JPH0691365A - Method and device to forcibly melt solidified steel in nozzle hole of slide valve device and to open nozzle hole - Google Patents
Method and device to forcibly melt solidified steel in nozzle hole of slide valve device and to open nozzle holeInfo
- Publication number
- JPH0691365A JPH0691365A JP18644692A JP18644692A JPH0691365A JP H0691365 A JPH0691365 A JP H0691365A JP 18644692 A JP18644692 A JP 18644692A JP 18644692 A JP18644692 A JP 18644692A JP H0691365 A JPH0691365 A JP H0691365A
- Authority
- JP
- Japan
- Prior art keywords
- steel
- molten steel
- pipe
- nozzle
- hole
- 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.)
- Pending
Links
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はスライドバルブ（以下Ｓ
Ｖと言う）装置の溶鋼流通孔内の凝固地金を溶融し、Ｓ
Ｖ装置のノズル孔に凝固した鋼を強制的に溶融、開口す
る方法及びその装置に関する。The present invention relates to a slide valve (hereinafter referred to as S
V) melts the solidified metal in the molten steel flow hole of the equipment
The present invention relates to a method and apparatus for forcibly melting and opening solidified steel in a nozzle hole of a V apparatus.
【０００２】[0002]
【従来の技術】連続鋳造設備では、取鍋に受けた溶融金
属はタンディッシュを経由して鋳型内に流し込まれる。
この際、鋳込初期には鋳型内へ溶融金属を流し込み始め
る前に、タンディッシュ内へある程度の溶融金属を溜め
ておき、不純物を浮上させた後ノズルを開いて鋳込みを
開始している。これをクローズドスタートと呼び、最近
この技術が多用されている。2. Description of the Related Art In continuous casting equipment, molten metal received in a ladle is poured into a mold via a tundish.
At this time, in the initial stage of casting, molten metal is accumulated in the tundish to some extent before pouring molten metal into the mold, and after floating impurities, the nozzle is opened to start casting. This is called a closed start, and this technology has been widely used recently.
【０００３】連続鋳造用タンディッシュのクローズドス
タートで、ＳＶ装置のノズル孔を閉じて溶融金属をタン
ディッシュ内へ溜めている間、ノズル孔内部で凝固しな
いように不活性ガスを吹き込む方法として種々の方式が
提案されている。例えば、ＳＶ装置の上プレート煉瓦の
溶鋼流通孔に通ずる複数のガス供給孔を設けるか又はこ
の部分を多孔質耐火物とした溶融金属排出装置、又は上
プレート煉瓦の開口部内の外周部沿いに形成した溝から
開口中心へスライドプレート側に向けて複数個の放射状
小孔をもつガス吹込みリングを配設した方式等が知られ
ている。There are various methods for blowing the inert gas so as not to solidify inside the nozzle hole while the molten metal is stored in the tundish by closing the nozzle hole of the SV device by the closed start of the continuous casting tundish. A scheme has been proposed. For example, a plurality of gas supply holes communicating with the molten steel flow holes of the upper plate brick of the SV device are provided, or a molten metal discharge device using this portion as a porous refractory, or formed along the outer peripheral portion inside the opening of the upper plate brick. There is known a system in which a gas blowing ring having a plurality of radial small holes is arranged from the groove toward the center of the opening toward the slide plate.
【０００４】[0004]
【考案が解決しようとする課題】以上の如き従来方式、
特に溶鋼温度が目標温度より低い場合はＳＶ装置を開に
しても、溶鋼が自然に流出しない場合がある。即ち、Ｓ
Ｖ装置のスライドプレート直上の上プレートの溶鋼流通
孔内の溶鋼が凝固し（通常「皮張り現象」と言う）自然
開口しない場合が多い。このような場合は従来タンディ
ッシュの上方から溶鋼をとおして酸素吹込み用ランスパ
イプを上ノズルの溶鋼流通孔内に挿入し強制開孔させる
方法が行われている（図３参照）。しかしながら、この
種作業は危険を伴うとともに前記ランスパイプを確実に
上ノズルの溶鋼流通孔内に挿入することが難しく、図３
に点線で示す如く、ランスパイプが中心よりずれる場合
が多く、この場合は上ノズル及びノズル受け煉瓦にＯ2
を吹付けることになり、上ノズル又はノズル受け煉瓦を
異常に損傷させ、場合によっては漏鋼事故を発生するこ
とがある。[Problems to be solved by the invention] The conventional method as described above,
Especially when the molten steel temperature is lower than the target temperature, the molten steel may not spontaneously flow out even if the SV device is opened. That is, S
In many cases, the molten steel in the molten steel flow hole of the plate just above the slide plate of the V apparatus solidifies (usually called "skinning phenomenon") and does not open naturally. In such a case, conventionally, a method has been used in which an oxygen injection lance pipe is inserted into the molten steel flow hole of the upper nozzle through the molten steel from above the tundish to forcibly open the hole (see FIG. 3). However, this kind of work is dangerous and it is difficult to surely insert the lance pipe into the molten steel flow hole of the upper nozzle.
