JPH08155609A - Method for continuously casting molten metal - Google Patents
Method for continuously casting molten metalInfo
- Publication number
- JPH08155609A JPH08155609A JP30583194A JP30583194A JPH08155609A JP H08155609 A JPH08155609 A JP H08155609A JP 30583194 A JP30583194 A JP 30583194A JP 30583194 A JP30583194 A JP 30583194A JP H08155609 A JPH08155609 A JP H08155609A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- mold
- molten steel
- electromagnetic coil
- variating
- 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.)
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- Continuous Casting (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、主として、鋼、ステン
レス、合金などを鋳造対象とする固定鋳型を用いた溶融
金属の連続鋳造方法において、鋳型の外側に電磁コイル
を配設し、鋳型内の溶融金属にピンチ力を付与して潤滑
剤の送り込みを促進させるとともに、鋳型内溶融金属湯
面の擾乱を抑制する溶融金属の連続鋳造方法に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mainly applied to a continuous casting method for molten metal using a fixed mold for casting steel, stainless steel, alloys, etc. The present invention relates to a continuous casting method for molten metal, which applies a pinch force to the molten metal to accelerate the feeding of the lubricant and suppress the disturbance of the molten metal surface in the mold.
【０００２】[0002]
【従来の技術】従来から、例えば鋼の連続鋳造プロセス
においては、溶鋼湯面に添加され、溶融する潤滑剤は、
所定の条件で振動する鋳型と一定速度で引き抜かれる凝
固シェルとの間にこれらの相互作用あるいは自然落下に
よって流入、消費されるもので、この潤滑剤による潤滑
性の良否は連続鋳造の操業性、鋳片の品質特に表面性状
に大きく影響することが知られている。2. Description of the Related Art Conventionally, for example, in a continuous casting process of steel, a lubricant added to the molten steel surface and melted is
It flows in and is consumed by these interactions or a natural drop between the mold that vibrates under a predetermined condition and the solidified shell that is pulled out at a constant speed, and it is consumed. It is known that the quality of the slab, especially the surface quality, is greatly affected.
【０００３】この潤滑剤の消費量は、鋳型と凝固シェル
間の潤滑を支配する重要な因子と考えられており、これ
を増加させるために種々の方策が提案されている。例え
ば、特開昭５２−３２８３４号公報などには、例えば、
図４に示すように、銅板１ａで形成された固定鋳型１の
外側に、バックプレート２を介してこれを包囲するよう
に鉄心３ｓにコイル３ｃを巻回してなる電磁コイル３を
配設するとともに、この鋳型内に浸漬ノズル４を配設
し、この浸漬ノズルから鋳型内に溶融金属ｓを注入しな
がら、電源５から電磁コイル３に通電し、鋳型内溶融金
属ｓの鋳型近傍部を電磁力によりピンチして、溶融金属
の湯面を鋳型１近傍で湾曲せしめ陥没部６を形成するこ
とにより、潤滑剤（パウダー）ｐの送り込みを促進して
潤滑性を高めて、凝固後の鋳片ｓｃの表面性状を改善す
ることが開示されている。The consumption of this lubricant is considered to be an important factor controlling the lubrication between the mold and the solidified shell, and various measures have been proposed to increase the consumption. For example, in Japanese Patent Laid-Open No. 52-32834, for example,
As shown in FIG. 4, an electromagnetic coil 3 formed by winding a coil 3c around an iron core 3s is provided outside the fixed mold 1 formed of a copper plate 1a so as to surround the fixed plate 1 via a back plate 2. An immersion nozzle 4 is disposed in this mold, and while the molten metal s is injected from the immersion nozzle into the mold, the power source 5 energizes the electromagnetic coil 3 to apply electromagnetic force to the vicinity of the mold of the molten metal s. By pinching with the curved surface of the molten metal in the vicinity of the mold 1 to form the depressed portion 6, the feeding of the lubricant (powder) p is promoted to improve the lubricity, and the cast slab sc after solidification It is disclosed to improve the surface texture of the.
