JP2530100Y2 - Gas injection nozzle for molten metal stirring - Google Patents
Gas injection nozzle for molten metal stirringInfo
- Publication number
- JP2530100Y2 JP2530100Y2 JP9124890U JP9124890U JP2530100Y2 JP 2530100 Y2 JP2530100 Y2 JP 2530100Y2 JP 9124890 U JP9124890 U JP 9124890U JP 9124890 U JP9124890 U JP 9124890U JP 2530100 Y2 JP2530100 Y2 JP 2530100Y2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- distribution box
- refractory
- injection nozzle
- molten metal
- 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.)
- Expired - Lifetime
Links
Landscapes
- Furnace Charging Or Discharging (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Description
【考案の詳細な説明】 産業上の利用分野 本考案は、転炉、電炉、取鍋、取鍋精錬炉の容器底部
からガスを吹き出し、溶融金属を精錬する溶融金属攪拌
用ガス吹き込みノズルに関する。DETAILED DESCRIPTION OF THE INVENTION INDUSTRIAL APPLICATION FIELD The present invention relates to a gas injection nozzle for agitating molten metal, which blows out gas from a container bottom of a converter, an electric furnace, a ladle, and a ladle refining furnace to refine the molten metal.
従来の技術 転炉や電炉の底部からガスを吹き込む溶融金属攪拌用
ガス吹き込みノズル1としては、第4図のようにガス吹
き込み用のガス導入用細管2の下端部をガス分配箱3の
上蓋4に連通し、このガス導入用細管2を耐火物5中に
埋設したものが知られている。2. Description of the Related Art As a gas injection nozzle 1 for agitating molten metal for injecting gas from the bottom of a converter or an electric furnace, a lower end of a gas introduction thin tube 2 for gas injection is connected to an upper cover 4 of a gas distribution box 3 as shown in FIG. The gas introduction thin tube 2 is buried in a refractory 5.
従来の上記した溶融金属攪拌用ガス吹き込みノズル1
は、ガス導入用細管2の下端部をガス分配箱3の上蓋4
に溶接し、このガス導入用細管2のまわりに耐火物5を
プレス成形で一体的に成形し、キュアリング後にガス分
配箱3の箱本体6を上蓋4に溶接して製造しているもの
であった。Conventional gas injection nozzle 1 for stirring molten metal as described above
The lower end of the gas introduction thin tube 2 is connected to the upper lid 4 of the gas distribution box 3.
The refractory 5 is integrally formed around the gas introduction thin tube 2 by press molding, and after curing, the box body 6 of the gas distribution box 3 is welded to the upper lid 4. there were.
考案が解決しようとする課題 しかし、上記溶融金属攪拌用ガス吹き込みノズルは、
多段の工程の組合せで製造しているので、低い技術の組
合せで容易に製造できる特徴があるが、以下のような欠
点がある。Problems to be Solved by the Invention However, the gas injection nozzle for stirring molten metal,
Since it is manufactured by a combination of multiple steps, it can be easily manufactured by a combination of low technologies, but has the following disadvantages.
1.プレス成形、キュアリング、X線テスト後に、さらに
溶接を行うためガス分配箱の上蓋部分が高温になり、炭
素や結合樹脂を含む耐火物が酸化や熱変質を受け、強度
を失ったり、亀裂が発生したりするおそれがあった。ま
た、長時間かつ丁寧に溶接作業をしても、耐火物を熱変
質させないことは不可能であった。1. After press forming, curing, and X-ray test, the upper lid of the gas distribution box becomes hot to perform welding, and refractories including carbon and binder resin undergo oxidation or thermal deterioration, and lose strength. There was a possibility that cracks would occur. Further, even if welding work is performed carefully for a long time, it is impossible to prevent the refractory from being thermally deteriorated.