As shown by a dotted line in, is often lance pipe is shifted from the center, O 2 In this case a brick receiving upper nozzle and nozzle
This may result in abnormal damage to the upper nozzle or the nozzle receiving brick, and in some cases, a steel leak accident may occur.
【０００５】[0005]
【発明が解決しようとする課題】本発明者等は前述の如
き従来方式の諸欠点を解決すべく種々検討、実験の結果
本発明を開発したものであり、本発明の技術的構成は、
ＳＶ装置における浸漬ノズル下部の溶鋼吐出孔より、該
浸漬ノズルの溶鋼流通孔を通して鋼製フレキシブルホー
ス又は先端部に先細り状の押上パイプを遊嵌した鋼管を
挿入し、該フレキシブルホース又は鋼管より酸素ガスを
吹込んで、上プレートの溶鋼流通孔底部に生じた凝固し
た鋼を溶融することを特徴とする、スライドバルブ装置
のノズル孔に凝固した鋼を強制的に溶融、開口する方
法、及びこの開口方法に用いるものであるＳＶ装置のハ
ウジング又はシールケースにフレキシブルホース用ガイ
ドパイプを有する固定金物を垂設し、該ガイドパイプを
通して酸素ガス吹込用フレキシブルホースを浸漬ノズル
の溶鋼の吐出孔より溶鋼流通孔に挿入或は予め浸漬ノズ
ルの溶鋼流通孔に、先端部に先細り形状の押上パイプを
遊嵌した鋼管を挿入した技術的構成とすることにより、
ＳＶ装置におけるクローズドスタート時の溶鋼流通孔閉
塞時に当り、迅速、容易に開口し溶鋼を流出しうる手段
を提供するものである。The inventors of the present invention have developed the present invention as a result of various studies and experiments in order to solve the above-mentioned drawbacks of the conventional method. The technical constitution of the present invention is as follows.
A steel flexible hose or a steel pipe having a tapered push-up pipe loosely fitted to the tip is inserted from the molten steel discharge hole at the bottom of the immersion nozzle in the SV device through the molten steel flow hole of the immersion nozzle, and oxygen gas is discharged from the flexible hose or steel pipe. Is blown to melt the solidified steel generated at the bottom of the molten steel flow hole of the upper plate, the method of forcibly melting and opening the solidified steel in the nozzle hole of the slide valve device, and this opening method. A fixed metal object having a guide pipe for a flexible hose is hung vertically in a housing or a seal case of an SV device used for the above, and a flexible hose for blowing oxygen gas is passed through the guide pipe from a molten steel discharge hole of a dipping nozzle to a molten steel flow hole. Insert or pre-insert a steel tube with a tapered push-up pipe loosely fitted into the molten steel flow hole of the immersion nozzle. With technical configurations,
It is intended to provide a means capable of quickly and easily opening a molten steel flow hole when the molten steel flow hole is closed at the time of a closed start in an SV device to flow out the molten steel.
【０００６】本発明の具体的数例を示す添付図面に基い
て詳述する。A detailed example of the present invention will be described in detail with reference to the accompanying drawings.
【０００７】図１はフレキシブルホース１を浸漬ノズル
１４の下部の溶鋼吐出孔１４′に挿入、固定する方式の
本発明機構の縦断面図である。２はフレキシブルホース
１用のガイドパイプであり、該ガイドパイプ２はこの例
ではＳＶ装置のシールケース１６下面に垂設した固定金
物３により支持してある。該ガイドパイプを通して酸素
ガス吹込用のフレキシブルホースを挿入し、その先端部
はシールプレート煉瓦１２の溶鋼流通孔まで延在させて
置く。FIG. 1 is a vertical cross-sectional view of the mechanism of the present invention in which the flexible hose 1 is inserted and fixed in the molten steel discharge hole 14 'below the dipping nozzle 14. Reference numeral 2 is a guide pipe for the flexible hose 1, and in this example, the guide pipe 2 is supported by a fixed metal piece 3 vertically provided on the lower surface of the seal case 16 of the SV device. A flexible hose for blowing oxygen gas is inserted through the guide pipe, and the tip end portion thereof is extended to the molten steel flow hole of the seal plate brick 12 and placed.
