JP2003033848A - Submerged nozzle for continuous casting - Google Patents
Submerged nozzle for continuous castingInfo
- Publication number
- JP2003033848A JP2003033848A JP2001217863A JP2001217863A JP2003033848A JP 2003033848 A JP2003033848 A JP 2003033848A JP 2001217863 A JP2001217863 A JP 2001217863A JP 2001217863 A JP2001217863 A JP 2001217863A JP 2003033848 A JP2003033848 A JP 2003033848A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- molten metal
- swirl
- swirl vane
- continuous casting
- 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.)
- Granted
Links
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Continuous Casting (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ノズル内部に溶湯
に旋回を付与するための螺旋状旋廻羽根を設けた連続鋳
造用浸漬ノズルにおいて、前記旋廻羽根にアルミナ等の
付着を防止して寿命の延長を図ることができる連続鋳造
用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 a continuous casting immersion nozzle having a spiral swirl vane for imparting swirl to the molten metal inside the nozzle so as to prevent adhesion of alumina or the like to the swirl vane and improve life. The present invention relates to a continuous casting immersion nozzle that can be extended.
【０００２】[0002]
【従来の技術】従来から、鋼を連続鋳造するに当り、溶
湯をタンディッシュから鋳型へ注入するのに用いる連続
鋳造用浸漬ノズルとして、ノズル本体の内部に、溶湯に
旋回流を付与するための螺旋状旋廻羽根を設けたものが
知られている（例えば、特開平9-275032号公報や特開20
00-237852号公報参照）。このような旋廻羽根を設けた
ノズルは、スライディングノズル周辺からの空気の侵入
を防止することができ、またモールド内溶鋼流動を適正
に制御することができる等の優れた効果を奏するもので
ある。2. Description of the Related Art Conventionally, as a continuous casting immersion nozzle used for pouring molten metal from a tundish into a mold during continuous casting of steel, it is used to impart a swirling flow to the molten metal inside the nozzle body. There is known one provided with a spiral swirl vane (for example, JP-A-9-275032 and JP-A-20-275032).
(See Japanese Patent Publication No. 00-237852). The nozzle provided with such swirl vanes has excellent effects such as preventing air from entering around the sliding nozzle and appropriately controlling the molten steel flow in the mold.
【０００３】しかしながら、このような旋廻羽根付きの
連続鋳造用浸漬ノズルにおいては、この旋回羽根の表面
部に溶湯中のアルミナを主体とする非金属介在物が付着
して流路を閉塞する現象を生じ、ノズルの寿命を大きく
低下させるという問題点があった。However, in such a continuous casting dip nozzle with swirl vanes, there is a phenomenon that non-metallic inclusions mainly composed of alumina in the molten metal adhere to the surface of the swirl vanes to block the flow path. However, there is a problem in that the life of the nozzle is greatly reduced.
【０００４】[0004]
【発明が解決しようとする課題】本発明は上記のような
従来の問題点を解決して、ノズル内部を流下する溶湯に
旋回流を付与することができるとともに、ノズル内部に
設けた旋廻羽根に溶湯中の非金属介在物が付着するのを
防止して、羽根のない浸漬ノズルと同等の寿命を確保す
ることができ、またノズルからの溶湯の吐出流も偏流に
なることを防止することができる連続鋳造用浸漬ノズル
を提供することを目的として完成されたものである。SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art and is capable of imparting a swirl flow to the molten metal flowing down the inside of the nozzle, and the swirl vanes provided inside the nozzle. It is possible to prevent non-metallic inclusions in the molten metal from adhering to ensure a life equivalent to that of a bladeless immersion nozzle, and to prevent the molten metal discharge flow from the nozzle from becoming uneven. The present invention has been completed for the purpose of providing a dipping nozzle for continuous casting.
【０００５】[0005]
【課題を解決するための手段】上記の課題を解決するた
めになされた本発明の連続鋳造用浸漬ノズルは、ノズル
本体の内部に、溶湯に旋回流を付与するための螺旋状旋
廻羽根を設けた連続鋳造用浸漬ノズルにおいて、前記旋
回羽根の旋回角度θo[°]と溶湯注入方向に対する旋回
羽根の長さL1[mm]の関係をθo／L1≦0.7を満足するもの
としたことを特徴とするものである。The immersion nozzle for continuous casting of the present invention, which has been made to solve the above-mentioned problems, is provided with a spiral swirl vane for imparting a swirl flow to the molten metal inside the nozzle body. In the continuous casting immersion nozzle, the relationship between the swirl angle θ o [°] of the swirl vane and the length L 1 [mm] of the swirl vane with respect to the molten metal injection direction should satisfy θ o / L 1 ≦ 0.7. It is characterized by that.
