JP3814208B2 - Electromagnetic stirring device for continuous casting and electromagnetic stirring method - Google Patents
Electromagnetic stirring device for continuous casting and electromagnetic stirring method Download PDFInfo
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- JP3814208B2 JP3814208B2 JP2002047521A JP2002047521A JP3814208B2 JP 3814208 B2 JP3814208 B2 JP 3814208B2 JP 2002047521 A JP2002047521 A JP 2002047521A JP 2002047521 A JP2002047521 A JP 2002047521A JP 3814208 B2 JP3814208 B2 JP 3814208B2
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- electromagnetic
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Description
【発明の属する技術分野】
【０００１】
本発明は、連続鋳造機の鋳型内の溶鋼を撹拌するための連続鋳造用電磁撹拌装置および電磁撹拌方法に関する。
【０００２】
【従来の技術】
従来から、連続鋳造機の鋳型内に注入された溶鋼に含まれている非金属介在物やガスを積極的に浮上させて除去し、表面品質の優れた鋳片を得るために、鋳型内の溶鋼を電磁撹拌する方法が知られており、例えば、特開昭５４−４２４１号公報などに開示されている。
【０００３】
図３は、従来の連続鋳造用電磁撹拌装置を示す図である。
図３のタンディッシュ１３内の溶鋼はタンディッシュの下部から鋳型３内に注入され、鋳造されて鋳片となる。
鋳型３の外側には電磁撹拌装置１４が設置されており、これによって移動磁界を発生させて鋳型３内の溶鋼が撹拌されることにより、溶鋼内の非金属介在物やガスが浮上し、これを除去することによって、良質な鋳片を得ることができる。この電磁撹拌装置によって表面品質の優れた鋳片を得るためには、電磁撹拌装置の電磁コイル１４を鋳型３内の溶鋼の表面にできるだけ近接させて溶鋼の表面まで撹拌することが必要であるため、鋳型３の溶鋼面の反対側に鋳型３の長さおよび高さ方向のほぼ全域にわたって電磁コイル１４が固定設置されている。
【０００４】
しかし、従来の連続鋳造用電磁撹拌装置は、鋳込み床から鋳型を交換する場合、電磁撹拌装置も同時に交換する構造になっていたので、予備の鋳型と交換する場合には予備鋳型にも同様の電磁コイルを設置しておく必要があった。
すなわち、従来の電磁撹拌装置は、鋳込み床に設置された鋳型と、交換する予備の鋳型の双方に、電磁コイルを設置する必要があった。
このため、鋳造による鋳型の表面の損傷を修復するために複数の予備の鋳型を保有する必要があり、従って鋳型と同数の電磁コイルが必要であり、設備費が高く、また、電磁コイルを取り付ける手間がかかるという問題点があった。
【０００５】
このような問題点を解決する方法として、特開２００１−３４０９４２号公報の図４に、電磁撹拌装置移動手段を設けることにより、モールドカセット（鋳型）の交換時には、電磁撹拌装置を傾動させて退避させることによりモールドカセットから脱着可能にすることによってモールドカセットだけを交換する電磁撹拌装置が開示されている。
しかし、この装置は特開２００１−３４０９４２号公報の図４に示されるように大重量の電磁撹拌装置を傾動させる機構が複雑であって信頼性に欠け、長期安定操業の必要な連続鋳造設備には適さないという問題点があった。
また、この従来技術によると、電磁撹拌装置の傾動時に電磁撹拌装置の上部に十分な空間を確保する必要があった。
【０００６】
【発明が解決しようとする課題】
本発明は、前述のような従来技術の問題点を解決し、予備の鋳型に電磁コイルを設置する必要がない連続鋳造用電磁撹拌装置および電磁撹拌方法を提供することを課題とする。
【０００７】
【課題を解決するための手段】
本発明は、鋳込み床上を水平にのみ移動するコイル台車を設けることにより、電磁コイルを退避させた状態で鋳型の交換ができる連続鋳造用電磁撹拌装置および電磁撹拌方法を提供するものであり、その要旨は特許請求の範囲に記載された通りの下記の内容である。
【０００８】
（１）連続鋳造機の鋳型内の溶鋼に移動磁界をかけて該溶鋼を撹拌する連続鋳造用電磁撹拌装置において、鋳型背面に固定設置されたコイルであって電磁撹拌に用いる電磁コイルを、前記鋳型の背面から鋳込み床上を水平のみに移動させるコイル台車を用いて鋳込み床に退避させ、該電磁コイルを鋳込み床に残した状態で鋳型の交換ができることを特徴とする連続鋳造用電磁撹拌装置。
（２）連続鋳造機の鋳型内の溶鋼に移動磁界をかけて該溶鋼を撹拌する連続鋳造用電磁撹拌方法において、鋳型背面に固定設置されたコイルであって電磁撹拌に用いる電磁コイルを、前記鋳型の背面から鋳込み床上を水平のみに移動させることにより鋳込み床に退避させ、該電磁コイルを鋳込み床に残した状態で鋳型を交換することを特徴とする連続鋳造用電磁撹拌方法。
【０００９】
【発明の実施の形態】
本発明における電磁撹拌装置および電磁撹拌方法の実施形態を図１および図２により詳細に説明する。
図１は、本発明における電磁撹拌装置の側面断面図である。
鋳造時は、電磁コイル６は溶鋼４を鋳込む鋳型３の背面の両側に設置されたコイル収容室１の内部に設置され、コイル収容室１の下部には、鋳型を冷却する冷却水を給排水する、給水室８と排水室９が設置されている。
電磁コイル６は溶鋼４に接近させて設置することにより、移動磁界にて溶鋼４を撹拌できる構成となっている。
鋳型３の交換時はコイル収容室側壁２を開放し電磁コイル６の下面に設置したコイル台車１１にて電磁コイル６を、鋳込み床１２上を溶鋼３の反対方向側に水平に退避する構造にし、電磁コイル６が退避した後に、コイル収容室側壁２を閉じることにより、コイル収容室１と鋳型３を上方に抜き出すことができる構造となっている。
本発明の電磁撹拌装置における電磁コイルの退避機構は、電磁コイル６の水平移動のみの構造なので、電磁コイル移動機構が非常に簡易となり、長期安定操業が可能である。
また、電磁コイル６を水平移動させるので、大重量の電磁コイルを傾動させる必要がなく、電磁コイルの上部の空間は不要となり、整備性も良好である。
【００１０】
一方、予備の鋳型３とコイル収容室１は、コイル収容室１と鋳型３とを抜き出した後、これと交換して設置される。
次に、電磁コイル収容室側壁２を開放しコイル台車１１を再び溶鋼方向に移動させ、電磁コイル６を鋳型背面に固定設置し、コイル収容室側壁２を閉じる。
このような設備構成とすることによって、予備の鋳型３とコイル収容室１には予備コイルを設置する必要がない。
図２は、本発明の実施形態における電磁撹拌装置を示す図１のＡ−Ａ矢視平面図である。溶鋼４は、電磁コイル６が発生させる移動磁界によって矢印の方向に回転・撹拌される。
【００１１】
【発明の効果】
以上のように、本発明の電磁撹拌装置および電磁撹拌方法は、鋳込み床に設置された鋳型と電磁撹拌コイル収容室を交換するときに電磁撹拌コイルを鋳型背面から鋳型とコイル収容室との干渉がなくなる位置に水平移動することによって電磁撹拌コイルを鋳込み床に残すことができるので、交換する予備の電磁撹拌コイルを除く鋳型と電磁撹拌コイルだけを交換することによって、予備の鋳型に電磁撹拌コイルを設置する必要がなく、しかも、簡易な設備構成が実現でき整備性も良好であるなど、産業上有用な著しい効果を奏する。
【図面の簡単な説明】
【図１】 本発明における電磁撹拌装置の側面断面図である。
【図２】 本発明の実施形態における電磁撹拌装置を示す図１のＡ−Ａ矢視平面図である。
【図３】 従来の連続鋳造用電磁撹拌装置の概要を示す図である。
【符号の説明】
１：コイル収容室
２：コイル収容装置側壁
３：鋳型
４：溶鋼
５：側板
６：電磁コイル
７：電磁コイル保持具
８：給水室
９：排水室
１０：鋳片
１１：コイル台車
１２：鋳込み床BACKGROUND OF THE INVENTION
[0001]
The present invention relates to an electromagnetic stirring device for continuous casting and an electromagnetic stirring method for stirring molten steel in a mold of a continuous casting machine.