【０００８】前述の如き配置関係として、スライドプレ
ート１１を摺動し通常各プレート煉瓦の溶鋼流通孔を合
せることにより、タンディッシュ内の溶鋼を流出させる
ものであるが、上プレート煉瓦の溶鋼流通孔底部にはし
ばしば地金凝固層４が生じ、自然開口が不可能となる場
合があり、かゝる場合はフレキシブルホース１より酸素
ガスを吹込むことにより、凝固層は容易に溶融し溶鋼が
流出される。尚、フレキシブルホース１は溶鋼流通孔を
合せた時に図示の如く若干スライドプレートの溶鋼流通
孔内に突出させて、前記凝固層下面に接近させ酸素ガス
を吹込むことも容易である。In the arrangement relationship as described above, the molten steel in the tundish is flowed out by sliding the slide plate 11 and normally aligning the molten steel flow holes in the plate bricks. In some cases, a solidified metal layer 4 is often formed at the bottom and natural opening may not be possible. In such a case, blowing oxygen gas from the flexible hose 1 allows the solidified layer to be easily melted and molten steel to flow out. To be done. It is also easy to blow the flexible hose 1 slightly into the molten steel flow hole of the slide plate when the molten steel flow holes are aligned with each other so as to approach the lower surface of the solidified layer and blow oxygen gas.
【０００９】また、溶鋼流により溶融されるフレキシブ
ルホース、ガイドパイプ及び固定金物等は溶鋼の品質に
影響を与えない材質を用いることは勿論である。Of course, the flexible hoses, guide pipes, fixed hardware, etc., which are melted by the molten steel flow, are made of materials that do not affect the quality of the molten steel.
【００１０】更に、フレキシブルホースは自然開口が不
可能となった後に浸漬ノズル１４内に挿入、配置して
も、前述と同様の作用、効果を達成できる。Furthermore, even if the flexible hose is inserted and arranged in the immersion nozzle 14 after the natural opening becomes impossible, the same action and effect as described above can be achieved.
【００１１】図２は本発明の別の実施態様を示す縦断面
図である。この例では浸漬ノズル１４の溶鋼流通孔内に
鋼管２１を予め挿入しておき、この浸漬ノズル１４を浸
漬ノズル取付ホルダー２２にてＳＶ装置にセットし、し
かる後に前記鋼管２１をガイド金物３′で鋼管２１を固
定し、ついで該鋼管２１に酸素ガス吹込鋼管２１′を接
続する。FIG. 2 is a vertical sectional view showing another embodiment of the present invention. In this example, the steel pipe 21 is inserted into the molten steel flow hole of the immersion nozzle 14 in advance, the immersion nozzle 14 is set in the SV device by the immersion nozzle mounting holder 22, and then the steel pipe 21 is replaced by the guide metal 3 ′. The steel pipe 21 is fixed, and then the oxygen gas blown steel pipe 21 ′ is connected to the steel pipe 21.
【００１２】図２図示の機構では、浸漬ノズルの溶鋼流
通孔に前記鋼管２１のセンターリングのためのリング１
７が設けてあり、更に鋼管２１の上端部上に縦断面が先
細り状の押上パイプ１８が遊嵌してある。この押上パイ
プ１８は酸素ガスを吹込む際に、そのガス動圧により鋼
管２１より浮上し、酸素ガスが凝固した鋼の直下に接近
して吹込まれるために地金の溶融を迅速化でき、また凝
固した鋼直下に鋼管２１の先端が接触する様にコイルバ
ネ１９が設けてある。In the mechanism shown in FIG. 2, the ring 1 for the center ring of the steel pipe 21 is provided in the molten steel flow hole of the immersion nozzle.
7, a push-up pipe 18 having a tapered longitudinal section is loosely fitted on the upper end of the steel pipe 21. When the oxygen gas is blown, the push-up pipe 18 floats above the steel pipe 21 due to the dynamic pressure of the oxygen gas, and the oxygen gas approaches and blows immediately below the solidified steel, so that the melting of the metal can be accelerated. A coil spring 19 is provided just below the solidified steel so that the tip of the steel pipe 21 comes into contact therewith.
【００１３】[0013]
【発明の効果】本発明の構成とすることにより、クロー
ズドスタートに失敗した場合に、浸漬ノズル側から酸素
ガスを吹込むことにより、安全、迅速かつ確実に凝固層
（皮張り層）を溶融し、溶鋼を流出させることが可能と
なる。With the constitution of the present invention, when the closed start fails, oxygen gas is blown from the immersion nozzle side to melt the solidified layer (skin layer) safely, quickly and surely. It becomes possible to flow molten steel.
【図１】請求項２記載の発明の具体例を示す縦断面図。FIG. 1 is a vertical sectional view showing a specific example of the invention according to claim 2.
【図２】請求項３記載の発明の具体例を示す縦断面図。FIG. 2 is a vertical sectional view showing a specific example of the invention according to claim 3;
【図３】従来方式の一例を示す模式図。FIG. 3 is a schematic diagram showing an example of a conventional method.
