JPS61154739A - Continuous casting machine for thin ingot - Google Patents
Continuous casting machine for thin ingotInfo
- Publication number
- JPS61154739A JPS61154739A JP27957784A JP27957784A JPS61154739A JP S61154739 A JPS61154739 A JP S61154739A JP 27957784 A JP27957784 A JP 27957784A JP 27957784 A JP27957784 A JP 27957784A JP S61154739 A JPS61154739 A JP S61154739A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- molten steel
- flow
- belts
- metal
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/62—Pouring-nozzles with stirring or vibrating means
-
- 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
- B22D11/0605—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two belts, e.g. Hazelett-process
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、薄鋳片連続鋳造機に関し、特に溶融金属（以
下は「溶鋼」の例でのべる）から厚さが５０ｍｍ以下に
もなる薄鋳片（シートバー等）を直接鋳造品として得る
１ベルトキヤスター”と呼ばれているもののうち、電磁
ブレーキつき浸漬ノズルを具える絞り込み式連続鋳造機
について提案する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a continuous thin slab casting machine, and particularly relates to a machine for continuously casting thin slabs, and particularly for casting thin slabs from molten metal (hereinafter referred to as "molten steel") into thin slabs with a thickness of 50 mm or less. Among the so-called "one-belt casters" that directly produce slabs (sheet bars, etc.) as cast products, we propose a narrowing type continuous casting machine equipped with an immersion nozzle with an electromagnetic brake.
（従来の技術）
溶鋼からシートバーの如き鋼鋳片を直接連続鋳造するベ
ルトキャスターとしては種々のものがあるが、第２図示
例はその代表的なものである。このベルトキャスターは
、一部の領域にわたって溶鋼や凝固シェル等の鋳造材料
を保持するための間隔を維持しつつ、それぞれ複数個の
ガイドローラを介して向い合わせに対設した輪回移動す
る一対の長辺面を指示する金属ベルトと、それら金属ヘ
ルド相互間にあって各々の側縁近傍で緊密に接している
短辺面を指示する略逆三角形の側板とで４方を限局して
先細り状鋳造空間とし、この鋳造空間にはタンディツシ
ュからのびる浸漬ノズル下部が挿入しである。(Prior Art) There are various types of belt casters for directly and continuously casting steel slabs such as sheet bars from molten steel, and the second illustrated example is a typical one. This belt caster consists of a pair of long belt casters that move in opposite directions through a plurality of guide rollers, while maintaining a spacing to hold casting materials such as molten steel or solidified shells over a certain area. A tapered casting space is formed by confining the metal belt on four sides and defining the short side surfaces between the metal healds and in close contact with each other near the side edges. The lower part of the immersion nozzle extending from the tundish is inserted into this casting space.
（発明が解決しようとする問題点）
上記従来ベルトキャスターは、浸漬ノズルから鋳造空間
内に吐出する溶鋼流により、金属ベルトが溶損し寿命が
短いという欠点があった。これは高温が溶鋼がノズル吐
出口を通じて吐出するとき金属ベルトを直撃するその運
動エネルギーに起因するものであると考えられている。(Problems to be Solved by the Invention) The above-mentioned conventional belt caster has the drawback that the metal belt is melted and damaged by the flow of molten steel discharged from the immersion nozzle into the casting space, resulting in a short life span. This is believed to be due to the kinetic energy of the high temperature that directly hits the metal belt when the molten steel is discharged through the nozzle outlet.
特にこの現象は、鋳込みの開始に当って溶鋼面が浸漬ノ
ズルの吐出口上位レベルに達していないときに激しく、
その後についてはほとんど起らない。従って、溶鋼直撃
流による運動エネルギーの影響であって、溶鋼顕熱に伴
う熱エネルギーでないことがわかる。This phenomenon is particularly severe when the molten steel surface has not reached the upper level of the discharge port of the immersion nozzle at the start of pouring.
Not much happens after that. Therefore, it can be seen that the effect is due to the kinetic energy due to the direct flow of the molten steel, and not the thermal energy associated with the sensible heat of the molten steel.
以上の説明で明らかなように金属ベルトの溶損を防ぐに
は溶銅落下流を緩和する必要がある。As is clear from the above explanation, it is necessary to reduce the falling flow of molten copper in order to prevent melting damage to the metal belt.
