JPH0647154B2 - Pouring device in thin plate continuous casting equipment - Google Patents
Pouring device in thin plate continuous casting equipmentInfo
- Publication number
- JPH0647154B2 JPH0647154B2 JP28636087A JP28636087A JPH0647154B2 JP H0647154 B2 JPH0647154 B2 JP H0647154B2 JP 28636087 A JP28636087 A JP 28636087A JP 28636087 A JP28636087 A JP 28636087A JP H0647154 B2 JPH0647154 B2 JP H0647154B2
- Authority
- JP
- Japan
- Prior art keywords
- flow passage
- pouring
- molten steel
- continuous casting
- thin plate
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/064—Accessories therefor for supplying molten metal
- B22D11/0642—Nozzles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明はレードルやタンディッシュから薄板連続鋳造設
備の鋳型内に溶鋼を注湯する注湯装置に関する。Description: TECHNICAL FIELD The present invention relates to a pouring device for pouring molten steel from a ladle or a tundish into a mold of a thin plate continuous casting facility.
従来の技術 第８図に示すように、たとえばタンディッシュ21からタ
ンディッシュノズル22を介して鋳型23内に溶鋼24を注湯
する場合、均質な鋳片25を鋳造するために、鋳型23内の
湯面24aは常に一定レベルに保持する必要があり、その
ためタンディッシュノズル22からの注湯量は鋳片25の鋳
造量に等しく調節される。この注湯量を調節するものと
しては、従来からタンディッシュ21内に垂下された棒状
のストッパ26を昇降させることにより、ストッパ26の下
端部でタンディッシュノズル22の入口開口部22aの開度
を調節していた。2. Description of the Related Art As shown in FIG. 8, when pouring molten steel 24 into a mold 23 from a tundish 21 through a tundish nozzle 22, for example, in order to cast a homogeneous cast piece 25, It is necessary to keep the molten metal surface 24a at a constant level at all times, so that the pouring amount from the tundish nozzle 22 is adjusted to be equal to the casting amount of the slab 25. As a means for adjusting the pouring amount, by vertically moving a rod-shaped stopper 26 hanging in the tundish 21, the opening of the inlet opening 22a of the tundish nozzle 22 is adjusted at the lower end of the stopper 26. Was.
発明が解決しようとする問題点 ところが上記構成において、特に薄板連続鋳造の場合に
は鋳造量が少ないため、タンディッシュノズル22をスト
ッパ26により絞り込まねばならないときに、入口開口部
22aとストッパ26下端部の間隙が小さくなり、長時間に
わたる鋳造中に部分的にフロックにより閉塞しやすくな
る。その対策として、一時的にストッパ26を上昇してタ
ンディッシュノズル22を全開し、フロックを除去する
が、そのため鋳型23内の湯面レベル24aが上昇して鋳造
中の鋳片25に悪影響をあたえることになる。Problems to be Solved by the Invention However, in the above-mentioned configuration, since the casting amount is small particularly in the case of continuous casting of thin plates, when the tundish nozzle 22 must be narrowed down by the stopper 26, the inlet opening
The gap between the lower end 22a and the lower end of the stopper 26 becomes small, and it becomes easy for the flocs to partially close during casting for a long time. As a countermeasure, the stopper 26 is temporarily raised to fully open the tundish nozzle 22 to remove the flocs, but the molten metal surface level 24a in the mold 23 is raised to adversely affect the slab 25 during casting. It will be.
本発明は上記問題点を解決するもので、長時間の使用に
もノズルが閉塞することのない注湯装置を提供すること
を目的とする。The present invention solves the above problems, and an object of the present invention is to provide a pouring device in which the nozzle is not blocked even when used for a long time.
