Links
Landscapes
- Blast Furnaces (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば高炉の特に炉口
部と呼ばれるシャフト上部に取り付ける緩冷却ステーブ
クーラに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slow cooling stove cooler which is mounted, for example, on a shaft of a blast furnace, in particular, a furnace opening.
【０００２】[0002]
【従来の技術】高炉の断面図の１例を図３に示すが、高
炉１の上部はシャフト部と呼ばれており、このうちのシ
ャフト上部の一部である炉口部１ａは、従来より煉瓦積
み構造が採用されている。しかし、このような煉瓦積み
構造では火入れ後２〜３年程度で積層煉瓦２が脱落し始
め、この脱落部において段差がつき、炉内円周方向に凹
凸が発生する。この凹凸の発生は炉口部装入物表面プロ
フィールを悪化させて炉内ガス流れを不安定にし、炉況
悪化の一因となる。2. Description of the Related Art An example of a sectional view of a blast furnace is shown in FIG. 3, in which the upper part of the blast furnace 1 is called a shaft part. A brick structure is employed. However, in such a brickwork structure, the laminated bricks 2 begin to fall off in about 2 to 3 years after burning, and a step is formed at the fallout portion, and irregularities are generated in the circumferential direction in the furnace. The occurrence of the unevenness deteriorates the furnace inlet charge surface profile, destabilizes the gas flow in the furnace, and contributes to the deterioration of the furnace condition.
【０００３】従って、前記脱落部には、図４に示すよう
に、耐火物３を吹きつけて炉内壁面の凹凸を無くすよう
にしているが、この耐火物３は寿命が短いので定期的な
吹きつけが必要となり、作業面，費用面での負担が大き
くなる。なお、図４中の４は炉体鉄皮、５は耐火物３の
吹きつけノズルを示す。Accordingly, as shown in FIG. 4, a refractory 3 is sprayed on the fall-off portion to eliminate irregularities on the inner wall of the furnace. Spraying is required, and the burden on work and cost is increased. In FIG. 4, reference numeral 4 denotes a furnace shell, and reference numeral 5 denotes a spray nozzle for the refractory 3.
【０００４】そこで、近年、特開昭６１−３７９０４号
公報に記載されているような、炉内側面に煉瓦６を抱き
込んだステーブクーラ７〔図５（ａ）参照〕や、また、
特開平３−２１１２１１号公報に記載されているよう
な、炉内側面に断熱系のキャスタブル８を吹きつけ又は
手塗りするステーブクーラ９〔図５（ｂ）参照〕が提案
されている。Therefore, in recent years, a stove cooler 7 (see FIG. 5 (a)) in which a brick 6 is held inside the furnace as described in JP-A-61-37904,
A stove cooler 9 [see FIG. 5 (b)] for spraying or hand-painting a heat-insulating castable 8 on the inner surface of a furnace as described in Japanese Patent Application Laid-Open No. Hei 3-211121 has been proposed.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、特開昭
６１−３７９０４号公報で提案されているステーブクー
ラであっても短期間で抱き込み煉瓦が脱落し、従来の煉
瓦積み構造の場合と同様の問題が発生する。加えて、ス
テーブクーラ自体が鋳物製で炉内側表面に抱き込み煉瓦
を設けた冷却構造（総括伝熱係数が３６〜４０kcal/m2h
℃程度）であるので、抱き込み煉瓦が脱落すると炉内面
が過冷却となって炉内から還元反応に使用される熱の一
部を奪い、鉄鉱原料の粉化現象が発生する。すると、こ
の影響でガス流れが不均一（片流れ）となり、炉況悪化
につながる。However, even in the stove cooler proposed in Japanese Patent Application Laid-Open No. 61-37904, the embracing bricks fall off in a short period of time, which is the same as that of the conventional brickwork structure. Problems arise. In addition, the stave cooler itself is made of casting and has a cooling structure with a embracing brick on the furnace inner surface (overall heat transfer coefficient is 36-40 kcal / m 2 h
When the embracing bricks fall off, the inner surface of the furnace is supercooled, and a portion of the heat used for the reduction reaction is removed from the furnace, and a powdering phenomenon of the iron ore raw material occurs. Then, the gas flow becomes non-uniform (one-sided flow) due to this effect, which leads to a deterioration in the furnace condition.
