JPH0721755U - Lance for immersion of molten steel - Google Patents

Lance for immersion of molten steel

Info

Publication number
JPH0721755U
JPH0721755U JP5551693U JP5551693U JPH0721755U JP H0721755 U JPH0721755 U JP H0721755U JP 5551693 U JP5551693 U JP 5551693U JP 5551693 U JP5551693 U JP 5551693U JP H0721755 U JPH0721755 U JP H0721755U
Authority
JP
Japan
Prior art keywords
molten steel
lance
cored bar
dipping
immersion
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.)
Withdrawn
Application number
JP5551693U
Other languages
Japanese (ja)
Inventor
田 修 池
村 康 之 河
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.)
Kobe Steel Ltd
Original Assignee
Kobe Steel 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 Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to JP5551693U priority Critical patent/JPH0721755U/en
Publication of JPH0721755U publication Critical patent/JPH0721755U/en
Withdrawn legal-status Critical Current

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  • Treatment Of Steel In Its Molten State (AREA)

Abstract

(57)【要約】 【構成】全周を耐火物により被覆され、かつ、先端部に
複数の吹き出しノズルを有する芯金の内部に、吹き出し
ノズルより上に複数の長いヒレが放射状に全長に取り付
けられている円筒ダミーが設置されている。 【効果】芯金に対する冷却が強化され、かつ、強度が向
上し、芯金の曲がりによるランスの寿命を延長できる。
(57) [Summary] [Structure] Inside the core metal, which is covered with a refractory all around and has a plurality of blowing nozzles at the tip, multiple long fins are radially attached to the entire length above the blowing nozzle. A cylindrical dummy is installed. [Effect] The cooling of the cored bar is enhanced, the strength is improved, and the life of the lance due to the bending of the cored bar can be extended.

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]

本考案は溶鋼浸漬用ランスに関し、さらに詳しくは、溶鋼の成分調整のため、 溶鋼内に粉体圧送およびアルゴンを吹き込むための溶鋼浸漬用ランスに関するも のである。 The present invention relates to a molten steel dipping lance, and more particularly to a molten steel dipping lance for feeding powder and blowing argon into the molten steel to adjust the composition of the molten steel.

【0002】[0002]

【従来技術】[Prior art]

従来より、溶鋼の成分の調整のため、溶鋼内にランスを浸漬させて、このラン スから成分調整用粉体およびアルゴン等の吹き込みが行われて来ている。例えば 、ランスとしては、溶鋼加熱精錬設備におけるインジェクション用ランスまたは アルゴンバブリング用ランスがある。 Conventionally, in order to adjust the composition of the molten steel, a lance is immersed in the molten steel, and the powder for adjusting the composition and argon are blown from this lance. For example, the lance may be an injection lance or an argon bubbling lance in a molten steel heating and refining facility.

【0003】 この従来のランス10について、図3に示す例により説明する。即ち、芯金2 (厚肉鋼管)に溶鋼浸漬部分の全周には耐火物5が被覆されており、この耐火物 5および芯金2の先端に吹き出しノズル6が複数設けられている構造である。The conventional lance 10 will be described with reference to the example shown in FIG. That is, the refractory 5 is coated on the entire circumference of the molten steel dipping portion of the cored bar 2 (thick steel pipe), and a plurality of blowing nozzles 6 are provided at the tips of the refractory 5 and the cored bar 2. is there.

【0004】 そして、図4に示すように、溶鋼過熱精錬設備の配置制約上、ランス10は斜 め上から溶鋼鍋7の溶鋼鍋蓋8に穿孔されている穴から溶鋼9に浸漬されること が多く、ランス10の溶鋼9に浸漬されている浸漬部分は浮力による曲げモーメ ントを受ける。As shown in FIG. 4, the lance 10 is immersed in the molten steel 9 through the hole formed in the molten steel ladle lid 8 of the molten steel ladle 7 from the upper side due to the arrangement restriction of the molten steel overheating refining equipment. Since the lance 10 is immersed in the molten steel 9, the lance 10 is subjected to bending moment due to buoyancy.

【0005】 そのため、芯金2は強度を必要とするので、内径が大きく、従って、芯金2内 部を通過する流体1の流速は一般的に遅いため、芯金2の冷却効果が低く、かつ 、芯金2が高温になり、強度を失い、曲がるという問題がある。Therefore, since the cored bar 2 needs strength, the inner diameter is large, and therefore the flow velocity of the fluid 1 passing through the inner part of the cored bar 2 is generally low, so that the cooling effect of the cored bar 2 is low. Moreover, there is a problem that the cored bar 2 becomes hot, loses strength, and bends.