【０００４】ここに開示されているような連続鋳造方法
において、固定鋳型の外側に配置した電磁コイルに通電
して鋳型内溶融金属に電磁力を作用させて、鋳型内溶融
金属のメニスカスを盛り上げる場合に、電磁力によっ
て、異常流動が発生し、溶融金属の湯面ｓｆが点線で示
すように擾乱（異常流動）し、メニスカスが好ましくな
い変形を生じ、均一な表面性状を有する鋳片を得ること
ができないという問題がある。In the continuous casting method as disclosed herein, when the electromagnetic coil arranged outside the fixed mold is energized to apply an electromagnetic force to the molten metal in the mold to raise the meniscus of the molten metal in the mold. In addition, due to electromagnetic force, abnormal flow occurs, the molten metal surface sf is disturbed (abnormal flow) as shown by the dotted line, the meniscus undergoes undesirable deformation, and a slab having a uniform surface texture is obtained. There is a problem that you can not.
【０００５】[0005]
【発明が解決しようとする課題】本発明においては、溶
融金属を注入して凝固させる固定鋳型の外側に電磁コイ
ルを配置し、鋳型内溶融金属に電磁力を付与しながら鋳
造を行う溶融金属の連続鋳造方法において、鋳型内溶融
金属にピンチするとともに、溶融金属湯面の擾乱（異常
流動）を抑制することにより、均一な表面性状を有する
鋳片を鋳造できる溶融金属の連続鋳造方法を提供するも
のである。SUMMARY OF THE INVENTION In the present invention, an electromagnetic coil is arranged outside a fixed mold for injecting and solidifying molten metal, and the molten metal is cast while applying electromagnetic force to the molten metal in the mold. A continuous casting method for a molten metal capable of casting a slab having a uniform surface texture by pinching molten metal in a mold and suppressing disturbance (abnormal flow) of the molten metal surface in the continuous casting method It is a thing.
【０００６】[0006]
【課題を解決するための手段】本発明の第一の発明は、
溶融金属を注入して凝固させる固定鋳型の外側に電磁コ
イルを配置し、鋳型内溶融金属を電磁力によりピンチし
ながら鋳造を行う溶融金属の連続鋳造方法において、鋳
型内溶融金属の湯面変形量を複数箇所で測定し、この変
形量に応じて電磁コイルに通電する電流を制御して、溶
融金属湯面の擾乱を抑制することを特徴とする溶融金属
の連続鋳造方法。The first invention of the present invention is as follows:
Injecting molten metal to solidify it A magnetic coil is placed outside the fixed mold and the molten metal in the mold is cast while being pinched by electromagnetic force. Is measured at a plurality of points, and the current applied to the electromagnetic coil is controlled according to the amount of deformation to suppress the disturbance of the molten metal surface, thereby continuously casting the molten metal.
【０００７】また、第二の発明は、第一の発明におい
て、鋳型内溶融金属の湯面変形量を測定する複数のセン
サーを、鋳型内溶融金属の湯面上において鋳型中心から
対称な位置に配置し、この対称な位置のセンサーからの
出力の差があるレベル以上になった場合は、電磁コイル
への通電電流を小さくし、この対称な位置のセンサーか
らの出力差があるレベル以下になった場合は、電磁コイ
ルへの通電電流を大きくすることを特徴とすることを特
徴とする溶融金属の連続鋳造方法である。In a second aspect of the invention, in the first aspect of the invention, a plurality of sensors for measuring the amount of deformation of the molten metal in the mold are placed at symmetrical positions on the molten metal in the mold from the center of the mold. If the difference in the output from the sensor at this symmetrical position exceeds a certain level, reduce the energizing current to the electromagnetic coil so that the output difference from the sensor at this symmetrical position becomes less than a certain level. In this case, the method is a continuous casting method for molten metal, characterized in that the current passing through the electromagnetic coil is increased.
【０００８】[0008]
【作用】本発明においては、溶融金属を注入して凝固さ
せる固定鋳型の外側に電磁コイルを配置し、鋳型内溶融
金属を電磁力によりピンチしながら鋳造を行う溶融金属
の連続鋳造方法において、鋳型内溶融金属をピンチする
とともに、鋳型内溶融金属湯面の擾乱（異常流動）を抑
制することにより、均一な表面性状を有する鋳片を鋳造
できる。According to the present invention, in a continuous casting method for a molten metal, an electromagnetic coil is arranged outside a fixed mold for injecting and solidifying the molten metal, and casting is performed while pinching the molten metal in the mold by electromagnetic force. By pinching the molten metal in the mold and suppressing the disturbance (abnormal flow) of the molten metal surface in the mold, it is possible to cast a slab having a uniform surface texture.
【０００９】本発明者等は、溶融金属を注入して凝固さ
せる固定鋳型の外側に電磁コイルを配置し、鋳型内溶融
金属を電磁力によりピンチしながら鋳造を行う溶融金属
の連続鋳造方法について種々の実験を通じて、電磁コイ
ルに電磁力を発生させて鋳型内溶融金属の湯面を盛り上
げる場合に、電磁力がによって湯面が擾乱（異常流動）
して、表面性状が均一で良好な鋳片が得られないことを
知見した。そして、このように、鋳型内溶融金属の湯面
に好ましくない擾乱が発生した場合、鋳型中心から対称
な位置の湯面変形量は、非対称な値を示すこともを知見
した。The present inventors have various methods for continuous casting of molten metal in which an electromagnetic coil is arranged outside a fixed mold for injecting and solidifying the molten metal, and the molten metal in the mold is cast while being pinched by electromagnetic force. Through the experiment, when electromagnetic force is generated in the electromagnetic coil to raise the molten metal level in the mold, the electromagnetic force causes disturbance of the molten metal level (abnormal flow).
Then, it was found that a good slab with a uniform surface property could not be obtained. Then, it was also found that when an undesired disturbance occurs on the molten metal surface of the molten metal in the mold, the amount of deformation of the molten metal surface at a position symmetrical with respect to the center of the mold shows an asymmetric value.
【００１０】そこで、本発明者等は、鋳型内の対象な位
置の湯面変形量の差を測定し、この変形量の差に応じ
て、電磁コイルへの通電電流を増減し、電磁力を制御す
ることにより、メニスカスの変形量を抑制することを着
想し、本発明を完成したものである。Therefore, the inventors of the present invention measure the difference in the amount of deformation of the molten metal surface at a target position in the mold, and increase or decrease the energizing current to the electromagnetic coil in accordance with the difference in the amount of deformation to change the electromagnetic force. The present invention has been completed with the idea of suppressing the amount of meniscus deformation by controlling.
【００１１】本発明において、湯面変形量を測定するセ
ンサーは、実操業下では、鋳型内溶融金属の湯面は、潤
滑剤や酸化物で覆われている場合が多いので、測定精度
確保の観点から潤滑剤や酸化物による精度低下の懸念が
ない渦電流センサーなどの非接触式のセンサーを用いる
ことが望ましい。また、このセンサーによる測定点につ
いては、例えば矩形型の固定鋳型を用いる場合には、図
２に示すように、鋳型の中心ｏから短辺方向に距離ｘ1
離して対称に測定点ａと測定点ｂを配置することが望ま
しい。In the present invention, since the sensor for measuring the amount of deformation of the molten metal surface is often covered with a lubricant or oxide in the actual operation, the molten metal surface in the mold is often covered with a lubricant or an oxide. From the viewpoint, it is desirable to use a non-contact type sensor such as an eddy current sensor, which does not have a concern of deterioration of accuracy due to a lubricant or an oxide. Further, regarding the measurement point by this sensor, for example, when a rectangular fixed mold is used, as shown in FIG. 2, a distance x 1 from the center o of the mold in the short side direction.
It is desirable to dispose the measurement points a and b symmetrically apart from each other.
【００１２】また、軸対称な構造である円形の鋳型を用
いる場合、測定点は対称軸より等距離の点に選べば良
く、図３に示すように、鋳型中心ｏからｘ2 離して対称
に、あるいは周方向に等角度（例えば１２０度で３点）
配置することが望ましい。この測定点はメニスカスの変
形状態をより精度よく測定する観点から２点以上にする
ことが好ましい。[0012] In the case of using a circular template is axially symmetrical structure, the measurement points may be selected to equidistant points from the symmetry axis, as shown in FIG. 3, symmetrically x 2 away from the mold center o , Or equiangular in the circumferential direction (for example, 3 points at 120 degrees)
It is desirable to place them. It is preferable to set two or more measurement points from the viewpoint of more accurately measuring the deformed state of the meniscus.