【０００６】また旋回羽根の設置位置が、次式を満たす
ものを請求項２に係る発明とする。The invention according to claim 2 is such that the installation position of the swirl vanes satisfies the following equation.
【数２】
Do：ノズル本体の内径[mm]
Lo：浸漬ノズル上端もしくはノズル本体上部にあるスラ
イディングノズル下端から、旋回羽根上端までの距離[m
m]
L1：旋回羽根の長さ[mm]
L2：ノズル本体上端から吐出孔上端までの距離[mm]
θ1：旋回羽根を通過した溶湯の流れがノズル本体の鉛
直線となす角度[°]
また、注入方向に対する旋回羽根の断面積Anを、ノズル
内断面積Aoに対し１５％以下（An／Ao≦0.15）としたも
のを請求項３に係る発明とし、また、溶湯注入量の制御
が浸漬ノズル上部のスライディングノズルにより行わ
れ、かつノズル内の溶湯流路が旋廻羽根により２分割さ
れる場合において、旋廻羽根の上端部が示す方向とスラ
イディングノズルの摺動方向とが作る角度θ2を３０°
以下としたものを請求項４に係る発明とする。更に、旋
廻羽根が鋳型内の溶湯の湯面よりも上部に位置している
ものを請求項５に係る発明とする。[Equation 2] D o : Inner diameter of the nozzle body [mm] L o : Distance from the top of the immersion nozzle or the bottom of the sliding nozzle at the top of the nozzle to the top of the swirl blade [m
m] L 1 : Length of swirl vane [mm] L 2 : Distance from upper end of nozzle body to upper end of discharge hole [mm] θ 1 : Angle between molten metal flow passing through swirl vane and vertical line of nozzle body [ °] The cross-sectional area A n of the swirl vane with respect to the injection direction is set to 15% or less (An / Ao ≤ 0.15) with respect to the cross-sectional area A o in the nozzle as the invention according to claim 3, and the molten metal injection When the amount of the liquid is controlled by the sliding nozzle above the immersion nozzle and the molten metal flow path inside the nozzle is divided into two by the rotating blade, the direction indicated by the upper end of the rotating blade and the sliding direction of the sliding nozzle are created. Angle θ 2 is 30 °
The following is defined as the invention according to claim 4. Further, the invention according to claim 5 is one in which the swirl vane is located above the surface of the molten metal in the mold.
【０００７】[0007]
【発明の実施の形態】以下に、図面を参照しつつ本発明
の好ましい実施の形態を示す。図１において、１は円筒
状のノズル本体、２は該ノズル本体１の下方部に設けら
れた吐出孔、３はスライディングノズルであり、上部に
あるタンディッシュからスライディングノズル３および
ノズル本体１を通じて溶湯を下部にある鋳型へ注入する
点は従来と同様である。また、前記ノズル本体１の内部
には溶湯に旋回流を付与するための螺旋状旋廻羽根４が
設けらており、該旋廻羽根４によってノズル本体を流下
する溶湯に自然に旋回流を付与して、周辺からの空気の
侵入を防止し、またモールド内溶鋼流動を適正に制御し
ている。BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a cylindrical nozzle body, 2 is a discharge hole provided in the lower portion of the nozzle body 1, 3 is a sliding nozzle, and the molten metal is passed from the upper tundish through the sliding nozzle 3 and the nozzle body 1. Is the same as the conventional one in that it is injected into the lower mold. Further, a spiral swirl vane 4 is provided inside the nozzle body 1 for imparting a swirl flow to the molten metal, and the swirl vane 4 naturally imparts a swirl flow to the molten metal flowing down the nozzle body. In addition, it prevents the invasion of air from the surroundings and controls the flow of molten steel in the mold properly.
【０００８】そして本発明では、溶湯の注入流が旋回羽
根４に衝突もしくは通過する時の動圧が高い場合には、
羽根部での流動の乱流度が増加し、旋回羽根４の表面部
に溶湯中のアルミナを主体とする非金属介在物が付着し
やすい状況になるとの知見に基づき、以下のとおり形状
等を規制することで非金属介在物の付着発生を防止する
ものである。In the present invention, when the pouring flow of the molten metal impinges on or passes through the swirl vanes 4 when the dynamic pressure is high,
Based on the finding that the degree of turbulence of the flow at the blades increases and non-metallic inclusions mainly composed of alumina in the molten metal are likely to adhere to the surface of the swirl blades 4, The regulation prevents the adhesion of non-metallic inclusions.