問題点を解決するための手段 上記問題点を解決するために本発明は、鋳型に溶鋼を注
湯する注湯ノズルを、上部垂直流路部と下部垂直流路部
とこれらにそれぞれ連結される中間部水平流路部とで構
成し、前記中間部水平流路部の周囲に、水平流路部内の
溶鋼に流送方向とは逆方向の力を与える磁界を発生する
電磁コイルを設けた構成としたものである。Means for Solving the Problems In order to solve the above problems, the present invention relates to a pouring nozzle for pouring molten steel into a mold, which is connected to an upper vertical flow path portion and a lower vertical flow path portion, respectively. A configuration in which an electromagnetic coil for generating a magnetic field that gives a force in the direction opposite to the flowing direction to the molten steel in the horizontal flow path portion is provided around the intermediate horizontal flow path portion. It is what
作用 上記構成において、電磁コイルにより回転磁界を発生さ
せ、その磁束が中間部水平流路中を通過する溶鋼にうず
電流を発生させ、磁束の方向とその電流の方向により溶
鋼の流送方向とは逆方向の力を発生させて溶鋼の流れを
阻害することにより、ストッパを使用することなく、注
湯ノズルの注湯量を最適に調整することが可能となる。In the above-mentioned configuration, a rotating magnetic field is generated by the electromagnetic coil, and its magnetic flux generates an eddy current in the molten steel passing through the intermediate horizontal flow passage, and the flowing direction of the molten steel depends on the direction of the magnetic flux and the direction of the current. By generating a force in the opposite direction to block the flow of molten steel, it is possible to optimally adjust the pouring amount of the pouring nozzle without using a stopper.
実施例 以下本発明の一実施例を第１図〜第７図に基づいて説明
する。Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 7.
第１図〜第４図において、１はタンディッシュ２から、
一対のモールドロール３と溶鋼受４とを備えた鋳型５内
に溶鋼10を注湯する注湯ノズルで、この注湯ノズル１は
耐火材で形成され、上端部がタンディッシュ２に接続さ
れた上部垂直流路部６と、下端部が溶鋼受４内に至る下
部垂直流路部７と、これら流路部６，７の中間部で、一
端が上部垂直流路部６の下端部に接続されるとともに他
端が下部垂直流路部７の上端部に接続された中間部水平
流路部８とから構成される。前記中間部水平流路部８
は、水平面上でほぼ360°にわたる円弧状を一周するよ
うに形成される。1 to 4, 1 is from the tundish 2,
A pouring nozzle for pouring molten steel 10 into a mold 5 having a pair of mold rolls 3 and a molten steel receiver 4. The pouring nozzle 1 was made of a refractory material, and the upper end was connected to the tundish 2. The upper vertical flow passage portion 6, the lower vertical flow passage portion 7 whose lower end portion reaches the molten steel receiver 4, and the intermediate portion between these flow passage portions 6 and 7, one end of which is connected to the lower end portion of the upper vertical flow passage portion 6. And the other end of the lower vertical flow path portion 7 is connected to the upper end portion of the lower vertical flow path portion 7. The intermediate horizontal flow path section 8
Is formed so as to go around a circular arc extending substantially 360 ° on a horizontal plane.
９は中間部水平流路部８の外周部に配設された電磁コイ
ルで、中間部水平流路８を横切る回転磁界を形成し、中
間部水平流路部８内の溶鋼10に渦電流を発生させ、中間
部水平流路部８の流れ方向とは逆方向の力を発生させる
ものであり、このことにより注湯ノズル１の注湯量を調
節可能である。Reference numeral 9 is an electromagnetic coil arranged on the outer peripheral portion of the intermediate horizontal flow passage portion 8 to form a rotating magnetic field across the intermediate horizontal flow passage portion 8 and generate an eddy current in the molten steel 10 in the intermediate horizontal flow passage portion 8. The force is generated to generate a force in the direction opposite to the flow direction of the intermediate horizontal flow path portion 8, and by this, the pouring amount of the pouring nozzle 1 can be adjusted.
この基本原理を第５図および第６図により説明する。This basic principle will be described with reference to FIGS. 5 and 6.
リング状の導体（溶鋼）11の外周部にＮ，Ｓ一対の磁石
12Ａ，12Ｂを矢印Ａ方向に回転すれば、導体11を横切る
磁束13により、導体11にうず電流による電流Ｉが発生
し、この電流Ｉが磁束13を下方に横切ると、フレミング
の左手の法則により、磁石12Ａ，12Ｂの回転方向である
矢印Ａ方向と同方向の力Ｆが発生し、導体11は磁石と同
一方向に回転されることになる。このような回転磁界は
誘導電動機と同じ原理で作ることができる。A pair of N and S magnets on the outer circumference of the ring-shaped conductor (molten steel) 11.