【００１３】なお、配置距離ｘ1 、ｘ2 の値について
は、実験、実績、計算等によって予めあるいは学習的
に、鋳造対象、鋳型形状、鋳型サイズ、浸漬ノズル条
件、鋳造速度等の鋳造条件に応じて設定する。The values of the disposition distances x 1 and x 2 may be determined in advance or through learning through experiments, achievements, calculations, etc. in accordance with casting conditions such as casting object, mold shape, mold size, immersion nozzle condition, casting speed, etc. Set accordingly.
【００１４】本発明は鋼の他、ステンレス、合金などを
鋳造対象とする、外側に電磁コイルを配設して鋳型内溶
融金属をピンチできるようにした固定鋳型を用いた連続
鋳造方法としても適用可能である。The present invention is also applicable as a continuous casting method using not only steel but also stainless steel, alloys, etc. as a casting object, using a fixed mold in which an electromagnetic coil is arranged outside and a molten metal in the mold can be pinched. It is possible.
【００１５】[0015]
（実施例１）以下に本発明を溶鋼の連続鋳造方法におい
て適用した場合の実施例を実施装置例とともに説明す
る。この実施例は、図１に示すように、角型の固定鋳型
を用いた連続鋳造装置において、鋳型１内の溶鋼ｓ湯面
から距離ｙ離れた上方に、鋳型中心ｏから距離ｘ離れ対
称に配設された一対の渦電流センサー７ａ，７ｂが配置
されている。これらの渦流センサーは電源８により作動
し、タイマー９を介して設定されたタイミングで鋳型内
溶鋼湯面の測定点ａおよび測定点ｂの湯面変形量を測定
する。(Embodiment 1) Hereinafter, an embodiment in which the present invention is applied to a continuous casting method for molten steel will be described together with an embodiment apparatus example. In this embodiment, as shown in FIG. 1, in a continuous casting apparatus using a square fixed mold, a distance y from the molten steel s molten metal surface in the mold 1 and a distance x from the mold center o are symmetrical. A pair of arranged eddy current sensors 7a and 7b are arranged. These eddy current sensors are operated by the power supply 8 and measure the amount of deformation of the molten metal at the measurement points a and b of the molten steel molten metal in the mold at the timing set by the timer 9.
【００１６】この渦電流センサー７ａ，７ｂからの湯面
変形量の測定情報ｈ1 、ｈ2 は同時に比較部１０に送ら
れ、ここで湯面変形量の差△ｈ（±）が求められ、乗算
器１１で定数処理されてｋ△ｈが比較器１２に出力され
る。この比較器１２には、ｋ△ｈの許容範囲と許容範囲
を超えた場合における電磁コイル３への通電電流の減少
レベル等が設定されており、また、ｋ△ｈが許容範囲に
復した場合の電磁コイルへの通電電流の増加レベルなど
が設定値されている。The measurement information h 1 and h 2 of the amount of deformation of the molten metal from the eddy current sensors 7a and 7b are simultaneously sent to the comparison unit 10 where the difference Δh (±) of the amount of deformation of the molten metal is obtained. The multiplier 11 performs constant processing and outputs kΔh to the comparator 12. In this comparator 12, the allowable range of kΔh and the level of decrease in the current flowing to the electromagnetic coil 3 when the allowable range is exceeded are set, and when kΔh returns to the allowable range. The increase level of the energizing current to the electromagnetic coil is set.
【００１７】この比較器で設定値とｋ△ｈとが比較演算
される。ｋ△ｈが許容範囲を超えた場合、ここでは、湯
面に擾乱が発生していることを示していることを意味し
ており、通電電流の切り換え指令（通電電流減少指令）
信号が電源制御装置に送信され、電源５から電磁コイル
３への通電電流を減少させるようにしている。The comparator compares the set value with kΔh. When kΔh exceeds the allowable range, it means that disturbance is occurring on the molten metal surface, and the energization current switching command (energization current decrease command) is given.
A signal is transmitted to the power supply control device to reduce the current flowing from the power supply 5 to the electromagnetic coil 3.
