JP2006150388A - Casting mold for continuous casting - Google Patents

Casting mold for continuous casting Download PDF

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JP2006150388A
JP2006150388A JP2004342839A JP2004342839A JP2006150388A JP 2006150388 A JP2006150388 A JP 2006150388A JP 2004342839 A JP2004342839 A JP 2004342839A JP 2004342839 A JP2004342839 A JP 2004342839A JP 2006150388 A JP2006150388 A JP 2006150388A
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molten steel
copper plate
cooling box
plate
mold
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JP4262193B2 (en
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Kunio Watanabe
久仁雄 渡邉
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Nippon Steel Corp
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Nippon Steel Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a casting mold for continuous casting in which a copper sheet can be easily changed without deteriorating its stiffness and electromagnetic stirring property. <P>SOLUTION: The casting mold for continuous casting has an electromagnetic stirring device 8 accommodated in a cooling box 1, and has a copper sheet fixing plate 3 and a copper sheet 5 attached to a front plate 2 on the molten steel A side of the cooling box 1 so as to be mounted and dismounted. The front plate 2 is formed with an opening 2a formed on only a portion inserting the tip end of a core 8b of the electromagnetic stirring device 8 on the molten steel side. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、鋳型内溶鋼を攪拌する電磁攪拌装置を収納した連続鋳造用鋳型に関する。   The present invention relates to a continuous casting mold containing an electromagnetic stirring device for stirring molten steel in a mold.

従来、連続鋳造用鋳型内に注入された溶鋼に含まれる非金属介在物あるいは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、鋳型内溶鋼を電磁攪拌する方法が知られており、それを行うための鋳型が特許文献１に開示されている。   Conventionally, a method of electromagnetically stirring molten steel in a mold in order to obtain slabs with excellent surface quality by actively floating and removing non-metallic inclusions or gas contained in molten steel injected into a continuous casting mold Is known, and a mold for doing so is disclosed in US Pat.

この特許文献１の鋳型では、その長辺冷却箱の上部に電磁攪拌装置のコイルを設け、コイル収納部の下部に冷却水の給水ヘッダーと排水ヘッダーを設けている。これにより、電磁攪拌装置を鋳型の上部に配置でき、鋳型内溶鋼上面と電磁攪拌装置のコイル上面を一致させることができるため、溶鋼攪拌が良好となり、表面品質の優れた鋳片を製造することが可能となった。   In the mold of Patent Document 1, a coil of an electromagnetic stirrer is provided in the upper part of the long side cooling box, and a cooling water supply header and a drainage header are provided in the lower part of the coil storage part. As a result, the electromagnetic stirring device can be arranged on the upper part of the mold, and the molten steel upper surface in the mold and the coil upper surface of the electromagnetic stirring device can be matched, so that the molten steel stirring becomes good and the slab having excellent surface quality is manufactured. Became possible.

また、特許文献１の鋳型では、冷却箱の溶鋼側前部板の表面には銅板を全面に張設し、この銅板に冷却水を通水することで冷却効果を高め、鋳型内に注入された溶鋼を冷却し凝固させる構造になっている。この銅板は、高温の溶鋼と常に接触するため、割れや溶損などの損傷が発生しやすく、損傷が発生したら他の銅板に交換する必要がある。   Further, in the mold of Patent Document 1, a copper plate is stretched over the entire surface of the molten steel side front plate of the cooling box, and the cooling effect is enhanced by passing cooling water through the copper plate, which is injected into the mold. The molten steel is cooled and solidified. Since this copper plate is always in contact with high-temperature molten steel, damage such as cracking or melting is likely to occur, and if damage occurs, it must be replaced with another copper plate.

しかし、特許文献１の鋳型では冷却箱と銅板が一体構造になっており、銅板を交換する場合には冷却箱と一体で交換する必要があるため、交換コストが高くなり、また、交換作業に時間がかかるという問題があった。   However, in the mold of Patent Document 1, the cooling box and the copper plate have an integral structure, and when replacing the copper plate, it is necessary to replace the cooling box integrally with the cooling box. There was a problem that it took time.