１ フレキシブルホース ２ ガイドパイプ ３ 固定金物 ３′ ガイド金物 ４ 凝固した鋼（皮張り層） １０ 上プレート １１ スライドプレート １２ シールプレート １４ 浸漬ノズル １４′ 溶鋼吐出孔 １５ ハウジング １６ シールケース １７ リング １８ 押上パイプ ２１，２１′ 鋼管 ２２ 浸漬ノズル取付ホルダー 1 Flexible Hose 2 Guide Pipe 3 Fixed Hardware 3'Guide Hardware 4 Solidified Steel (Skin Layer) 10 Top Plate 11 Slide Plate 12 Seal Plate 14 Immersion Nozzle 14 'Molten Steel Discharge Hole 15 Housing 16 Seal Case 17 Ring 18 Push-up Pipe 21 , 21 'Steel pipe 22 Immersion nozzle mounting holder
Claims (3)
下部の溶鋼吐出孔より、該浸漬ノズルの溶鋼流通孔を通
して鋼製フレキシブルホース又は先端部に先細り状の押
上パイプを遊嵌した鋼管を挿入し、該フレキシブルホー
ス又は該鋼管より酸素ガスを吹込んで、上プレートの溶
鋼流通孔底部に生じた凝固した鋼を溶融することを特徴
とする、スライドバルブ装置のノズル孔に凝固した鋼を
強制的に溶融、開口する方法。1. A flexible hose made of steel or a steel pipe in which a tapered push-up pipe is loosely fitted to a tip end is inserted from a molten steel discharge hole at a lower part of a dipping nozzle in a slide valve device through a molten steel flow hole of the dipping nozzle. Blowing oxygen gas from the hose or the steel pipe to melt the solidified steel generated at the bottom of the molten steel flow hole of the upper plate, forcibly melting and opening the solidified steel in the nozzle hole of the slide valve device how to.
ールケースにフレキシブルホース用ガイドパイプを有す
る固定金物を垂設し、該ガイドパイプを通して酸素ガス
吹込用フレキシブルホースを浸漬ノズルの溶鋼吐出孔よ
り溶鋼流通孔に挿入したことを特徴とする、スライドバ
ルブ装置のノズル孔に凝固した鋼を強制開口する装置。2. A fixed metal object having a guide pipe for a flexible hose is vertically installed in a housing or a seal case of a slide valve device, and a flexible hose for blowing oxygen gas is passed through the guide pipe from a molten steel discharge hole of a dipping nozzle to a molten steel flow hole. A device for forcibly opening the solidified steel into the nozzle hole of the slide valve device, which is inserted.
細り状の押上パイプを遊嵌した鋼管を予め挿入して置
き、該浸漬ノズルをスライドバルブ装置に固定後、前記
鋼管に酸素ガス吹込鋼管を接続したことを特徴とする、
スライドバルブ装置のノズル孔に凝固した鋼を強制開口
する装置。3. A steel pipe having a tapered push-up pipe loosely fitted at its tip is inserted and placed in the molten steel flow hole of the immersion nozzle in advance, the immersion nozzle is fixed to a slide valve device, and then oxygen gas is blown into the steel pipe. Characterized by connecting a steel pipe,
A device that forcibly opens solidified steel into the nozzle hole of the slide valve device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18644692A JPH0691365A (en) | 1992-07-14 | 1992-07-14 | Method and device to forcibly melt solidified steel in nozzle hole of slide valve device and to open nozzle hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18644692A JPH0691365A (en) | 1992-07-14 | 1992-07-14 | Method and device to forcibly melt solidified steel in nozzle hole of slide valve device and to open nozzle hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0691365A true JPH0691365A (en) | 1994-04-05 |
Family
ID=16188599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18644692A Pending JPH0691365A (en) | 1992-07-14 | 1992-07-14 | Method and device to forcibly melt solidified steel in nozzle hole of slide valve device and to open nozzle hole |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0691365A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008009098A1 (en) * | 2006-07-20 | 2008-01-24 | Husky Injection Molding Systems Ltd. | Molding-system valve |
| KR100825326B1 (en) * | 2001-10-26 | 2008-04-28 | 주식회사 포스코 | Apparatus for opening the nozzle of tundish in the continuous billet-casting process |
-
1992
- 1992-07-14 JP JP18644692A patent/JPH0691365A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100825326B1 (en) * | 2001-10-26 | 2008-04-28 | 주식회사 포스코 | Apparatus for opening the nozzle of tundish in the continuous billet-casting process |
| WO2008009098A1 (en) * | 2006-07-20 | 2008-01-24 | Husky Injection Molding Systems Ltd. | Molding-system valve |
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