[0002]
[Prior art]
Conventionally, in order to obtain slabs with excellent surface quality, non-metallic inclusions and gas contained in molten steel injected into the mold of a continuous casting machine are actively levitated and removed. A method of electromagnetically stirring molten steel is known, and is disclosed, for example, in JP-A No. 54-4241.
[0003]
FIG. 3 is a view showing a conventional electromagnetic stirring device for continuous casting.
The molten steel in the
An
[0004]
However, the conventional magnetic stirrer for continuous casting has a structure in which the magnetic stirrer is also replaced at the same time when the mold is replaced from the casting floor. It was necessary to install an electromagnetic coil.
That is, in the conventional electromagnetic stirring device, it is necessary to install electromagnetic coils in both the mold installed on the casting floor and the spare mold to be replaced.
For this reason, it is necessary to have a plurality of spare molds in order to repair the damage of the mold surface due to casting. Therefore, the same number of electromagnetic coils as the molds are necessary, the equipment cost is high, and the electromagnetic coils are attached. There was a problem that it took time and effort.
[0005]
As a method for solving such a problem, by providing an electromagnetic stirring device moving means in FIG. 4 of Japanese Patent Laid-Open No. 2001-340942, when replacing the mold cassette (mold), the electromagnetic stirring device is tilted and retracted. An electromagnetic stirring device is disclosed in which only the mold cassette is exchanged by making it removable from the mold cassette.
However, as shown in FIG. 4 of Japanese Patent Laid-Open No. 2001-340942, this device has a complicated mechanism for tilting a heavy electromagnetic stirrer, lacks reliability, and is a continuous casting facility that requires long-term stable operation. There was a problem that was not suitable.
Moreover, according to this prior art, it was necessary to ensure sufficient space above the electromagnetic stirring device when the electromagnetic stirring device was tilted.
[0006]
[Problems to be solved by the invention]
An object of the present invention is to solve the above-mentioned problems of the prior art and to provide an electromagnetic stirring device for continuous casting and an electromagnetic stirring method that do not require an electromagnetic coil to be installed in a spare mold.
[0007]
[Means for Solving the Problems]
The present invention provides an electromagnetic stirring device for continuous casting and an electromagnetic stirring method capable of exchanging a mold in a state where an electromagnetic coil is retracted by providing a coil carriage that moves only horizontally on a casting floor. The gist is the following contents as described in the claims.
[0008]
(1) in a continuous casting machine electromagnetic stirrer for continuous casting to stir the solution steels over a moving magnetic field in the molten steel in the mold of an electromagnetic coil for use in magnetic stirring a fixedly installed coil mold back, the An electromagnetic stirrer for continuous casting, characterized in that the casting mold can be exchanged in a state where the electromagnetic coil is left on the casting floor using a coil carriage that moves only on the casting floor horizontally from the back of the casting mold.
(2) An electromagnetic stirring method for continuous casting of molten steel in the mold by applying a shifting magnetic field to agitate the solution steel continuous casting machine, the electromagnetic coils used for magnetic stirring a fixedly installed coil mold back, the An electromagnetic stirring method for continuous casting, characterized in that the casting is retreated to the casting floor by moving only on the casting floor horizontally from the back of the casting mold, and the casting mold is exchanged while the electromagnetic coil is left on the casting floor .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of an electromagnetic stirring device and an electromagnetic stirring method in the present invention will be described in detail with reference to FIGS.