【0006】[0006]

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

本考案は上記に説明した従来における溶鋼浸漬用ランスの問題点を解決するた めに、本考案者が鋭意研究を行った結果、溶鋼にランスを浸漬しても芯金が高温 になることがなく、また、浮力による曲がることがない溶鋼浸漬用ランスを開発 したまである。 In order to solve the above-mentioned problems of the conventional lance for immersion in molten steel, the present invention has been earnestly studied by the present inventor, and as a result, even if the lance is immersed in molten steel, the core metal becomes hot. There is a lance for immersion in molten steel that does not bend and does not bend due to buoyancy.

【0007】[0007]

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

本考案に係る溶鋼浸漬用ランスの特徴とするところは、 全周を耐火物により被覆され、かつ、先端部に複数の吹き出しノズルを有する 芯金の内部に、吹き出しノズルより上に複数の長いヒレが放射状に全長に取り付 けられている円筒ダミーが設置されていることにある。 The feature of the molten steel dipping lance according to the present invention is that the entire circumference is covered with a refractory and a tip has a plurality of blowing nozzles. There is a cylindrical dummy that is radially attached to the entire length.

【0008】 本考案に係る溶鋼浸漬用ランスについて、以下具体的に説明する。The molten steel dipping lance according to the present invention will be specifically described below.

【0009】 本考案に係る溶鋼浸漬用ランスについて、図面に示す例により説明すると、図 1は本考案に係る溶鋼浸漬用ランスの縦断面図であり、図2は図1の切断面を示 す図である。The molten steel dipping lance according to the present invention will be described with reference to the example shown in the drawings. FIG. 1 is a vertical sectional view of the molten steel dipping lance according to the present invention, and FIG. 2 shows a cut surface of FIG. It is a figure.

【0010】 図1において、溶鋼浸漬用ランス10は、芯金2の溶鋼浸漬部分に耐火物が全 周にわたり被覆されており、この芯金2の先端部には吹き出しノズル6が複数設 けられている。In FIG. 1, a molten steel dipping lance 10 has a refractory material covering the molten steel dipping portion of a cored bar 2 over the entire circumference thereof, and a plurality of blowing nozzles 6 are provided at the tip of the cored bar 2. ing.

【0011】 そして、芯金2の内部には、芯金2先端部の吹き出しノズルより上に、芯金2 の内径に挿入可能な外径を有する複数のヒレ4を吹き出しノズル6より上全長に わたり放射状に設けられている円筒ダミー3が設置されている。Inside the cored bar 2, a plurality of fins 4 having an outer diameter that can be inserted into the inner diameter of the cored bar 2 are provided above the blowout nozzle at the tip of the cored bar 2 over the entire length above the discharge nozzle 6. Cylindrical dummies 3 that are radially provided are installed.

【0012】 このような構成を有する溶鋼浸漬用ランス10は、図4に示す溶鋼鍋7の溶鋼 鍋蓋8に穿孔されている穴から溶鋼鍋7内の溶鋼9中に斜めに浸漬され、次いで 、成分調整のための粉体およびアルゴンガス等の流体1を、芯金2内に設置され ているヒレを有する円筒ダミー3を通過してから吹き出しノズル6を通り溶鋼9 中に吹き込まれるのである。The molten steel dipping lance 10 having such a configuration is obliquely dipped into the molten steel 9 in the molten steel ladle 7 through a hole formed in the molten steel ladle lid 8 of the molten steel ladle 7 shown in FIG. The powder 1 for adjusting the components and the fluid 1 such as argon gas are blown into the molten steel 9 through the blow nozzle 6 after passing through the cylindrical dummy 3 having fins installed in the core metal 2. .

【0013】 しかして、この場合流体1は芯金2の上部入り口近傍では流速は遅く、放射状 にヒレ4が設けられている円筒ダミー3により流路面積が絞られているので流速 は速くなり、従って、冷却能力が高くなるので、芯金2の温度上昇を抑制するこ とができる。さらに、内側に挿入された円筒ダミー3は、常時流体により冷却さ れているので芯金2の曲がることに対しての強度部材となる。In this case, however, the flow velocity of the fluid 1 is low near the upper entrance of the core metal 2, and the flow velocity is high because the flow passage area is narrowed by the cylindrical dummy 3 provided with the fins 4 radially. Therefore, since the cooling capacity is increased, the temperature rise of the cored bar 2 can be suppressed. Further, since the cylindrical dummy 3 inserted inside is always cooled by the fluid, it serves as a strength member against bending of the core metal 2.