【０００９】前記旋回羽根の旋回角度θo[°]と溶湯注
入方向に対する旋回羽根の長さL1[mm]の関係をθo／L1
≦0.7を満足するものとする。ここでL1[mm]は、図２に
示されるように、旋回羽根の長さであり、旋回角度θ
o[°]は、図３に示されるように、旋回羽根の旋回角度
である。そして本発明者は、図６に示すように、θo／L
1が大きいほどこの動圧が大きくなる傾向があることを
見出し、非金属介在物の付着発生を防止するにはθo／L
1が小さいことが好ましく、０．７以下とするのが有効
であることを見出した。Swing angle θ of the swirl vaneso[°] and molten metal pouring
Swirl vane length L relative to the entry direction1The relationship of [mm] is θo/ L1
Satisfies ≦ 0.7. Where L1[mm] is shown in Figure 2.
As shown, the swirl vane length and swivel angle θ
o[°] is the swirl angle of the swirl vane, as shown in FIG.
Is. Then, the inventor, as shown in FIG.o/ L
1Is larger, this dynamic pressure tends to increase.
Heading, θ to prevent adhesion of non-metallic inclusionso/ L
1Is preferably small, and 0.7 or less is effective
I found that.
【００１０】また前記旋回羽根の設置位置が、次式を満
たすものとする。Further, the installation position of the swirl vane satisfies the following equation.
【数３】
Do：ノズル本体の内径[mm]
Lo：浸漬ノズル上端もしくはノズル本体上部にあるスラ
イディングノズル下端から、旋回羽根上端までの距離[m
m]
L1：旋回羽根の長さ[mm]
L2：ノズル本体上端から吐出孔上端までの距離[mm]
θ1：旋回羽根を通過した溶湯の流れがノズル本体の鉛
直線となす角度[°]
Ｌ0が小さいほどスライディングノズルやストッパーに
より流路断面が絞られた乱流度の大きい溶湯が羽根部に
衝突するため、この動圧は大きくなる傾向にあるとの知
見のもと、本発明者はLo/Doが１．５以上の範囲では動
圧が良好であることを確認した（図７参照）。また、旋
回羽根４によって形成した溶湯の旋回流れが吐出孔２に
直接流入する条件であると、吐出孔２からの溶湯流れが
偏流と呼ばれる不均一な状態（２孔の場合には、２つの
孔からの流量がことなる現象）となってしまう。そし
て、本発明者は種々実験した結果、この偏流を防止する
には、図８に示されるよう、Lo≦L2−Do／（２・tan
θ1）−L1の条件を満たせば回避できることを見出し
た。なお、θ1[°]は図４に示されるように、旋回羽根
を通過した溶湯の流れの向きと鉛直方向が作る角度であ
る。[Equation 3] D o : Inner diameter of the nozzle body [mm] L o : Distance from the top of the immersion nozzle or the bottom of the sliding nozzle at the top of the nozzle to the top of the swirl blade [m
m] L 1 : Length of swirl vane [mm] L 2 : Distance from upper end of nozzle body to upper end of discharge hole [mm] θ 1 : Angle between molten metal flow passing through swirl vane and vertical line of nozzle body [ °] As the L 0 becomes smaller, molten metal with a larger turbulence whose flow passage cross section is narrowed by the sliding nozzle and stopper collides with the blades, and this dynamic pressure tends to increase. The inventor confirmed that the dynamic pressure was good in the range of Lo / Do of 1.5 or more (see FIG. 7). Further, under the condition that the swirling flow of the molten metal formed by the swirl vanes 4 directly flows into the discharge hole 2, the molten metal flow from the discharge hole 2 is in a non-uniform state called uneven flow (in the case of two holes, two The flow rate from the hole will be a different phenomenon). As a result of various experiments conducted by the present inventor, in order to prevent this drift, as shown in FIG. 8, L o ≦ L 2 −D o / (2 · tan
It was found that it can be avoided by satisfying the condition of θ 1 ) −L 1 . It should be noted that θ 1 [°] is an angle formed by the vertical direction and the direction of the flow of the molten metal that has passed through the swirl vanes, as shown in FIG.