2.ガス分配箱が溶接作業中に大きく変形するおそれがあ
り、これを防ぐためガス分配箱の材質を吟味したり、板
厚を不経済なほど厚くする必要があった。2. The gas distribution box may be greatly deformed during welding work. To prevent this, it was necessary to examine the material of the gas distribution box and make the plate thickness uneconomical.
3.熱変質を回避するため丁寧な溶接作業はできないの
で、ガスの洩れテストを丁寧に行う必要があった。3. Careful welding work was not possible to avoid thermal deterioration, so it was necessary to conduct a gas leak test carefully.
4.電気製鋼炉の底部で使用する場合、誘導電流による赤
熱やスパーク事故を防ぐために金属部を耐火断熱材で被
覆する必要があるが、ガス分配箱がガス吹き込みノズル
の底部に突き出しているので耐火断熱材の取り付けが面
倒であった。4.When used at the bottom of an electric steelmaking furnace, it is necessary to cover the metal part with fireproof insulation to prevent red heat and spark accidents due to induced current, but the gas distribution box protrudes from the bottom of the gas injection nozzle. Installation of fireproof insulation was troublesome.
課題を解決するための手段 本考案は上記のような点に鑑みたもので、上記の課題
を解決するために、ガス分配箱にガス吹き込みの金属の
ガス導入用細管を多数立設して、ガス導入用細管を耐火
物中に埋設した溶融金属攪拌用ガス吹き込みノズルにお
いて、ガス導入用細管をガス分配箱の上蓋に気密的に溶
接して取り付け、このガス分配箱の底部にガス供給管を
気密的に一体化して取り付けており、上記ガス導入用細
管のまわりからガス分配箱の周面全体または側周面の大
部分にわたって耐火物を冷間等圧プレス成形で一体的に
装着したことを特徴とする溶融金属攪拌用ガス吹き込み
ノズルを提供するにある。Means for Solving the Problems The present invention has been made in view of the above points, and in order to solve the above problems, a number of thin gas introducing metal gas introducing tubes are installed in a gas distribution box, In a gas injection nozzle for agitating molten metal in which a gas introduction thin tube is embedded in a refractory, the gas introduction thin tube is hermetically welded to an upper cover of a gas distribution box, and a gas supply tube is provided at the bottom of the gas distribution box. It is airtightly integrated and attached, and the refractory is integrally mounted by cold isobar press molding over the entire peripheral surface of the gas distribution box or most of the side peripheral surface from around the gas introduction thin tube. It is another object of the present invention to provide a gas injection nozzle for stirring molten metal.
作用 本考案によれば、予めガス導入用細管、ガス供給管、
ガス分配箱を気密的に一体的に取り付けていることによ
って、プレス成形による耐火物装着後の溶接工程を全廃
でき、ガス吹き込みノズルの底部の耐火物が熱変質した
り、酸化したりして損傷するのを防止できる。そして、
耐火物装着前に溶接歪の焼鈍除去が行え、溶接のガス洩
れ試験ができる。According to the present invention, a gas introduction tube, a gas supply tube,
By installing the gas distribution box in an airtight manner, the welding process after mounting the refractory by press forming can be completely eliminated, and the refractory at the bottom of the gas injection nozzle is damaged due to thermal deterioration or oxidation. Can be prevented. And
Annealing of welding distortion can be performed before refractory is attached, and welding gas leakage test can be performed.
また、ガス吹き込みノズルのガス分配箱の周面全体ま
たは側周面の大部分にわたって耐火物を冷間等圧プレス
成形で一体的に装着することによって、耐火物を均一に
装着でき、かつノズル底面が平坦状またはほぼ平坦状に
なり、ノズル底面に耐火断熱材を簡単に被覆することが
できる。In addition, the refractory can be mounted uniformly by cold isobar press molding over the entire peripheral surface of the gas distribution box or a large part of the side peripheral surface of the gas injection nozzle, so that the refractory can be uniformly mounted and the nozzle bottom surface. Becomes flat or almost flat, and the bottom surface of the nozzle can be easily covered with the refractory heat insulating material.