【0014】 なお、放射状にヒレ4が設けられている円筒ダミー3を芯金2内に挿入するこ とにより、流体1の流速を5.5〜11m/sとすると、約1.7倍の冷却能を向 上させることができる。従って、芯金2の温度上昇を抑制することができ、冷却 が強化され芯金2の曲がりを防止できる。When the flow velocity of the fluid 1 is set to 5.5 to 11 m / s by inserting the cylindrical dummy 3 in which the fins 4 are radially provided into the core metal 2, the flow rate is about 1.7 times. The cooling capacity can be improved. Therefore, the temperature rise of the cored bar 2 can be suppressed, the cooling is enhanced, and the bending of the cored bar 2 can be prevented.

【0015】[0015]

【考案の効果】[Effect of device]

以上説明したように、本考案に係る溶鋼浸漬用ランスは上記に構成であるから 、芯金に対する冷却が強化され、かつ、強度が向上し、芯金の曲がりによるラン スの寿命を延長できるという優れた効果を有する。 As described above, since the molten steel immersion lance according to the present invention is configured as described above, cooling of the cored bar is enhanced, strength is improved, and the life of the lance due to bending of the cored bar can be extended. Has excellent effect.

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

【図1】本考案に係る溶鋼浸漬用ランスの縦断面図であ
る。。
FIG. 1 is a vertical sectional view of a lance for dipping molten steel according to the present invention. .

【図2】図1の横断面図である。2 is a cross-sectional view of FIG.

【図3】従来の溶鋼浸漬用ランスの縦断面図である。FIG. 3 is a vertical cross-sectional view of a conventional molten steel dipping lance.

【図4】溶鋼浸漬用ランスの使用状況を示す断面図であ
る。
FIG. 4 is a cross-sectional view showing a usage state of a molten steel dipping lance.

【符号の説明】[Explanation of symbols]

1・・・流体 2・・・芯金 3・・・円筒ダミー 4・・・ヒレ 5・・・耐火物 6・・・吹き出しノズル 7・・・溶鋼鍋 8・・・溶鋼鍋蓋 9・・・溶鋼 10・・浸漬ランス 1 ... Fluid 2 ... Mandrel 3 ... Cylindrical dummy 4 ... Fin 5 ... Refractory 6 ... Blow-off nozzle 7 ... Molten steel pot 8 ... Molten steel pot lid 9 ...・ Molten steel 10 ・ ・ Dip lance

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】全周を耐火物により被覆され、かつ、先端
部に複数の吹き出しノズルを有する芯金の内部に、吹き
出しノズルより上に複数の長いヒレが放射状に全長に取
り付けられている円筒ダミーが設置されていることを特
徴とする溶鋼浸漬用ランス。
1. A cylinder in which a plurality of long fins are radially attached to the entire length above a blowing nozzle inside a cored bar having a plurality of blowing nozzles at its tip end, which is covered with a refractory material. A lance for dipping molten steel, which is equipped with a dummy.
JP5551693U 1993-09-20 1993-09-20 Lance for immersion of molten steel Withdrawn JPH0721755U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5551693U JPH0721755U (en) 1993-09-20 1993-09-20 Lance for immersion of molten steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5551693U JPH0721755U (en) 1993-09-20 1993-09-20 Lance for immersion of molten steel

Publications (1)

Publication Number Publication Date
JPH0721755U true JPH0721755U (en) 1995-04-21

Family

ID=13000872

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5551693U Withdrawn JPH0721755U (en) 1993-09-20 1993-09-20 Lance for immersion of molten steel

Country Status (1)

Country Link
JP (1) JPH0721755U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008121072A (en) * 2006-11-13 2008-05-29 Tokyo Yogyo Co Ltd Lance pipe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008121072A (en) * 2006-11-13 2008-05-29 Tokyo Yogyo Co Ltd Lance pipe

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Legal Events

Date Code Title Description
A300 Withdrawal of application because of no request for examination

Free format text: JAPANESE INTERMEDIATE CODE: A300

Effective date: 19980305