JPH0619966U - Porous nozzle for molten metal container - Google Patents

Porous nozzle for molten metal container

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Publication number
JPH0619966U
JPH0619966U JP5793292U JP5793292U JPH0619966U JP H0619966 U JPH0619966 U JP H0619966U JP 5793292 U JP5793292 U JP 5793292U JP 5793292 U JP5793292 U JP 5793292U JP H0619966 U JPH0619966 U JP H0619966U
Authority
JP
Japan
Prior art keywords
porous
nozzle
inert gas
porous brick
surrounded
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
Application number
JP5793292U
Other languages
Japanese (ja)
Inventor
勝 寺尾
恒信 佐伯
宏泰 初治
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shinagawa Refractories Co Ltd
Original Assignee
Shinagawa Refractories Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shinagawa Refractories Co Ltd filed Critical Shinagawa Refractories Co Ltd
Priority to JP5793292U priority Critical patent/JPH0619966U/en
Publication of JPH0619966U publication Critical patent/JPH0619966U/en
Pending legal-status Critical Current

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  • Continuous Casting (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Abstract

(57)【要約】 【構成】 本考案は、溶融金属容器用上部ノズルにおい
て、該上部ノズルの外周面を金属ケーシング(10)で
包囲し、溶鋼流通孔(20)の内周側で軸方向の1/2
以上をポーラス煉瓦(9)で構成し、該ポーラス煉瓦
(9)の外周、上部及び下部をキャスタブル耐火物
(8)で囲繞し、前記ポーラス煉瓦(9)と前記キャス
タブル耐火物(8)間の軸方向面間に不活性ガスプール
(11)を設け、該プール(11)に不活性ガスを供給
することを特徴とする。 【効果】 このような技術的構成とすることにより、高
温溶鋼となってもかつ長時間の連続操業してもシール性
を損うことがないポーラスノズルを提供しうるものであ
る。
(57) [Summary] The present invention relates to an upper nozzle for a molten metal container, wherein an outer peripheral surface of the upper nozzle is surrounded by a metal casing (10), and an axial direction is provided on an inner peripheral side of a molten steel flow hole (20). 1/2 of
The above is constituted by a porous brick (9), and the outer periphery, upper part and lower part of the porous brick (9) are surrounded by castable refractory (8), and between the porous brick (9) and the castable refractory (8). A feature is that an inert gas pool (11) is provided between the axial planes and the inert gas is supplied to the pool (11). [Effects] With such a technical configuration, it is possible to provide a porous nozzle that does not impair the sealing property even when it becomes high temperature molten steel and is continuously operated for a long time.

Description

【考案の詳細な説明】[Detailed description of the device]

【0001】[0001]

【産業上の利用分野】[Industrial applications]

本考案はノズル内孔表面から窒素やアルゴンなどの不活性ガスを吐出せしめ得 るようにしたポーラスノズルに関するものである。 The present invention relates to a porous nozzle capable of discharging an inert gas such as nitrogen or argon from the surface of the nozzle inner hole.

【0002】[0002]

【従来の技術】[Prior art]

スライドバルブ装置を用いて溶融金属の流量を制御するタンディッシュにおい て、上部ノズル(インサートノズル)は、溶鋼など溶融金属注入時の凝固防止及 びアルミナ閉塞(アルミナ系介在物がノズル内孔に付着して引き起こされるノズ ル閉塞)の防止などのために、窒素、アルゴン等の不活性ガスをノズル内孔表面 から吐出させることが可能なポーラスノズルが使用されている。 In a tundish that controls the flow rate of molten metal using a slide valve device, the upper nozzle (insert nozzle) prevents solidification when molten metal such as molten steel is injected and clogs alumina (alumina-based inclusions adhere to the nozzle inner hole). Porous nozzles that can discharge inert gas such as nitrogen and argon from the inner surface of the nozzle inner hole are used to prevent nozzle clogging caused by the above.

