JPH0885817A - Gas blowing plug for molten metal vessel and its manufacture - Google Patents
Gas blowing plug for molten metal vessel and its manufactureInfo
- Publication number
- JPH0885817A JPH0885817A JP25151894A JP25151894A JPH0885817A JP H0885817 A JPH0885817 A JP H0885817A JP 25151894 A JP25151894 A JP 25151894A JP 25151894 A JP25151894 A JP 25151894A JP H0885817 A JPH0885817 A JP H0885817A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- plug
- molten metal
- gas injection
- gas blowing
- 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
- Treatment Of Steel In Its Molten State (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、冶金分野における溶融
金属攪拌のために使用するガス吹き込み用プラグおよび
その製造方法に関し、特にガスの吹き込み量を増加でき
て、攪拌効率を向上させることができ、しかも長寿命が
得られる溶融金属容器のガス吹き込みプラグおよびその
製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas blowing plug used for stirring molten metal in the field of metallurgy and a method for producing the same, and in particular, the amount of gas blowing can be increased to improve stirring efficiency. