JPH10113753A - Rotary type immersion nozzle - Google Patents
Rotary type immersion nozzleInfo
- Publication number
- JPH10113753A JPH10113753A JP26845696A JP26845696A JPH10113753A JP H10113753 A JPH10113753 A JP H10113753A JP 26845696 A JP26845696 A JP 26845696A JP 26845696 A JP26845696 A JP 26845696A JP H10113753 A JPH10113753 A JP H10113753A
- Authority
- JP
- Japan
- Prior art keywords
- immersion nozzle
- end portion
- molten steel
- discharge port
- hole
- 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
- Continuous Casting (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、タンディッシュ内
の溶鋼を鋳型に注入する際に使用する浸漬ノズルに関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an immersion nozzle used for pouring molten steel in a tundish into a mold.
【０００２】[0002]
【従来の技術】タンディッシュ内の溶鋼を浸漬ノズルを
介して鋳型内に注入した場合、溶鋼は比較的静かに鋳型
内に注入されるので、液相部での流動が少なく、微小金
属酸化物の凝集が生じず、従ってその浮上もなく、溶鋼
中に介在物として残存したり、鋳片中心部にＰ，Ｓ等の
中心偏析が生じ易いという問題があった。2. Description of the Related Art When molten steel in a tundish is injected into a mold through an immersion nozzle, the molten steel is relatively quietly injected into the mold. Therefore, there is a problem in that no agglomeration occurs, and therefore, there is no floating, the steel remains as inclusions in the molten steel, and center segregation such as P and S easily occurs in the center of the slab.
【０００３】この問題を解決するために、例えば鋳型の
近傍に電磁攪拌装置を設置し、電磁力を利用して鋳型内
の溶鋼を攪拌し、溶鋼中の介在物の浮上を促進する方法
が採られているが、電磁攪拌装置は極めて高価である。
そこで、同様の効果を安価な装置で得ようとして、特開
昭６２−２７０２６０号で新たな浸漬ノズルが提案され
ている。In order to solve this problem, for example, a method has been adopted in which an electromagnetic stirrer is installed in the vicinity of the mold, and the molten steel in the mold is stirred using electromagnetic force to promote the floating of inclusions in the molten steel. However, the electromagnetic stirrer is very expensive.
Therefore, a new immersion nozzle has been proposed in Japanese Patent Application Laid-Open No. 62-270260 in order to obtain the same effect with an inexpensive apparatus.
【０００４】この浸漬ノズルは、図４に示すように、水
平方向の吐出口１ａの吐出方向をその中心からの放射方
向に対して周方向に角度を持たせて形成し、かつ、浸漬
ノズル１をタンディッシュ２に対してベアリング３を介
することで回転可能に軸支した構成である。As shown in FIG. 4, this immersion nozzle is formed so that the discharge direction of a horizontal discharge port 1a is circumferentially angled with respect to the radial direction from its center. Is rotatably supported on the tundish 2 via a bearing 3.
【０００５】[0005]
【発明が解決しようとする課題】この特開昭６２−２７
０２６０号で提案された浸漬ノズルは、浸漬ノズル全体
がタンディッシュに対して回転するような構成であるの
で、回転機構を浸漬ノズルの取り付け側（上端部側）に
配置する必要がある。しかしながら、浸漬ノズルの上端
部側には、実際上は、スライディングゲートが設けられ
ているので、さらに回転機構を設置することは、構成が
複雑になってメンテナンスが困難になるという問題があ
る。また、浸漬ノズル全体が回転するので、回転重量が
重たくなり、吐出口から流出する溶鋼の反力だけでは回
転が困難である。The problem to be solved by the invention is disclosed in Japanese Patent Application Laid-Open No. 62-27.
Since the immersion nozzle proposed in No. 0260 has a configuration in which the entire immersion nozzle rotates with respect to the tundish, it is necessary to dispose the rotation mechanism on the mounting side (upper end side) of the immersion nozzle. However, since a sliding gate is actually provided on the upper end side of the immersion nozzle, installing a rotation mechanism further has a problem that the configuration becomes complicated and maintenance becomes difficult. Further, since the entire immersion nozzle rotates, the rotating weight becomes heavy, and it is difficult to rotate only by the reaction force of the molten steel flowing out from the discharge port.
【０００６】本発明は、上記した従来の問題点に鑑みて
なされたものであり、簡単な構成で鋳型内の溶鋼を効果
的に攪拌でき、メンテナンスも容易な浸漬ノズルを提供
することを目的としている。The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide an immersion nozzle that can effectively stir molten steel in a mold with a simple configuration and that is easy to maintain. I have.
【０００７】[0007]
【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、本発明の回転式浸漬ノズルは、浸漬ノズルの吐
出口を含む下端部分を上部と別体に構成して、上部に対
して回転が自在なように取り付けると共に、吐出口は放
射方向に対して傾けて設けたこととしている。そして、
このようにすることで、吐出口から流出する溶鋼と、こ
の流出する溶鋼の反作用による下端部の回転によって溶
鋼が攪拌される。In order to achieve the above-mentioned object, a rotary immersion nozzle of the present invention has a lower end portion including a discharge port of the immersion nozzle formed separately from an upper portion, and is provided with It is mounted so that it can rotate freely, and the discharge port is provided to be inclined with respect to the radial direction. And
By doing so, the molten steel flowing out of the discharge port and the rotation of the lower end caused by the reaction of the molten steel flowing out are stirred by the molten steel.
【０００８】[0008]
【発明の実施の形態】本発明の回転式浸漬ノズルは、浸
漬ノズルの吐出口を含む下端部分を上部と別体に構成し
て、上部に対して回転が自在なように取り付けると共
に、吐出口は放射方向に対して傾けて設けているのであ
り、その際、下端部分の横断面形状を、長軸側の長さが
上部の円筒形横断面の外径と同じ長さのリング状長円形
に形成したり、下端部分における吐出口部の貫通孔面積
を上部の貫通孔面積の３０〜７０％とすることが好まし
い。BEST MODE FOR CARRYING OUT THE INVENTION The rotary dipping nozzle of the present invention has a lower end portion including a discharge port of the dipping nozzle formed separately from an upper portion, and is attached so as to be rotatable with respect to the upper portion. Is provided at an angle to the radial direction. At this time, the cross-sectional shape of the lower end portion is a ring-shaped oval whose length on the long axis side is the same as the outer diameter of the cylindrical cross-section at the top. It is preferable that the area of the through hole of the discharge port at the lower end is 30 to 70% of the area of the upper through hole.
【０００９】本発明の回転式浸漬ノズルでは、貫通孔内
を通って吐出口から鋳型内に流出する溶鋼流によって鋳
型内の溶鋼が攪拌されると共に、この流出する溶鋼の反
作用によって下端部分が回転し、鋳型内溶鋼を攪拌す
る。この時、下端部分の横断面形状を、長軸側の長さが
上部の円筒形横断面の外径と同じ長さのリング状長円形
に形成すれば、下端部分の回転によって鋳型内溶鋼の攪
拌が促進される。また、下端部分における吐出口部の貫
通孔面積が上部の貫通孔面積の３０〜７０％の範囲内で
あると、吐出口から流出する溶鋼によって、下端部分が
溶鋼内で良好に回転し、吐出口からの流出流とで、鋳型
内の溶鋼を効果的に攪拌できる。In the rotary dipping nozzle of the present invention, the molten steel in the mold is agitated by the molten steel flow flowing out of the discharge port into the mold through the through-hole, and the lower end is rotated by the reaction of the molten steel flowing out. Then, the molten steel in the mold is stirred. At this time, if the cross-sectional shape of the lower end portion is formed as a ring-shaped oval whose length on the long axis side is the same as the outer diameter of the upper cylindrical cross-section, the rotation of the lower end portion allows the molten steel in the mold to rotate. Agitation is promoted. Further, when the through hole area of the discharge port at the lower end portion is in the range of 30 to 70% of the area of the upper through hole, the lower end portion rotates well in the molten steel due to the molten steel flowing out of the discharge port, and the discharge is performed. With the outflow from the outlet, the molten steel in the mold can be effectively stirred.
【００１０】[0010]
【実施例】以下、本発明の回転式浸漬ノズルを図１〜図
３に示す一実施例に基づいて説明する。図１は本発明の
回転式浸漬ノズルの縦断面正面図、図２は同じく本発明
の回転式浸漬ノズルの縦断面側面図、図３は本発明の回
転式浸漬ノズルにおける吐出孔部の横断面図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS A rotary immersion nozzle according to the present invention will be described below with reference to an embodiment shown in FIGS. FIG. 1 is a longitudinal sectional front view of a rotary immersion nozzle of the present invention, FIG. 2 is a vertical sectional side view of the rotary immersion nozzle of the present invention, and FIG. 3 is a cross section of a discharge hole in the rotary immersion nozzle of the present invention. FIG.
