JP7072388B2 - Mold for continuous casting - Google Patents

Mold for continuous casting Download PDF

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JP7072388B2
JP7072388B2 JP2018003691A JP2018003691A JP7072388B2 JP 7072388 B2 JP7072388 B2 JP 7072388B2 JP 2018003691 A JP2018003691 A JP 2018003691A JP 2018003691 A JP2018003691 A JP 2018003691A JP 7072388 B2 JP7072388 B2 JP 7072388B2
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pair
long side
side member
side members
adjusting means
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JP2019122971A (en
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和磨 太田
健 関
将也 田窪
正信 葉山
修至 脇田
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Nippon Steel Corp
Nippon Steel Engineering Co Ltd
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Nippon Steel Engineering Co Ltd
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Description

本発明は、互いに対向する一対の長辺部材と、これら一対の長辺部材に挟持されるとともに互いに対向する一対の短辺部材と、電磁ブレーキ装置と、一対の前記長辺部材の間の間隔を調整する長辺部材間隔調整手段と、を有する連続鋳造用鋳型に関するものである。 In the present invention, the distance between a pair of long side members facing each other, a pair of short side members sandwiched between the pair of long side members and facing each other, an electromagnetic brake device, and the pair of long side members. It relates to a mold for continuous casting having a long side member spacing adjusting means for adjusting.

断面矩形の鋳片を製造する連続鋳造装置においては、一対の長辺部材と一対の短辺部材とを備えた連続鋳造用鋳型を用いて、この連続鋳造用鋳型の鋳造空間内に浸漬ノズルを用いて溶鋼を供給し、鋳型内で溶鋼を冷却して凝固シェルを成長させ、鋳片を連続的に鋳造する構成とされている。
鋳型内における鋼鋳片への非金属介在物の持ち込みを防止するため、鋳造空間内に供給される溶鋼に対してアルゴンガス等の不活性ガスを吹き込んでいる。
また、鋳造空間内の溶鋼の上には、溶鋼の保温及び凝固シェルと長辺部材及び短辺部材との間の潤滑性を確保するために、鋳造パウダーが供給される。
In a continuous casting apparatus for producing a slab having a rectangular cross section, a continuous casting mold having a pair of long side members and a pair of short side members is used, and a dipping nozzle is placed in the casting space of the continuous casting mold. The molten steel is supplied using the metal, the molten steel is cooled in the mold to grow a solidified shell, and the slabs are continuously cast.
In order to prevent non-metal inclusions from being brought into the steel slab in the mold, an inert gas such as argon gas is blown into the molten steel supplied into the casting space.
Further, casting powder is supplied onto the molten steel in the casting space in order to keep the molten steel warm and to ensure the lubricity between the solidified shell and the long side member and the short side member.

このとき、吹き込まれるアルゴンガスの気泡、鋳造パウダー及び介在物等が、浸漬ノズルからの吐出流によって鋳造空間内の下方位置にまで混入することがある。この場合、凝固シェルが十分に成長した位置で、これら気泡、鋳造パウダー及び介在物等が捕捉されるため、鋳片の内部欠陥の一因となる。
この鋳片内部での巻き込みを防止する手段として、例えば、特許文献1~3に示すように、鋳型の下方側に電磁ブレーキ装置を配設し、溶鋼の流れを制御する方法が提案されている。
At this time, bubbles of argon gas blown in, casting powder, inclusions, and the like may be mixed into the lower position in the casting space due to the discharge flow from the immersion nozzle. In this case, these bubbles, casting powder, inclusions, and the like are captured at the position where the solidified shell is sufficiently grown, which contributes to internal defects of the slab.
As a means for preventing entrainment inside the slab, for example, as shown in Patent Documents 1 to 3, a method of disposing an electromagnetic brake device on the lower side of the mold to control the flow of molten steel has been proposed. ..

上述の電磁ブレーキ装置は、一対の長辺部材とともに互いに対向するように配置された一対のコアと、これらのコアの外周側にそれぞれ捲回された一対のコイルと、を備えている。
電磁ブレーキ装置を用いた場合には、浸漬ノズルから吐出された鋳造空間内の下方側へ向かう溶鋼の流速を抑制することができ、気泡、鋳造パウダー及び介在物等が鋳型の下方側へと混入することを抑制し、鋳片の内部への非金属介在物及び気泡の巻き込みを低減することが可能となる。
The above-mentioned electromagnetic braking device includes a pair of cores arranged so as to face each other together with a pair of long side members, and a pair of coils wound around the outer peripheral side of these cores.
When an electromagnetic brake device is used, the flow velocity of the molten steel toward the lower side in the casting space discharged from the immersion nozzle can be suppressed, and air bubbles, casting powder, inclusions, etc. are mixed into the lower side of the mold. It is possible to suppress this and reduce the entrainment of non-metal inclusions and air bubbles inside the slab.

ところで、上述の連続鋳造用鋳型においては、例えば特許文献3に示すように、連続鋳造装置に連続鋳造用鋳型を取り付けた状態で(オンラインで)、鋳造する鋳片の厚さを変更するために、一対の長辺部材の一方を移動可能な構成とし、一対の長辺部材の間隔を広げて、短辺部材を交換可能としたものが提案されている。
そして、この特許文献3においては、一方の長辺部材を移動させて短辺部材を交換する際の作業スペースを確保するために、電磁ブレーキ装置の一対のコアの一方を移動させて、長辺部材とコアとの距離を調整する駆動部を設けている。
By the way, in the above-mentioned continuous casting mold, for example, as shown in Patent Document 3, in order to change the thickness of the slab to be cast with the continuous casting mold attached to the continuous casting apparatus (online). , A structure has been proposed in which one of a pair of long-side members is movable, and the distance between the pair of long-side members is widened so that the short-side members can be exchanged.
Then, in Patent Document 3, in order to secure a work space for moving one of the long side members to replace the short side member, one of the pair of cores of the electromagnetic brake device is moved to move the long side. A drive unit for adjusting the distance between the member and the core is provided.

実開昭62-067649号公報Jikkai Sho 62-67649 Gazette 特表2005-520690号公報Japanese Patent Publication No. 2005-520690 特開2009-214143号公報Japanese Unexamined Patent Publication No. 2009-214143

ところで、上述の電磁ブレーキ装置においては、鋳造空間内の溶鋼に対して電磁力を十分に作用させる必要がある。ここで、短辺部材を交換して鋳片の厚みを変更した場合には、電磁ブレーキ装置のコア及びコイルと、鋳造空間内の溶鋼との相対距離が変化してしまい、鋳造空間内の溶鋼に対して効率良く電磁力を作用させることができず、電磁ブレーキ装置による鋳片の内部への非金属介在物及び気泡の巻き込み防止効果が低減してしまうおそれがあった。 By the way, in the above-mentioned electromagnetic braking device, it is necessary to sufficiently apply an electromagnetic force to the molten steel in the casting space. Here, if the short side member is replaced to change the thickness of the slab, the relative distance between the core and coil of the electromagnetic brake device and the molten steel in the casting space changes, and the molten steel in the casting space changes. However, the electromagnetic force could not be applied efficiently, and the effect of preventing the entrainment of non-metal inclusions and air bubbles in the slab by the electromagnetic braking device may be reduced.

本発明は、前述した状況に鑑みてなされたものであって、一対の長辺部材の間隔を調整して短辺部材を交換し、製造する鋳片の厚みを変更した場合であっても、電磁ブレーキ装置による電磁力を効率的に溶鋼に作用させることができ、電磁ブレーキ装置による鋳片の内部への非金属介在物及び気泡の巻き込み防止効果を十分に奏功せしめることが可能な連続鋳造用鋳型を提供することを目的とする。 The present invention has been made in view of the above-mentioned situation, and even when the distance between the pair of long side members is adjusted to replace the short side members and the thickness of the slab to be manufactured is changed. For continuous casting, the electromagnetic force of the electromagnetic brake device can be efficiently applied to the molten steel, and the effect of the electromagnetic brake device to prevent non-metal inclusions and air bubbles from being entrained inside the slab can be fully achieved. The purpose is to provide a mold.

上記課題を解決するために、本発明者らが鋭意検討し、磁場解析を行った結果、鋳片の厚みが変更された場合であっても、電磁ブレーキ装置の一対のコイルの間隔を適正化することによって、鋳造空間内の溶鋼に対して電磁力を効率的に作用させることが可能であるとの知見を得た。 In order to solve the above problems, the present inventors diligently studied and analyzed the magnetic field, and as a result, even when the thickness of the slab was changed, the distance between the pair of coils of the electromagnetic braking device was optimized. By doing so, it was found that the electromagnetic force can be efficiently applied to the molten steel in the casting space.

本発明は、上述の知見に基づいてなされたものであって、本発明に係る連続鋳造用鋳型は、互いに対向する一対の長辺部材と、これら一対の長辺部材に挟持されるとともに互いに対向する一対の短辺部材と、電磁ブレーキ装置と、一対の前記長辺部材の間隔を調整する長辺部材間隔調整手段と、を有し、一対の前記長辺部材と一対の前記短辺部材とによって鋳造空間が形成され、前記長辺部材の背面の下方部分には、前記鋳造空間側に向かって凹んだ凹部が形成されており、前記電磁ブレーキ装置は、一対の前記長辺部材とともに対向配置された一対のコアと、これらコアの周囲にそれぞれ捲回された一対のコイルと、を備えており、前記コアは、その後端部分が支持され、その先端部分が前記長辺部材に形成された前記凹部に挿入されており、対向配置された一対の前記コイルの間隔を調整するコイル間隔調整手段を備えていることを特徴としている。 The present invention has been made based on the above findings, and the continuous casting mold according to the present invention is sandwiched between a pair of long side members facing each other and a pair of long side members facing each other and facing each other. A pair of short side members, an electromagnetic brake device, and a pair of long side member spacing adjusting means for adjusting the spacing between the pair of long side members, and a pair of the long side members and a pair of the short side members. A casting space is formed by the above, and a recess recessed toward the casting space side is formed in a lower portion of the back surface of the long side member, and the electromagnetic braking device is arranged to face each other together with the pair of the long side members. It comprises a pair of cores and a pair of coils wound around these cores, each of which has a trailing end supported by the core and a tip thereof formed on the long side member. It is characterized in that it is inserted into the recess and is provided with a coil spacing adjusting means for adjusting the spacing between the pair of the coils arranged so as to face each other.

