JPH08243697A - Apparatus for continuously casting steel - Google Patents
Apparatus for continuously casting steelInfo
- Publication number
- JPH08243697A JPH08243697A JP6891495A JP6891495A JPH08243697A JP H08243697 A JPH08243697 A JP H08243697A JP 6891495 A JP6891495 A JP 6891495A JP 6891495 A JP6891495 A JP 6891495A JP H08243697 A JPH08243697 A JP H08243697A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- mold
- molten steel
- field generator
- field generating
- 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
- Continuous Casting (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、成分が異なる鋼種を連
続して鋳造する場合において、該異鋼種間の溶鋼成分混
合領域を最小限に抑えて歩留りの向上を図るための、静
止磁場発生装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the generation of a static magnetic field in order to improve the yield by minimizing the molten steel component mixing region between different steel types when continuously casting steel types having different components. It relates to the device.
【０００２】[0002]
【従来の技術】鋼の連続鋳造において、上記異鋼種を連
続して鋳造する際に、その鋼種間の継目は両鋼種の成分
混合領域と成らざるを得ず、このため、この成分混合領
域は鋳片段階で切断除去しなければならなく、その分、
歩留りが低下する。この成分混合領域を最小限に抑制し
て歩留り向上を図るため、例えば、特公平２−２０３４
９号公報で提案されているように、連続鋳造機へ磁場発
生装置を設置することが行われている。2. Description of the Related Art In continuous casting of steel, when continuously casting the different steel types, the seam between the steel types must be a component mixing region of both steel types. It has to be cut and removed at the slab stage,
Yield decreases. In order to suppress this component mixing region to the minimum and improve the yield, for example, Japanese Patent Publication No. 2-2034.
As proposed in Japanese Patent Publication No. 9, a magnetic field generator is installed in a continuous casting machine.
【０００３】これは、図４に示すように、静止磁場発生
装置１を鋳型２側壁の外側に配置して鋳型内に静止磁場
を形成する。この静止磁場内へ浸漬ノズル３から注入さ
れる溶鋼６の流れに対して、フレミングの左手の法則に
より制動をかけ、この流れの速度および運動量を減少さ
せてやり、小さい流れに分割して、前記浸漬ノズル３か
ら注入された溶鋼が、鋳型内の未凝固領域内に深く進入
することを阻止する方法がある。As shown in FIG. 4, the static magnetic field generator 1 is arranged outside the side wall of the mold 2 to form a static magnetic field in the mold. The flow of the molten steel 6 injected from the immersion nozzle 3 into the static magnetic field is damped by Fleming's left-hand rule, the velocity and momentum of the flow are reduced, and the flow is divided into small flows. There is a method of preventing the molten steel injected from the immersion nozzle 3 from deeply entering the unsolidified region in the mold.
【０００４】[0004]
【発明が解決しようとする課題】しかし、特公平２−２
０３４９号公報で提案の方法は、静止磁場発生装置１を
鋳型２に設置していることから、該静止磁場発生装置１
が鋳型２の上下動の振動に合わせて上下方向に振動す
る。このため、静止磁場発生装置１で形成された静止磁
場と、前記浸漬ノズル３から注入された溶鋼６の流れの
相対速度が変化する。すなわち、鋳型２が下方に振動し
たときは溶鋼流との相対速度が遅くなり、鋳型２が上方
に振動したときは溶鋼流との相対速度が早くなる。However, Japanese Patent Publication No. 2-2
In the method proposed in Japanese Patent No. 0349, since the static magnetic field generator 1 is installed in the mold 2, the static magnetic field generator 1
Vibrates vertically in accordance with the vibration of the vertical movement of the mold 2. Therefore, the relative velocity of the static magnetic field formed by the static magnetic field generator 1 and the flow of the molten steel 6 injected from the immersion nozzle 3 changes. That is, when the mold 2 vibrates downward, the relative velocity with the molten steel flow becomes slow, and when the mold 2 vibrates upward, the relative velocity with the molten steel flow becomes fast.