【０００６】また、特開平３−２１１２１１号公報で提
案されているステーブクーラは、初期状態では効果を発
揮するものの、キャスタブルの損耗が進行した場合に
は、従来の煉瓦積み構造の場合の補修と同様、炉内から
の吹きつけ補修が必要である。これを繰り返すとステー
ブクーラ本体に突設した固定スタッド１０の損耗が進行
してキャスタブルそのものの寿命が短くなる。また、熱
履歴のある残存キャスタブルの表面は強度が著しく低下
しているので、その表面にキャスタブルを吹きつけても
その境界面から剥離する可能性が高く、従来の煉瓦積み
構造の場合と同様の問題が発生する。The stave cooler proposed in Japanese Patent Application Laid-Open No. Hei 3-211 211 exhibits an effect in the initial state, but when the wear of the castables progresses, the stave cooler can be repaired in the conventional brick structure. Similarly, spray repair from inside the furnace is required. When this is repeated, the wear of the fixed studs 10 protruding from the stave cooler body progresses, and the life of the castable itself is shortened. In addition, since the surface of the remaining castable with heat history has significantly reduced strength, it is highly likely that the surface will be peeled off from the boundary even if the castable is sprayed on the surface, similar to the case of the conventional brickwork structure. Problems arise.
【０００７】本発明は、上記したような従来のステーブ
クーラにあった問題点に鑑みてなされたものであり、特
に高炉におけるシャフト上部の一部である炉口部に設置
した場合に過冷却を防止しつつ、炉内側面に配置した断
熱性耐火物の補修後を含めた寿命延長を可能とする緩冷
却ステーブクーラを提供することを目的としている。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the conventional stove cooler, and particularly, when installed in a furnace opening which is a part of an upper portion of a shaft in a blast furnace, supercooling is not performed. It is an object of the present invention to provide a mildly cooled stave cooler that can prevent damage and extend the life of a heat-insulating refractory disposed on the furnace inner surface, including after repair.
【０００８】[0008]
【課題を解決するための手段】上記した目的を達成する
ために、本発明の緩冷却ステーブクーラは、炉体鉄皮を
炉内熱負荷から保護するステーブクーラであって、ステ
ーブクーラ本体の炉内側面側から炉外側面側に複数の貫
通孔を開設し、これら貫通孔内に、これらの貫通孔に嵌
合する筒体と、この筒体の炉外側面側を閉塞する蓋体を
貫通して筒体内に突出し、筒体内に充填された断熱性耐
火物を冷却する冷却パイプとで構成された構造体を嵌入
しているのである。In order to achieve the above object, a slow cooling stave cooler according to the present invention is a stave cooler for protecting a furnace shell from a heat load in the furnace, wherein the stove cooler has a furnace. A plurality of through holes are opened from the inner side to the furnace outer side, and a cylindrical body fitted into these through holes and a lid closing the furnace outer side of the cylindrical body are penetrated into these through holes. Then, a structure constituted by a cooling pipe that protrudes into the cylinder and cools the heat-insulating refractory filled in the cylinder is inserted.
【０００９】[0009]
【作用】本発明の緩冷却ステーブクーラは、ステーブク
ーラ本体の炉内側面側に断熱性耐火物を設けた構造であ
るので、ステーブクーラの冷却能が従来のステーブクー
ラと比較して直接炉内に伝わらずに過冷却を防止でき
る。また、ステーブクーラ本体の炉内側面側に位置する
断熱性耐火物が許容限度まで損耗または脱落し補修する
必要が生じた場合には、構造体を炉外側に引き抜いた
後、新しい構造体を貫通孔内に挿入するだけで簡単に補
修が完了する。The slow cooling stove cooler of the present invention has a structure in which a heat insulating refractory is provided on the inner side of the furnace of the stave cooler body, so that the cooling capacity of the stave cooler is directly higher than that of the conventional stave cooler. The supercooling can be prevented without being transmitted. If the heat-resistant refractory located on the inner side of the furnace of the stave cooler is worn or dropped to the allowable limit and needs to be repaired, pull out the structure outside the furnace and then penetrate the new structure. Repair can be completed simply by inserting it into the hole.
【００１０】[0010]
【実施例】以下、本発明の緩冷却ステーブクーラを図１
に示す１実施例に基づいて説明する。図１は本発明の緩
冷却ステーブクーラの１実施例を示す図面で、（ａ）は
斜視図、（ｂ）は炉外側からみた正面図、（ｃ）は断面
図である。FIG. 1 shows a slow cooling stove cooler of the present invention.
A description will be given based on one embodiment shown in FIG. 1A and 1B are drawings showing an embodiment of a slow cooling stave cooler according to the present invention, wherein FIG. 1A is a perspective view, FIG. 1B is a front view as viewed from outside the furnace, and FIG. 1C is a sectional view.
