JP2978356B2 - Metal continuous casting method - Google Patents
Metal continuous casting methodInfo
- Publication number
- JP2978356B2 JP2978356B2 JP5082221A JP8222193A JP2978356B2 JP 2978356 B2 JP2978356 B2 JP 2978356B2 JP 5082221 A JP5082221 A JP 5082221A JP 8222193 A JP8222193 A JP 8222193A JP 2978356 B2 JP2978356 B2 JP 2978356B2
- Authority
- JP
- Japan
- Prior art keywords
- thickness
- copper plate
- mold
- electromagnetic stirring
- 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.)
- Expired - Lifetime
Links
Landscapes
- Continuous Casting (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は溶融金属の連続鋳造方法
に関し、特に電磁撹拌モールド装置の制御方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for continuously casting molten metal, and more particularly to a method for controlling an electromagnetic stirring mold apparatus.
【０００２】[0002]
【従来の技術】従来、連鋳機におけるモールド部で電磁
撹拌することは、表面性状の向上、たてわれ防止に用い
られている。例えば特開平１−２２８６４５号公報にお
いては図５に示す連続鋳造装置の開示がある。即ち、鋳
型は幅可変可能にした短辺２と、この短辺２を挟持して
鋳型プールを形成する長辺１と、長辺１の水冷箱５内に
設置した電磁撹拌装置７とから成る。図中の１１は鋳造
されたスラブである。電磁撹拌装置７は長辺１各々の長
軸方向に沿って複数個配列したコイル１０装着のコア９
群から成り、鋳造プールの溶鋼を矢印ａ，ｂ方向に水平
流動させるものである。2. Description of the Related Art Conventionally, electromagnetic stirring in a mold section of a continuous casting machine has been used for improving the surface properties and preventing warping. For example, JP-A-1-228645 discloses a continuous casting apparatus shown in FIG. That is, the mold comprises a short side 2 having a variable width, a long side 1 sandwiching the short side 2 to form a mold pool, and an electromagnetic stirring device 7 installed in a water cooling box 5 of the long side 1. . 11 in the figure is casting
It is a slab. The electromagnetic stirrer 7 has a plurality of cores 9 with coils 10 arranged along the long axis direction of each of the long sides 1.
It consists of a group, and makes the molten steel in the casting pool flow horizontally in the directions of arrows a and b.
【０００３】[0003]
【発明が解決しようとする課題】連続鋳造の実操業にお
いては、鋳型の溶鋼流動によって鋳型銅板の厚みが薄く
なるが、銅板厚みと動作すべき最適周波数との関係は従
来必ずしも明確ではないため、操業に決められた一定周
波数で動作されており、必ずしも効率の良いものではな
かった。本発明は電磁撹拌装置をもつ連続鋳造におい
て、電気効率が優れた鋳造方法を提供するものである。In the actual operation of continuous casting, the thickness of the mold copper plate is reduced by the flow of molten steel in the mold, but the relationship between the thickness of the copper plate and the optimum frequency to be operated is not always clear. It was operating at a fixed frequency determined for operation and was not always efficient. The present invention provides a casting method having excellent electric efficiency in continuous casting having an electromagnetic stirring device.
【０００４】[0004]
【課題を解決するための手段】本発明の要旨は次の通り
である。The gist of the present invention is as follows.
【０００５】（１）電磁撹拌機構をもつ鋳造鋳型の基準
面の銅板厚みを実測して、銅板厚みに対応して前記電磁
撹拌機構の発生するローレンツ力が最大となる電源の動
作周波数を求め、該動作周波数の電流を電磁撹拌コイル
に供給することを特徴とする金属の連続鋳造方法。 （２）電磁撹拌コイルの中心レベルに相当する鋳型銅板
の厚みを測定することを特徴とする前記（１）記載の金
属の連続鋳造方法。(1) The thickness of a copper plate on a reference surface of a casting mold having an electromagnetic stirring mechanism is actually measured, and the electromagnetic force is measured in accordance with the thickness of the copper plate.
A continuous casting method for metal, comprising: obtaining an operating frequency of a power supply at which a Lorentz force generated by a stirring mechanism is maximized; and supplying a current having the operating frequency to an electromagnetic stirring coil. (2) The method for continuous casting of metal according to the above (1), wherein the thickness of the mold copper plate corresponding to the center level of the electromagnetic stirring coil is measured.
【０００６】[0006]
【作用】実験によると電磁撹拌モールド装置において
は、銅板厚みとコイルに印可する電流の周波数とは図２
の比例関係を示した。即ち本発明は予め鋳造鋳型の銅板
厚みに応じた最適動作周波数を計算又は実験にて求め
て、プロコンにインストールしておき、操業に当りオフ
ラインにて鋳型銅板厚みを実測し、各鋳造に応じて、最
適動作周波数をプロコンで求め、電源の動作周波数とし
て指令する。電源はこの動作周波数を撹拌コイルに供給
するので、効率良い撹拌が最低の電力で実現できる。本
発明における鋳型銅板の厚み測定は、好ましくは電磁撹
拌コイルの中心レベル相当ラインからメニスカス近傍と
する。According to the experiment, the thickness of the copper plate and the frequency of the current applied to the coil in the electromagnetic stirring mold apparatus are shown in FIG.
Showed a proportional relationship. That is, in the present invention, the optimum operating frequency according to the thickness of the copper plate of the casting mold is obtained in advance by calculation or experiment, installed in the computer, and the thickness of the copper plate is actually measured offline during the operation, and according to each casting. , The optimum operating frequency is obtained by a computer, and the command is issued as the operating frequency of the power supply. Since the power supply supplies this operating frequency to the stirring coil, efficient stirring can be realized with the minimum power. In the present invention, the thickness of the mold copper plate is preferably measured from a line corresponding to the center level of the electromagnetic stirring coil to the vicinity of the meniscus.
【０００７】[0007]
【実施例】図１に本発明の実施例の説明図を示す。連続
鋳造鋳型は長辺１と短辺（図示せず）とを有し、２５mm
厚の銅板がライニングされ、撹拌コイル１０を内設する
電磁撹拌機構を配設している。図中の１１は鋳造された
スラブである。本発明における周波数選択装置２０に
は、銅板厚み計１５、プロコン１２、電源インバータ１
３、交流電源１４を設ける。FIG. 1 is an explanatory view of an embodiment of the present invention. The continuous casting mold has a long side 1 and a short side (not shown) and has a length of 25 mm.
A thick copper plate is lined, and an electromagnetic stirring mechanism in which the stirring coil 10 is provided is provided. 11 in the figure was cast
It is a slab. The frequency selection device 20 in the present invention includes a copper plate thickness gauge 15, a process controller 12, a power inverter 1
3. An AC power supply 14 is provided.
【０００８】オフラインにおいて鋳型銅板厚み毎の周波
数−ローレンツ力を求めたところ図３を得た。When the frequency-Lorentz force for each thickness of the mold copper plate was determined off-line, FIG. 3 was obtained.
【０００９】図４は図３の周波数１Hz以上の拡大図表で
ある。図３により最大ローレンツ力を求めると表１を得
る。FIG. 4 is an enlarged chart of FIG. 3 at a frequency of 1 Hz or more. Table 1 is obtained when the maximum Lorentz force is obtained from FIG.
【００１０】[0010]
【表１】 [Table 1]
【００１１】表１から銅板厚みを知ると、ローレンツ力
の最大値を得る周波数を求めることができる。鋳型銅板
２５．０〜１５．０mmにおける各板厚の最大ローレンツ
力は２．０から４．０Hzの範囲であった。[0011] Knowing the copper plate thickness from Table 1, it is possible to obtain the frequency to obtain the maximum value of the Lorentz force. The maximum Lorentz force of each plate thickness in the mold copper plate 25.0 to 15.0 mm was in the range of 2.0 to 4.0 Hz.
