JPH11293323A - Sleeve structure of tap hole for converter - Google Patents
Sleeve structure of tap hole for converterInfo
- Publication number
- JPH11293323A JPH11293323A JP10095898A JP10095898A JPH11293323A JP H11293323 A JPH11293323 A JP H11293323A JP 10095898 A JP10095898 A JP 10095898A JP 10095898 A JP10095898 A JP 10095898A JP H11293323 A JPH11293323 A JP H11293323A
- Authority
- JP
- Japan
- Prior art keywords
- inlet side
- sleeve
- tap hole
- hole
- inner diameter
- 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.)
- Pending
Links
Landscapes
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は転炉用出鋼口スリー
ブ構造に関する。The present invention relates to a tapping sleeve structure for a converter.
【０００２】[0002]
【従来の技術】転炉の出鋼口には耐火物からなるスリー
ブが設けられ、出鋼口から溶鋼をスムーズに流出させる
ようにしている。2. Description of the Related Art A sleeve made of a refractory material is provided at a tap hole of a converter so that molten steel can flow out of the tap hole smoothly.
【０００３】従来から用いられている上記のスリーブ
は、図４に断面図として示すようにリング状の耐火性ブ
ロック１，１…を軸方向に接合してスリーブ構造とされ
たものがある。なかには上記耐火性ブロック１，１…の
孔径を出口側にかけて段階的に減少させるようになされ
たもの（例えば特公平２−１１６５１号公報）がある。As the above-mentioned sleeve conventionally used, there is a sleeve structure in which ring-shaped refractory blocks 1, 1... Are joined in the axial direction as shown in a sectional view in FIG. Among them, there is one in which the hole diameter of the refractory blocks 1, 1,... Is gradually reduced toward the outlet side (for example, Japanese Patent Publication No. 2-11651).
【０００４】[0004]
【発明が解決しようとする課題】しかるに上記従来の分
割構造によるものでは、温度差の大きい使用条件に耐用
するため耐火性ブロック（煉瓦）が膨張・収縮を繰り返
すことにより耐火性ブロック１，１…の接合部である目
地部２，２…が緩み、それぞれの目地部２，２…から溶
鋼が侵入し、局部的な損傷をきたすという問題点があ
る。これは耐火性ブロックの内径を出口側にかけて段階
的に減少させたものにおいても同様である。一方、スリ
ーブの流出孔３の内径を均一にしたストレートの孔構造
の場合、図４に矢印で示すように、溶鋼の流れは内周面
にそっては流れず、中心部を落ちて行く流れとなる。そ
のため流下する溶鋼と内周面との間に空間ができ、ここ
に乱流が発生し、この乱流の発生により内周面は強い摩
耗条件にさらされ、また出口側付近では炉外からの空気
の巻き込みも発生して酸化損傷が起こるという問題があ
る。However, in the above-mentioned conventional divided structure, the fire-resistant blocks (bricks) repeat expansion and contraction in order to withstand use conditions having a large temperature difference, so that the fire-resistant blocks 1, 1,... Are loosened, and molten steel invades from the joints 2, 2,... To cause local damage. The same applies to the case where the inner diameter of the refractory block is reduced stepwise toward the outlet side. On the other hand, in the case of a straight hole structure in which the inner diameter of the outflow hole 3 of the sleeve is uniform, the flow of the molten steel does not flow along the inner peripheral surface but flows down the center as shown by arrows in FIG. Becomes Therefore, a space is created between the flowing molten steel and the inner peripheral surface, where turbulence occurs, and the turbulent flow causes the inner peripheral surface to be exposed to strong wear conditions. There is a problem that air entrainment occurs and oxidative damage occurs.
【０００５】またスリーブの入口部では、図５に示すよ
うに溶鋼流が開口縁に衝突して流出孔３にスムーズに流
入せず、開口縁のａ部分が欠落したり、ｂのようにひび
割れが発生し、さらには内周面の損傷ｃが乱流によって
むらに発生し、これらが相俟ってスリーブの耐用期間を
著しく早める結果となる。Further, at the inlet of the sleeve, as shown in FIG. 5, the molten steel flow collides with the opening edge and does not flow smoothly into the outflow hole 3, so that a portion of the opening edge is missing or cracked as shown in b. And turbulence causes unevenness c of the inner peripheral surface, which together result in significantly shortening the service life of the sleeve.