When 12A and 12B are rotated in the direction of arrow A, a magnetic flux 13 that crosses the conductor 11 generates a current I due to an eddy current in the conductor 11. When this current I crosses the magnetic flux 13 downward, according to Fleming's left-hand rule. A force F is generated in the same direction as the arrow A direction, which is the rotation direction of the magnets 12A and 12B, and the conductor 11 is rotated in the same direction as the magnets. Such a rotating magnetic field can be created by the same principle as an induction motor.
次に、本実施例において流体（溶鋼）の流れを停止させ
る原理について説明する。Next, the principle of stopping the flow of the fluid (molten steel) in this embodiment will be described.
第７図において、Ａ，Ｂ間での流体の持つエネルギーを
圧力水頭：Ｈ１のみであるとすると、この圧力水頭：Ｈ
１に等しいエネルギー：Ｈ２を生じさせるような速度：
υを、水平流路部８で生じさせるようにすればよい。In FIG. 7, assuming that the energy of the fluid between A and B is only the pressure head: H 1 , this pressure head: H
Energy equal to 1 : Velocity to give H 2 :
ν may be generated in the horizontal flow path portion 8.
すなわち、 Ｐ：流体の圧力、γ：流体の比重量 これを等しくおくと このような速度：υを発生させるための回転磁界を発生
させる周波数を求めてみると、以下のようになる。That is, P: fluid pressure, γ: specific weight of fluid If this is set equal The frequency for generating the rotating magnetic field for generating such velocity: υ is as follows.
ここで、回転磁界の回転数：Ｎ(rpm)、水平流路部の周
囲に配設される磁極数：Ｐ０、磁界発生のために加えら
れる周波数：Ｓ（Hz）との関係は、 である。Here, the relationship between the rotation speed of the rotating magnetic field: N (rpm), the number of magnetic poles arranged around the horizontal flow path portion: P 0 , and the frequency applied to generate the magnetic field: S (Hz), Is.
また、半径：ｒの水平流路部での速度：υと回転数：Ｎ
との関係は、 である。Also, the velocity in the horizontal flow path with radius: r: υ and the number of revolutions: N
Relationship with Is.
（１）のυ、（２）のＮとを（３）に代入すると、加え
るべき周波数Ｓが求められる。By substituting υ in (1) and N in (2) into (3), the frequency S to be added can be obtained.
ここで具体例を示す。 Here, a specific example will be shown.
流路の水頭：ｈ＝750mm、溶鋼の比重量：γ＝７×103kg
/m3、水平流路部半径：ｒ＝50mm、磁極数：Ｐ０＝６、
ｇ＝9.8ｍ／sec2とすると、 しかし、流体は実際に上記回転磁界と一緒に、すなわち
回転数：Ｎでは回転しない。したがって、実際に加える
べき周波数：Ｓは、上記の式で求められた値に効率（0.
01％〜10％の範囲）で除された値となる。Flow head: h = 750 mm, specific weight of molten steel: γ = 7 x 10 3 kg
/ m 3 , horizontal channel radius: r = 50 mm, number of magnetic poles: P 0 = 6,
If g = 9.8 m / sec 2 , However, the fluid does not actually rotate with the rotating magnetic field, i.e. at the number of rotations: N. Therefore, the frequency S to be actually added is equal to the efficiency (0.
The value is divided by 01% to 10%).
ここで効率を１％とすると、 となる。If the efficiency is 1%, Becomes
上記の効率はノズルの材質、溶鋼の材質、温度に関係
し、大きくは磁束に関係するコイルに流れる電流に影響
される。The above efficiency is related to the material of the nozzle, the material of the molten steel, and the temperature, and is largely influenced by the current flowing through the coil, which is related to the magnetic flux.
なお、上記実施例によれば、中間部水平流路部８をほぼ
360°にわたる円弧状としたが、60°を越える円弧状で
あればよく、また複数周にわたる流路でもよい。さら
に、これら中間部水平流路は円弧状でなくても、折曲る
直線による多角形状であってもよい。また、この水平流
路部８の断面を矩形状としたが、円形であってもよい。According to the above-mentioned embodiment, the middle horizontal flow path portion 8 is almost
Although the arc shape extends over 360 °, any arc shape over 60 ° may be used, and a flow path extending over a plurality of circumferences may be used. Further, these intermediate horizontal flow paths may not have an arc shape, but may have a polygonal shape formed by bending straight lines. Although the cross section of the horizontal flow path portion 8 is rectangular, it may be circular.