実施例 以下、本考案を実施例にもとづいて説明する。第1図
〜第3図は、本考案の一実施例である。転炉や電気炉等
の溶融金属攪拌用のガス吹き込みノズル11は、第1図の
ように多数の細径の金属のガス導入用細管12の下端部を
円盤状のガス分配箱13の上蓋14にそれぞれ溶接して連通
しており、ガス分配箱13の底部にガス供給管15を一体的
に取り付け、このように一体化したガス導入用細管12の
上端からガス分配箱13の下端にわたって所定の耐火物16
を装着して形成している。特に、ガス導入用細管12、ガ
ス分配箱13、ガス供給管15を耐火物装着後に溶接するこ
となく、予め完全に気密に一体化して構成したガス吹き
込みノズル11であることを特徴としている。Embodiment Hereinafter, the present invention will be described based on an embodiment. 1 to 3 show an embodiment of the present invention. As shown in FIG. 1, a gas injection nozzle 11 for stirring molten metal, such as a converter or an electric furnace, is provided with a lower end of a large number of small-diameter metal gas introduction tubes 12 as shown in FIG. The gas supply pipe 15 is integrally attached to the bottom of the gas distribution box 13, and a predetermined portion is provided from the upper end of the gas introduction thin tube 12 thus integrated to the lower end of the gas distribution box 13. Refractory 16
Is formed. In particular, the gas injection nozzle 11 is configured such that the gas introduction thin tube 12, the gas distribution box 13, and the gas supply tube 15 are completely air-tightly integrated in advance without welding after the refractory is attached.
すなわち、ガス分配箱13の上蓋14に所定径の連通孔17
を放射状等に多数開孔し、第2図のようにこの連通孔17
にガス導入用細管12の下端部をそれぞれ挿入して上蓋14
の裏側でそれぞれ気密的に溶接して固着している。そし
て、図示のようにガス分配箱13の底部にガス供給管15を
溶接して接続したガス分配箱13の箱本体18に上記上蓋14
を接合し、上蓋14の周囲を気密的にガス分配箱13に溶接
して一体化している。That is, a communication hole 17 having a predetermined diameter is formed in the upper lid 14 of the gas distribution box 13.
Many holes are formed radially or the like, and as shown in FIG.
The lower end of the gas introduction thin tube 12 is inserted into
Are hermetically welded and fixed on the back side. As shown in the figure, the upper cover 14 is attached to a box body 18 of the gas distribution box 13 in which a gas supply pipe 15 is welded and connected to the bottom of the gas distribution box 13.
And the periphery of the upper lid 14 is air-tightly welded to the gas distribution box 13 to be integrated.
上記の溶接時に熱歪を生じた場合には、たとえば600
〜800℃で焼鈍したりして歪みを取り去る。If heat distortion occurs during the above welding, for example, 600
Anneal at ~ 800 ° C to remove distortion.
また、ガス導入用細管12の上端にそれぞれ栓19を溶接
して取り付け、ガス供給管15から10kg/cm2圧の空気また
は水を加圧して洩れテストを行い、洩れがないことを確
認する。Further, a plug 19 is welded and attached to the upper end of the gas introduction thin tube 12, respectively, and air or water at a pressure of 10 kg / cm 2 is pressurized from the gas supply tube 15 to perform a leak test to confirm that there is no leak.
このように、熱歪がなく、洩れがなく、ガス導入用細
管12、ガス分配箱13、ガス供給管15を一体化したものに
耐火物16を冷間等圧プレス成形で装着するものである。As described above, there is no thermal distortion, no leakage, and the refractory 16 is mounted by cold isostatic pressing on a united gas introduction tube 12, gas distribution box 13, and gas supply tube 15. .