【００１１】また、注入方向に対する旋回羽根の断面積
Anを、ノズル内断面積Aoに対し１５％以下（An／Ao≦0.
15）とする。これは、An/Aoを小さくしていけば羽部部
の動圧が小さくなるとの知見に基づき実験した結果、図
９に示されるように、Ao/An≦０．１５とすることで、
羽根部における動圧の増加は問題ないことを見出した。
なお、Ao／Anは旋廻羽根４の強度が問題なく確保できる
範囲であればいくら小さくても構わない。The cross-sectional area of the swirl vane with respect to the injection direction
A n is 15% or less with respect to the nozzle cross-sectional area A o (An / A o ≤ 0.
15) As a result of an experiment based on the knowledge that the dynamic pressure of the wing part becomes smaller as An / Ao becomes smaller, as shown in FIG. 9, by setting Ao / An ≦ 0.15,
It was found that there is no problem in increasing the dynamic pressure in the blade.
It should be noted that Ao / An may be as small as possible as long as the strength of the rotating blade 4 can be ensured without any problem.
【００１２】また、溶湯注入量の制御がノズル本体１の
上部にあるスライディングノズル３により行われ、かつ
ノズル内の溶湯流路が旋廻羽根４により２分割される場
合において、旋廻羽根４の上端部が示す方向とスライデ
ィングノズル３の摺動方向とが作る角度θ2を３０°以
下とする。図５に示されるように、スライディングノズ
ル（SN）３により溶湯の注入量を制御する場合には、SN
の摺動方向と旋廻羽根上端の背（注入流を２分する境界
線）の角度θ2が０°、即ち平行であれば旋廻羽根４に
よって２分される溶湯の量が等しくなり理想的である。
一方、θ2が大きくなるにしたがって、２分される溶湯
の片側の量が大きくなり、大きい側の動圧が高くなるこ
ととなる。このため、溶湯の量が大きい側には非金属介
在物の付着現象を発生させるという問題が生じる。そこ
で本発明者は種々実験した結果、図１０に示されるよう
に、θ2が３０°を超えるとこの影響が急激に増加する
ことを確認し、θ2の許容できる範囲を最大30°までと
した。Further, when the amount of molten metal injected is controlled by the sliding nozzle 3 located above the nozzle body 1 and the molten metal flow passage in the nozzle is divided into two by the swirling vane 4, the upper end portion of the swirling vane 4 is divided. The angle θ 2 formed by the direction indicated by and the sliding direction of the sliding nozzle 3 is set to 30 ° or less. As shown in FIG. 5, when controlling the injection amount of the molten metal by the sliding nozzle (SN) 3,
If the angle θ 2 between the sliding direction of the rotating blade and the spine of the upper end of the rotating blade (the boundary line that divides the injection flow) is 0 °, that is, if the angle is parallel, the amount of the molten metal divided by the rotating blade 4 is equal, which is ideal. is there.
On the other hand, as θ 2 increases, the amount of the molten metal divided into two parts on one side increases, and the dynamic pressure on the large side increases. Therefore, there is a problem that a non-metallic inclusion adheres to the side where the amount of molten metal is large. The present inventors have result of various experiments, as shown in FIG. 10, the theta 2 exceeds 30 ° this effect sure that rapidly increases, and the allowable range of the theta 2 up to 30 ° did.
【００１３】更には、前記旋廻羽根４が鋳型内の溶湯の
湯面よりも上部に位置しているものとする。これは、旋
廻羽根４を鋳型内の溶湯の湯面よりも低い位置に設置し
た場合は、旋廻羽根４の部位における溶湯流の乱流度合
いが大きくなり、非金属介在物の付着が発生しやすくな
るからである。Furthermore, it is assumed that the swirl vane 4 is located above the surface of the molten metal in the mold. This is because when the swirl vane 4 is installed at a position lower than the level of the molten metal in the mold, the degree of turbulence of the molten metal flow at the swirl vane 4 is large and non-metallic inclusions tend to adhere. Because it will be.