これに対して、特許文献２には、冷却水を通水する冷却溝を持つスペーサを冷却箱と銅板の間に着脱自在に装入して、銅板には冷却溝を設けないようにし、銅板を交換する場合は、スペーサを取り外すことで銅板も簡単に取り外すことができるようにした鋳型が開示されている。   On the other hand, in Patent Document 2, a spacer having a cooling groove for passing cooling water is detachably inserted between the cooling box and the copper plate so that the cooling groove is not provided on the copper plate. When exchanging the metal plate, a mold is disclosed in which the copper plate can be easily removed by removing the spacer.

しかし、特許文献２の鋳型では、スペーサを介在させることにより、溶鋼面と電磁攪拌装置の距離が大きくなるため、電磁攪拌能力が低下するという問題があった。   However, the mold of Patent Document 2 has a problem that the electromagnetic stirring ability is lowered because the distance between the molten steel surface and the electromagnetic stirring device is increased by interposing a spacer.

そこで、本願出願人は、特願２００３−２０５２５１において、電磁攪拌能力を低下させることなく銅板の交換を容易にできるようにした連続鋳造用鋳型を提案した。   Therefore, the applicant of the present application has proposed a continuous casting mold in Japanese Patent Application No. 2003-205251 in which the copper plate can be easily replaced without lowering the electromagnetic stirring ability.

図５は、本願出願人が特願２００３−２０５２５１において提案した連続鋳造用鋳型を示す縦断面図である。同図において、冷却箱１の溶鋼Ａ側には前部板２が溶接固定されており、この前部板２に銅板固定プレート３が複数のボルト４によって着脱可能に取り付けられ、銅板固定プレート３に銅板５がボルト（図示せず）によって固着されている。冷却水の給水ヘッダー６と排水ヘッダー７は、冷却箱１の下部に設けられており、冷却水は、給水ヘッダー６から、銅板固定プレート３の給水孔３ａを経由して銅板５の冷却溝５ａに流入し、銅板固定プレート３の排水孔３ｂを経由して排水ヘッダー７に排出される。   FIG. 5 is a longitudinal sectional view showing a continuous casting mold proposed by the present applicant in Japanese Patent Application No. 2003-205251. In the figure, a front plate 2 is welded and fixed to the molten steel A side of the cooling box 1, and a copper plate fixing plate 3 is detachably attached to the front plate 2 by a plurality of bolts 4. The copper plate 5 is fixed to the board with bolts (not shown). The cooling water supply header 6 and the drainage header 7 are provided in the lower part of the cooling box 1, and the cooling water is supplied from the water supply header 6 through the water supply hole 3 a of the copper plate fixing plate 3 to the cooling groove 5 a of the copper plate 5. And is discharged to the drainage header 7 via the drainage hole 3 b of the copper plate fixing plate 3.

また、冷却箱１内には電磁攪拌装置８が収納されており、そのコイル８ａの前面が溶鋼Ａに接近するように前部板２に開口部２ａを設け、この開口部２ａにコイル８ａの前面（溶鋼Ａ側）を挿通させて配置している。冷却箱１の後面側（溶鋼Ａと反対側）も開口しており、その開口端に電磁攪拌装置８がボルト９によって固定されている。   In addition, an electromagnetic stirring device 8 is accommodated in the cooling box 1, and an opening 2a is provided in the front plate 2 so that the front surface of the coil 8a approaches the molten steel A, and the opening 2a is provided with the coil 8a. The front surface (molten steel A side) is inserted and arranged. The rear side of the cooling box 1 (the side opposite to the molten steel A) is also open, and an electromagnetic stirring device 8 is fixed to the opening end by a bolt 9.

以上のように、図５の連続鋳造用鋳型では、前部板２に設けた開口部２ａにコイル８ａの前面を挿通させて配置しているので、コイル８ａと溶鋼Ａとの距離を小さくでき、十分な電磁攪拌能力を確保できる。また、銅板５を固着した銅板固定プレート３は、前部板２に着脱可能に取り付けられているので、銅板５と銅板固定プレート３のみを容易に交換することができる。   As described above, in the continuous casting mold shown in FIG. 5, the distance between the coil 8a and the molten steel A can be reduced because the front surface of the coil 8a is inserted through the opening 2a provided in the front plate 2. Sufficient electromagnetic stirring ability can be secured. Moreover, since the copper plate fixing plate 3 to which the copper plate 5 is fixed is detachably attached to the front plate 2, only the copper plate 5 and the copper plate fixing plate 3 can be easily exchanged.

しかし、図５の連続鋳造用鋳型では、冷却箱１の溶鋼Ａ側の前部板２に開口部２ａを設け、また、冷却箱１の後面側も開口しているので、冷却箱１の剛性が低下して銅板５の変形が大きくなり、鋳片品質の低下等を招くという問題があった。
実公昭５８−４９１７２号公報 特開平９−２６２６４２号公報 However, in the continuous casting mold of FIG. 5, the opening 2 a is provided in the front plate 2 on the molten steel A side of the cooling box 1 and the rear side of the cooling box 1 is also open. However, there is a problem that the deformation of the copper plate 5 is increased and the slab quality is deteriorated.
Japanese Utility Model Publication No. 58-49172 Japanese Patent Laid-Open No. 9-262642

本発明が解決しようとする課題は、剛性及び電磁撹拌能力を低下させることなく銅板の交換を容易にできる連続鋳造用鋳型を提供することにある。   The problem to be solved by the present invention is to provide a continuous casting mold capable of easily replacing a copper plate without reducing rigidity and electromagnetic stirring ability.

本発明は、冷却箱内に電磁撹拌装置を収納し、前記冷却箱の溶鋼側の前部板に銅板固定プレート及び銅板を着脱可能に取り付ける連続鋳造用鋳型において、前記前部板には、前記電磁攪拌装置のコアの溶鋼側先端を挿通する部分にのみ開口部を設けたことを特徴とする。   In the continuous casting mold in which the electromagnetic stirrer is housed in the cooling box and the copper plate fixing plate and the copper plate are detachably attached to the front plate on the molten steel side of the cooling box, the front plate includes the An opening is provided only in a portion where the molten steel side tip of the core of the electromagnetic stirring device is inserted.

本発明の連続鋳造用鋳型では、前部板に設けた開口部はコアの溶鋼側先端が挿通するだけの開口とし、この開口部にコアの溶鋼側先端のみを挿通させて配置しているで、電磁攪拌力を発生させるコアと溶鋼との距離を小さくでき、十分な電磁撹拌能力を確保できるとともに、銅板を固着した銅板固定プレートを前部板に着脱可能に取り付けているので、銅板と固着した銅板固定プレートのみを容易に交換することができる。さらに、冷却箱の前面側の開口部を必要最小限にしたため、冷却箱の剛性低下を最小限に抑えることができ、銅板変形の増大を防止できる。   In the continuous casting mold of the present invention, the opening provided in the front plate is an opening through which the molten steel side tip of the core is inserted, and only the molten steel side tip of the core is inserted into this opening. The distance between the core that generates electromagnetic stirring force and the molten steel can be reduced, sufficient electromagnetic stirring ability can be secured, and the copper plate fixing plate to which the copper plate is fixed is detachably attached to the front plate, so that the copper plate is fixed. Only the fixed copper plate can be easily replaced. Furthermore, since the opening on the front side of the cooling box is minimized, it is possible to minimize the decrease in rigidity of the cooling box and to prevent an increase in deformation of the copper plate.