【００１１】図１において、１１はステーブクーラ本体
であり、従来のステーブクーラと同様、水冷パイプ１１
ａを介して内部に供給される冷却水によって冷却される
構造であるが、本発明ではステーブクーラ本体１１の炉
内側面側から炉外側面側に複数の貫通孔１１ｂを開設し
ているので、図１（ｂ）に示すように、これら貫通孔１
１ｂを回避して水冷パイプ１１ａが埋設されている。In FIG. 1, reference numeral 11 denotes a stave cooler main body, similar to a conventional stave cooler.
In the present invention, a plurality of through holes 11b are opened from the inner side of the furnace of the stave cooler main body 11 to the outer side of the furnace. As shown in FIG. 1B, these through holes 1
A water cooling pipe 11a is buried avoiding 1b.
【００１２】１２は前記した貫通孔１１ｂ内に嵌入配置
する構造体であり、貫通孔１１ｂの内径と略同径の外径
を有する筒体１２ａと、この筒体１２ａの炉外側面側を
閉塞し、その中心部に貫通孔１２ｂａを開設した蓋体１
２ｂと、この蓋体１２ｂの貫通孔１２ｂａを通って炉外
側から筒体１２ａ内に突出状に配置された冷却パイプ１
２ｃと、これら筒体１２ａ，蓋体１２ｂ及び冷却パイプ
１２ｃで形成された環状空間内に充填される断熱性耐火
物１２ｄとで構成されている。Reference numeral 12 denotes a structure which is fitted into the through hole 11b and has a cylindrical body 12a having an outer diameter substantially equal to the inner diameter of the through hole 11b, and a furnace outer side of the cylindrical body 12a is closed. And a lid 1 having a through hole 12ba at the center thereof.
2b and a cooling pipe 1 protruding from the outside of the furnace into the cylindrical body 12a through the through hole 12ba of the lid 12b.
2c and a heat insulating refractory 12d filled in an annular space formed by the cylindrical body 12a, the lid 12b, and the cooling pipe 12c.
【００１３】ところで、前記構造体１２を構成する断熱
性耐火物１２ｄとしては、例えばシャモット系耐火物で
熱伝導率λが１．０〜１．５kcal／mh℃程度の材料を採
用することが望ましい。こうすれば、貫通孔１１ｂの大
きさ，数を適宜選定することよって任意の冷却能力を得
ることができるからである。As the heat-insulating refractory 12d constituting the structure 12, it is desirable to use, for example, a chamotte-based refractory having a thermal conductivity λ of about 1.0 to 1.5 kcal / mh ° C. . This is because an arbitrary cooling capacity can be obtained by appropriately selecting the size and number of the through holes 11b.
【００１４】一例として、貫通孔１１ｂの総面積を炉内
側表面積の５０％とすべく貫通孔１１ｂの大きさ，数を
決定し、構造体１２を構成する断熱性耐火物１２ｄとし
て熱伝導率λが１．５kcal／mh℃のシャモット系耐火物
を使用すれば、水冷却したステーブクーラ全体として
は、２０kcal/m2h℃の総括伝熱係数（冷却能力）とな
り、従来のステーブクーラの約半分の数値となる。さら
に、ステーブクーラ本体１１の冷媒として水に代えてＮ
2 を使用すれば（重量流量１００ｋｇ／Ｈ）、ステーブ
クーラ本体１１の冷却能力が半減するので、ステーブク
ーラ全体として約５〜１０kcal/m2h℃の総括伝熱係数
（冷却能力）となる。As an example, the size and number of the through holes 11b are determined so that the total area of the through holes 11b is set to 50% of the surface area inside the furnace, and the thermal conductivity λ is used as the heat insulating refractory 12d constituting the structure 12. However, if a 1.5 mcal / mh ° C chamotte refractory is used, the water-cooled stave cooler as a whole has a total heat transfer coefficient (cooling capacity) of 20 kcal / m 2 h ° C, which is about half that of the conventional stave cooler. It becomes the numerical value of. Further, instead of water as the refrigerant of the stave cooler body 11, N
If 2 is used (weight flow rate 100 kg / H), the cooling capacity of the stave cooler main body 11 is reduced by half, so that the overall heat transfer coefficient (cooling capacity) of the stave cooler as a whole is about 5 to 10 kcal / m 2 h ° C.
【００１５】なお、本発明の緩冷却ステーブクーラの設
置位置は、比較的に炉内の熱負荷が低いシャフト上部で
あるから、冷媒として水に代えてＮ2 ガスを使用するこ
とができる。また、同様の理由によって、構造体１２を
構成する断熱性耐火物１２ｄの冷媒としてＮ2 ガスを使
用すれば、冷却による延命と緩冷却を同時に達成でき
る。Since the slow cooling stove cooler of the present invention is installed at the upper part of the shaft where the heat load in the furnace is relatively low, N 2 gas can be used instead of water as the refrigerant. For the same reason, if N 2 gas is used as the refrigerant of the heat-insulating refractory 12 d constituting the structure 12, the life extension by cooling and the slow cooling can be achieved simultaneously.
【００１６】本実施例では、断熱性耐火物１２ｄの保持
を強固にするために、冷却パイプ１２ｃの外周に複数の
スタッド１２ｃａを突設したものを開示しているが、こ
れらスタッド１２ｃａは必須ではない。また、貫通孔１
１ｂの形状は、本実施例では角部を円弧とした正方形の
ものを示したが、円形等適宜の形状を採用してもよい。
さらに、本実施例ではステーブクーラ本体１１の炉内側
面側における貫通孔１１ｂの開設位置以外にも耐火物１
１ｃを設置したものを開示したが、この耐火物１１ｃも
必須のものではない。This embodiment discloses a cooling pipe 12c having a plurality of studs 12ca projecting therefrom in order to strengthen the holding of the heat insulating refractory 12d. However, these studs 12ca are not essential. Absent. Also, the through hole 1
In this embodiment, the shape of 1b is a square whose corners are arcs, but an appropriate shape such as a circle may be adopted.
Further, in the present embodiment, the refractory 1
Although the refractory 11c is disclosed, the refractory 11c is not essential.
【００１７】次に本発明の緩冷却ステーブクーラを高炉
１の炉口部１ａに設置し、操業によって断熱性耐火物１
２ｄの炉内側部分が損耗した場合の補修手順を図２に基
づいて説明する。Next, the slow cooling stove cooler of the present invention is installed in the furnace opening 1a of the blast furnace 1, and the heat insulating refractory 1 is operated by the operation.
The repair procedure in the case where the furnace inside portion 2d is worn will be described with reference to FIG.
【００１８】まず、断熱性耐火物１２ｄの炉内側部分が
損耗した場合〔（ａ）図〕には、炉体鉄皮４に蓋体１２
ｂを介して構造体１２を取り付けているボルトとナット
（図示せず）を緩めて本発明の緩冷却ステーブクーラか
ら損耗した断熱性耐火物１２ｄを有する構造体１２を炉
外に引き抜く〔（ｂ）図〕。First, when the inside of the furnace of the heat insulating refractory 12d is worn [FIG.
b, the bolts and nuts (not shown) to which the structure 12 is attached are loosened, and the structure 12 having the insulated refractory 12d worn out from the slow cooling stave cooler of the present invention is pulled out of the furnace [(b Figure).
【００１９】次に、新しい構造体１２を前記引き抜いた
貫通孔１１ｂ部分に嵌入し、ボルトとナットを締めつけ
て蓋体１２ｂを介して炉体鉄皮４に構造体１２を取り付
ける。そしてその後、筒体１２ａと炉体鉄皮４間にモル
タルを注入すれば補修は完了する〔（ｃ）図〕。Next, a new structure 12 is fitted into the through hole 11b which has been pulled out, and bolts and nuts are tightened to attach the structure 12 to the furnace shell 4 via the lid 12b. After that, if mortar is injected between the cylindrical body 12a and the furnace shell 4, the repair is completed [FIG.
【００２０】[0020]
【発明の効果】以上説明したように、本発明の緩冷却ス
テーブクーラによれば、過冷却を防止できるとともに、
断熱性耐火物の寿命の延長が図れる。また、断熱性耐火
物が許容限度まで損耗または脱落し補修する場合にも簡
単に補修が行え、かつ新しい構造体を嵌入するので、補
修後の断熱性耐火物の寿命が長くなる。As described above, according to the slow cooling stave cooler of the present invention, supercooling can be prevented and
The life of the heat insulating refractory can be extended. Further, even when the insulative refractory is worn or dropped to an allowable limit and repaired, repair can be easily performed and a new structure is inserted, so that the life of the insulated refractory after repair is extended.
