JPS61206559A - Gas sealing method for molten steel flow - Google Patents
Gas sealing method for molten steel flowInfo
- Publication number
- JPS61206559A JPS61206559A JP4861085A JP4861085A JPS61206559A JP S61206559 A JPS61206559 A JP S61206559A JP 4861085 A JP4861085 A JP 4861085A JP 4861085 A JP4861085 A JP 4861085A JP S61206559 A JPS61206559 A JP S61206559A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- molten steel
- nozzle
- steel flow
- air
- 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
【発明の詳細な説明】
（産業上の利用分野）
この発明は溶鋼流のガスシール方法に関し、さらに詳し
くはスライディングノズルからの溶鋼流のガスシール方
法に間する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for gas sealing a molten steel flow, and more particularly to a method for gas sealing a molten steel flow from a sliding nozzle.
（従来の技術）
製鋼工程において取鋼内の溶鋼を鋳型に注入して鋼塊を
鋳造する際、取鋼の底部に設けたスライディングノズル
から流出した溶鋼流に空気が巻込まれると、溶鋼成分が
酸化して酸化介在物が生成されるので鋼塊品質上好まし
くない。この空気酸化を防止するために、従来は第６図
に示すように鋳型の注入管２２の上縁部に環状のポーラ
スプラグなどから成るシールリング２３をセットして、
このシールリング２３から溶鋼流２９の中心に向って水
平状にアルゴンガスなどの不活性ガスを噴出させてガス
シールする方法が採られている。(Prior art) During the steelmaking process, when molten steel in a steel draw is injected into a mold to cast a steel ingot, when air is drawn into the molten steel flow that flows out from the sliding nozzle provided at the bottom of the steel draw, the molten steel components are This is not desirable in terms of steel ingot quality because it oxidizes and produces oxidized inclusions. In order to prevent this air oxidation, conventionally, as shown in FIG. 6, a seal ring 23 made of an annular porous plug or the like is set on the upper edge of the injection pipe 22 of the mold.
A method is adopted in which an inert gas such as argon gas is ejected horizontally from the seal ring 23 toward the center of the molten steel flow 29 to provide a gas seal.
（発明が解決しようとする問題点）
ところが上記従来の方法によると、取鋼１の底部に設け
たスライディングノズル２の下部ノズル５とシールリン
グ２３の間で溶鋼流が空気中に露出するため、この部分
における空気の巻込みを防ぐことができなかった。(Problems to be Solved by the Invention) However, according to the above conventional method, the molten steel flow is exposed to the air between the lower nozzle 5 of the sliding nozzle 2 provided at the bottom of the steel stock 1 and the seal ring 23. Air entrainment in this part could not be prevented.
この発明は上記従来の問題点を解決するもので、スライ
ディングノズルの下部ノズルを流出した溶鋼流を外部の
空気から遮断し、溶鋼流への空気の巻込みを確実に防止
できる溶鋼流のガスシール方法を提供しようとするもの
である。This invention solves the above-mentioned conventional problems, and is a gas seal for the molten steel flow that can block the molten steel flow flowing out of the lower nozzle of the sliding nozzle from outside air and reliably prevent air from being entrained in the molten steel flow. It is intended to provide a method.
（問題点を解決するための手段）
しかしてこの発明の溶鋼流のガスシール方法は、取鋼の
底部に設けたスライディングノズルの下部ノズルから流
出する溶鋼流をガスシールするにあたって、噴気穴をそ
なえ上記下部ノズルの外周を包囲する中空環状体を、上
記下部ノズルに同期させて往復駆動し、上記下部ノズル
開放状態において上記噴気穴から不活性ガスを噴出させ
、上記不活性ガスにより上記溶鋼流をガスシールするこ
とを特徴とする溶鋼流のガスシール方法である。(Means for Solving the Problems) However, the method for gas sealing a molten steel flow according to the present invention provides a gas sealing method for a molten steel flow flowing out from a lower nozzle of a sliding nozzle provided at the bottom of a steel draw. A hollow annular body surrounding the outer periphery of the lower nozzle is reciprocated in synchronization with the lower nozzle, and when the lower nozzle is open, inert gas is spouted from the blowhole, and the inert gas causes the molten steel flow to flow. This is a gas sealing method for molten steel flow, which is characterized by gas sealing.
