JPH09104916A - Immersion pipe for vacuum degassing device - Google Patents
Immersion pipe for vacuum degassing deviceInfo
- Publication number
- JPH09104916A JPH09104916A JP28449095A JP28449095A JPH09104916A JP H09104916 A JPH09104916 A JP H09104916A JP 28449095 A JP28449095 A JP 28449095A JP 28449095 A JP28449095 A JP 28449095A JP H09104916 A JPH09104916 A JP H09104916A
- Authority
- JP
- Japan
- Prior art keywords
- steel
- vacuum degassing
- immersion pipe
- welding
- cored bar
- 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.)
- Granted
Links
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、真空脱ガス装置の浸漬
管の耐用寿命を延長することを目的として成された真空
脱ガス装置用浸漬管に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dip tube for a vacuum degassing apparatus, which is intended to extend the service life of the dipping tube of the vacuum degassing apparatus.
【０００２】[0002]
【従来の技術】近年、量産鋼の高級化が進んでおり、真
空精錬やこれに代わる炉外精錬等の各種特殊精錬法が採
用されている。その中でも真空精錬では、ＤＨ法，ＲＨ
法などの吸上式真空精錬法が最も一般的に採用されてい
る。このＤＨ法，ＲＨ法は、真空槽の下端に浸漬管と呼
ばれる吸上管をそなえた真空脱ガス装置を用い、溶鋼を
浸漬管で吸い上げ、真空と接触させ、鋼中の脱ガスを行
う方法である。図１はＲＨ法真空脱ガス装置の構造例を
示し、図２に、真空脱ガス装置用浸漬管の従来構造例を
示している。この浸漬管２１は、円筒形状をなす鉄皮芯
金２２の下部の内側方向に突出する定形れんが支持部２
３をそなえていて、この定形れんが２４の内部に、溶鋼
流路２５を形成していると共に、前記円筒形状をなす鉄
皮芯金２２の外側に、複数のアンカー２６をそなえ、鉄
皮芯金２２と、内側定形れんが２４との間に、不定形耐
火物２７を充填すると共に、鉄皮芯金２２の外側と、下
方に不定形耐火物２８を設けた構造を有している。そし
て、一般的には、浸漬管に使用される不定形耐火物は、
ハイアルミナ質キャスタブルを用いる構造となってい
る。2. Description of the Related Art In recent years, mass production of steel has been advanced, and various special refining methods such as vacuum refining and alternative refining outside the furnace have been adopted. Among them, in vacuum refining, DH method, RH method
A suction vacuum refining method such as a vacuum method is most commonly employed. The DH method and the RH method use a vacuum degassing device that has a suction tube called a dip tube at the lower end of a vacuum chamber, suck up molten steel with a dip tube, and bring it into contact with vacuum to degas the steel. Is. FIG. 1 shows an example of the structure of an RH method vacuum degassing apparatus, and FIG. 2 shows an example of a conventional structure of a dip tube for a vacuum degassing apparatus. The dip tube 21 has a fixed brick supporting portion 2 that protrudes inward from a lower portion of a cylindrical steel cored bar 22.
3, a molten steel flow path 25 is formed inside the regular brick 24, and a plurality of anchors 26 are provided on the outside of the iron cored bar 22 having the cylindrical shape. 22 and an inner fixed brick 24 are filled with an irregular refractory material 27, and an irregular refractory material 28 is provided outside the iron cored bar 22 and below. And, in general, the amorphous refractory used for the immersion pipe is
The structure uses castable high alumina.
【０００３】[0003]
【発明が解決しようとする課題】前記のような従来の真
空脱ガス装置用浸漬管２１は、溶鋼の表面と接する浸漬
管２１の下端部分が不定形耐火物で形成されており、侵
食が大きく、かつ、不定形耐火物が鉄皮芯金２２の膨張
により亀裂、欠落を生じ、内側れんがの残寸は大きく寿
命をまっとうせずして欠落により廃却に至ったり、補修
回数を多く必要とする問題点があって、耐用寿命を延長
させることが課題となっていた。In the conventional immersion pipe 21 for a vacuum degassing apparatus as described above, the lower end portion of the immersion pipe 21 which comes into contact with the surface of molten steel is formed of an amorphous refractory material, which causes large corrosion. Moreover, the irregular shaped refractory material is cracked or chipped due to the expansion of the iron cored bar 22, and the residual size of the inner brick is large, leading to the scrapping due to the lack of life, and a large number of repairs are required. However, there has been a problem in extending the service life.