この構成の連続鋳造用鋳型によれば、対向配置された一対の前記コイルの間隔を調整するコイル間隔調整手段を備えているので、長辺部材間隔調整手段によって一対の前記長辺部材の間隔を調整して短辺部材を交換して鋳片の厚みを変更した場合であっても、一対のコイルの間隔を適正化させることができ、鋳造空間内の溶鋼に対して効率的に電磁力を作用させることができる。
よって、電磁ブレーキ装置による鋳片の内部への非金属介在物及び気泡の巻き込み防止効果を十分に奏功せしめることができ、巻き込みの少ない高品質な鋳片を製造することができる。
According to the continuous casting mold having this configuration, since the coil spacing adjusting means for adjusting the spacing between the pair of the coils arranged to face each other is provided, the spacing between the pair of long-side members is adjusted by the long-side member spacing adjusting means. Even when the thickness of the slab is changed by adjusting and replacing the short side member, the distance between the pair of coils can be optimized, and the electromagnetic force can be efficiently applied to the molten steel in the casting space. Can act.
Therefore, the effect of preventing the entrainment of non-metal inclusions and air bubbles inside the slab by the electromagnetic brake device can be fully achieved, and a high-quality slab with less entrainment can be produced.

ここで、本発明の連続鋳造用鋳型においては、前記コイル間隔調整手段は、前記コアとともに前記コイルを移動させる構成としてもよい。
この場合、一対のコアの間隔も調整可能となり、鋳造空間内の溶鋼に対してさらに効率的に電磁力を作用させることができる。
また、コア部材を移動可能とすることで、短辺部材を交換する際の作業スペースを十分に確保することができ、交換作業を効率的に実施することができる。
Here, in the mold for continuous casting of the present invention, the coil spacing adjusting means may be configured to move the coil together with the core.
In this case, the distance between the pair of cores can also be adjusted, and the electromagnetic force can be applied to the molten steel in the casting space more efficiently.
Further, by making the core member movable, it is possible to secure a sufficient work space when replacing the short side member, and it is possible to efficiently carry out the replacement work.

また、本発明の連続鋳造用鋳型においては、前記コイル間隔調整手段は、前記長辺部材間隔調整手段による前記長辺部材の移動と同期して、前記コイルを移動する構成とされていてもよい。
この場合、前記長辺部材間隔調整手段によって一対の長辺部材の間隔を調整する際に、これに同期して、前記コイル間隔調整手段によって一対のコイルの間隔も調整されることになり、間隔調整作業を効率的に実施することができる。
また、一つの駆動装置で前記長辺部材間隔調整手段及び前記コイル間隔調整手段を構成することもでき、設備構成を簡素化することが可能となる。
Further, in the continuous casting mold of the present invention, the coil spacing adjusting means may be configured to move the coil in synchronization with the movement of the long side member by the long side member spacing adjusting means. ..
In this case, when the distance between the pair of long side members is adjusted by the long side member spacing adjusting means, the distance between the pair of coils is also adjusted by the coil spacing adjusting means in synchronization with this, and the spacing is also adjusted. The adjustment work can be carried out efficiently.
Further, the long side member spacing adjusting means and the coil spacing adjusting means can be configured by one drive device, and the equipment configuration can be simplified.

上述のように、本発明によれば、一対の長辺部材の間隔を調整して短辺部材を交換し、製造する鋳片の厚みを変更した場合であっても、電磁ブレーキ装置による電磁力を効率的に溶鋼に作用させることができ、電磁ブレーキ装置による鋳片の内部への非金属介在物及び気泡の巻き込み防止効果を十分に奏功せしめることが可能な連続鋳造用鋳型を提供することができる。 As described above, according to the present invention, even when the distance between the pair of long side members is adjusted to replace the short side members and the thickness of the slab to be manufactured is changed, the electromagnetic force of the electromagnetic brake device is used. It is possible to provide a mold for continuous casting capable of efficiently acting on molten steel and sufficiently achieving the effect of preventing non-metal inclusions and air bubbles from being entrained inside the slab by the electromagnetic brake device. can.

本発明の実施形態である連続鋳造用鋳型を備えた連続鋳造装置の一例を示す概略説明図である。It is a schematic explanatory drawing which shows an example of the continuous casting apparatus provided with the mold for continuous casting which is an embodiment of this invention. 本発明の実施形態である連続鋳造用鋳型の側面説明図である。It is a side side explanatory view of the mold for continuous casting which is an embodiment of this invention. 本発明の実施形態である連続鋳造用鋳型の平面説明図及び一部断面説明図である。It is a plan view and a partial cross-sectional explanatory view of the mold for continuous casting which is an embodiment of this invention. 本発明の実施形態である連続鋳造用鋳型の正面説明図である。It is a front explanatory view of the mold for continuous casting which is an embodiment of this invention. 鋳造時における連続鋳造装置の鋳造空間内の概略説明図である。It is a schematic explanatory drawing in the casting space of the continuous casting apparatus at the time of casting.

以下に、本発明の実施形態について、添付した図面を参照して説明する。なお、本発明は、以下の実施形態に限定されるものではない。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The present invention is not limited to the following embodiments.

まず、図1に示した本実施形態である連続鋳造用鋳型50を備えた連続鋳造装置10をについて説明する。 First, the continuous casting apparatus 10 provided with the continuous casting mold 50 according to the present embodiment shown in FIG. 1 will be described.