たとえば、第3図のように中央に挿入孔20を設けた鋼
製の底ブロック21にバンド22で取り付けた冷間等圧成形
のゴムモールド23に上記したガス供給管15を挿入孔20に
挿入してガス導入用細管12、ガス分配箱13の一体物を設
置し、上部から所定の耐火物坏土を投入して均一にゴム
モールド23内に充填する。耐火物坏土の投入にあたって
は、タッピング機等の振動充填機を利用できる。耐火物
坏土を十分に充填した後、図のようにゴムモールド23の
上部に鋼製の蓋体24を取り付け、バンド25でゴムモール
ド23に固定する。For example, the above-mentioned gas supply pipe 15 is inserted into the insertion hole 20 in a cold isobar molding rubber mold 23 attached to a steel bottom block 21 having an insertion hole 20 in the center as shown in FIG. Then, an integrated body of the gas introduction thin tube 12 and the gas distribution box 13 is installed, and a predetermined refractory clay is poured from above to uniformly fill the rubber mold 23. When charging the refractory clay, a vibration filling machine such as a tapping machine can be used. After the refractory clay is sufficiently filled, a steel lid 24 is attached to the upper part of the rubber mold 23 as shown in the figure, and fixed to the rubber mold 23 with a band 25.
蓋体24に取り付けたフック26で吊るして冷間等圧プレ
スの圧力容器(図示せず)に挿入し、約1000kg/cm2の圧
力で30秒程度加圧する。耐火物を均一に装着した成形体
を取り出した後、キュアリングし、旋盤で成形体の外周
面を所定寸法に切削仕上げする。It is hung by a hook 26 attached to the lid 24, inserted into a pressure vessel (not shown) of a cold constant pressure press, and pressurized at a pressure of about 1000 kg / cm 2 for about 30 seconds. After taking out the molded body on which the refractory is uniformly attached, the molded body is cured, and the outer peripheral surface of the molded body is cut and finished to a predetermined size by a lathe.
そして、水圧テストで洩れのないことを際確認し、成
形体の先端部を切断して第1図のガス吹き込みノズル11
を得るものである。Then, it was confirmed by a water pressure test that there was no leakage, and the tip of the molded body was cut off to cut the gas injection nozzle 11 shown in FIG.
Is what you get.
したがって、本考案のガス吹き込みノズルでは、耐火
物装着前に必要な全溶接工程を行えるとともに、丁寧
に、確実に溶接作業が行えるのでガス洩れのない製品が
得られ、耐火物装着後の溶接工程をなくすることができ
るので、底部の耐火物の熱変質や酸化したりして品質が
劣化することなく、品質の向上がはかれる。Therefore, the gas injection nozzle of the present invention can perform all necessary welding processes before mounting the refractory, and can perform welding work carefully and reliably, so that a product without gas leakage can be obtained. Therefore, the quality can be improved without deterioration of the quality due to thermal deterioration or oxidation of the bottom refractory.
上記実施例では、ガス吹き込みノズルにガス導入用細
管を貫通状態としたものについて説明したが、ガス導入
用細管の上部がガス吹き込みノズル内に所定量埋設した
ものについても適用できるものである。In the above-described embodiment, the gas introducing nozzle is described as having the gas introducing thin tube penetrating therethrough, but the present invention is also applicable to a gas introducing nozzle in which the upper part of the gas introducing nozzle is embedded in the gas blowing nozzle by a predetermined amount.
また上記実施例では、ガス吹き込みノズルの底部にガ
ス分配箱を埋設してその底面がノズル底面と面一状とし
てノズル底面を耐火断熱材で簡単に被覆できるようにし
ているが、ガス分配箱の側周面の大部分にわたって埋設
するようにしたものであってもよい。Further, in the above embodiment, the gas distribution box is buried at the bottom of the gas injection nozzle so that the bottom surface is flush with the nozzle bottom surface so that the nozzle bottom surface can be easily covered with the fireproof heat insulating material. It may be buried over most of the side peripheral surface.