【０００４】[0004]
【課題を解決するための手段】本発明の真空脱ガス装置
用浸漬管は、図３及び図４において、鉄皮芯金２２の最
下端部に鉄皮芯金２２の内部と外部に凸状をなす部分に
Ｖ字スタッドを溶接固定した構造（以下コルゲートスタ
ッド）をそなえており、更に鉄皮芯金２２下端部と同様
にリング状になっていることで下端部キャスタブルの亀
裂を抑制し、最下端部欠落による低耐用を解消すること
を特徴とする真空脱ガス装置用浸漬管である。3 and 4, the immersion pipe for a vacuum degassing apparatus according to the present invention has a convex shape inside and outside of the iron cored bar 22 at the lowermost end of the iron cored bar 22. It has a structure in which a V-shaped stud is welded and fixed to the part that forms the (corrugated stud), and it has a ring shape similar to the lower end of the iron cored bar 22 to suppress cracking of the castable at the lower end. It is a dip tube for a vacuum degassing device, which is characterized by eliminating low durability due to lack of the lowermost end.
【０００５】以下に本発明による真空脱ガス装置用浸漬
管を以下の実施例について詳しく説明する。Hereinafter, the immersion tube for a vacuum degassing apparatus according to the present invention will be described in detail with reference to the following examples.
【０００６】[0006]
【実施例】図３〜図５は本発明の実施例を示すものであ
る。先ず図３は鉄皮芯金２２下端部にφ６ｍｍの丸鋼を
鉄皮芯金の内部と外部にＲ７０ｍｍを付け波状に曲げ、
凸状をなす部分に内側から外側に向けてＶ字スタッド２
６を溶接固定したコルゲートスタッド３１を溶接固定し
た構造である。図４はこの浸漬管の下端部の水平断面を
示しており、図５はコルゲートスタッド３１のＶ字スタ
ッド２６の溶接部５１を示している。鋼材は全てＳＳ４
１を使用した。波状リングに加工したコルゲートスタッ
ド３１を鉄皮芯金２２の下端部に溶接固定したのち、不
定形耐火物２８を用いて真空脱ガス装置用浸漬管を築造
した。そして従来品と同様に充分乾燥した後、真空脱ガ
ス装置に装着して連続使用したところ従来品に比較して
３０％以上の耐用が得られた。3 to 5 show an embodiment of the present invention. First, in FIG. 3, a round steel of φ6 mm is attached to the lower end of the iron cored bar 22 with R70 mm inside and outside the iron cored bar and bent in a wavy shape.
V-shaped stud 2 from the inside to the outside in the convex part
This is a structure in which a corrugated stud 31 to which 6 is fixed by welding is fixed by welding. FIG. 4 shows a horizontal cross section of the lower end portion of this immersion pipe, and FIG. 5 shows a welded portion 51 of the V-shaped stud 26 of the corrugated stud 31. All steel materials are SS4
1 was used. A corrugated stud 31 processed into a corrugated ring was welded and fixed to the lower end of the steel cored bar 22, and then an amorphous pipe refractory 28 was used to construct a dipping pipe for a vacuum degassing apparatus. Then, after being sufficiently dried in the same manner as the conventional product, it was mounted in a vacuum degassing device and continuously used, and a durability of 30% or more was obtained as compared with the conventional product.
【０００７】[0007]
【発明の効果】以上のごとく、本発明の脱ガス装置用浸
漬管は鉄皮芯金の下端部に波状凹凸リングに加工し、Ｖ
字スタッドを交差させた構造を持つコルゲートスタッド
を溶接固定することにより、高温使用時に鉄芯とキャス
タブルとの熱膨張差で生ずる熱応力により、熱的スポー
リングきれつの発生と溶鋼侵入による不定形耐火物２８
の脱落、損傷が解消され、長時間の使用が可能となり、
耐用の安定に効果がある。As described above, the dipping pipe for a degassing apparatus of the present invention is processed into a wavy uneven ring at the lower end of the iron cored bar,
By fixing the corrugated studs with the structure that intersects the U-shaped studs by welding, the thermal stress caused by the difference in thermal expansion between the iron core and castable during high temperature use causes thermal spalling cracks and indefinite fire resistance due to molten steel intrusion. Object 28
Is removed, damage is eliminated, and long-term use is possible,
It is effective in stabilizing the service life.
【図１】真空脱ガス装置の構造縦断面図である。FIG. 1 is a structural vertical sectional view of a vacuum degassing apparatus.