図１は本発明の一実施例を示す縦断面図、図２は図１のＸ−Ｘ矢視図、図３は図２のＹ−Ｙ矢視図、図４は図２のＺ−Ｚ矢視図である。   1 is a longitudinal sectional view showing an embodiment of the present invention, FIG. 2 is a view taken along the line XX in FIG. 1, FIG. 3 is a view taken along the line Y-Y in FIG. 2, and FIG. It is an arrow view.

図１において、冷却箱１の溶鋼Ａ側には前部板２が溶接固定されており、この前部板２に銅板固定プレート３が複数のボルト４によって着脱可能に取り付けられ、銅板固定プレート３に銅板５がボルト（図示せず）によって固定されている。冷却水の給水ヘッダー６と排水ヘッダー７は、冷却箱１の下部に設けられており、冷却水は給水ヘッダー６から、銅板固定プレート３の給水孔３ａを経由して銅板５の冷却溝５ａに流入し、銅板固定プレート３の排水孔３ｂを経由して排水ヘッダー７に排出される。   In FIG. 1, a front plate 2 is welded and fixed to the molten steel A side of the cooling box 1, and a copper plate fixing plate 3 is detachably attached to the front plate 2 by a plurality of bolts 4. The copper plate 5 is fixed by bolts (not shown). The cooling water supply header 6 and the drainage header 7 are provided in the lower part of the cooling box 1, and the cooling water passes from the water supply header 6 to the cooling groove 5 a of the copper plate 5 through the water supply hole 3 a of the copper plate fixing plate 3. It flows into the drainage header 7 via the drainage hole 3 b of the copper plate fixing plate 3.

また、冷却箱１内には電磁撹拌装置８のコイル８ａが収納されており、そのコイル８ａのコア８ｂの前面（溶鋼側先端）が溶鋼Ａに接近するように、前部板２にコア８ｂの溶鋼側先端が挿入できる大きさの開口部２ａを設け、この開口部２ａにコア８ｂの溶鋼側先端を挿通させて配置している。   The coil 8a of the electromagnetic stirring device 8 is housed in the cooling box 1, and the front plate 2 has a core 8b on the front plate 2 so that the front surface (molten steel side tip) of the coil 8a approaches the molten steel A. An opening 2a is provided in such a size that the molten steel side tip can be inserted, and the molten steel side tip of the core 8b is inserted through the opening 2a.

図２及び図４からわかるように、コイル８ａは、鋳型の長辺方向に沿って複数配置されており、これに対応して、コア８ｂの溶鋼側先端を挿通する開口部２ａも鋳型の長辺方向に沿って複数配置されている。そして、図２及び図４から明らかなように、開口部２ａは、コア８ｂの溶鋼側先端を挿通する部分にのみ設けられている。   As can be seen from FIGS. 2 and 4, a plurality of coils 8a are arranged along the long side direction of the mold. Correspondingly, the opening 2a through which the molten steel side tip of the core 8b is inserted is also the length of the mold. A plurality are arranged along the side direction. As is clear from FIGS. 2 and 4, the opening 2a is provided only at the portion through which the molten steel side tip of the core 8b is inserted.

電磁撹拌装置８は、冷却箱１の後面側（溶鋼Ａと反対側）の開口端にボルト９によって固定される。なお、本実施例では、銅板固定プレート３に凹部３ｃを形成し、コア８ｂの溶鋼側先端を溶鋼Ａにさらに近接させるようにしている。   The electromagnetic stirring device 8 is fixed to the opening end of the rear surface side (opposite side of the molten steel A) by the bolt 9. In the present embodiment, the recess 3c is formed in the copper plate fixing plate 3, and the molten steel side tip of the core 8b is further brought closer to the molten steel A.