考案の効果 以上のように本考案にあっては、ガス導入用細管をガ
ス分配箱にガス洩れが生じることなく気密的に確実に溶
接しておける。そして、溶接して一体化したガス導入用
細管、ガス分配箱、ガス供給管のまわりに冷間等圧プレ
ス成形で耐火物を均一状に装着でき、耐火物を下部のガ
ス分配箱のまわりにも装着するにもかかわらず、ガス吹
き込みノズルの耐火物を装着後に溶接工程を全廃できる
ので、ノズル底部の耐火物が溶接によって熱変質した
り、酸化して変質するのを防止でき、品質のよいガス吹
き込みノズルを得ることができる。Effects of the Invention As described above, in the present invention, the gas introduction thin tube can be securely and air-tightly welded to the gas distribution box without gas leakage. Then, the refractory can be uniformly installed around the gas introduction tube, gas distribution box, and gas supply tube that are integrated by welding by cold isobar pressing, and the refractory is placed around the lower gas distribution box. Despite the installation, the welding process can be completely abolished after installing the refractory of the gas injection nozzle, so that the refractory at the bottom of the nozzle can be prevented from being thermally deteriorated by welding or from being oxidized and deteriorated. A gas blowing nozzle can be obtained.
第1図は本考案の一実施例の側断面図、第2図は同上の
耐火物装着前のガス導入用細管、ガス分配箱、ガス供給
管の一体物の側断面図、第3図は同上の冷間等圧プレス
成形説明用断面図、第4図は従来例の側断面図である。 11……ガス吹き込みノズル、12……ガス導入用細管、13
……ガス分配箱、14……上蓋、15……ガス供給管、16…
…耐火物。FIG. 1 is a side sectional view of one embodiment of the present invention, FIG. 2 is a side sectional view of an integral unit of a gas introduction tube, a gas distribution box, and a gas supply tube before the same refractory is attached. FIG. 4 is a cross-sectional view for explaining cold isostatic press forming, and FIG. 4 is a side cross-sectional view of a conventional example. 11 ... Gas injection nozzle, 12 ... Gas introduction thin tube, 13
... gas distribution box, 14 ... top lid, 15 ... gas supply pipe, 16 ...
… Refractory.
Claims (1)
入用細管を多数立設して、ガス導入用細管を耐火物中に
埋設した溶融金属攪拌用ガス吹き込みノズルにおいて、 ガス導入用細管をガス分配箱の上蓋に気密的に溶接して
取り付け、このガス分配箱の底部にガス供給管を気密的
に一体化して取り付けており、 上記ガス導入用細管のまわりからガス分配箱の周面全体
または側周面の大部分にわたって耐火物を冷間等圧プレ
ス成形で一体的に装着したことを特徴とする溶融金属攪
拌用ガス吹き込みノズル。1. A gas injection nozzle for agitating a molten metal in which a plurality of gas-injecting metal thin tubes are erected in a gas distribution box and the gas-introducing thin tubes are embedded in a refractory. A gas supply pipe is hermetically welded and attached to the top lid of the gas distribution box, and a gas supply pipe is integrally attached to the bottom of the gas distribution box in an airtight manner. Alternatively, a gas injection nozzle for agitating a molten metal, wherein a refractory is integrally mounted over a large part of a side peripheral surface by cold isobar press molding.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9124890U JP2530100Y2 (en) | 1990-08-30 | 1990-08-30 | Gas injection nozzle for molten metal stirring |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9124890U JP2530100Y2 (en) | 1990-08-30 | 1990-08-30 | Gas injection nozzle for molten metal stirring |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0450400U JPH0450400U (en) | 1992-04-28 |
JP2530100Y2 true JP2530100Y2 (en) | 1997-03-26 |
Family
ID=31826702
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9124890U Expired - Lifetime JP2530100Y2 (en) | 1990-08-30 | 1990-08-30 | Gas injection nozzle for molten metal stirring |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2530100Y2 (en) |
-
1990
- 1990-08-30 JP JP9124890U patent/JP2530100Y2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0450400U (en) | 1992-04-28 |
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