（問題点を解決するための手段）
本発明は、上記問題点を解決するために、浸漬ノズル中
を流下する溶鋼流に対し、その運動エネルギーを野放し
にするのではなく抑制することにより、上記溶鋼直撃流
の力を減殺するようにした。(Means for Solving the Problems) In order to solve the above problems, the present invention suppresses the kinetic energy of the molten steel flow flowing down in the immersion nozzle, instead of leaving it unchecked. The power of the direct flow of molten steel was reduced.
そのために本発明は、一部の領域にわたって溶融金属お
よび鋳片を保持するための間隔を維持しつつ輪回移動す
る金属ベルトと、それら金属ベルト相互間にあってそれ
らと緊密に接している一対の側板とで先細り状の鋳造空
間を構成し、その鋳造空間内には上方より浸漬ノズルの
下部を挿入した構成によってなるものにおいて、前記浸
漬ノズルに該ノズル中流下する溶融金属流の流れを制動
する磁石を取付けたことを特徴とする薄鋳片連続鋳造機
を提案する。To this end, the present invention provides a metal belt that moves circularly while maintaining a gap for holding molten metal and slabs over a certain area, and a pair of side plates that are located between the metal belts and in close contact with them. A tapered casting space is formed, and a lower part of a submerged nozzle is inserted from above into the casting space, and a magnet is provided in the submerged nozzle to brake the flow of the molten metal flowing down through the nozzle. We propose a continuous casting machine for thin cast slabs, which is characterized by the following:
（作 用）
浸漬ノズルの外側から磁界を作用させると、磁界に垂直
な方向を導体（溶鋼流）が移動（落下）することになる
。ノズル内の静磁場に直交して、ノズル内溶鋼が速度を
もって侵入すればフレミングの右手の法則に従い、磁界
と溶鋼の運動に垂直の方向に起電力が生ずる。この起電
力に対して同じ方向に電流が発生しフレミングの左手の
法則に従って力が作用するる。この力が、溶鋼の動きに
対し逆の方向に作用するため、溶鋼流に対し制動力とな
り、その結果前記ベルトに悪影響を与える直撃流が緩和
されることになる。(Function) When a magnetic field is applied from outside the immersion nozzle, the conductor (molten steel flow) moves (falls) in a direction perpendicular to the magnetic field. If molten steel enters the nozzle with velocity perpendicular to the static magnetic field inside the nozzle, an electromotive force will be generated in the direction perpendicular to the magnetic field and the motion of the molten steel, according to Fleming's right-hand rule. A current is generated in the same direction as this electromotive force, and a force acts according to Fleming's left-hand rule. Since this force acts in the opposite direction to the movement of the molten steel, it acts as a braking force on the molten steel flow, and as a result, the direct impact flow that adversely affects the belt is alleviated.
（実施例）
第１図は、本発明の好適実施態様下にあるベルトキャス
ターであり、ｌはタンディツシュ、２゜２′は金属ベル
ト、３，３゛は冷却パッド、そして４が浸漬ノズルであ
る。この浸漬ノズル４には、ノズル半径方向を指向する
磁界を発生する電磁石５を配設し、溶鋼流に直交する向
きの磁界をかけることにより、溶鋼流とは逆向きの力を
作用させた。その結果、溶鋼吐出流がベルトを直撃して
溶損させるようなことが無くなり、安定した鋳造が′ｍ
続できた。(Example) FIG. 1 shows a belt caster according to a preferred embodiment of the present invention, where l is a tundish, 2°2' is a metal belt, 3,3' is a cooling pad, and 4 is a submerged nozzle. . This immersion nozzle 4 was provided with an electromagnet 5 that generated a magnetic field directed in the radial direction of the nozzle, and by applying a magnetic field perpendicular to the molten steel flow, a force in the opposite direction to the molten steel flow was applied. As a result, the molten steel discharge flow does not directly hit the belt and cause it to melt, resulting in stable casting.
I was able to continue.
なお、他の実施例によれば、タンディツシュ内溶鋼レベ
ルに応じて電磁石の磁界強度を変えれば常に望ましい電
磁ブレーキとなることがわかった。According to other examples, it has been found that a desirable electromagnetic brake can be obtained at all times by changing the magnetic field strength of the electromagnet depending on the level of molten steel in the tundish.
そこで、ノズル内径４０ｍｍ、溶鋼流速２ ｍ／ｓｅｃ
の通常鋳込みの場合と同一の溶鋼流量を確保しながら溶
鋼流量を減速させた。すなわち、内径５６ｍｍのノズル
を使用し、磁束密度１５００ガウス（ノズルセンター）
の磁石を作用させることにより溶鋼流速を１ ｍ／ｓｅ
ｃに減速することができた。そのため溶鋼の直撃による
ベルトの溶損が無くなった。Therefore, the nozzle inner diameter was 40 mm, and the molten steel flow rate was 2 m/sec.
The molten steel flow rate was reduced while maintaining the same molten steel flow rate as in the case of normal casting. That is, using a nozzle with an inner diameter of 56 mm, the magnetic flux density is 1500 Gauss (nozzle center).
The molten steel flow velocity is reduced to 1 m/sec by applying a magnet.
I was able to slow down to c. This eliminates belt erosion caused by direct impact from molten steel.
（発明の効果）
以上説明したように本発明によれば、浸漬ノズルからの
溶鋼吐出流を緩和できるので、たとえ鋳込み開始のとき
でも金属ベルト直撃流が減少し、該金属ベルトの溶損が
防止でき、その寿命を向上させるとともに安定した連鋳
作業ができた。(Effects of the Invention) As explained above, according to the present invention, the flow of molten steel discharged from the immersion nozzle can be relaxed, so even at the start of pouring, the flow directly hitting the metal belt is reduced, and the melting damage of the metal belt is prevented. This improved its lifespan and enabled stable continuous casting operations.
第１図は、本発明は薄鋳片連続鋳造機の路線図である。
１・・・タンディツシュ ２・・・金属ベルト３・・
・冷却パット ４・・・浸漬ノズル５・・・磁石FIG. 1 is a route diagram of a continuous thin slab casting machine according to the present invention. 1... Tanditshu 2... Metal belt 3...
・Cooling pad 4...Immersion nozzle 5...Magnet
Claims (1)
るための間隔を維持しつつ輪回移動する金属ベルトと、
それら金属ベルト相互間にあってそれらと緊密に接して
いる一対の側板とで先細り状の鋳造空間を構成し、その
鋳造空間内には上方より浸漬ノズルの下部を挿入した構
成によってなるものにおいて、前記浸漬ノズルに、該ノ
ズル中流下する溶融金属流の流れを制動する磁石を取付
けたことを特徴とする薄鋳片連続鋳造機。1. A metal belt that rotates while maintaining an interval for holding molten metal and slabs over a certain area;
A pair of side plates located between the metal belts and in close contact with the metal belts constitute a tapered casting space, and the lower part of the immersion nozzle is inserted from above into the casting space. 1. A continuous casting machine for thin slabs, characterized in that a magnet is attached to a nozzle to brake the flow of molten metal flowing down the middle of the nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27957784A JPS61154739A (en) | 1984-12-26 | 1984-12-26 | Continuous casting machine for thin ingot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27957784A JPS61154739A (en) | 1984-12-26 | 1984-12-26 | Continuous casting machine for thin ingot |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61154739A true JPS61154739A (en) | 1986-07-14 |
Family
ID=17612916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27957784A Pending JPS61154739A (en) | 1984-12-26 | 1984-12-26 | Continuous casting machine for thin ingot |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61154739A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5934358A (en) * | 1996-04-29 | 1999-08-10 | Ishikawajima-Harima Heavy Industries Company Limited | Magnetic braking |
| JP2001074376A (en) * | 1999-09-03 | 2001-03-23 | Shinko Electric Co Ltd | Melting furnace and method for controlling tap flow rate |
| JP2011529795A (en) * | 2008-08-07 | 2011-12-15 | ティーエムティー タッピング−メジャリング−テクノロジー ゲゼルシャフトミット ベシュレンクテル ハフツング | Method and apparatus for adjusting the flow rate of a melt flow and slowing down the melt flow by means of a magnetic field, for example in the extraction of metallurgical vessels such as blast furnaces and melting furnaces |
-
1984
- 1984-12-26 JP JP27957784A patent/JPS61154739A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5934358A (en) * | 1996-04-29 | 1999-08-10 | Ishikawajima-Harima Heavy Industries Company Limited | Magnetic braking |
| JP2001074376A (en) * | 1999-09-03 | 2001-03-23 | Shinko Electric Co Ltd | Melting furnace and method for controlling tap flow rate |
| JP2011529795A (en) * | 2008-08-07 | 2011-12-15 | ティーエムティー タッピング−メジャリング−テクノロジー ゲゼルシャフトミット ベシュレンクテル ハフツング | Method and apparatus for adjusting the flow rate of a melt flow and slowing down the melt flow by means of a magnetic field, for example in the extraction of metallurgical vessels such as blast furnaces and melting furnaces |
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