【００１２】本発明は使用鋳型の選択時に鋳型銅板厚み
を実測して、最大ローレンツ力を得る周波数を特定し
た。本発明によって連続鋳造の電気効率は、従来例に比
して４〜５％低減した。According to the present invention, the frequency at which the maximum Lorentz force is obtained is specified by actually measuring the thickness of a copper mold plate when selecting a mold to be used. According to the present invention, the electric efficiency of continuous casting is reduced by 4 to 5% as compared with the conventional example.
【００１３】[0013]
【発明の効果】本発明においては鋳型銅板の厚みに応じ
た最適周波数で動作するため、連続鋳造における電気効
率が向上する。According to the present invention, since the device operates at the optimum frequency according to the thickness of the mold copper plate, the electric efficiency in continuous casting is improved.
【図１】本発明の説明図である。FIG. 1 is an explanatory diagram of the present invention.
【図２】本発明の作用のグラフである。FIG. 2 is a graph of the operation of the present invention.
【図３】周波数／ローレンツ力のグラフである。FIG. 3 is a graph of frequency / Lorentz force.
【図４】図３の部分拡大グラフである。FIG. 4 is a partially enlarged graph of FIG. 3;
【図５】従来例の説明図である。FIG. 5 is an explanatory diagram of a conventional example.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 福田 淳 君津市君津１番地 新日本製鐵株式会社 君津製鐵所内 (56)参考文献 特開 平１−228645（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) B22D 11/10 350 B22D 11/04 311 B22D 11/16 104 ──────────────────────────────────────────────────の Continuation of the front page (72) Inventor Jun Fukuda 1 Kimitsu, Kimitsu City Nippon Steel Corporation Kimitsu Works (56) References JP-A-1-228645 (JP, A) (58) Investigated Field (Int.Cl. 6 , DB name) B22D 11/10 350 B22D 11/04 311 B22D 11/16 104
Claims (2)
銅板厚みを実測して、銅板厚みに対応して前記電磁撹拌
機構の発生するローレンツ力が最大となる電源の動作周
波数を求め、該動作周波数の電流を電磁撹拌コイルに供
給することを特徴とする金属の連続鋳造方法。1. A method of measuring the thickness of a copper plate on a reference surface of a casting mold having an electromagnetic stirring mechanism, and measuring the electromagnetic stirring according to the thickness of the copper plate.
A method for continuously casting metal, comprising determining an operating frequency of a power supply at which a Lorentz force generated by a mechanism is maximized, and supplying a current at the operating frequency to an electromagnetic stirring coil.
鋳型銅板の厚みを測定することを特徴とする請求項１記
載の金属の連続鋳造方法。2. The continuous casting method for metal according to claim 1, wherein the thickness of the mold copper plate corresponding to the center level of the electromagnetic stirring coil is measured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5082221A JP2978356B2 (en) | 1993-04-08 | 1993-04-08 | Metal continuous casting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5082221A JP2978356B2 (en) | 1993-04-08 | 1993-04-08 | Metal continuous casting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06292956A JPH06292956A (en) | 1994-10-21 |
| JP2978356B2 true JP2978356B2 (en) | 1999-11-15 |
Family
ID=13768362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5082221A Expired - Lifetime JP2978356B2 (en) | 1993-04-08 | 1993-04-08 | Metal continuous casting method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2978356B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5018144B2 (en) * | 2007-03-09 | 2012-09-05 | Ｊｆｅスチール株式会社 | Steel continuous casting method |
| JP2011218408A (en) * | 2010-04-09 | 2011-11-04 | Nippon Steel Corp | Continuous casting method of metal |
-
1993
- 1993-04-08 JP JP5082221A patent/JP2978356B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06292956A (en) | 1994-10-21 |
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