【００１８】この場合、電磁力の作用効果が小さくなる
ので、減少させたままにすることはできないので、ｋ△
ｈが許容範囲に復した場合には、直ちに電磁コイルへの
通電電流レベルを初期の設定レベルに復帰させる。この
ような湯面変形量の測定と、この測定に基づく電磁コイ
ルへの通電電流の制御は連続的であっても、一定の時間
間隔で行うようにしてもよい。In this case, since the effect of the electromagnetic force becomes small, it cannot be kept reduced, so kΔ
When h returns to the permissible range, the current level to the electromagnetic coil is immediately returned to the initial set level. Such measurement of the molten metal surface deformation amount and control of the current supplied to the electromagnetic coil based on this measurement may be performed continuously or at regular time intervals.
【００１９】本発明においては、このようにして鋳型内
の溶鋼の湯面変形量を測定して、この測定結果に応じ
て、鋳型内溶鋼湯面の対称な変形を抑制するように、電
磁コイルに対する通電電流を制御（増減）し、鋳型内溶
鋼湯面ｓｆの擾乱を抑制することによって、表面性状の
良好な鋳片を鋳造可能にする。According to the present invention, the amount of molten steel surface deformation of the molten steel in the mold is measured in this manner, and the electromagnetic coil is used to suppress symmetrical deformation of the molten steel molten metal surface in the mold according to the measurement result. By controlling (increasing / decreasing) the energization current to the steel plate and suppressing the disturbance of the molten steel surface sf in the mold, it is possible to cast a slab having a good surface quality.
【００２０】（実施例１−１）図１に示す実施例のよう
な構成を有する鋳型を用い、渦電流センサー７ａ，７ｂ
をそれぞれ鋳型中心ｏから短辺側に７５０mmの位置にお
いて、溶鋼湯面ｓｆから４０mm上方に配置し、０．１秒
毎に溶鋼湯面の位置を測定し、この測定結果に応じて、
予め設定した条件に基づき、電磁コイルに対する通電電
流を制御（通電電流の増減）を行いながら、連続鋳造を
実施した。(Embodiment 1-1) Eddy current sensors 7a and 7b are used by using a mold having a structure as shown in FIG.
At a position of 750 mm on the short side from the center o of the mold, respectively, arranged 40 mm above the molten steel surface sf and measuring the position of the molten steel surface every 0.1 seconds, and according to this measurement result,
Continuous casting was performed while controlling the energizing current to the electromagnetic coil (increasing or decreasing the energizing current) based on the preset conditions.
【００２１】ここでは、定数ｋを１にし、二つの測定点
での溶鋼湯面位置の差ｋ△ｈの許容範囲を５mmに設定
し、この値を超えた場合に電磁コイルに対する通電電流
を減少させ、この許容範囲に復した場合に電磁コイルに
対する通電電流を初期の設定値に増加させた。Here, the constant k is set to 1, and the allowable range of the difference kΔh in the molten steel surface positions at the two measurement points is set to 5 mm, and when the value exceeds this value, the energizing current to the electromagnetic coil is reduced. Then, when returning to the permissible range, the energizing current to the electromagnetic coil was increased to the initial set value.
【００２２】その結果、コーナー部から周辺に向かって
発生する流動が抑制され、鋳型内溶鋼湯面ｓｆのメニス
カス全体が安定して盛り上がる効果を得ることができ、
得られた鋳片は、コーナー部、長辺部ともにオシレーシ
ョンマークの平均深さは７０μｍで電磁コイルを配置し
ない場合の３００μｍに対し、顕著な改善効果が認めら
れた。As a result, the flow generated from the corners toward the periphery is suppressed, and the effect of stably raising the entire meniscus of the molten steel molten metal surface sf in the mold can be obtained.
In the obtained slab, the average depth of the oscillation marks was 70 μm at both the corners and the long sides, and a remarkable improvement effect was recognized compared to 300 μm when the electromagnetic coil was not arranged.
【００２３】（比較例）図４に示すような本発明を適用
しない従来の電磁コイルを配置した鋳型を用いて、鋳型
に電磁力による磁場を印加しながら連続鋳造を実施し
た。その結果、得られた鋳片は、コーナー部と、その近
傍部分でシレーションマークが消失し、この部分の表面
性状は満足できるものの、それ以外の部分、特に長辺部
分では乱れたオシレーションマークや湯しわ、潤滑剤の
巻き込みが見られ、表面性状改善効果が周方向に均一で
はなかった。これは、擾乱が発生し、かつ、コーナーか
らその周辺部に向かって流動が発生したためである。(Comparative Example) Continuous casting was carried out by using a mold having a conventional electromagnetic coil, to which the present invention is not applied, as shown in FIG. 4, while applying a magnetic field by an electromagnetic force to the mold. As a result, in the obtained cast piece, the silication marks disappeared at the corners and in the vicinity thereof, and although the surface texture of this part was satisfactory, the oscillation marks were disturbed in other parts, especially in the long side part. There were wrinkles, hot water wrinkles and the inclusion of lubricant, and the effect of improving the surface properties was not uniform in the circumferential direction. This is because a disturbance was generated and a flow was generated from the corner toward the peripheral portion.