【００１１】図１〜図３において、１１は例えばアルミ
ナ−グラファイト系のセラミックスで製作された本発明
の回転式浸漬ノズルであり、例えば水平面に対して上方
向きに設けられた吐出口１２ａを含む下端部分１２と上
部１３を別体に構成している。In FIG. 1 to FIG. 3, reference numeral 11 denotes a rotary immersion nozzle of the present invention made of, for example, alumina-graphite ceramics, for example, a lower end including a discharge port 12a provided upwardly with respect to a horizontal plane. The part 12 and the upper part 13 are formed separately.
【００１２】そして、例えば下端部分１２の上端には首
部１２ｂを介して嵌合円盤部１２ｃを形成すると共に、
上部１３の下端には、前記首部１２ｂに嵌合する内鍔１
３ａと、嵌合円盤部１２ｃを嵌入する凹部１３ｂを形成
している。従って、下端部分１２の上端と上部１３の下
端の前記嵌合をすきま嵌めと成すことで、下端部分１２
は上部１３に回転が自在なように保持されることにな
る。For example, a fitting disk portion 12c is formed at the upper end of the lower end portion 12 via a neck portion 12b.
At the lower end of the upper portion 13, an inner collar 1 fitted to the neck 12b is provided.
3a and a recess 13b into which the fitting disk portion 12c is fitted. Therefore, the lower end portion 12 is formed by a clearance fit between the upper end of the lower end portion 12 and the lower end of the upper portion 13.
Is rotatably held by the upper portion 13.
【００１３】加えて、本発明では前記下端部分１２に設
けた吐出口１２ａは放射方向に対して角度αだけ傾けて
設けている。従って、タンディッシュから鋳型に注入さ
れる溶鋼は、上部１３の貫通孔１３ｃから下端部分１２
の貫通孔１２ｄを通って吐出口１２ａから流出する際
に、その反作用によって下端部分１２を回転させる。こ
の時、本発明の回転式浸漬ノズル１１では下端部分１２
のみが回転するので、回転重量が小さく、溶鋼が吐出口
１２ａから流出する際の反作用だけで容易に回転する。
なお、吐出口１２ａから流出する溶鋼が放射方向にさえ
流出しなければ、下端部分１２は回転するので、前記角
度αは特に限定されるものではない。In addition, in the present invention, the discharge ports 12a provided in the lower end portion 12 are provided at an angle α to the radial direction. Therefore, the molten steel injected into the mold from the tundish flows from the through hole 13c of the upper part 13 to the lower end part 12c.
When flowing out of the discharge port 12a through the through hole 12d, the lower end portion 12 is rotated by the reaction. At this time, in the rotary immersion nozzle 11 of the present invention, the lower end portion 12
Since only the rotor rotates, the rotating weight is small, and the molten steel rotates easily only by the reaction when flowing out from the discharge port 12a.
If the molten steel flowing out of the discharge port 12a does not flow even in the radial direction, the lower end portion 12 rotates, and the angle α is not particularly limited.
【００１４】本実施例では、前記下端部分１２の横断面
形状を、長軸側の長さが上部１３の円筒形横断面の外径
と同じ長さのリング状長円形に形成したものを示してい
る。このようにすれば、下端部分１２の回転によって鋳
型内溶鋼の攪拌が促進されることになる。In this embodiment, the cross section of the lower end portion 12 is formed as a ring-shaped oval having a major axis length equal to the outer diameter of the cylindrical cross section of the upper portion 13. ing. In this way, the rotation of the lower end portion 12 promotes the stirring of the molten steel in the mold.
【００１５】また、本実施例では、下端部分１２におけ
る貫通孔１２ｄの面積を、上部から下部にゆくに従って
漸減させ、吐出口１２ａ部における貫通孔１２ｄの面積
が上部１３の貫通孔１３ｃの面積の例えば５０％とした
ものを示している。このようにすることで、吐出口１２
ａから流出する溶鋼の流速が大きくなって、流出時にお
ける鋳型内溶鋼の攪拌力が大きくなる。加えて、流出時
の反作用も大きくなって下端部分１２の回転数も増加
し、下端部分１２の回転による攪拌力も大きくなる。In this embodiment, the area of the through hole 12d in the lower end portion 12 is gradually reduced from the upper part to the lower part, and the area of the through hole 12d in the discharge port 12a is smaller than the area of the through hole 13c in the upper part 13. For example, 50% is shown. By doing so, the discharge port 12
The flow velocity of the molten steel flowing out of the a increases, and the stirring force of the molten steel in the mold at the time of the flow increases. In addition, the reaction at the time of outflow increases, the rotation speed of the lower end portion 12 increases, and the stirring force due to the rotation of the lower end portion 12 also increases.