【0003】 従来のポーラスノズルを図2ないし図4を参照して説明する。図2に示すポー ラスノズルは、ポーラスれんが1の外周面を鉄板ケース2で囲み、ポーラスれん が1の外周面と鉄板ケース2との間に周回する空間3を設け、不活性ガスの供給 管4を鉄板3に接続したものである。図3に示すポーラスノズルは、ポーラスれ んが1の内部に細隙5を設け、鉄板ケース2を貫通する不活性ガス供給管4をこ の間隙5に連通させたものである。また、図4に示すポーラスノズルは、ポーラ スれんが1の外周を鉄板ケース2で囲み、該鉄板ケース2の下部とポーラスれん が1の下部との間に空間3を周設する。そして、この空間3に連通するように不 活性ガス供給管4を鉄板ケース2に接続する。ポーラスれんが1の上部外周面に は周回溝6を穿設し、該周回溝6と空間3を連通する縦溝7を複数条該ポーラス れんが1の側周囲に穿設する(実開昭60−56150号公報参照)。A conventional porous nozzle will be described with reference to FIGS. 2 to 4. In the porous nozzle shown in FIG. 2, the outer peripheral surface of the porous brick 1 is surrounded by an iron plate case 2, a space 3 is provided between the outer peripheral surface of the porous brick 1 and the iron plate case 2, and an inert gas supply pipe 4 is provided. Is connected to the iron plate 3. In the porous nozzle shown in FIG. 3, a narrow gap 5 is provided inside the porous brick 1, and an inert gas supply pipe 4 penetrating the iron plate case 2 is communicated with this gap 5. Further, in the porous nozzle shown in FIG. 4, the outer circumference of the porous brick 1 is surrounded by the iron plate case 2, and the space 3 is provided between the lower part of the iron plate case 2 and the lower part of the porous brick 1. Then, the inert gas supply pipe 4 is connected to the iron plate case 2 so as to communicate with the space 3. A circular groove 6 is formed on the outer peripheral surface of the upper portion of the porous brick 1, and a plurality of vertical grooves 7 are formed around the side of the porous brick 1 so as to connect the circular groove 6 and the space 3 (actual opening 60- 56150).

【0004】[0004]

【考案が解決しようとする課題】[Problems to be solved by the device]

前述した如き従来のポーラスノズルにおいては、何れも不活性吐出部のポーラ ス煉瓦の外側周面が直接鉄製のケーシングに囲まれている。このためポーラス煉 瓦の側周面のガスのシールは該鉄製ケーシングと、このケーシングとポーラス煉 瓦の間に充填された厚み数mm以下のモルタル或はシール材によって保持されて いる。 In each of the conventional porous nozzles as described above, the outer peripheral surface of the porous brick of the inert discharge portion is directly surrounded by the iron casing. For this reason, the gas seal on the side peripheral surface of the porous brick is held by the iron casing and a mortar or sealing material with a thickness of several mm or less filled between the casing and the porous brick.

【0005】 近時、タンディッシュ内において、プラズマトーチ、電磁ヒーター又は誘導電 流などによる溶鋼の加熱が行なわれるようになり、上部ノズル周辺の温度が従来 より高くなる傾向にある。この場合前述の公知構造のポーラスノズルでは鉄製ケ ーシング部の温度上昇により、ケーシングの熱膨脹あるいは変形が発生し、十分 なシール性が保持できないという問題がある。Recently, in a tundish, molten steel is heated by a plasma torch, an electromagnetic heater, an induction current or the like, and the temperature around the upper nozzle tends to be higher than before. In this case, in the porous nozzle having the above-described known structure, the temperature rise of the iron casing causes thermal expansion or deformation of the casing, which causes a problem that sufficient sealing performance cannot be maintained.