図1に示す連続鋳造設備10は、本実施形態である連続鋳造用鋳型50と、この連続鋳造用鋳型50の下方に位置する複数のサポートロール26からなるサポートロール群20と、を備えており、連続鋳造用鋳型50から製出された鋼鋳片30を下方へと引き抜く垂直帯14と、鋼鋳片30を湾曲させる曲げ帯15と、湾曲させた鋼鋳片30を曲げ戻す矯正帯16と、鋼鋳片30を水平方向へ搬送する水平帯17と、を有する垂直曲げ型連続鋳造機とされている。 The continuous casting facility 10 shown in FIG. 1 includes a continuous casting mold 50 according to the present embodiment, and a support roll group 20 composed of a plurality of support rolls 26 located below the continuous casting mold 50. , A vertical band 14 that pulls out the steel slab 30 produced from the continuous casting mold 50 downward, a bending band 15 that bends the steel slab 30, and a straightening band 16 that bends the curved steel slab 30 back. It is a vertical bending type continuous casting machine having a horizontal band 17 for transporting the steel slab 30 in the horizontal direction.

ここで、サポートロール群20は、鋼鋳片30を下方へと引き抜く垂直帯14に位置するピンチロールユニット21と、鋼鋳片30を湾曲させる曲げ帯15に位置するベンディングロールユニット22と、湾曲させた鋼鋳片30を曲げ戻す矯正帯16に位置する矯正ロールユニット23と、鋼鋳片30を水平方向へ搬送する水平帯17に位置する水平ロールユニット24と、を備えている。
なお、これらのサポートロール26は、鋼鋳片30の幅方向に延在しており、鋼鋳片30の長辺面を支持する構成とされている。
Here, the support roll group 20 includes a pinch roll unit 21 located in a vertical band 14 that pulls out the steel slab 30 downward, and a bending roll unit 22 located in a bending band 15 that bends the steel slab 30. It includes a straightening roll unit 23 located in a straightening band 16 for bending back the steel slabs 30 to be made, and a horizontal roll unit 24 located in a horizontal strip 17 for horizontally transporting the steel slabs 30.
These support rolls 26 extend in the width direction of the steel slab 30 and are configured to support the long side surface of the steel slab 30.

そして、本実施形態である連続鋳造用鋳型50においては、図2及び図3に示すように、一対の長辺部材51(51a、51b)と、この一対の長辺部材51(51a、51b)に挟持される一対の短辺部材56(56a、56b)と、電磁ブレーキ装置60と、一対の長辺部材51(51a、51b)の間隔を調整する長辺部材間隔調整手段70と、を備えており、長辺部材間隔調整手段70によって、一対の長辺部材51(51a、51b)の間隔を広げて一対の短辺部材56(56a、56b)を交換することにより、製造する鋼鋳片30の厚みを変更可能な構成とされている。 Then, in the continuous casting mold 50 of the present embodiment, as shown in FIGS. 2 and 3, a pair of long side members 51 (51a, 51b) and the pair of long side members 51 (51a, 51b) are used. A pair of short side members 56 (56a, 56b) sandwiched between the two, an electromagnetic brake device 60, and a long side member spacing adjusting means 70 for adjusting the spacing between the pair of long side members 51 (51a, 51b). A steel slab manufactured by widening the distance between the pair of long side members 51 (51a, 51b) and replacing the pair of short side members 56 (56a, 56b) by the long side member spacing adjusting means 70. The thickness of 30 can be changed.

長辺部材51(51a、51b)は、図2に示すように、長辺銅板52(52a、52b)と、この長辺銅板52(52a、52b)を冷却する長辺冷却箱53(53a、53b)と、を備えている。
そして、一対の長辺部材51(51a、51b)の一方(図2において右側)が第一長辺部材51aとされ、一対の長辺部材51(51a、51b)の他方(図2において左側)が第二長辺部材51bとされている。
そして、第一長辺部材51aが固定されており、第二長辺部材51bが長辺部材間隔調整手段70によって移動するように構成されている。
As shown in FIG. 2, the long side member 51 (51a, 51b) has a long side copper plate 52 (52a, 52b) and a long side cooling box 53 (53a, 52b) for cooling the long side copper plate 52 (52a, 52b). 53b) and.
Then, one of the pair of long side members 51 (51a, 51b) (right side in FIG. 2) is regarded as the first long side member 51a, and the other side of the pair of long side members 51 (51a, 51b) (left side in FIG. 2). Is the second long side member 51b.
The first long side member 51a is fixed, and the second long side member 51b is configured to be moved by the long side member spacing adjusting means 70.

短辺部材56(56a、56b)は、図3に示すように、短辺銅板57(57a、57b)と、この短辺銅板57(57a、57b)を冷却する短辺冷却部58(58a、58b)と、を備えている。
この短辺部材56(56a、56b)の短辺銅板57(57a、57b)が、一対の長辺部材51(51a、51b)の長辺銅板52(52a、52b)に挟持されることによって、断面矩形状の鋳造空間Sが形成されている。
また、短辺部材56(56a、56b)においては、短辺冷却部58(58a、58b)の背面側(短辺銅板57の反対側)には、短辺部材移動手段59としてシリンダ部材が配設されており、鋳造空間Sの幅長さ(すなわち、鋼鋳片30の幅)を調整可能とされている。
As shown in FIG. 3, the short side member 56 (56a, 56b) has a short side copper plate 57 (57a, 57b) and a short side cooling portion 58 (58a, 58a,) for cooling the short side copper plate 57 (57a, 57b). 58b) and.
The short side copper plate 57 (57a, 57b) of the short side member 56 (56a, 56b) is sandwiched between the long side copper plates 52 (52a, 52b) of the pair of long side members 51 (51a, 51b). A casting space S having a rectangular cross section is formed.
Further, in the short side member 56 (56a, 56b), a cylinder member is arranged as a short side member moving means 59 on the back surface side (opposite side of the short side copper plate 57) of the short side cooling portion 58 (58a, 58b). The width and length of the casting space S (that is, the width of the steel slab 30) can be adjusted.