【００１６】但し、本発明者の実験によれば、下端部分
１２における吐出口１２ａ部の貫通孔１２ｄの面積が上
部１３の貫通孔１３ｃの面積の３０％未満であると、吐
出口１２ａからの溶鋼の流出時における鋳型内溶鋼の攪
拌力の増加割合や、流出時の反作用の増大による下端部
分１２の回転数の増加割合が余り大きくなく、前記した
効果が期待できない。また、７０％を超えると、吐出口
１２ａからの溶鋼の流出速度が遅くなって攪拌能力が減
少し、結果として前記した効果が期待できない。従っ
て、下端部分１２における吐出口１２ａ部の貫通孔１２
ｄの面積は上部１３の貫通孔１３ｃの面積の３０〜７０
％の範囲内であることが好ましい。However, according to the experiment of the present inventor, if the area of the through hole 12d of the discharge port 12a in the lower end portion 12 is less than 30% of the area of the through hole 13c of the upper part 13, the discharge from the discharge port 12a The rate of increase in the stirring force of the molten steel in the mold when the molten steel flows out and the rate of increase in the rotational speed of the lower end portion 12 due to the increase in the reaction during the flow are not so large, and the above-described effects cannot be expected. On the other hand, if it exceeds 70%, the outflow speed of the molten steel from the discharge port 12a becomes slow, and the stirring ability is reduced. As a result, the above effects cannot be expected. Therefore, the through hole 12 of the discharge port 12a at the lower end portion 12
The area of d is 30 to 70 times the area of the through hole 13c in the upper part 13.
% Is preferable.
【００１７】なお、上記した本発明の回転式浸漬ノズル
１１を製造するに際しては、先ず、下端部分１２を鋳型
成形して製作した後、長手方向に半割り状に製作した上
部１３で前記下端部分１２を挟持し、上部１３の半割り
面を耐火物で接着して固定するか、溶鋼浸漬部より上方
の外表面をバンド固定すればよい。In manufacturing the rotary immersion nozzle 11 of the present invention, first, the lower end portion 12 is formed by molding a mold, and then the lower end portion 12 is formed in an upper portion 13 which is manufactured in a half-shape in the longitudinal direction. 12 may be sandwiched and the half surface of the upper portion 13 may be fixed by bonding with a refractory, or the outer surface above the molten steel immersion portion may be fixed by a band.
【００１８】[0018]
【発明の効果】以上説明したように、本発明の回転式浸
漬ノズルによれば、鋳型内の溶鋼を効果的に攪拌でき、
その結果、鋳片中の介在物やピンホールが減少する。ま
た、本発明の回転式浸漬ノズルによれば、構成が簡単で
あるのでメンテナンスも容易である。そして、下端部分
の横断面形状を、長軸側の長さが上部の円筒形横断面の
外径と同じ長さのリング状長円形に形成すれば、下端部
分の回転によって鋳型内溶鋼の攪拌がより促進される。
また、下端部分における吐出口部の貫通孔面積が上部の
貫通孔面積の３０〜７０％の範囲内にすると、吐出口か
ら流出する溶鋼によって、下端部分が溶鋼内で良好に回
転し、吐出口からの流出流とで、鋳型内の溶鋼をさらに
効果的に攪拌できる。As described above, according to the rotary immersion nozzle of the present invention, the molten steel in the mold can be effectively stirred,
As a result, inclusions and pinholes in the slab are reduced. Further, according to the rotary immersion nozzle of the present invention, since the configuration is simple, maintenance is also easy. Then, if the cross-sectional shape of the lower end portion is formed as a ring-shaped ellipse having the same major axis side length as the outer diameter of the upper cylindrical cross-section, the rotation of the lower end portion agitates the molten steel in the mold. Is promoted more.
Further, when the through hole area of the discharge port portion at the lower end portion is in the range of 30 to 70% of the area of the upper through hole, the lower end portion rotates well in the molten steel due to the molten steel flowing out of the discharge port, and And the effluent flow from the mold can more effectively agitate the molten steel in the mold.
【図１】本発明の回転式浸漬ノズルの縦断面正面図であ
る。FIG. 1 is a vertical sectional front view of a rotary immersion nozzle of the present invention.
【図２】本発明の回転式浸漬ノズルの縦断面側面図であ
る。FIG. 2 is a longitudinal sectional side view of the rotary immersion nozzle of the present invention.
【図３】本発明の回転式浸漬ノズルにおける吐出孔部の
横断面図である。FIG. 3 is a cross-sectional view of a discharge hole in the rotary dipping nozzle of the present invention.