【００２４】鋳造条件（実施例、比較例共通） 鋳片 鋼種：炭素鋼 サイズ：幅 １５００mm，キャビティ厚み ２５０mm 鋳型 高さ：８００mm 鋳型板中央部厚み：２５mm バックプレート（ＳＵＳ３０４） 厚み：４０mm 電磁コイル サイズ：内寸法 １７００mm×４５０mm 磁束密度：１２００ガウス 鋳造速度：２m/min 鋳型へのオシレーション付与：周波数 １２０cpm ，ス
トローク±５mmCasting Conditions (Common to Examples and Comparative Examples) Cast Steel Type: Carbon Steel Size: Width 1500 mm, Cavity Thickness 250 mm Mold Height: 800 mm Center Plate Thickness: 25 mm Back Plate (SUS304) Thickness: 40 mm Electromagnetic Coil Size : Inner size 1700mm × 450mm Magnetic flux density: 1200 gauss Casting speed: 2m / min Oscillation applied to mold: Frequency 120cpm, Stroke ± 5mm
【００２５】[0025]
【発明の効果】本発明においては、溶融金属を注入して
凝固させる固定鋳型の外側に電磁コイルを配置し、鋳型
内溶融金属を電磁力によりピンチしながら鋳造を行う溶
融金属の連続鋳造方法において、鋳型内溶融金属をピン
チするとともに、鋳型内溶融金属湯面の擾乱（異常流
動）を抑制することにより、均一な表面性状を有する鋳
片を鋳造できる。INDUSTRIAL APPLICABILITY In the present invention, there is provided a continuous casting method for molten metal, in which an electromagnetic coil is arranged outside a fixed mold for injecting and solidifying molten metal, and the molten metal in the mold is cast while being pinched by electromagnetic force. By pinching the molten metal in the mold and suppressing the disturbance (abnormal flow) of the molten metal surface in the mold, it is possible to cast a slab having a uniform surface texture.
【図１】本発明を実施する連続鋳造装置の鋳型構造例を
示す縦断面概要説明図。FIG. 1 is a vertical cross-sectional schematic explanatory view showing an example of a mold structure of a continuous casting apparatus for carrying out the present invention.
【図２】本発明における鋳型内溶融金属の湯面の位置測
定点配置例を示す平面概要説明図。FIG. 2 is a schematic plan view showing an arrangement example of position measurement points on the molten metal surface of the molten metal in the mold according to the present invention.
【図３】本発明における鋳型内溶融金属の湯面の位置測
定点配置例を示す平面概要説明図。FIG. 3 is a schematic plan view showing an arrangement example of position measurement points on the molten metal surface of the molten metal in the mold according to the present invention.
【図４】（ａ）図は本発明を適用する溶鋼の連続鋳造装
置例を示す縦断面概要説明図、（ｂ）図は、（ａ）図の
平面概要説明図。FIG. 4 (a) is a vertical cross-sectional schematic explanatory view showing an example of a molten steel continuous casting apparatus to which the present invention is applied, and FIG. 4 (b) is a schematic plan explanatory view of FIG. 4 (a).