【０００６】[0006]
【課題を解決するための手段】本発明は、内周面の損傷
を軽減し、漏鋼を生じることのない転炉用出鋼口スリー
ブ構造を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a taphole sleeve structure for a converter which reduces damage to an inner peripheral surface and does not cause steel leakage.
【０００７】上記課題を解決する手段として本発明は、
耐火材により軸線方向に流出孔が貫通されたスリーブ本
体を一体成形し、この流出孔をその内径が入口側から出
口側にかけて次第に減少するテーパー状に形成したこと
を特徴とする。[0007] As means for solving the above problems, the present invention provides:
A sleeve body having an outflow hole penetrated in the axial direction by a refractory material is integrally formed, and the outflow hole is formed in a tapered shape whose inner diameter gradually decreases from an inlet side to an outlet side.
【０００８】好ましくは前記流出孔の入口側開口縁にア
ール状の面取りを施すことにより溶鋼が流出孔の入口側
に流入する際に乱流を起こすことなくスムーズに流入
し、乱流の発生を防ぐことができる。Preferably, a rounded chamfer is formed on the opening edge of the outlet hole on the inlet side so that the molten steel flows smoothly without causing turbulence when flowing into the inlet side of the outlet hole, thereby preventing the generation of turbulent flow. Can be prevented.
【０００９】前記流出孔のテーパーは、その孔の入口側
と出口側との内径差が入口側内径の５／１００〜２５／
１００とすることが溶鋼を内周面にそわせて流下させる
ことができ、乱流が生じることを防ぐうえで好ましい。[0009] The taper of the outlet hole is such that the inner diameter difference between the inlet side and the outlet side of the hole is 5 / 100-25 / 25 of the inner diameter on the inlet side.
A value of 100 is preferable in order to allow the molten steel to flow down along the inner peripheral surface and to prevent turbulence.
【００１０】また前記面取りは、スリーブ本体の入口側
の肉厚ｔに対し１ｔ〜５ｔの半径を有するアールとする
ことが望ましい。It is preferable that the chamfer is a radius having a radius of 1t to 5t with respect to the thickness t of the inlet side of the sleeve body.
【００１１】[0011]
【発明の実施の形態】以下、本発明を図面に示す実施の
形態を参照して説明する。図１は本発明によるスリーブ
構造の一実施形態を示す断面図で、スリーブ本体１０は
その軸線方向に貫通する流出孔１１を有し、この流出孔
１１は入口側１１ａから出口側１１ｂにかけて内径が次
第に減少するテーパー状に形成された一体成形品であ
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings. FIG. 1 is a sectional view showing an embodiment of a sleeve structure according to the present invention. A sleeve body 10 has an outlet hole 11 penetrating in the axial direction, and the outlet hole 11 has an inner diameter from an inlet side 11a to an outlet side 11b. It is an integrally molded article formed in a tapered shape that gradually decreases.
【００１２】前記流出孔１１の入口側１１ａの開口縁は
アール状に面取り１２が施されている。The opening edge on the inlet side 11a of the outlet hole 11 is chamfered 12 in a round shape.
【００１３】上記スリーブ本体１０の材質としては、主
原料としてＭｇＯを重量比８０〜９９％、黒鉛１〜２０
％で構成されるＭｇＯ−Ｃ煉瓦が用いられる。As a material of the sleeve body 10, MgO as a main raw material is 80 to 99% by weight and graphite is 1 to 20%.
% MgO-C brick is used.
【００１４】上記スリーブ本体１０の大きさは、長さＬ
＝１０００〜２０００ｍｍ、流出孔１１の入口側１１ａ
の内径ｄ１＝１００〜３００ｍｍ、流出孔１１の入口側
１１ａの内径ｄ１と出口側１１ｂの内径ｄ２との差ｄ１
−ｄ２は入口側１１ａの内径ｄ１の５／１００〜２５／
１００とされ、好ましくは１０〜１００ｍｍのテーパー
孔とされる。またスリーブ本体１０の外径Ｄは入口側１
１ａの流出孔１１の内径ｄ１＋５０〜２５０ｍｍとされ
る。The size of the sleeve body 10 is a length L
= 1000-2000 mm, inlet side 11a of outlet hole 11
Inner diameter d 1 = 100 to 300 mm, the difference d 1 between the inner diameter d 1 of the inlet side 11a of the outflow hole 11 and the inner diameter d 2 of the outlet side 11b.
-D 2 is the inner diameter d 1 of the inlet side 11a 5/100 to 25 /
100, preferably a tapered hole of 10 to 100 mm. The outer diameter D of the sleeve body 10 is 1 on the inlet side.