【００２１】なお、本実施例では本発明の緩冷却ステー
ブクーラを高炉の炉口部に設置したものについて説明し
たが、設置場所はこれに限らず、反応炉の水冷金物とし
ても使用可能である。In this embodiment, the slow cooling stove cooler of the present invention is installed at the furnace opening of the blast furnace. However, the installation place is not limited to this, and the stove cooler can be used as a water-cooled metal for a reaction furnace. .
【図１】本発明の緩冷却ステーブクーラの１実施例を示
す図面で、（ａ）は斜視図、（ｂ）は炉外側からみた正
面図、（ｃ）は断面図である。1A and 1B are drawings showing one embodiment of a slow cooling stove cooler of the present invention, wherein FIG. 1A is a perspective view, FIG. 1B is a front view as viewed from outside the furnace, and FIG. 1C is a cross-sectional view.
【図２】本発明の緩冷却ステーブクーラの断熱性耐火物
が損耗した場合の補修手順を順を追って説明する図であ
る。FIG. 2 is a view for sequentially explaining a repair procedure when the heat-insulating refractory of the slow cooling stove cooler of the present invention is worn.
【図３】高炉の炉体構造を説明する断面図である。FIG. 3 is a sectional view illustrating a furnace body structure of a blast furnace.
【図４】従来の炉口部煉瓦の補修状況の説明図である。FIG. 4 is an explanatory view showing a state of repair of a conventional furnace opening brick.
【図５】（ａ）は特開昭６１−３７９０４号公報に記載
されたステーブクーラの説明図、（ｂ）は特開平３−２
１１２１１号公報に記載されたステーブクーラの説明図
である。FIG. 5 (a) is an explanatory view of a stave cooler described in JP-A-61-37904, and FIG.
It is explanatory drawing of the stave cooler described in 11211 gazette.
４ 炉体鉄皮 １１ ステーブクーラ本体 １１ｂ 貫通孔 １２ 構造体 １２ａ 筒体 １２ｂ 蓋体 １２ｃ 冷却パイプ １２ｄ 断熱性耐火物 4 Furnace Shell 11 Stave Cooler Main Body 11b Through Hole 12 Structure 12a Cylindrical Body 12b Lid 12c Cooling Pipe 12d Insulated Refractory
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) C21B 7/10 301 C21B 7/10 302 C21B 7/10 305 F27D 1/12──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) C21B 7/10 301 C21B 7/10 302 C21B 7/10 305 F27D 1/12
Claims (1)
ーブクーラであって、ステーブクーラ本体の炉内側面側
から炉外側面側に複数の貫通孔を開設し、これら貫通孔
内に、これらの貫通孔に嵌合する筒体と、この筒体の炉
外側面側を閉塞する蓋体を貫通して筒体内に突出し、筒
体内に充填された断熱性耐火物を冷却する冷却パイプと
で構成された構造体を嵌入して成ることを特徴とする緩
冷却ステーブクーラ。1. A stave cooler for protecting a furnace shell from heat load in a furnace, wherein a plurality of through-holes are opened from a furnace inner surface side to a furnace outer surface side of a stave cooler main body. A cooling pipe that penetrates a cylindrical body fitted into these through holes and a lid that closes the furnace outer surface side of the cylindrical body, protrudes into the cylindrical body, and cools the heat-insulating refractory filled in the cylindrical body. A slow cooling stove cooler characterized by being fitted with a structure constituted by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19935094A JP2827914B2 (en) | 1994-08-24 | 1994-08-24 | Slow cooling stave cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19935094A JP2827914B2 (en) | 1994-08-24 | 1994-08-24 | Slow cooling stave cooler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0860213A JPH0860213A (en) | 1996-03-05 |
| JP2827914B2 true JP2827914B2 (en) | 1998-11-25 |
Family
ID=16406306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19935094A Expired - Lifetime JP2827914B2 (en) | 1994-08-24 | 1994-08-24 | Slow cooling stave cooler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2827914B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5353118B2 (en) * | 2008-08-25 | 2013-11-27 | 新日鐵住金株式会社 | Blast furnace operation method |
| LU92346B1 (en) * | 2013-12-27 | 2015-06-29 | Wurth Paul Sa | Stave cooler for a metallurgical furnace and method for protecting a stave cooler |
| CN109280728A (en) * | 2018-11-07 | 2019-01-29 | 中冶赛迪工程技术股份有限公司 | A kind of blast furnace cooling stave structure |
-
1994
- 1994-08-24 JP JP19935094A patent/JP2827914B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0860213A (en) | 1996-03-05 |
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