【００１４】[0014]
【実施例】低炭素アルミキルド鋼を鋳造し、ノズル本体
の内部に溶湯に旋回流を付与するための螺旋状旋廻羽根
を設けた連続鋳造用浸漬ノズルを用いて、溶湯をタンデ
ィッシュから鋳型へ注入した。溶湯を３００ｔｏｎ注入
した後における旋廻羽根表面部への介在物付着による閉
塞状況を確認し、最も付着の大きかった位置の付着面積
率を流路断面積に対して算出・評価した結果を表１に示
す。表１からも明らかなように、本発明においては旋廻
羽根への介在物付着が十分に抑制できていることが確認
できた。[Example] Casting low carbon aluminum killed steel, and pouring molten metal from a tundish into a mold using a continuous casting immersion nozzle provided with a spiral swirl blade for imparting a swirling flow to the molten metal inside the nozzle body. did. Table 1 shows the results of calculation and evaluation of the adhesion area ratio at the position of the largest adhesion with respect to the flow passage cross-sectional area, after confirming the clogging situation due to the adhesion of inclusions to the surface of the rotating blade after pouring 300 tons of molten metal Show. As is clear from Table 1, in the present invention, it was confirmed that the adhesion of inclusions to the rotating blade was sufficiently suppressed.
【００１５】[0015]
【表１】 [Table 1]
【００１６】[0016]
【発明の効果】以上の説明からも明らかなように、本発
明はノズル内部を流下する溶湯に旋回流を付与すること
ができるとともに、ノズル内部に設けた旋廻羽根に溶湯
中の非金属介在物が付着するのを防止して、羽根のない
浸漬ノズルと同等の寿命を確保することができ、またノ
ズルからの溶湯の吐出流も偏流になることを防止するこ
とができるものである。よって、本発明は従来の問題点
を一掃した連続鋳造用浸漬ノズルとして、産業の発展に
寄与するところは極めて大である。As is apparent from the above description, the present invention is capable of imparting a swirl flow to the molten metal flowing down inside the nozzle, and the non-metallic inclusions in the molten metal are contained in the swirl vanes provided inside the nozzle. Can be prevented from adhering to the same life as a bladeless immersion nozzle, and the discharge flow of the molten metal from the nozzle can be prevented from becoming uneven. Therefore, the present invention has an extremely great contribution to industrial development as a continuous casting immersion nozzle that eliminates the conventional problems.
【図１】本発明の実施の形態を示す断面図である。FIG. 1 is a sectional view showing an embodiment of the present invention.
【図２】旋廻羽根を示す正面図である。FIG. 2 is a front view showing a rotating blade.
【図３】旋廻羽根を示す平面図である。FIG. 3 is a plan view showing a rotating blade.
【図４】旋回羽根を通過した溶湯の流れの向きと鉛直方
向が作る角度θ1[°]を示す説明図である。FIG. 4 is an explanatory view showing an angle θ 1 [°] formed by a vertical direction and a flow direction of a molten metal that has passed through a swirl blade.
【図５】旋廻羽根の上端部が示す方向とスライディング
ノズル（SN）の摺動方向とが作る角度θ2[°]を示す説
明図である。FIG. 5 is an explanatory diagram showing an angle θ 2 [°] formed by the direction indicated by the upper end of the rotating blade and the sliding direction of the sliding nozzle (SN).
【図６】旋回羽根部の動圧とθo／L1[°／mm]の関係を
示すグラフである。FIG. 6 is a graph showing the relationship between the dynamic pressure of the swirl vane portion and θ o / L 1 [° / mm].
【図７】旋回羽根部の動圧とLo／Ｄo[−]の関係を示す
グラフである。FIG. 7 is a graph showing the relationship between the dynamic pressure of the swirl vane portion and L o / D o [−].
【図８】偏流発生率と２・tanθ1・（L2−L1−Lo）／Do
[−]の関係を示すグラフである。[Fig. 8] Uneven flow rate and 2 · tan θ 1 · (L 2 −L 1 −L o ) / D o
It is a graph which shows the relationship of [-].
【図９】旋回羽根部の動圧とＡn／Ａo[−]の関係を示す
グラフである。FIG. 9 is a graph showing the relationship between the dynamic pressure of the swirl vane portion and A n / A o [-].
【図１０】旋回羽根部の動圧とθ2の関係を示すグラフ
である。FIG. 10 is a graph showing the relationship between the dynamic pressure of the orbiting blade and θ 2 .
１ ノズル本体 ２ 吐出孔 ３ スライディングノズル ４ 旋回羽根 1 nozzle body 2 discharge holes 3 sliding nozzles 4 swirl vanes
───────────────────────────────────────────────────── フロントページの続き (72)発明者 後藤 修 愛知県東海市東海町５−３ 新日本製鐵株 式会社名古屋製鐵所内 (72)発明者 坂本 康裕 愛知県東海市東海町５−３ 新日本製鐵株 式会社名古屋製鐵所内 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Osamu Goto 5-3 Tokai-cho, Tokai-shi, Aichi Nippon Steel Corporation Ceremony Company Nagoya Steel Works (72) Inventor Yasuhiro Sakamoto 5-3 Tokai-cho, Tokai-shi, Aichi Nippon Steel Corporation Ceremony Company Nagoya Steel Works
Claims (5)
与するための螺旋状旋廻羽根を設けた連続鋳造用浸漬ノ
ズルにおいて、前記旋回羽根の旋回角度θo[°]と溶湯
注入方向に対する旋回羽根の長さL1[mm]の関係をθo／L
1≦0.7を満足するものとしたことを特徴とする連続鋳造
用浸漬ノズル。1. An immersion nozzle for continuous casting, comprising a spiral swirl vane for imparting swirl flow to the molten metal inside the nozzle body, wherein the swirl angle θ o [°] of the swirl vane and the molten metal injection direction The relationship of the swirl vane length L 1 [mm] is θ o / L
An immersion nozzle for continuous casting, characterized by satisfying 1 ≤ 0.7.
のである請求項１に記載の連続鋳造用浸漬ノズル。 【数１】 Do：ノズル本体の内径[mm] Lo：浸漬ノズル上端もしくはノズル本体上部にあるスラ
イディングノズル下端から、旋回羽根上端までの距離[m
m] L1：旋回羽根の長さ[mm] L2：ノズル本体上端から吐出孔上端までの距離[mm] θ1：旋回羽根を通過した溶湯の流れがノズル本体の鉛
直線となす角度[°]2. The continuous casting immersion nozzle according to claim 1, wherein the installation position of the swirl vanes satisfies the following formula. [Equation 1] D o : Inner diameter of the nozzle body [mm] L o : Distance from the top of the immersion nozzle or the bottom of the sliding nozzle at the top of the nozzle to the top of the swirl blade [m
m] L 1 : Length of swirl vane [mm] L 2 : Distance from upper end of nozzle body to upper end of discharge hole [mm] θ 1 : Angle between molten metal flow passing through swirl vane and vertical line of nozzle body [ °]
nを、ノズル内断面積Aoに対し１５％以下（An／Ao≦0.1
5）とした請求項１または２に記載の連続鋳造用浸漬ノ
ズル。3. A cross sectional area A of the swirl vane with respect to the injection direction.
n is 15% or less with respect to the nozzle cross-sectional area A o (An / A o ≤ 0.1
5) The immersion nozzle for continuous casting according to claim 1 or 2.
部にあるスライディングノズルにより行われ、かつノズ
ル内の溶湯流路が旋廻羽根により２分割される場合にお
いて、旋廻羽根の上端部が示す方向とスライディングノ
ズルの摺動方向とが作る角度θ2を３０°以下とした請
求項１または２または３に記載の連続鋳造用浸漬ノズ
ル。4. The direction indicated by the upper end of the swirl vane when the amount of molten metal injected is controlled by a sliding nozzle at the upper part of the immersion nozzle main body and the molten metal flow passage in the nozzle is divided into two by the swirl vane. The immersion nozzle for continuous casting according to claim 1, 2 or 3, wherein an angle θ 2 formed between the sliding nozzle and the sliding direction of the sliding nozzle is 30 ° or less.
部に位置している請求項１または２または３または４に
記載の連続鋳造用浸漬ノズル。5. The immersion nozzle for continuous casting according to claim 1, 2 or 3 or 4, wherein the rotating blade is located above the surface of the molten metal in the mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001217863A JP4210444B2 (en) | 2001-07-18 | 2001-07-18 | Immersion nozzle for continuous casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001217863A JP4210444B2 (en) | 2001-07-18 | 2001-07-18 | Immersion nozzle for continuous casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003033848A true JP2003033848A (en) | 2003-02-04 |
| JP4210444B2 JP4210444B2 (en) | 2009-01-21 |
Family
ID=19052124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001217863A Expired - Fee Related JP4210444B2 (en) | 2001-07-18 | 2001-07-18 | Immersion nozzle for continuous casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4210444B2 (en) |
-
2001
- 2001-07-18 JP JP2001217863A patent/JP4210444B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP4210444B2 (en) | 2009-01-21 |
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