The inner diameter d 1 of the outflow hole 11 of 1a is set to +50 to 250 mm.
【００１５】前記アール状の面取り１２の半径Ｒは、ス
リーブ本体１０の入口側１１ａの肉厚ｔに対し１ｔ〜５
ｔとされる。The radius R of the round chamfer 12 is 1 to 5 times the thickness t of the inlet side 11a of the sleeve body 10.
t.
【００１６】前記スリーブ本体１０の長さＬが１０００
ｍｍより短い、つまり入口側１１ａから出口側１１ｂま
での距離が短いとテーパー孔の効果が十分に発揮され
ず、また現在の転炉の構造では２０００ｍｍを超える長
さのスリーブは使用し得ない。前記流出孔１１の入口側
１１ａと出口側１１ｂとの内径差が前記範囲を超えると
入口側１１ａへの溶鋼の流入量と出口側１１ｂからの排
出量にアンバランスが生じて逆に不安定になる。The length L of the sleeve body 10 is 1000
If the length is shorter than 0.1 mm, that is, if the distance from the inlet side 11a to the outlet side 11b is short, the effect of the tapered hole is not sufficiently exhibited, and a sleeve having a length exceeding 2000 mm cannot be used in the current converter structure. If the difference in inner diameter between the inlet side 11a and the outlet side 11b of the outlet hole 11 exceeds the above range, the inflow of molten steel into the inlet side 11a and the discharge amount from the outlet side 11b become unbalanced, and conversely become unstable. Become.
【００１７】前記流出孔１１の入口側１１ａの面取り１
２は、前記範囲より小さいと面取り効果をもたらすこと
ができず、また前記範囲より大きいと入口側１１ａの端
部の肉厚が薄くなって強度的に弱くなり、割れ等の損傷
を起こしやすくなる。Chamfer 1 on the inlet side 11a of the outflow hole 11
2 is less than the above range, it cannot provide a chamfering effect, and if it is larger than the above range, the thickness of the end of the inlet side 11a becomes thin and weak in strength, and it is easy to cause damage such as cracks. .
【００１８】以上のように構成される本発明のスリーブ
構造によれば、図３に矢印で示すようにスリーブ本体１
０の入口側１１ａから流入する溶鋼はその入口側１１ａ
の開口縁の面取り１２にそって流出孔１１内にスムーズ
に流入し、流出孔１１に入った溶鋼は図２（Ａ）に示す
ようにそのテーパー状の内周面にそって流下し、内周面
と溶鋼との間に空隙ができず、乱流を起こすことが防が
れる。そして流出孔１１の内周面には目地部が全く存在
しないので局部的な損傷の発生がなく、図２（Ｂ）に示
すようにその損傷ｃは滑らかで均一な損傷状態となって
安定した耐用が得られる。According to the sleeve structure of the present invention configured as described above, as shown by the arrow in FIG.
The molten steel flowing from the inlet side 11a of the
2A smoothly flows into the outflow hole 11 along the chamfer 12 of the opening edge of the opening, and the molten steel entering the outflow hole 11 flows down along the tapered inner peripheral surface as shown in FIG. No air gap is formed between the peripheral surface and the molten steel, which prevents turbulence. Since there is no joint on the inner peripheral surface of the outflow hole 11, there is no local damage, and the damage c is smooth and uniform as shown in FIG. The service life is obtained.
【００１９】[0019]
【発明の効果】以上説明したように本発明によれば、耐
火材により軸線方向に流出孔が貫通されたスリーブ本体
を一体成形し、この流出孔の内径を入口側から出口側に
かけて次第に減少するテーパー状に形成したことによ
り、溶鋼が流下する流出孔内に継目が存在しないので溶
鋼の流れがスムーズとなり、孔の内周面の局部的な損傷
を生じることがなく、漏鋼に至ることがない。As described above, according to the present invention, the sleeve body having the outflow hole penetrated in the axial direction by the refractory material is integrally formed, and the inner diameter of the outflow hole gradually decreases from the inlet side to the outlet side. Due to the tapered shape, there is no seam in the outflow hole where the molten steel flows down, so the flow of the molten steel becomes smooth, without causing local damage to the inner peripheral surface of the hole, it is possible to lead to steel leakage Absent.