一対の長辺部材51(51a、51b)の間隔を調整する長辺部材間隔調整手段70は、図3に示すように、上面視して、長辺銅板52(52a、52b)を挟んで両側に配設された一対のシリンダ部材によって構成されている。
長辺部材間隔調整手段70によって、第二長辺部材51bが、第一長辺部材51aに対して近接離反するように移動することで、一対の長辺部材51(51a、51b)の間隔を調整可能とされている。
As shown in FIG. 3, the long-side member spacing adjusting means 70 for adjusting the spacing between the pair of long-side members 51 (51a, 51b) sandwiches the long-side copper plates 52 (52a, 52b) on both sides when viewed from above. It is composed of a pair of cylinder members arranged in.
By moving the second long side member 51b so as to be close to and separated from the first long side member 51a by the long side member spacing adjusting means 70, the distance between the pair of long side members 51 (51a, 51b) is increased. It is said to be adjustable.

電磁ブレーキ装置60は、図2に示すように、一対の長辺部材51(51a、51b)とともに対向配置された一対のコア61(61a、61b)と、コア61(61a、61b)の周囲にそれぞれ捲回された一対のコイル62(62a、62b)と、対向配置された一対のコイル62(62a、62b)の間隔を調整するコイル間隔調整手段67と、を備えている。 As shown in FIG. 2, the electromagnetic brake device 60 is provided around a pair of cores 61 (61a, 61b) arranged to face each other together with a pair of long side members 51 (51a, 51b) and around the core 61 (61a, 61b). A pair of wound coils 62 (62a, 62b) and a coil spacing adjusting means 67 for adjusting the spacing between the pair of coils 62 (62a, 62b) arranged to face each other are provided.

本実施形態においては、図2に示すように、長辺部材51(51a、51b)の背面の下方部分には鋳造空間S側に向かって凹んだ凹部54(54a、54b)が形成されており、この凹部54(54a、54b)に、それぞれコア61(61a、61b)及びコイル62(62a、62b)が配置されている。これにより、鋳造空間部S内の溶鋼に対して、コア61及びコイル62が近接して配置される構成とされている。 In the present embodiment, as shown in FIG. 2, a recess 54 (54a, 54b) recessed toward the casting space S side is formed in the lower portion of the back surface of the long side member 51 (51a, 51b). A core 61 (61a, 61b) and a coil 62 (62a, 62b) are arranged in the recesses 54 (54a, 54b), respectively. As a result, the core 61 and the coil 62 are arranged in close proximity to the molten steel in the casting space S.

そして、固定された第一長辺部材51a側に配置された第一コア61aは、その後端部分が固定フレーム68に固定され、その先端部分が第一長辺部材51aの凹部54aに挿入されている。
また、第一コア61aの周囲に捲回された第一コイル62aは、固定フレーム68に固定されている。
The rear end portion of the first core 61a arranged on the fixed first long side member 51a side is fixed to the fixed frame 68, and the tip end portion thereof is inserted into the recess 54a of the first long side member 51a. There is.
Further, the first coil 62a wound around the first core 61a is fixed to the fixed frame 68.

一方、移動可能とされた第二長辺部材51b側に配置された第二コア61bは、その後端部分が、固定フレーム68に設けられた貫通孔69に挿通されており、その先端部分が第二長辺部材51bの凹部54bに挿入されている。
また、第二コア61bの周囲に捲回された第二コイル62bは、第二コア61bに支持されている。
On the other hand, the rear end portion of the second core 61b arranged on the side of the second long side member 51b made movable is inserted into the through hole 69 provided in the fixed frame 68, and the tip portion thereof is the first. It is inserted into the recess 54b of the two long side members 51b.
Further, the second coil 62b wound around the second core 61b is supported by the second core 61b.

そして、コイル間隔調整手段67は、図2から図4に示すように、第二コア61bの後端に接続されたシリンダ部材で構成されている。
すなわち、本実施形態では、第二コア61bを移動することにより、この第二コア61bに支持された第二コイル62bを移動させ、一対のコイル62(62a、62b)の間隔を調整する構成とされている。
The coil spacing adjusting means 67 is composed of a cylinder member connected to the rear end of the second core 61b, as shown in FIGS. 2 to 4.
That is, in the present embodiment, by moving the second core 61b, the second coil 62b supported by the second core 61b is moved, and the distance between the pair of coils 62 (62a, 62b) is adjusted. Has been done.

次に、本実施形態である連続鋳造用鋳型50を備えた連続鋳造設備10による鋼鋳片30の製造方法について説明する。 Next, a method of manufacturing the steel slab 30 by the continuous casting equipment 10 provided with the continuous casting mold 50 according to the present embodiment will be described.

まず、一対の長辺部材51(51a、51b)の間に一対の短辺部材56(56a、56b)を挿入し、短辺部材移動手段59によって、鋳造する鋼鋳片30の幅に応じて一対の短辺部材56(56a、56b)の位置調整を行う。
その後、長辺部材間隔調整手段70によって、第二長辺部材51bを第一長辺部材51aに近接するように移動させて一対の長辺部材51(51a、51b)の間隔を狭め、一対の短辺部材56(56a、56b)を挟持する。これにより、図3に示すように、断面矩形状の鋳造空間Sが形成される。
そして、電磁ブレーキ装置60のコイル間隔調整手段67によって、第二コイル62bを第二コア61bとともに移動させて、一対のコイル62(62a、62b)の間隔を調整する。
First, a pair of short side members 56 (56a, 56b) are inserted between the pair of long side members 51 (51a, 51b), and the short side member moving means 59 is used to cast steel pieces according to the width of the slab 30. The position of the pair of short side members 56 (56a, 56b) is adjusted.
After that, the long side member spacing adjusting means 70 moves the second long side member 51b so as to be close to the first long side member 51a to narrow the spacing between the pair of long side members 51 (51a, 51b), and the pair. The short side member 56 (56a, 56b) is sandwiched. As a result, as shown in FIG. 3, a casting space S having a rectangular cross section is formed.
Then, the coil spacing adjusting means 67 of the electromagnetic brake device 60 moves the second coil 62b together with the second core 61b to adjust the spacing between the pair of coils 62 (62a, 62b).

上述のように、連続鋳造用鋳型50を調整して鋳造空間Sを形成した後、鋳造空間S内に浸漬ノズル12を配置する。
ここで、図5に示すように、上述の浸漬ノズル12には、一対の吐出孔13(13a、13b)が設けられており、これらの吐出孔13(13a、13b)から溶鋼が吐出される。
As described above, after adjusting the continuous casting mold 50 to form the casting space S, the dipping nozzle 12 is arranged in the casting space S.
Here, as shown in FIG. 5, the above-mentioned immersion nozzle 12 is provided with a pair of discharge holes 13 (13a, 13b), and molten steel is discharged from these discharge holes 13 (13a, 13b). ..

鋳型空間S内の溶鋼は、短辺部材56(56a、56b)及び長辺部材51(51a、51b)から冷却され、短辺銅板57(57a、57b)及び長辺銅板52(52a、52b)の表面に凝固シェル31が形成され、鋳造空間Sの断面形状に応じた鋼鋳片30が製造される。 The molten steel in the mold space S is cooled from the short side member 56 (56a, 56b) and the long side member 51 (51a, 51b), and is cooled from the short side copper plate 57 (57a, 57b) and the long side copper plate 52 (52a, 52b). A solidified shell 31 is formed on the surface of the casting space S, and a steel slab 30 corresponding to the cross-sectional shape of the casting space S is manufactured.

ここで、鋳造空間S内の溶鋼の上には、溶鋼の保温、及び、凝固シェル31と短辺銅板57及び長辺銅板52との間の潤滑性を確保するために、鋳造パウダーが供給される。また、鋼鋳片30への非金属介在物の持ち込みを防止するために、鋳造空間S内に供給される溶鋼に対してアルゴンガス等の不活性ガスを吹き込まれる。
このとき、吹き込まれるアルゴンガスの気泡、鋳造パウダー及び介在物等が、浸漬ノズル12からの吐出流によって鋳造空間S内の下方位置にまで混入することがある。
本実施形態の連続鋳造用鋳型50においては、電磁ブレーキ装置60を備えており、電磁力を作用させることで鋳造空間Sの下方側へ向かう溶鋼の流速を抑制している。これにより、気泡、鋳造パウダー及び介在物等が鋳型の下方側へと混入することを抑制し、鋼鋳片30の内部への非金属介在物及び気泡の巻き込みを低減している。
Here, casting powder is supplied onto the molten steel in the casting space S in order to keep the molten steel warm and to ensure the lubricity between the solidified shell 31 and the short-sided copper plate 57 and the long-sided copper plate 52. Lubricity. Further, in order to prevent the non-metal inclusions from being brought into the steel slab 30, an inert gas such as argon gas is blown into the molten steel supplied into the casting space S.
At this time, bubbles of argon gas blown in, casting powder, inclusions, and the like may be mixed into the lower position in the casting space S by the discharge flow from the immersion nozzle 12.
The continuous casting mold 50 of the present embodiment is provided with an electromagnetic brake device 60, and the flow velocity of the molten steel toward the lower side of the casting space S is suppressed by applying an electromagnetic force. As a result, air bubbles, casting powder, inclusions and the like are suppressed from being mixed into the lower side of the mold, and non-metal inclusions and air bubbles are reduced from being entrained inside the steel slab 30.

そして、連続鋳造設備10に連続鋳造用鋳型50を取り付けた状態で(オンラインで)、鋼鋳片30の厚みを変更する場合には、一旦、浸漬ノズル12からの溶鋼の供給を中止する。
この状態で、まず、コイル間隔調整手段67によって、第二コイル62bを第二コア61bとともに、第一コイル62a及び第一コア61aから離間するように移動させて、一対のコイル62(62a、62b)の間隔、及び、一対のコア61(61a、61b)の間隔を広げておく。これにより、第二長辺部材51bを移動させた際に、第二コイル62b及び第二コア61bと干渉しないように、第二長辺部材51bの移動空間を確保する。
Then, when the thickness of the steel slab 30 is changed with the continuous casting mold 50 attached to the continuous casting facility 10 (online), the supply of molten steel from the dipping nozzle 12 is temporarily stopped.
In this state, first, the second coil 62b is moved together with the second core 61b so as to be separated from the first coil 62a and the first core 61a by the coil spacing adjusting means 67, and the pair of coils 62 (62a, 62b). ) And the distance between the pair of cores 61 (61a, 61b) are widened. As a result, when the second long side member 51b is moved, the moving space of the second long side member 51b is secured so as not to interfere with the second coil 62b and the second core 61b.