【0006】[0006]

【課題を解決するための手段】[Means for Solving the Problems]

前述の如き課題を解決するために、本考案者等は種々検討、実験の結果本考案 を開発したものであり、本考案の技術的構成は、溶融金属容器用上部ノズルにお いて、該上部ノズルの外周面を金属ケーシング(10)で包囲し、溶鋼流通孔( 20)の内周側で軸方向の1/2以上をポーラス煉瓦(9)で構成し、該ポーラ ス煉瓦(9)の外周、上部及び下部をキャスタブル耐火物(8)で囲繞し、前記 ポーラス煉瓦(9)と前記キャスタブル耐火物(8)間の軸方向面間に不活性ガ スプール(11)を設け、該プール(11)に不活性ガスを供給することを特徴 とし、このような技術的構成とすることにより、高温溶鋼となってもかつ長時間 の連続操業してもシール性を損うことがないポーラスノズルを提供しうるもので ある。 In order to solve the above-mentioned problems, the present inventors have developed the present invention as a result of various studies and experiments, and the technical configuration of the present invention is the upper nozzle for a molten metal container, The outer peripheral surface of the nozzle is surrounded by a metal casing (10), and half or more in the axial direction on the inner peripheral side of the molten steel flow hole (20) is made of porous brick (9). The outer circumference, the upper part and the lower part are surrounded by castable refractory (8), and an inert gas spool (11) is provided between the porous brick (9) and the castable refractory (8) in the axial direction, and the pool ( 11) is characterized by supplying an inert gas, and by adopting such a technical configuration, a porous nozzle that does not deteriorate the sealing property even if it becomes high temperature molten steel and is continuously operated for a long time. Can be provided.

【0007】[0007]

【作用】[Action]

本考案のポーラスノズルでは不活性ガス吐出部のポーラス煉瓦の溶鋼接触面以 外の周囲部がキャスタブル耐火物で包囲されており、プラズマトーチ、電磁ヒー ター又は誘導電流などによる溶鋼の加熱操作が行われ、ポーラスノズル近辺の溶 鋼の温度上昇による鉄製ケーシングが膨脹あるいは変形しても、ポーラス煉瓦外 周をキャスタブル耐火物で囲繞してあるため不活性ガス吹込みが長時間にわたっ て継続することができる。 In the porous nozzle of the present invention, the peripheral portion of the porous brick of the inert gas discharge part other than the molten steel contact surface is surrounded by the castable refractory, and the molten steel is heated by the plasma torch, electromagnetic heater or induction current. Even if the iron casing expands or deforms due to the temperature rise of the molten steel near the porous nozzle, the outer circumference of the porous brick is surrounded by castable refractory, so that the inert gas injection continues for a long time. You can

【0008】 本考案の一具体例の縦断面図を示す図1により詳述する。Detailed description will be given with reference to FIG. 1 which is a vertical sectional view of one embodiment of the present invention.

【0009】 図1において、9はポーラス煉瓦であり、溶鋼流通孔20の内周側で、その軸 方向の1/2以上に亘って配設してある。8はキャスタブル耐火物であり、前記 ポーラス煉瓦9の外周、上部及び下部を囲繞し、かつポーラス煉瓦9とキャスタ ブル耐火物の前述した軸方向の面間には不活性ガスプール11がポーラス煉瓦外 周全体に周設してある。更に、該不活性ガスプール11に不活性ガス供給管12 により、図示してない不活性ガス供給源から不活性ガスを供給しうる。In FIG. 1, reference numeral 9 denotes a porous brick, which is arranged on the inner peripheral side of the molten steel flow hole 20 over a half or more of its axial direction. Reference numeral 8 denotes a castable refractory, which surrounds the outer circumference, the upper part and the lower part of the porous brick 9 and an inert gas pool 11 is provided between the porous brick 9 and the axial surface of the castable refractory outside the porous brick. It is installed all around. Further, an inert gas can be supplied to the inert gas pool 11 by an inert gas supply pipe 12 from an inert gas supply source (not shown).

【0010】 前記キャスタブル耐火物の外周は図示の如く鉄製ケーシング10で包囲されて いる。The castable refractory is surrounded by an iron casing 10 as shown in the drawing.

【0011】[0011]

【考案の効果】[Effect of device]

以上の通り本考案のポーラスノズルによれば、タンディッシュ内においてプラ ズマトーチや電磁ヒーターあるいは誘導電流などによる溶鋼加熱により、上ノズ ル周辺の温度が上昇してもポーラス煉瓦のガスシール性を継続保持することが出 来る。 As described above, according to the porous nozzle of the present invention, the gas sealing property of the porous brick is continuously maintained even if the temperature around the upper nozzle rises due to the molten steel heating in the tundish by the plasma torch, electromagnetic heater or induction current. There will be things to do.