【００２０】また孔は入口側から出口側にかけてテーパ
ー状とされているので溶鋼は流出孔の内周面にそうよう
に流れ、内周部分で乱流が生じず、スムーズに流下して
内周面の損傷を小さく抑えることができる。Further, since the hole is tapered from the inlet side to the outlet side, the molten steel flows like this on the inner peripheral surface of the outflow hole, and turbulence does not occur at the inner peripheral portion, so that the molten steel flows down smoothly to the inner peripheral surface. Surface damage can be kept small.
【００２１】さらに流出孔の入口側の開口縁にアール状
の面取りを施せば、流出孔内に溶鋼がスムーズに流入
し、その孔の開口縁に割れ等の損傷を起こすことが防が
れる。Furthermore, if the opening edge on the inlet side of the outflow hole is chamfered, molten steel can smoothly flow into the outflow hole, thereby preventing damage such as a crack at the opening edge of the opening.
【図１】本発明による転炉用出鋼口スリーブ構造の一実
施形態を示す断面図。FIG. 1 is a cross-sectional view showing an embodiment of a steelmaking tapping sleeve structure for a converter according to the present invention.
【図２】（Ａ），（Ｂ）は図１のスリーブ構造による溶
鋼の流れを示す説明図。FIGS. 2A and 2B are explanatory views showing the flow of molten steel by the sleeve structure of FIG. 1;
【図３】図１のスリーブ構造による溶鋼の流入状況を示
す説明図。FIG. 3 is an explanatory view showing the inflow state of molten steel by the sleeve structure of FIG. 1;
【図４】従来のスリーブ構造および溶鋼の流れを示す説
明図。FIG. 4 is an explanatory view showing a conventional sleeve structure and a flow of molten steel.
【図５】従来のスリーブ構造による溶鋼の流入の不具合
を示す説明図。FIG. 5 is an explanatory diagram showing a problem of inflow of molten steel due to a conventional sleeve structure.
１ 耐火性ブロック ２ 目地部 ３，１１ 流出孔 １０ スリーブ本体 １１ａ 入口側 １１ｂ 出口側 １２ 面取り DESCRIPTION OF SYMBOLS 1 Fire resistant block 2 Joint part 3,11 Outflow hole 10 Sleeve body 11a Inlet side 11b Outlet side 12 Chamfer
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【手続補正書】[Procedure amendment]
【提出日】平成１１年７月５日[Submission date] July 5, 1999
【手続補正１】[Procedure amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】特許請求の範囲[Correction target item name] Claims
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【特許請求の範囲】[Claims]
【手続補正２】[Procedure amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００７[Correction target item name] 0007
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【０００７】上記課題を解決する手段として本発明は、
耐火材により軸線方向に流出孔が貫通されたスリーブ本
体を一体成形し、この流出孔をその内径が入口側から出
口側にかけて次第に減少するテーパー状に形成されてい
るとともに前記流出孔の入口側開口縁にアール状の面取
りが施されており、前記流出孔のテーパーは、その孔の
入口側と出口側との内径差が入口側内径の５／１００〜
２５／１００とされ、また前記面取りは、スリーブ本体
の入口側の肉厚ｔに対し１ｔ〜５ｔの半径を有するアー
ルとされている。[0007] As means for solving the above problems, the present invention provides:
A sleeve main body having an outflow hole penetrated in the axial direction by a refractory material is integrally formed. The edge has a round chamfer, and the taper of the outlet hole is such that the difference in inner diameter between the inlet side and the outlet side of the hole is 5/100 to the inlet side inner diameter.
25/100, and the chamfer is a radius having a radius of 1t to 5t with respect to the thickness t on the inlet side of the sleeve main body.
【手続補正３】[Procedure amendment 3]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００８[Correction target item name] 0008
【補正方法】削除[Correction method] Deleted
【手続補正４】[Procedure amendment 4]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００９[Correction target item name] 0009
【補正方法】削除[Correction method] Deleted
【手続補正５】[Procedure amendment 5]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１０[Correction target item name] 0010
【補正方法】削除[Correction method] Deleted
【手続補正６】[Procedure amendment 6]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００２１[Correction target item name] 0021
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００２１】さらに流出孔の入口側の開口縁にアール状
の面取りが施されているので、流出孔内に溶鋼がスムー
ズに流入し、その孔の開口縁に割れ等の損傷を起こすこ
とが防がれ、前記流出孔の入口側の内径と出口側の内径
との差を５／１００〜２５／１００としかつ面取りのア
ールの半径を入口側の肉厚ｔに対し１ｔ〜５ｔとしたこ
とによって上記効果を確実なものとし得ることができ
る。Furthermore, since the opening edge on the inlet side of the outlet hole is chamfered in a round shape, molten steel can smoothly flow into the outlet hole to prevent damage such as cracks on the opening edge of the hole. The difference between the inner diameter on the inlet side and the inner diameter on the outlet side of the outlet hole is set to 5/100 to 25/100, and the radius of the chamfered round is set to 1 to 5 to the thickness t on the inlet side. The above effects can be ensured.