このように配置することにより、電磁力はコア８ｂの溶鋼側先端から出るので、コア８ｂの溶鋼側先端が挿通できるだけの開口部２ａを前部板２に設けて、コア８ｂの溶鋼側先端と溶鋼Ａの距離を小さくすれば、溶鋼Ａに十分に電磁力を作用させることができ、かつ、前部板２の開口面積も極力小さくできるので、前部板２の剛性の低下を抑えることができ、銅板の過大変形を防止でき鋳片品質低下を招くこともない。   By arranging in this way, electromagnetic force comes out from the molten steel side tip of the core 8b. Therefore, an opening 2a through which the molten steel side tip of the core 8b can be inserted is provided in the front plate 2, and the molten steel side tip of the core 8b and If the distance of the molten steel A is reduced, the electromagnetic force can be sufficiently applied to the molten steel A, and the opening area of the front plate 2 can be reduced as much as possible, so that the decrease in rigidity of the front plate 2 can be suppressed. It is possible to prevent excessive deformation of the copper plate and not to deteriorate the quality of the slab.

本発明の一実施例を示す縦断面図である。It is a longitudinal cross-sectional view which shows one Example of this invention. 図１のＸ−Ｘ矢視図である。It is a XX arrow line view of FIG. 図２のＹ−Ｙ矢視図である。It is a YY arrow line view of FIG. 図２のＺ−Ｚ矢視図である。It is a ZZ arrow line view of FIG. 従来の連続鋳造用鋳型を示す縦断面図である。It is a longitudinal cross-sectional view which shows the conventional casting mold for continuous casting.

符号の説明Explanation of symbols

１ 冷却箱
１ａ フランジ
２ 前部板
２ａ 開口部
３ 銅板固定プレート
３ａ 給水孔
３ｂ 排水孔
３ｃ 凹部
４ ボルト
５ 銅板
６ 給水ヘッダー
７ 排水ヘッダー
８ 電磁攪拌装置
８ａ コイル
８ｂ コア
９ ボルト
Ａ 溶鋼
DESCRIPTION OF SYMBOLS 1 Cooling box 1a Flange 2 Front plate 2a Opening 3 Copper plate fixed plate 3a Water supply hole 3b Drainage hole 3c Recessed part 4 Bolt 5 Copper plate 6 Water supply header 7 Drainage header 8 Electromagnetic stirrer 8a Coil 8b Core 9 Bolt A Molten steel

Claims (1)

冷却箱内に電磁攪拌装置を収納し、前記冷却箱の溶鋼側の前部板に銅板固定プレート及び銅板を着脱可能に取り付ける連続鋳造用鋳型において、前記前部板には、前記電磁攪拌装置のコアの溶鋼側先端を挿通する部分にのみ開口部を設けたことを特徴とする連続鋳造用鋳型。   In a continuous casting mold in which an electromagnetic stirrer is housed in a cooling box and a copper plate fixing plate and a copper plate are detachably attached to a front plate on the molten steel side of the cooling box, the front plate includes the electromagnetic stirrer. A casting mold for continuous casting, wherein an opening is provided only in a portion through which the molten steel side tip of the core is inserted.
JP2004342839A 2004-11-26 2004-11-26 Continuous casting mold Active JP4262193B2 (en)

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JP4262193B2 JP4262193B2 (en) 2009-05-13

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009068300A1 (en) * 2007-11-29 2009-06-04 Sms Siemag Ag Brake/stirring coil arrangement on strand casting molds
CN109746404A (en) * 2019-03-08 2019-05-14 石家庄爱迪尔电气有限公司 A kind of convenient for safeguarding and processing electromagnetic agitation Casting Equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009068300A1 (en) * 2007-11-29 2009-06-04 Sms Siemag Ag Brake/stirring coil arrangement on strand casting molds
CN109746404A (en) * 2019-03-08 2019-05-14 石家庄爱迪尔电气有限公司 A kind of convenient for safeguarding and processing electromagnetic agitation Casting Equipment
CN109746404B (en) * 2019-03-08 2021-05-18 石家庄爱迪尔电气有限公司 Electromagnetic stirring casting equipment convenient to maintain and process

Also Published As

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