（作用）
この発明の溶鋼流のガスシール方法においては、下部ノ
ズルの外周を包囲する中空環状体および該中空環状体に
設けた噴気穴からの不活性ガス流により下部ノズルと注
入管（注入管上部に載置されるシールリング等を含む）
の間がシールされ、溶ｔＩ４流は外部の空気から遮断さ
れて溶鋼流への空気の巻込みが防止される。(Function) In the method for gas sealing a molten steel flow of the present invention, an inert gas flow from a hollow annular body surrounding the outer periphery of the lower nozzle and a blow hole provided in the hollow annular body connects the lower nozzle and the injection pipe (injection pipe). (Including seal ring etc. placed on top)
The space between the two is sealed, and the molten tI4 flow is isolated from outside air, thereby preventing air from being entrained in the molten steel flow.
（実施例）
以下第１図乃至第３図によりこの発明の一実施例を説明
する。(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.
図面はこの発明方法を実施するための装置の一例を示し
、図中１は取鋼、２は取鋼１の底部に設けたスライディ
ングノズルで、上部ノズル３と、図示しない油圧駆動機
構によりロッド４を介して矢印Ｘで示す水平方向に往復
駆動される下部ノズル５とから成る。６は下部ノズル５
から流出した溶鋼のふく射熱に対しスライディングノズ
ル２を保護する公知の防熱板で、ヒンジ形式などの取付
金具７により取鋼１の底面に固定取付され、中央部に設
けた断面コ字状の突条部８の頂面には、下部ノズル５の
往復動を許容する長穴９が穿設しである。１０は下部ノ
ズル５の外周を包囲する中空環状体で、パイプを折曲成
形した環状管１１の内周に円板状の遮蔽板１２を溶接し
、この遮蔽板１２の中央に穿設した穴１３に下部ノズル
５の外周が少量のすきまをもって嵌合している。なおこ
のすきまを耐火材などでシーすればさらに好ましい。環
状管１１の下面には円周上に下向きに多数個の噴気穴１
４が穿設してあり、また環状管１１内へ不活性ガスを供
給する給気管１５が環状管１１に溶接されている。１６
は棒鋼をコ字状に折曲げたガイドで、２本のガイド１６
の中央部を固着連結する連結板１７に給気管１５が固着
され、上側のガイド１６は防熱板６の上面に沿って矢印
Ｘ方向に摺動自在であり、中空環状体１０や給気管１５
の自重を支えている。給気管１５の他端部側は、作業床
１８に立設したスタンド１９の上端の保持管２０に摺動
自在に嵌合して支持され、またアルゴンガス等の不活性
ガス供給源に接続されたホース２１が給気管１５の端部
に着脱自在に連結されている。一方２２は鋼塊鋳造用の
鋳型の注入管で、その上端部には注入管シール用の公知
の短筒状のシールリング２３が載置され、給気管２４に
より供給された不活性ガスをシールリング内壁面に設け
た多数の噴気口２５から噴出するようになっている。２
６はシールリング２３上に載置した遮蔽リングで、シー
ルリング２３と共に注入管２２の一部を構成し、鋼製の
リング２７の上部および内外面を石綿繊維などの柔軟性
を有する断熱材２８で被覆して成る。The drawing shows an example of an apparatus for carrying out the method of the present invention, in which 1 is a steel stock, 2 is a sliding nozzle provided at the bottom of the steel stock 1, an upper nozzle 3, and a rod 4 by a hydraulic drive mechanism (not shown). The lower nozzle 5 is reciprocated in the horizontal direction indicated by the arrow X through the lower nozzle 5. 6 is the lower nozzle 5
This is a well-known heat shield plate that protects the sliding nozzle 2 from the radiant heat of the molten steel flowing out from the nozzle.It is fixedly attached to the bottom surface of the steel bar 1 with a mounting bracket 7 such as a hinge type, and has a protrusion with a U-shaped cross section provided in the center. A long hole 9 is bored in the top surface of the portion 8 to allow the lower nozzle 5 to reciprocate. Reference numeral 10 denotes a hollow annular body surrounding the outer periphery of the lower nozzle 5. A disk-shaped shielding plate 12 is welded to the inner periphery of an annular tube 11 made by bending a pipe, and a hole is bored in the center of this shielding plate 12. 13, the outer periphery of the lower nozzle 5 is fitted with a small gap. It is further preferable to seal this gap with a fireproof material or the like. On the lower surface of the annular pipe 11, there are a number of fumarole holes 1 extending downwardly on the circumference.