１ 鋳型 １ａ 銅板 ２ バックプレート ３ 電磁コイル ４ 浸漬ノズル ５ 電源（電磁コイル用） ６ 湯面陥没部 ７ａ，７ｂ 渦電流センサー ８ 電源（渦電流センサー用） ９ タイマー １０ 比較部 １１ 乗算器 １２ 比較器 ｓ 溶鋼（溶融金属） ｓｆ 溶鋼湯面 ｓｃ 鋳片 ｐ 潤滑剤（パウダー） DESCRIPTION OF SYMBOLS 1 Mold 1a Copper plate 2 Back plate 3 Electromagnetic coil 4 Immersion nozzle 5 Power supply (for electromagnetic coil) 6 Depression part 7a, 7b Eddy current sensor 8 Power supply (for eddy current sensor) 9 Timer 10 Comparison part 11 Multiplier 12 Comparator s Molten steel (molten metal) sf Molten steel molten metal surface sc Cast slab p Lubricant (powder)
───────────────────────────────────────────────────── フロントページの続き (72)発明者 藤 健彦 千葉県富津市新富20−１ 新日本製鐵株式 会社技術開発本部内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takehiko Fuji, 20-1 Shintomi, Futtsu-shi, Chiba Nippon Steel Corp. Technology Development Division
Claims (2)
の外側に電磁コイルを配置し、鋳型内溶融金属を電磁力
によりピンチしながら鋳造を行う溶融金属の連続鋳造方
法において、鋳型内溶融金属の湯面変形量を複数箇所で
測定し、この変形量に応じて電磁コイルに通電する電流
を制御して、溶融金属湯面の擾乱を抑制することを特徴
とする溶融金属の連続鋳造方法。1. A continuous casting method for molten metal, wherein an electromagnetic coil is arranged outside a fixed mold for injecting and solidifying molten metal, and the molten metal in the mold is cast while being pinched by electromagnetic force. A continuous casting method for molten metal, characterized in that the amount of deformation of the molten metal is measured at a plurality of points, and the current applied to the electromagnetic coil is controlled according to the amount of deformation to suppress the disturbance of the molten metal surface.
複数のセンサーを、鋳型内溶融金属の湯面上において鋳
型中心から対称な位置に配置し、この対称な位置のセン
サーからの出力の差があるレベル以上になった場合は、
電磁コイルへの通電電流を小さくし、この対称な位置の
センサーからの出力差があるレベル以下になった場合
は、電磁コイルへの通電電流を大きくすることを特徴と
する請求項１記載の溶融金属の連続鋳造方法。2. A plurality of sensors for measuring the deformation level of the molten metal in the mold are arranged symmetrically with respect to the center of the mold on the molten metal surface of the molten metal in the mold, and outputs from the sensors at the symmetrical positions. If the difference between is above a certain level,
The melting current according to claim 1, wherein the current supplied to the electromagnetic coil is reduced, and the current supplied to the electromagnetic coil is increased when the output difference from the sensor at the symmetrical position is below a certain level. Continuous metal casting method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06305831A JP3088917B2 (en) | 1994-12-09 | 1994-12-09 | Continuous casting method of molten metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06305831A JP3088917B2 (en) | 1994-12-09 | 1994-12-09 | Continuous casting method of molten metal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08155609A true JPH08155609A (en) | 1996-06-18 |
| JP3088917B2 JP3088917B2 (en) | 2000-09-18 |
Family
ID=17949904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06305831A Expired - Lifetime JP3088917B2 (en) | 1994-12-09 | 1994-12-09 | Continuous casting method of molten metal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3088917B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100423743B1 (en) * | 1998-12-21 | 2004-06-18 | 주식회사 포스코 | In-mold position measuring device for electromagnetic continuous casting equipment |
| KR100427227B1 (en) * | 1998-12-14 | 2004-09-07 | 주식회사 포스코 | METHOD AND APPARATUS FOR MEASUREMENT OF METHOD OF MOLD SIDE IN MOLD |
| KR100466179B1 (en) * | 1999-07-16 | 2005-01-13 | 주식회사 포스코 | Measuring method of molten steel level in electromagnetic casting |
-
1994
- 1994-12-09 JP JP06305831A patent/JP3088917B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100427227B1 (en) * | 1998-12-14 | 2004-09-07 | 주식회사 포스코 | METHOD AND APPARATUS FOR MEASUREMENT OF METHOD OF MOLD SIDE IN MOLD |
| KR100423743B1 (en) * | 1998-12-21 | 2004-06-18 | 주식회사 포스코 | In-mold position measuring device for electromagnetic continuous casting equipment |
| KR100466179B1 (en) * | 1999-07-16 | 2005-01-13 | 주식회사 포스코 | Measuring method of molten steel level in electromagnetic casting |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3088917B2 (en) | 2000-09-18 |
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