【０００５】特に、静止磁場と溶鋼流との相対速度が遅
くなると、前記フレミングの左手の法則により、溶鋼流
に発生する制動力は小さくなり、浸漬ノズル３から注入
された溶鋼６の流れが、鋳型２内の未凝固領域内に深く
進入することから、成分混合領域が広がり、歩留り低減
効果が減少する。また、鋳型２は４００時間程度鋳造す
ると、溶鋼により摩耗してくるため交換する必要が生じ
る。従って、この交換の都度、静止磁場発生装置１は交
換する鋳型２からの取外し、新しくセットされる鋳型２
に取付けなければならず、メンテナンス性が煩雑なもの
であった。Particularly, when the relative velocity between the static magnetic field and the molten steel flow becomes slow, the braking force generated in the molten steel flow becomes small due to Fleming's left-hand rule, and the flow of the molten steel 6 injected from the immersion nozzle 3 becomes Since it deeply penetrates into the unsolidified region in the mold 2, the component mixing region is expanded and the yield reduction effect is reduced. If the mold 2 is cast for about 400 hours, it will be abraded by molten steel and will need to be replaced. Therefore, every time this exchange is performed, the static magnetic field generator 1 is removed from the exchanged mold 2, and the newly set mold 2 is removed.
It had to be attached to the, and the maintainability was complicated.
【０００６】さらに、静止磁場発生装置１は鉄芯として
鉄の塊で外形を構成し、この鉄芯の外周に銅線を巻き、
この銅線に電流を流す構造をしているために、重量が非
常に大きく、鋳型２に設置されている鋳型振動装置に作
用する負荷荷重が大きくなる。そのため、この鋳型振動
装置を大容量とする必要があり、設備費とランニングコ
ストが上昇する等の問題を有するものであった。本発明
は上記問題を有することなく、常に、溶鋼流に対し安定
した制動力を発揮し、溶鋼の成分混合領域を最小限とす
ると共にメンテナンス性が良く、しかも、鋳型振動装置
にかかる負荷を少くすることを課題とするものである。Further, the static magnetic field generator 1 has an outer shape made of a lump of iron as an iron core, and a copper wire is wound around the outer circumference of the iron core.
Since the structure is such that an electric current is passed through the copper wire, the weight is very large, and the load applied to the mold vibrating device installed in the mold 2 becomes large. Therefore, this mold vibrating device needs to have a large capacity, which causes problems such as an increase in equipment cost and running cost. The present invention does not have the above-mentioned problems, always exerts a stable braking force against the molten steel flow, minimizes the component mixing region of the molten steel and has good maintainability, and further reduces the load on the mold vibrating device. The task is to do so.
【０００７】[0007]
【課題を解決するための手段】本発明は、上記課題を解
決するためになされたものであり、その手段１は鋳型を
上下動振動させつつ溶鋼を注入し、この注入した溶鋼を
鋳片案内装置で案内しつつ鋳片を引抜く連続鋳造装置に
おいて、前記鋳型の直下の鋳片案内装置の支持部材に静
止磁場もしくは、移動磁場を印加する磁場発生装置を設
けたことである。Means for Solving the Problems The present invention has been made to solve the above-mentioned problems, and means 1 thereof is to inject molten steel while vertically vibrating a mold and guide the injected molten steel to a slab. In a continuous casting device for drawing a slab while guiding with a device, a magnetic field generator for applying a static magnetic field or a moving magnetic field is provided to a support member of the slab guide device directly below the mold.
【０００８】また、手段２は鋳型を上下動振動させつつ
溶鋼を注入し、この注入した溶鋼を鋳片案内装置で案内
しつつ鋳片を引抜く連続鋳造装置において、前記鋳型の
下部の厚みを薄くし、その薄くした鋳型の側周部の位置
で、かつ、前記鋳片案内装置の支持部材に静止磁場もし
くは、移動磁場を印加する磁場発生装置を設けたもので
ある。Further, the means 2 is a continuous casting apparatus for injecting molten steel while vertically vibrating the mold and for withdrawing the ingot while guiding the injected molten steel with a slab guide device. A magnetic field generator for applying a static magnetic field or a moving magnetic field is provided on the supporting member of the slab guide device at the position of the side wall of the thinned mold.
【０００９】[0009]
【作用】以下に、本発明の作用を説明する。まず、本発
明においては、磁場発生装置を鋳型に設置せずに、鋳型
の直下に設けた鋳片案内装置の支持フレームに設置する
ために、 鋳型の振動に伴って前記磁場発生装置が振動すること
がないので、該磁場発生装置から発生する磁場は鋳片に
対して常に一定に投射され、鋳型内に注入した溶鋼流れ
との相対速度は一定に保たれるために、制動力は常に安
定する。これにより、異なる鋼種を連続して鋳造する場
合の成分混合領域を最小限にすることが可能となる。The function of the present invention will be described below. First, in the present invention, since the magnetic field generator is not installed in the mold but is installed in the support frame of the slab guide device provided directly below the mold, the magnetic field generator vibrates with the vibration of the mold. Since the magnetic field generated from the magnetic field generator is constantly projected onto the slab and the relative velocity with the molten steel flow injected into the mold is kept constant, the braking force is always stable. To do. This makes it possible to minimize the component mixing region when continuously casting different steel types.
【００１０】また、鋳型交換と同時に静磁場発生装置
を交換する必要がないので、磁場発生装置の整備サイク
ルの延長を図ることができる。 さらに、鋳型振動装置に大きな負荷をかけないため、
鋳型振動装置を大きくする必要がなくなり、設備費の削
減と鋳造中のランニングコストの削減が可能となる。 また、鋳型下部の鋳型厚みを薄くすることにより、磁
場発生装置を鋳造方向（上下方向）に長くすることが可
能となり、磁場発生装置から発生する磁場は、鋳造方向
に広くおよぶことになり、磁場に侵入した溶鋼の流れ
は、広い範囲で制動を受けるために大きな制動効果が得
られる。Further, since it is not necessary to replace the static magnetic field generator with the mold replacement, the maintenance cycle of the magnetic field generator can be extended. Furthermore, because it does not place a large load on the mold vibration device,
It is not necessary to increase the size of the mold vibration device, and it is possible to reduce the equipment cost and the running cost during casting. Also, by reducing the thickness of the mold below the mold, it is possible to lengthen the magnetic field generator in the casting direction (vertical direction), and the magnetic field generated from the magnetic field generator extends widely in the casting direction. The flow of molten steel that has penetrated into the pipe is subjected to braking over a wide range, so that a large braking effect is obtained.
【００１１】[0011]
【実施例】以下、本発明の実施例を図１〜図３を参照し
つつ説明する。 （実施例１）図１は請求項１に対応する実施例であり、
幅６００〜２３００ｍｍ、厚さ２００〜４００ｍｍの断
面を有するスラブを鋳造することが可能な、可変鋳型を
有する連続鋳造装置に適用したものである。タンディシ
ュ（図示せず）に設けた浸漬ノズル３は、内径９０ｍｍ
の溶鋼流路を有し、先部には直径８０ｍｍで水平から下
向き１５°の吐出口３ａを有している。そして、この吐
出口３ａから鋳型２の短辺側に溶鋼流が吐出する。Embodiments of the present invention will be described below with reference to FIGS. (Embodiment 1) FIG. 1 is an embodiment corresponding to claim 1,
The present invention is applied to a continuous casting apparatus having a variable mold, which is capable of casting a slab having a width of 600 to 2300 mm and a thickness of 200 to 400 mm. The immersion nozzle 3 provided in the tundish (not shown) has an inner diameter of 90 mm.
And a discharge port 3a having a diameter of 80 mm and a downward angle of 15 ° from the horizontal. Then, the molten steel flow is discharged from the discharge port 3a to the short side of the mold 2.
【００１２】また、鋳型２内の溶鋼表面から吐出口３ａ
の中心までの高さＨは１００〜２５０ｍｍであり、さら
に、吐出口３ａから鋳型２の短辺側に向かって流れる溶
鋼の吐出流速は１．２７〜３．１９ｍ／秒、鋳型２内に
おける凝固セル５の生成速度は、２０〜２５ｍｍ／分で
ある。また、磁場発生装置１０の設置位置は、鋳型２の
直下で、かつ、フートロールＦＲの外周側（反鋳片側）
に位置させ、鋳片案内装置における最上段のサポートロ
ールＳＲを支持するフレーム４の上面に設置された、ス
タッドボルト７により固定設置した。In addition, from the surface of the molten steel in the mold 2 to the discharge port 3a.
Of the molten steel flowing from the discharge port 3a toward the short side of the mold 2 is 1.27 to 3.19 m / sec, and the height H to the center of the mold 2 is 100 to 250 mm. The generation rate of the cell 5 is 20 to 25 mm / min. Further, the installation position of the magnetic field generator 10 is immediately below the mold 2 and on the outer peripheral side of the foot roll FR (on the side of the non-cast piece)
And was fixedly installed by the stud bolt 7 installed on the upper surface of the frame 4 supporting the uppermost support roll SR in the slab guide device.
【００１３】そして、この磁場発生装置１０の定格電圧
は、１００〜８００ＫＶＡで、鉄芯の厚み３００ｍｍ、
幅２２００ｍｍである。コイルの捲線の厚みは１６０ｍ
ｍである。浸漬ノズル３はパウダー層６ａを介し鋳型２
の中心域に位置し、そして、浸漬ノズル３の吐出口３ａ
からの溶鋼流６の一部は、水平断面中央から鋳片の短辺
側に形成される上昇流となり、また、他の大部分は短辺
側の凝固セル面５に衝突した後に下降流となる。The rated voltage of the magnetic field generator 10 is 100 to 800 KVA, the thickness of the iron core is 300 mm,
The width is 2200 mm. The coil winding thickness is 160m
m. The dipping nozzle 3 is provided with the mold 2 through the powder layer 6a.
Located in the central area of the
A part of the molten steel flow 6 from is a rising flow formed from the center of the horizontal cross section to the short side of the slab, and most of the other is a downward flow after colliding with the solidification cell surface 5 on the short side. Become.
【００１４】しかして、吐出溶鋼流が短辺側の凝固セル
面５に衝突した後に形成された流れの強い短辺側の溶鋼
下降流と、それに伴い形成される幅中心付近の上昇流
に、鋳片幅方向に前記磁場発生装置１０により均一な磁
場を投射すると、溶鋼流れとは反対向きに渦電流（フレ
ミングの右手の法則による）と、電磁力（フレミングの
左手の法則による）が、該流れている溶鋼に均一に発生
する。また、磁場を幅方向に均一に投射することによ
り、溶鋼流は上昇流も下降流も制動することにより磁場
の出口では、均一な下降流を得ることができる。そし
て、この流速は下降流の約１０％であるために、介在物
の侵入を防ぐのに極めて有効となる。Therefore, the molten steel descending flow on the short side, which is formed after the discharged molten steel flow collides with the solidified cell surface 5 on the short side, and the ascending flow near the width center, which is formed with it, When a uniform magnetic field is projected by the magnetic field generator 10 in the width direction of the slab, an eddy current (according to Fleming's right-hand rule) and an electromagnetic force (according to Fleming's left-hand rule) are generated in the direction opposite to the molten steel flow. It occurs uniformly in the flowing molten steel. Further, by uniformly projecting the magnetic field in the width direction, both the upward flow and the downward flow of the molten steel flow are damped, so that a uniform downward flow can be obtained at the outlet of the magnetic field. Since this flow velocity is about 10% of the downward flow, it is extremely effective in preventing the intrusion of inclusions.
【００１５】（実施例２）図２は請求項２に対応する実
施例であり、鋳型２の下部を薄くして、該鋳型２をＴ字
形、すなわち、鋳造方向長さＬを８００〜９５０ｍｍ、
幅方向長さを２６００ｍｍ、上部の厚みｈ1 を６００ｍ
ｍ、下部の厚みｈ2 を３００ｍｍとしたものである。そ
して、磁場発生装置１０は鋳型２の下部の薄くなってい
る部分、およびフートロールＦＲの外周側（反鋳片側）
に位置させ、前記実施例１と同様に最上段のサポートロ
ールＳＲを支持するフレーム４の上面に設置された、ス
タッドボルト７により固定設置している。(Embodiment 2) FIG. 2 is an embodiment corresponding to claim 2, in which the lower portion of the mold 2 is made thin so that the mold 2 is T-shaped, that is, the length L in the casting direction is 800 to 950 mm.
The width direction length is 2600 mm, the upper thickness h 1 is 600 m
m, and the thickness h 2 of the lower part is 300 mm. Then, the magnetic field generator 10 includes a thin portion of the lower portion of the mold 2 and the outer peripheral side of the foot roll FR (on the side of the cast piece).
And is fixedly installed by a stud bolt 7 installed on the upper surface of the frame 4 supporting the uppermost support roll SR as in the first embodiment.
【００１６】また、図３に従来の鋳型２内に磁場発生装
置１を設置した場合と、本発明における磁場発生装置１
０の設置位置における１年間の交換回数を示す。これか
ら分かるように、本発明のように磁場発生装置１と鋳型
２を別体化することにより、磁場発生装置１の交換回数
を従来の１／５に減少させることが可能となった。Further, FIG. 3 shows the case where the magnetic field generator 1 is installed in the conventional mold 2 and the magnetic field generator 1 according to the present invention.