【0012】 従って、従来、鋳造時間の経過とともにガスシール性が損なわれ、ポーラスノ ズルの溶鋼流通孔にアルミナ系介在物が付着してノズル閉塞をきたし長時間の連 続操業を継続して行う事が難しかったが、このような問題点が確実に防止され操 業の継続を延長することが出来る。Therefore, conventionally, the gas sealability is impaired as the casting time elapses, alumina-based inclusions adhere to the molten steel flow holes of the porous nozzle, causing nozzle clogging, and continuous operation for a long time is required. However, such problems can be reliably prevented and the continuation of operations can be extended.

【図面の簡単な説明】[Brief description of drawings]

【図1】本考案機構の一具体例の縦断面図FIG. 1 is a vertical sectional view of a specific example of the mechanism of the present invention.

【図2】従来機構の一例を示す縦断面図FIG. 2 is a vertical sectional view showing an example of a conventional mechanism.

【図3】従来機構の一例を示す縦断面図FIG. 3 is a vertical sectional view showing an example of a conventional mechanism.

【図4】従来機構の一例を示す縦断面図FIG. 4 is a vertical sectional view showing an example of a conventional mechanism.

【符号の説明】[Explanation of symbols]

8 キャスタブル耐火物 9 ポーラス煉瓦 10 鉄製ケーシング 11 不活性ガスプール 12 不活性ガス供給管 8 Castable refractories 9 Porous bricks 10 Iron casing 11 Inert gas pool 12 Inert gas supply pipe

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】 溶融金属容器用上部ノズルにおいて、該
上部ノズルの外周面を金属ケーシング(10)で包囲
し、溶鋼流通孔(20)の内周側で軸方向の1/2以上
をポーラス煉瓦(9)で構成し、該ポーラス煉瓦(9)
の外周、上部及び下部をキャスタブル耐火物(8)で囲
繞し、前記ポーラス煉瓦(9)と前記キャスタブル耐火
物(8)間の軸方向面間に不活性ガスプール(11)を
設け、該プール(11)に不活性ガスを供給することを
特徴とする、溶融金属容器用ポーラスノズル。
1. In an upper nozzle for a molten metal container, an outer peripheral surface of the upper nozzle is surrounded by a metal casing (10), and a half or more of the axial direction on the inner peripheral side of the molten steel flow hole (20) is a porous brick. (9) Comprising the porous brick (9)
The outer periphery, the upper part and the lower part of the are surrounded by castable refractories (8), and an inert gas pool (11) is provided between the porous bricks (9) and the castable refractories (8) in the axial direction, and the pool is formed. A porous nozzle for a molten metal container, characterized in that an inert gas is supplied to (11).
JP5793292U 1992-08-18 1992-08-18 Porous nozzle for molten metal container Pending JPH0619966U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5793292U JPH0619966U (en) 1992-08-18 1992-08-18 Porous nozzle for molten metal container

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5793292U JPH0619966U (en) 1992-08-18 1992-08-18 Porous nozzle for molten metal container

Publications (1)

Publication Number Publication Date
JPH0619966U true JPH0619966U (en) 1994-03-15

Family

ID=13069793

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5793292U Pending JPH0619966U (en) 1992-08-18 1992-08-18 Porous nozzle for molten metal container

Country Status (1)

Country Link
JP (1) JPH0619966U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012101250A (en) * 2010-11-10 2012-05-31 Kurosaki Harima Corp Gas blowing nozzle
JP2012115896A (en) * 2010-12-03 2012-06-21 Kurosaki Harima Corp Method for mounting metal case on nozzle for gas blowing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012101250A (en) * 2010-11-10 2012-05-31 Kurosaki Harima Corp Gas blowing nozzle
JP2012115896A (en) * 2010-12-03 2012-06-21 Kurosaki Harima Corp Method for mounting metal case on nozzle for gas blowing

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