4 is perforated therein, and an air supply pipe 15 for supplying inert gas into the annular pipe 11 is welded to the annular pipe 11. 16
is a guide made by bending a steel bar into a U-shape, and there are two guides 16.
The air supply pipe 15 is fixed to a connecting plate 17 that firmly connects the central part of the hollow annular body 10 and the air supply pipe 15.
supports its own weight. The other end of the air supply pipe 15 is slidably fitted and supported by a holding pipe 20 at the upper end of a stand 19 set up on a work floor 18, and is connected to an inert gas supply source such as argon gas. A hose 21 is detachably connected to the end of the air supply pipe 15. On the other hand, 22 is an injection pipe of a mold for casting steel ingots, and a well-known short cylindrical seal ring 23 for sealing the injection pipe is placed on the upper end of the injection pipe to seal the inert gas supplied by the air supply pipe 24. The air is ejected from a large number of blowholes 25 provided on the inner wall surface of the ring. 2
6 is a shielding ring placed on the seal ring 23, which together with the seal ring 23 constitutes a part of the injection pipe 22, and the upper and inner and outer surfaces of the steel ring 27 are covered with a flexible heat insulating material 28 such as asbestos fiber. It is coated with
上記構成の装置において下部ノズル５を図示しない油圧
駆動機構により矢印Ｘで示す方向に往復駆動すれば、こ
の下部ノズル５に嵌合する遮蔽板１２を介して、中空環
状体１０およびこれと一体のガイド１６、給気管１５等
は矢印Ｘ方向に下部ノズル５と同期して往復駆動される
。そこで第１図に示すように下部ノズル５を開放状態と
したとき、給気管１５および２４にアルゴンガスなどの
不活性ガスを供給すれば、シールリング２３から溶鋼！
２９に向けて噴出する不活性ガスにより注入管２２の上
部がガスクールされるとともに、遮蔽板１２は上方から
遮蔽リング２６内へ空気が侵入するのを防止し、環状管
１１の噴気穴１４からの不活性ガスによるガスシールに
より遮蔽リング２６内への空気の侵入が防止されるので
、溶鋼流２９は不活性ガス雰囲気中に保持され、溶鋼流
２９への空気の巻込みを確実に防止できるのである。In the device configured as described above, when the lower nozzle 5 is reciprocated in the direction shown by the arrow X by a hydraulic drive mechanism (not shown), the hollow annular body 10 and the The guide 16, the air supply pipe 15, etc. are reciprocated in the direction of the arrow X in synchronization with the lower nozzle 5. Therefore, when the lower nozzle 5 is opened as shown in FIG. 1, if an inert gas such as argon gas is supplied to the air supply pipes 15 and 24, molten steel will be removed from the seal ring 23.
The upper part of the injection pipe 22 is cooled by the inert gas ejected toward the ring 29, and the shielding plate 12 prevents air from entering the shielding ring 26 from above, and prevents air from entering the shielding ring 26 from the blowhole 14 of the annular pipe 11. Since air is prevented from entering the shielding ring 26 by the gas seal with the inert gas, the molten steel flow 29 is maintained in an inert gas atmosphere, and entrainment of air into the molten steel flow 29 can be reliably prevented. It is.