The number of replacements per year at the installation position of 0 is shown. As can be seen from this, by separately forming the magnetic field generator 1 and the mold 2 as in the present invention, it is possible to reduce the number of times of exchange of the magnetic field generator 1 to 1/5 of the conventional number.
【００１７】[0017]
【発明の効果】本発明によれば、磁場発生装置の制動効
果をより向上できるので、鋳片の鋳造歩留りを良好にす
ることができると共に、前記磁場発生装置の交換回数を
飛躍的に減少させ、整備の負荷を減少させることが可能
となる。さらに、鋳型の振動装置を大型化することがな
いので、設備費を向上する必要がない等の多大の効果を
奏するものであり、既設の連続鋳造設備に磁場発生装置
を設ける場合に特に有利となる。According to the present invention, since the braking effect of the magnetic field generator can be further improved, the casting yield of the slab can be improved, and the number of times of exchange of the magnetic field generator can be remarkably reduced. It is possible to reduce the maintenance load. Further, since it does not increase the size of the vibration device of the mold, it has a great effect that it is not necessary to improve the equipment cost, and is particularly advantageous when a magnetic field generator is provided in the existing continuous casting equipment. Become.
【図１】本発明の一実施例を示す簡略説明図FIG. 1 is a simplified explanatory diagram showing an embodiment of the present invention.
【図２】本発明を他の実施例を示す簡略説明図FIG. 2 is a simplified explanatory view showing another embodiment of the present invention.
【図３】本発明と従来における磁場発生装置の取替回数
の推移を示す図FIG. 3 is a diagram showing changes in the number of replacements of the magnetic field generator according to the present invention and the related art.
【図４】従来の例を示す簡略説明図FIG. 4 is a simplified explanatory diagram showing a conventional example.
２ 鋳型 ３ 浸漬ノズル ３ａ 吐出口 ４ 鋳型案内装置 ５ 凝固セル面 ６ 溶鋼 ６ａ パウダー層 １０ 磁場発生装置 ＦＲ フロートロール ＳＲ サポートロール 2 Mold 3 Immersion Nozzle 3a Discharge Port 4 Mold Guiding Device 5 Solidification Cell Surface 6 Molten Steel 6a Powder Layer 10 Magnetic Field Generator FR Float Roll SR Support Roll
Claims (2)
し、この注入した溶鋼を鋳片案内装置で案内しつつ鋳片
を引抜く連続鋳造装置において、前記鋳型の直下の鋳片
案内装置の支持部材に静止磁場もしくは、移動磁場を印
加する磁場発生装置を設けたことを特徴とする鋼の連続
鋳造装置。1. A continuous casting apparatus for injecting molten steel while vertically oscillating a mold, and withdrawing the ingot while guiding the injected molten steel with a slab guide device. A continuous casting apparatus for steel, comprising a magnetic field generator for applying a static magnetic field or a moving magnetic field to a supporting member.
し、この注入した溶鋼を鋳片案内装置で案内しつつ鋳片
を引抜く連続鋳造装置において、前記鋳型の下部の厚み
を薄くし、その薄くした鋳型の側周部の位置で、かつ、
前記鋳片案内装置の支持部材に静止磁場もしくは、移動
磁場を印加する磁場発生装置を設けたことを特徴とする
鋼の連続鋳造装置。2. In a continuous casting device for injecting molten steel while vertically vibrating the mold and guiding the injected molten steel with a slab guide device, the thickness of the lower part of the mold is reduced, At the position of the side of the thinned mold, and
A continuous casting apparatus for steel, wherein a magnetic field generator for applying a static magnetic field or a moving magnetic field is provided on a support member of the slab guide device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06891495A JP3389366B2 (en) | 1995-03-03 | 1995-03-03 | Steel continuous casting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06891495A JP3389366B2 (en) | 1995-03-03 | 1995-03-03 | Steel continuous casting equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08243697A true JPH08243697A (en) | 1996-09-24 |
| JP3389366B2 JP3389366B2 (en) | 2003-03-24 |
Family
ID=13387405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06891495A Expired - Fee Related JP3389366B2 (en) | 1995-03-03 | 1995-03-03 | Steel continuous casting equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3389366B2 (en) |
-
1995
- 1995-03-03 JP JP06891495A patent/JP3389366B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3389366B2 (en) | 2003-03-24 |
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