次に、長辺部材間隔調整手段70によって、第二長辺部材51bを第一長辺部材51aから離間するように移動させて一対の長辺部材51(51a、51b)の間隔を広げておく。
この状態で、使用した一対の短辺部材56(56a、56b)を取り出し、次に鋳造する鋼鋳片30の厚みに応じた新たな一対の短辺部材56(56a、56b)を一対の長辺部材51(51a、51b)の間に挿入する。そして、短辺部材移動手段59によって、鋳造する鋼鋳片30の幅に応じて一対の短辺部材56(56a、56b)の位置調整を行う。
Next, the long side member spacing adjusting means 70 moves the second long side member 51b away from the first long side member 51a to widen the gap between the pair of long side members 51 (51a, 51b). ..
In this state, the pair of short side members 56 (56a, 56b) used are taken out, and a new pair of short side members 56 (56a, 56b) corresponding to the thickness of the steel slab 30 to be cast next are paired with lengths. It is inserted between the side members 51 (51a, 51b). Then, the short side member moving means 59 adjusts the positions of the pair of short side members 56 (56a, 56b) according to the width of the steel slab 30 to be cast.

その後、長辺部材間隔調整手段70によって、第二長辺部材51bを第一長辺部材51aに近接するように移動させて一対の長辺部材51(51a、51b)の間隔を狭め、一対の短辺部材56(56a、56b)を挟持する。
そして、電磁ブレーキ装置60のコイル間隔調整手段67によって、第二コイル62bを第二コア61bとともに移動させて、一対のコイル62(62a、62b)の間隔を調整する。
After that, the long side member spacing adjusting means 70 moves the second long side member 51b so as to be close to the first long side member 51a to narrow the spacing between the pair of long side members 51 (51a, 51b), and the pair. The short side member 56 (56a, 56b) is sandwiched.
Then, the coil spacing adjusting means 67 of the electromagnetic brake device 60 moves the second coil 62b together with the second core 61b to adjust the spacing between the pair of coils 62 (62a, 62b).

このようにして、短辺部材56の交換をオンラインで行ったのち、浸漬ノズル12から溶鋼の供給を行い、鋼鋳片30の鋳造を再開する。 In this way, after the short side member 56 is replaced online, the molten steel is supplied from the dipping nozzle 12 and the casting of the steel slab 30 is restarted.

以上のような構成とされた本実施形態によれば、対向配置された一対のコイル62(62a、62b)の間隔を調整するコイル間隔調整手段67を備えているので、長辺部材間隔調整手段70によって一対の長辺部材51(51a、51b)の間隔を調整して短辺部材56を交換して鋼鋳片30の厚みを変更した場合であっても、一対のコイル62(62a、62b)の間隔を適正化させることができ、鋳造空間S内の溶鋼に対して効率的に電磁力を作用させることができる。
よって、電磁ブレーキ装置60による鋼鋳片30の内部への非金属介在物及び気泡の巻き込み防止効果を十分に奏功せしめることができ、巻き込みの少ない高品質な鋼鋳片30を製造することができる。
According to the present embodiment having the above configuration, since the coil spacing adjusting means 67 for adjusting the spacing between the pair of coils 62 (62a, 62b) arranged to face each other is provided, the long side member spacing adjusting means is provided. Even when the spacing between the pair of long side members 51 (51a, 51b) is adjusted by 70 to replace the short side members 56 and the thickness of the steel slab 30 is changed, the pair of coils 62 (62a, 62b) ) Can be optimized, and an electromagnetic force can be efficiently applied to the molten steel in the casting space S.
Therefore, the effect of preventing the entrainment of non-metal inclusions and air bubbles inside the steel slab 30 by the electromagnetic brake device 60 can be fully achieved, and a high-quality steel slab 30 with less entrainment can be manufactured. ..

また、本実施形態においては、コイル間隔調整手段67は、第二コア61bを移動させることにより、この第二コア61bに支持された第二コイル62bを移動させ、一対のコイル62(62a、62b)の間隔を調整する構成とされているので、コイル間隔調整手段67によって、一対のコア61(61a、61b)の間隔も調整可能となり、鋳造空間S内の溶鋼に対してさらに効率的に電磁力を作用させることができる。
また、コア61を移動可能とすることで、短辺部材56を交換する際の作業スペースを十分に確保することができ、交換作業を効率的に実施することができる。
Further, in the present embodiment, the coil spacing adjusting means 67 moves the second coil 62b supported by the second core 61b by moving the second core 61b, and the pair of coils 62 (62a, 62b). ) Is configured to be adjusted, so that the distance between the pair of cores 61 (61a, 61b) can also be adjusted by the coil spacing adjusting means 67, and the electromagnetic force is more efficiently applied to the molten steel in the casting space S. Force can be applied.
Further, by making the core 61 movable, it is possible to secure a sufficient work space when replacing the short side member 56, and it is possible to efficiently carry out the replacement work.