なお上記においては遮蔽板１２と遮蔽リング２６は離間
させたままとしたが、第１図においてざらに取鋼１を下
降させて遮蔽板１２を遮蔽リング２６の断熱材２８に接
触させるようにすれば、空気に対するシール性はさらに
向上し不活性ガスの使用ｍは少なくて済む。In the above, the shielding plate 12 and the shielding ring 26 were kept separated, but in FIG. For example, the sealing performance against air is further improved and the use of inert gas can be reduced.
この発明は上記実施例に限定されるものではなく、たと
えば第４図に示すように前記環状管１１のかわりに短筒
状の中空円筒３０を用い、この中空円筒３０の底部に穿
設した噴気穴１４からの不活性ガスをシールリング２３
の上端面に直接吹付けてガスシールしたり、さらに第５
図に示すように上記不活性ガスを注入管２２の上端面に
直接吹付けてガスシールするようにしてもよい。また中
空環状体１０は下部ノズル駆動用のロッド４に連結して
往復駆動させてもよく、また下部ノズル５に固着取付し
て下部ノズル５により支持するようにしてもよい。さら
に噴気穴１４からの不活性ガスの噴出方向は下向きに限
定されるものではなく、水平方向あるいは傾斜方向とす
ることもでき、また噴気穴１４としてスリットを用いる
こともできる。The present invention is not limited to the above-mentioned embodiment. For example, as shown in FIG. Seal ring 23 seals inert gas from hole 14
It can be sprayed directly onto the upper end surface to seal the gas, or
As shown in the figure, the inert gas may be directly blown onto the upper end surface of the injection tube 22 to form a gas seal. Further, the hollow annular body 10 may be connected to the rod 4 for driving the lower nozzle and driven back and forth, or may be fixedly attached to the lower nozzle 5 and supported by the lower nozzle 5. Further, the direction in which the inert gas is ejected from the fumarole holes 14 is not limited to the downward direction, but may be horizontal or inclined, and a slit may also be used as the fume holes 14.
（発明の効果）
以上説明したようにこの発明によれば、スライディング
ノズルと注入管の間を中空環状体および該中空環状体に
設けた噴気穴からの不活性ガス流によりシールするよう
にしたので、下部ノズルから流出した溶鋼流への空気の
巻込みを確実に防止することができ、鋼塊品質の向上に
寄与するところ大である。(Effects of the Invention) As explained above, according to the present invention, the space between the sliding nozzle and the injection pipe is sealed by the inert gas flow from the hollow annular body and the blowhole provided in the hollow annular body. , it is possible to reliably prevent air from being entrained in the molten steel flow flowing out from the lower nozzle, which greatly contributes to improving the quality of the steel ingot.
第１図はこの発明の方法に使用する装置の一例を示す縦
断面図、第２図は第１図の矢視Ａ−Ａ側面図、第３図は
同じ＜Ｂ−Ｂ線断面図、第４図および第５図はこの発明
の方法に使用する装置の他の例を示す要部縦断面図、第
６図は従来のガスシール方法を示す要部縦断面図である
。
５・・・下部ノズル、１０・・・中空環状体、１１・・
・環状管、１２・・・遮蔽板、１４・・・噴気穴、１５
・・・給気管、１６・・・ガイド、３０・・・中空円筒
。
図 面
第６図FIG. 1 is a longitudinal cross-sectional view showing an example of the apparatus used in the method of the present invention, FIG. 2 is a side view taken along arrow A-A in FIG. 1, and FIG. 4 and 5 are longitudinal cross-sectional views of main parts showing other examples of the apparatus used in the method of the present invention, and FIG. 6 is a longitudinal cross-sectional view of main parts showing a conventional gas sealing method. 5... Lower nozzle, 10... Hollow annular body, 11...