Claims (4)
たスリーブ本体を一体成形し、この流出孔をその内径が
入口側から出口側にかけて次第に減少するテーパー状に
形成したことを特徴とする転炉用出鋼口スリーブ構造。A sleeve body having an outflow hole penetrated in the axial direction by a refractory material is integrally formed, and the outflow hole is formed in a tapered shape whose inner diameter gradually decreases from an inlet side to an outlet side. Steel tapping sleeve structure for converter.
がアール状に面取りされている請求項１記載の転炉用出
鋼口スリーブ構造。2. The steel tapping sleeve structure for a converter according to claim 1, wherein an opening-side opening edge of the outlet hole of the sleeve body is chamfered in a round shape.
との差が入口側内径の５／１００〜２５／１００である
請求項１または２記載の転炉用出鋼口スリーブ構造。3. The steel tapping sleeve structure for a converter according to claim 1, wherein the difference between the inner diameter on the inlet side and the inner diameter on the outlet side of the outlet hole is 5/100 to 25/100 of the inner diameter on the inlet side. .
ｔに対し１ｔ〜５ｔの半径を有するアールとされている
請求項２または３記載の転炉用出鋼口スリーブ構造。4. The steel tapping sleeve structure for a converter according to claim 2, wherein the chamfer is a radius having a radius of 1t to 5t with respect to a thickness t on an inlet side of the sleeve main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10095898A JPH11293323A (en) | 1998-04-13 | 1998-04-13 | Sleeve structure of tap hole for converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10095898A JPH11293323A (en) | 1998-04-13 | 1998-04-13 | Sleeve structure of tap hole for converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11293323A true JPH11293323A (en) | 1999-10-26 |
Family
ID=14287874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10095898A Pending JPH11293323A (en) | 1998-04-13 | 1998-04-13 | Sleeve structure of tap hole for converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11293323A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006011269A1 (en) * | 2004-07-29 | 2006-02-02 | Krosakiharima Corporation | Discharging hole for molten metal in molten metal container, method of operating converter with the discharging hole, and sleeve exchanging device at discharging hole of molten metal container |
| JP2008501854A (en) * | 2004-06-04 | 2008-01-24 | リフラクトリー・インテレクチュアル・プロパティー・ゲー・エム・ベー・ハー・ウント・コ・カーゲー | Hot water outlet pipe |
| JP2010047795A (en) * | 2008-08-20 | 2010-03-04 | Sumitomo Metal Ind Ltd | Sleeve for tapping hole of converter and method for producing hot metal |
-
1998
- 1998-04-13 JP JP10095898A patent/JPH11293323A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008501854A (en) * | 2004-06-04 | 2008-01-24 | リフラクトリー・インテレクチュアル・プロパティー・ゲー・エム・ベー・ハー・ウント・コ・カーゲー | Hot water outlet pipe |
| JP4787244B2 (en) * | 2004-06-04 | 2011-10-05 | リフラクトリー・インテレクチュアル・プロパティー・ゲー・エム・ベー・ハー・ウント・コ・カーゲー | Hot water outlet pipe |
| WO2006011269A1 (en) * | 2004-07-29 | 2006-02-02 | Krosakiharima Corporation | Discharging hole for molten metal in molten metal container, method of operating converter with the discharging hole, and sleeve exchanging device at discharging hole of molten metal container |
| JP2006037202A (en) * | 2004-07-29 | 2006-02-09 | Kurosaki Harima Corp | Molten metal container outlet structure and sleeve exchange device for molten metal container outlet |
| KR100830227B1 (en) * | 2004-07-29 | 2008-05-16 | 구로사키 하리마 코포레이션 | Discharging hole for molten metal in molten metal container, method of operating converter with the discharging hole, and sleeve exchanging device at discharging hole of molten metal container |
| CN100507015C (en) | 2004-07-29 | 2009-07-01 | 黑崎播磨株式会社 | Molten metal discharge port in molten metal container and sleeve replacement device for molten metal discharge port |
| JP2010047795A (en) * | 2008-08-20 | 2010-03-04 | Sumitomo Metal Ind Ltd | Sleeve for tapping hole of converter and method for producing hot metal |
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