【図４】（ａ）は特開昭６２−２７０２６０号で提案さ
れた浸漬ノズルを適用した連続鋳造装置の実施例を断面
して示す図、（ｂ）は（ａ）図におけるＢ−Ｂ断面図で
ある。4A is a cross-sectional view of an embodiment of a continuous casting apparatus to which an immersion nozzle proposed in Japanese Patent Application Laid-Open No. 62-270260 is applied, and FIG. 4B is a cross-sectional view taken along the line BB in FIG. FIG.
１１ 回転式浸漬ノズル １２ 下端部分 １２ａ 吐出口 １２ｄ 貫通孔 １３ 上部 １３ｃ 貫通孔 DESCRIPTION OF SYMBOLS 11 Rotary immersion nozzle 12 Lower end part 12a Discharge port 12d Through hole 13 Upper part 13c Through hole
Claims (3)
部と別体に構成して、上部に対して回転が自在なように
取り付けると共に、吐出口は放射方向に対して傾けて設
けたことを特徴とする回転式浸漬ノズル。1. A lower end portion including a discharge port of an immersion nozzle is formed separately from an upper portion, and is mounted so as to be rotatable with respect to the upper portion, and the discharge port is provided to be inclined with respect to a radial direction. A rotary immersion nozzle.
が上部の円筒形横断面の外径と同じ長さのリング状長円
形に形成したことを特徴とする請求項１記載の回転式浸
漬ノズル。2. A cross-sectional shape of the lower end portion is formed as a ring-shaped oval having a major axis side having the same length as the outer diameter of the upper cylindrical cross-section. Rotary dipping nozzle.
を上部の貫通孔面積の３０〜７０％としたことを特徴と
する請求項１又は２記載の回転式浸漬ノズル。3. The rotary immersion nozzle according to claim 1, wherein the area of the through hole at the lower end portion of the discharge port is 30 to 70% of the area of the upper through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26845696A JPH10113753A (en) | 1996-10-09 | 1996-10-09 | Rotary type immersion nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26845696A JPH10113753A (en) | 1996-10-09 | 1996-10-09 | Rotary type immersion nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10113753A true JPH10113753A (en) | 1998-05-06 |
Family
ID=17458766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26845696A Pending JPH10113753A (en) | 1996-10-09 | 1996-10-09 | Rotary type immersion nozzle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10113753A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1275452A2 (en) * | 2001-07-13 | 2003-01-15 | Heraeus Electro-Nite International N.V. | Refractory nozzle |
| KR100946659B1 (en) * | 2002-11-28 | 2010-03-10 | 주식회사 포스코 | Submerged entry nozzle for continuous casting |
| CN102218528A (en) * | 2011-06-03 | 2011-10-19 | 马鞍山钢铁股份有限公司 | Tundish water gap |
| WO2013161578A1 (en) | 2012-04-26 | 2013-10-31 | 品川リフラクトリーズ株式会社 | Submerged nozzle of continuous casting apparatus |
| WO2015136736A1 (en) * | 2014-03-13 | 2015-09-17 | 品川リフラクトリーズ株式会社 | Apparatus for slab continuous casting |
| CN108746578A (en) * | 2018-08-21 | 2018-11-06 | 北京利尔高温材料股份有限公司 | A kind of submersed nozzle of rotating jet |
-
1996
- 1996-10-09 JP JP26845696A patent/JPH10113753A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1275452A2 (en) * | 2001-07-13 | 2003-01-15 | Heraeus Electro-Nite International N.V. | Refractory nozzle |
| EP1275452A3 (en) * | 2001-07-13 | 2003-12-10 | Heraeus Electro-Nite International N.V. | Refractory nozzle |
| US7028868B2 (en) | 2001-07-13 | 2006-04-18 | Heraeus Electro-Nite International N.V. | Refractory nozzle |
| KR100946659B1 (en) * | 2002-11-28 | 2010-03-10 | 주식회사 포스코 | Submerged entry nozzle for continuous casting |
| CN102218528A (en) * | 2011-06-03 | 2011-10-19 | 马鞍山钢铁股份有限公司 | Tundish water gap |
| WO2013161578A1 (en) | 2012-04-26 | 2013-10-31 | 品川リフラクトリーズ株式会社 | Submerged nozzle of continuous casting apparatus |
| US9573189B2 (en) | 2012-04-26 | 2017-02-21 | Shinagawa Refractories Co., Ltd. | Submerged nozzle for continuous casting apparatus |
| WO2015136736A1 (en) * | 2014-03-13 | 2015-09-17 | 品川リフラクトリーズ株式会社 | Apparatus for slab continuous casting |
| CN108746578A (en) * | 2018-08-21 | 2018-11-06 | 北京利尔高温材料股份有限公司 | A kind of submersed nozzle of rotating jet |
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