FIG. 1 is a side sectional view of an electromagnetic stirring device according to the present invention.
At the time of casting, the electromagnetic coil 6 is installed inside the coil housing chamber 1 installed on both sides of the back surface of the mold 3 into which the molten steel 4 is cast, and cooling water for cooling the mold is supplied and drained to the lower portion of the coil housing chamber 1. A
The electromagnetic coil 6 is configured to be able to stir the molten steel 4 with a moving magnetic field by being placed close to the molten steel 4.
When exchanging the mold 3, the coil housing
Since the retracting mechanism of the electromagnetic coil in the electromagnetic stirring device of the present invention is a structure that only moves the electromagnetic coil 6 horizontally, the electromagnetic coil moving mechanism becomes very simple and long-term stable operation is possible.
Further, since the electromagnetic coil 6 is moved horizontally, it is not necessary to tilt the heavy electromagnetic coil, the space above the electromagnetic coil is unnecessary, and the maintainability is good.
[0010]
On the other hand, the spare mold 3 and the coil housing chamber 1 are installed after the coil housing chamber 1 and the mold 3 are extracted and replaced.
Next, the electromagnetic coil housing
By adopting such an equipment configuration, it is not necessary to install spare coils in the spare mold 3 and the coil housing chamber 1.
FIG. 2 is a plan view taken along the line AA of FIG. The molten steel 4 is rotated and stirred in the direction of the arrow by the moving magnetic field generated by the electromagnetic coil 6.
[0011]
【The invention's effect】
As described above, the electromagnetic stirrer and the electromagnetic stirrer method according to the present invention allow the electromagnetic stir coil to interfere with the mold and the coil storage chamber from the back of the mold when exchanging the mold and the electromagnetic stir coil storage chamber installed on the casting floor. Since the electromagnetic stirring coil can be left in the casting floor by moving horizontally to the position where there is no longer any problem, the electromagnetic stirring coil is replaced with the spare mold by replacing only the mold and the electromagnetic stirring coil except the spare electromagnetic stirring coil to be replaced. There is no need to install the system, and a simple equipment configuration can be realized and maintainability is good.
[Brief description of the drawings]
FIG. 1 is a side sectional view of an electromagnetic stirring device according to the present invention.
FIG. 2 is a plan view taken along the line AA of FIG.
FIG. 3 is a diagram showing an outline of a conventional electromagnetic stirring device for continuous casting.
[Explanation of symbols]
1: Coil housing chamber 2: Coil housing device side wall 3: Mold 4: Molten steel 5: Side plate 6: Electromagnetic coil 7: Electromagnetic coil holder 8: Water supply chamber 9: Drainage chamber 10: Cast slab 11: Coil carriage 12: Cast-in floor
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002047521A JP3814208B2 (en) | 2002-02-25 | 2002-02-25 | Electromagnetic stirring device for continuous casting and electromagnetic stirring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002047521A JP3814208B2 (en) | 2002-02-25 | 2002-02-25 | Electromagnetic stirring device for continuous casting and electromagnetic stirring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003245754A JP2003245754A (en) | 2003-09-02 |
| JP3814208B2 true JP3814208B2 (en) | 2006-08-23 |
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|---|---|---|---|
| JP2002047521A Expired - Fee Related JP3814208B2 (en) | 2002-02-25 | 2002-02-25 | Electromagnetic stirring device for continuous casting and electromagnetic stirring method |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007216262A (en) * | 2006-02-16 | 2007-08-30 | Nippon Steel Corp | Device and method for attaching / detaching electromagnetic stirring device in mold |
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2002
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| JP2003245754A (en) | 2003-09-02 |
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