発明の効果 以上に述べたごとく本発明によれば、電磁コイルに流す
周波数と電流を調節することにより、注湯ノズルの注湯
量を調節できるので、従来のように摩耗による交換頻度
の高いストッパが不必要で、経済的である。また、流量
を絞る時に発生する逆流が溶鋼中のフロックや壁シェル
を再溶鋼できるので、注湯ノズルの閉塞が防止でき、安
定した流量調節を行える。さらに、閉塞や摩耗による流
量の変化を監視しながらストッパをコントロールする必
要がなくなり、きわめてコントロールが容易に行える。Effects of the Invention As described above, according to the present invention, since the pouring amount of the pouring nozzle can be adjusted by adjusting the frequency and the current flowing in the electromagnetic coil, a stopper with a high replacement frequency due to wear as in the conventional case can be provided. Unnecessary and economical. Further, since the backflow generated when the flow rate is reduced can re-melt the flocs and wall shells in the molten steel, the pouring nozzle can be prevented from being blocked and the flow rate can be adjusted stably. Furthermore, it is not necessary to control the stopper while monitoring the change in the flow rate due to blockage or wear, and control is extremely easy.
第１図〜第７図は本発明の一実施例を示し、第１図は中
間部水平流路部を示す斜視図、第２図は注湯ノズルの全
体図、第３図は中間部水平流路部を示す側面断面図、第
４図は第３図に示すＩ−Ｉ矢視図、第５図および第６図
はそれぞれ基本原理を示す説明図、第７図は実施例の原
理を示す概略説明図、第８図は従来の注湯ノズルを示す
全体図である。 １……注湯ノズル、２……タンディッシュ、５……鋳
型、６……上部垂直流路部、７……下部垂直流路部、８
……中間部水平流路部、９……電磁コイル、10……溶
鋼。1 to 7 show an embodiment of the present invention, FIG. 1 is a perspective view showing a horizontal flow passage portion of an intermediate portion, FIG. 2 is an overall view of a pouring nozzle, and FIG. 3 is a horizontal portion of the intermediate portion. FIG. 4 is an explanatory view showing the basic principle of each of the flow path portions, FIG. 4 is a view taken along the line II of FIG. 3, FIG. 5 and FIG. FIG. 8 is a schematic view showing the conventional pouring nozzle. 1 ... Pouring nozzle, 2 ... Tundish, 5 ... Mold, 6 ... Upper vertical channel, 7 ... Lower vertical channel, 8
...... Middle horizontal flow path, 9 ...... electromagnetic coil, 10 ...... molten steel.
Claims (1)
垂直流路部と、下部垂直流路部とこれらにそれぞれ連結
される中間部水平流路部とで構成し、前記中間部水平流
路部の周囲に、水平流路部内の溶鋼に流送方向とは逆方
向の力を与える磁界を発生する電磁コイルを設けたこと
を特徴とする薄板連続鋳造設備における注湯装置。1. A pouring nozzle for pouring molten steel into a mold is constituted by an upper vertical flow passage portion, a lower vertical flow passage portion and an intermediate horizontal flow passage portion connected to each of the upper vertical flow passage portion, and the intermediate portion. A pouring device in a thin plate continuous casting facility, characterized in that an electromagnetic coil is provided around the horizontal flow passage to generate a magnetic field that gives a force to the molten steel in the horizontal flow passage in a direction opposite to the flow direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28636087A JPH0647154B2 (en) | 1987-11-12 | 1987-11-12 | Pouring device in thin plate continuous casting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28636087A JPH0647154B2 (en) | 1987-11-12 | 1987-11-12 | Pouring device in thin plate continuous casting equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01127149A JPH01127149A (en) | 1989-05-19 |
| JPH0647154B2 true JPH0647154B2 (en) | 1994-06-22 |
Family
ID=17703373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28636087A Expired - Lifetime JPH0647154B2 (en) | 1987-11-12 | 1987-11-12 | Pouring device in thin plate continuous casting equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0647154B2 (en) |
-
1987
- 1987-11-12 JP JP28636087A patent/JPH0647154B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01127149A (en) | 1989-05-19 |
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