以上、本発明の実施形態である連続鋳造用鋳型について具体的に説明したが、本発明はこれに限定されることはなく、その発明の技術的思想を逸脱しない範囲で適宜変更可能である。
例えば、本実施形態では、図1に示す連続鋳造装置を用いたものとして説明したが、これに限定されることはなく、その他の構成の連続鋳造装置等を用いてもよい。
Although the mold for continuous casting, which is an embodiment of the present invention, has been specifically described above, the present invention is not limited to this, and can be appropriately changed without departing from the technical idea of the present invention.
For example, in the present embodiment, the continuous casting apparatus shown in FIG. 1 has been described, but the present invention is not limited to this, and a continuous casting apparatus having other configurations may be used.

また、本実施形態では、コイル間隔調整手段は、コイルをコアとともに移動する構成のものとして説明したが、これに限定されることはなく、コイルのみを移動する構成としてもよい。 Further, in the present embodiment, the coil spacing adjusting means has been described as having a configuration in which the coil is moved together with the core, but the present invention is not limited to this, and the coil spacing adjusting means may be configured to move only the coil.

さらに、コイル間隔調整手段は、長辺部材間隔調整手段による長辺部材の移動と同期して、コイルを移動する構成としてもよい。このように構成することで、コイル間隔の調整作業を効率的に実施することが可能となる。また、一つの駆動装置で前記長辺部材間隔調整手段及び前記コイル間隔調整手段を構成することもでき、設備構成を簡素化することが可能となる。 Further, the coil spacing adjusting means may be configured to move the coil in synchronization with the movement of the long side member by the long side member spacing adjusting means. With this configuration, it is possible to efficiently carry out the coil spacing adjustment work. Further, the long side member spacing adjusting means and the coil spacing adjusting means can be configured by one drive device, and the equipment configuration can be simplified.

また、本実施形態では、一対のコイルの一方を固定し、他方を移動可能とした構成として説明したが、これに限定されることはなく、一対のコイルの両方を移動可能な構成としてもよい。
さらに、オンラインだけでなく、オフラインで短辺部材を交換した際にも、コア、コイル位置の調整を行っても良い。
Further, in the present embodiment, one of the pair of coils is fixed and the other is movable, but the present invention is not limited to this, and both of the pair of coils may be movable. ..
Further, the core and coil positions may be adjusted not only online but also when the short side member is replaced offline.

50 連続鋳造用鋳型
51 長辺部材
56 短辺部材
60 電磁ブレーキ装置
61 コア
62 コイル
67 コイル間隔調整手段
70 長辺部材間隔調整手段
50 Mold for continuous casting 51 Long side member 56 Short side member 60 Electromagnetic brake device 61 Core 62 Coil 67 Coil spacing adjusting means 70 Long side member spacing adjusting means

Claims (3)

互いに対向する一対の長辺部材と、これら一対の長辺部材に挟持されるとともに互いに対向する一対の短辺部材と、電磁ブレーキ装置と、一対の前記長辺部材の間隔を調整する長辺部材間隔調整手段と、を有し、
一対の前記長辺部材と一対の前記短辺部材とによって鋳造空間が形成され、前記長辺部材の背面の下方部分には、前記鋳造空間側に向かって凹んだ凹部が形成されており、
前記電磁ブレーキ装置は、一対の前記長辺部材とともに対向配置された一対のコアと、これらコアの周囲にそれぞれ捲回された一対のコイルと、を備えており、前記コアは、その後端部分が支持され、その先端部分が前記長辺部材に形成された前記凹部に挿入されており、
対向配置された一対の前記コイルの間隔を調整するコイル間隔調整手段を備えていることを特徴とする連続鋳造用鋳型。
A pair of long side members facing each other, a pair of short side members sandwiched between the pair of long side members and facing each other, an electromagnetic brake device, and a long side member for adjusting the distance between the pair of long side members. With an interval adjusting means,
A casting space is formed by the pair of the long side members and the pair of short side members, and a recess recessed toward the casting space side is formed in the lower portion of the back surface of the long side member.
The electromagnetic brake device includes a pair of cores arranged to face each other together with the pair of long side members, and a pair of coils wound around the cores, respectively, and the core has a rear end portion thereof. It is supported and its tip portion is inserted into the recess formed in the long side member.
A mold for continuous casting, which comprises a coil spacing adjusting means for adjusting the spacing between a pair of coils arranged to face each other.
前記コイル間隔調整手段は、前記コアとともに前記コイルを移動させることを特徴とする請求項1に記載の連続鋳造用鋳型。 The mold for continuous casting according to claim 1, wherein the coil spacing adjusting means moves the coil together with the core. 前記コイル間隔調整手段は、前記長辺部材間隔調整手段による前記長辺部材の移動と同期して、前記コイルを移動する構成とされていることを特徴とする請求項1または請求項2に記載の連続鋳造用鋳型。 The first or second aspect of the present invention, wherein the coil spacing adjusting means is configured to move the coil in synchronization with the movement of the long side member by the long side member spacing adjusting means. Mold for continuous casting.
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JPH05293598A (en) * 1992-04-20 1993-11-09 Kawasaki Steel Corp Device for impressing static magnetic field in mold for continuous casting
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