- Annular pipe, 12... Shielding plate, 14... Fumarole hole, 15
... Air supply pipe, 16... Guide, 30... Hollow cylinder. Figure 6
Claims (1)
から流出する溶鋼流をガスシールするにあたつて、噴気
穴をそなえ上記下部ノズルの外周を包囲する中空環状体
を、上記下部ノズルに同期させて往復駆動し、上記下部
ノズル開放状態において上記噴気穴から不活性ガスを噴
出させ、上記不活性ガスにより上記溶鋼流をガスシール
することを特徴とする溶鋼流のガスシール方法。In gas-sealing the molten steel flow flowing out from the lower nozzle of the sliding nozzle provided at the bottom of the steel plate, a hollow annular body provided with a blowhole and surrounding the outer periphery of the lower nozzle is synchronized with the lower nozzle. A gas sealing method for a molten steel flow, characterized in that the molten steel flow is gas-sealed by reciprocating the lower nozzle, blowing out an inert gas from the blow hole when the lower nozzle is open, and gas-sealing the molten steel flow with the inert gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4861085A JPS61206559A (en) | 1985-03-12 | 1985-03-12 | Gas sealing method for molten steel flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4861085A JPS61206559A (en) | 1985-03-12 | 1985-03-12 | Gas sealing method for molten steel flow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61206559A true JPS61206559A (en) | 1986-09-12 |
Family
ID=12808174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4861085A Pending JPS61206559A (en) | 1985-03-12 | 1985-03-12 | Gas sealing method for molten steel flow |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61206559A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01178363A (en) * | 1988-01-06 | 1989-07-14 | Daido Steel Co Ltd | Method and device for pouring molten metal |
| US5286008A (en) * | 1990-10-20 | 1994-02-15 | Klockner Stahl Gmbh | System for inerting a casting vessel used for transporting molten metal |
| EP1661645A2 (en) | 2004-11-26 | 2006-05-31 | Heraeus Electro-Nite International N.V. | Process for regulating the flow rate and bottom tap hole for metallurgical vessel |
| DE102010050936A1 (en) | 2010-11-11 | 2012-05-16 | Heraeus Electro-Nite International N.V. | Floor spout nozzle for placement in the bottom of a metallurgical vessel |
| US8200145B2 (en) | 2007-10-05 | 2012-06-12 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus |
| CN105436494A (en) * | 2015-12-22 | 2016-03-30 | 芜湖新兴铸管有限责任公司 | Sealing ring and large package water port device |
-
1985
- 1985-03-12 JP JP4861085A patent/JPS61206559A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01178363A (en) * | 1988-01-06 | 1989-07-14 | Daido Steel Co Ltd | Method and device for pouring molten metal |
| US5286008A (en) * | 1990-10-20 | 1994-02-15 | Klockner Stahl Gmbh | System for inerting a casting vessel used for transporting molten metal |
| EP1661645A2 (en) | 2004-11-26 | 2006-05-31 | Heraeus Electro-Nite International N.V. | Process for regulating the flow rate and bottom tap hole for metallurgical vessel |
| DE102004057381A1 (en) * | 2004-11-26 | 2006-06-01 | Heraeus Electro-Nite International N.V. | Method for controlling the flow and bottom outlet for a metallurgical vessel |
| US8012405B2 (en) | 2004-11-26 | 2011-09-06 | Heraeus Electro-Nite International N.V. | Regulation method for melt throughflow through a melt throughflow aperture |
| US8273288B2 (en) | 2004-11-26 | 2012-09-25 | Rhi Ag | Regulation method for throughflow and bottom nozzle of a metallurgical vessel |
| US8200145B2 (en) | 2007-10-05 | 2012-06-12 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus |
| DE102010050936A1 (en) | 2010-11-11 | 2012-05-16 | Heraeus Electro-Nite International N.V. | Floor spout nozzle for placement in the bottom of a metallurgical vessel |
| WO2012062414A1 (en) | 2010-11-11 | 2012-05-18 | Heraeus Electro-Nite International N.V. | Floor casting nozzle for arrangement in the floor of a metallurgical container |
| CN105436494A (en) * | 2015-12-22 | 2016-03-30 | 芜湖新兴铸管有限责任公司 | Sealing ring and large package water port device |
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