【図２】従来品浸漬管の縦断面図である。FIG. 2 is a longitudinal sectional view of a conventional dip tube.
【図３】本発明浸漬管の縦断面図である。FIG. 3 is a longitudinal sectional view of the dip tube of the present invention.
【図４】本発明浸漬管の下端部横断面図である。FIG. 4 is a cross-sectional view of a lower end portion of the dip tube of the present invention.
【図５】本発明浸漬管に使用したコルゲートスタッドの
横断面図である。FIG. 5 is a cross-sectional view of a corrugated stud used in the immersion pipe of the present invention.
21 浸漬管 22 鉄皮芯金 23 れんが支持金物 24 れんが 25 フランジ 26 Ｖ字スタッド 27 不定形耐火物 28 不定形耐火物 29 ガス吹き込みパイプ 31 コルゲートスタッド 51 溶接固定部 21 Immersion pipe 22 Iron cored bar 23 Brick support metal 24 Brick 25 Flange 26 V-shaped stud 27 Irregular refractory 28 Irregular refractory 29 Gas blowing pipe 31 Corrugated stud 51 Welded fixing part
───────────────────────────────────────────────────── フロントページの続き (72)発明者 後藤 真一 愛知県東海市高横須賀町塩田１−４ タウ ンコートしおた103 (72)発明者 吉田 毅 岐阜県多治見市市之倉町２−297 (72)発明者 天野 正彦 愛知県東海市東海町５−３ 新日本製鐵株 式会社名古屋製鐵所内 (72)発明者 吉村 保彦 愛知県東海市東海町５−３ 新日本製鐵株 式会社名古屋製鐵所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Shinichi Goto 1-4 Shiono, Shiota, Takayokosuka-cho, Tokai City, Aichi Prefecture 103 (72) Inventor Takeshi Yoshida 2-297 Nokura-cho, Tajimi-shi, Gifu Prefecture ( 72) Inventor Masahiko Amano 5-3 Tokai-cho, Tokai-shi, Aichi Nippon Steel Co., Ltd. inside the Nagoya Steel Works (72) Inventor Yasuhiko Yoshimura 5-3 Tokai-cho, Tokai-shi, Aichi Nagoya Co., Ltd. Inside the steelworks
Claims (1)
んがをそなえ、前記定形れんがの内部に溶鋼流路を形成
していると共に、前記鉄皮芯金の外側に不定形耐火物を
そなえており、円筒形状をなす鉄皮芯金の下端部に内側
と外側を介在する様に波状に加工した丸鋼を溶接固定し
て、内、外部に突出した部分にＶ字スタッドを溶接固定
した構造をそなえていることを特徴とする真空脱ガス装
置用浸漬管。1. A fixed brick is provided inside a cylindrical iron cored bar, a molten steel flow path is formed inside the fixed brick, and an amorphous refractory is formed on the outer side of the iron cored bar. In addition, the round steel processed into a corrugated shape with the inner side and the outer side interposed by welding is fixed to the lower end of the cylindrical iron cored bar, and the V-shaped studs are fixed by welding to the inner and outer protruding parts. An immersion tube for a vacuum degassing device, which is characterized by having the above structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28449095A JP3303019B2 (en) | 1995-10-04 | 1995-10-04 | Immersion tube for vacuum degassing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28449095A JP3303019B2 (en) | 1995-10-04 | 1995-10-04 | Immersion tube for vacuum degassing equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09104916A true JPH09104916A (en) | 1997-04-22 |
| JP3303019B2 JP3303019B2 (en) | 2002-07-15 |
Family
ID=17679198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28449095A Expired - Fee Related JP3303019B2 (en) | 1995-10-04 | 1995-10-04 | Immersion tube for vacuum degassing equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3303019B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010168601A (en) * | 2009-01-20 | 2010-08-05 | Tokyo Yogyo Co Ltd | Dipping tube |
| JP2013231219A (en) * | 2012-05-01 | 2013-11-14 | Tokyo Yogyo Co Ltd | Immersed pipe of vacuum degassing apparatus |
-
1995
- 1995-10-04 JP JP28449095A patent/JP3303019B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010168601A (en) * | 2009-01-20 | 2010-08-05 | Tokyo Yogyo Co Ltd | Dipping tube |
| JP2013231219A (en) * | 2012-05-01 | 2013-11-14 | Tokyo Yogyo Co Ltd | Immersed pipe of vacuum degassing apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3303019B2 (en) | 2002-07-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20020319 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |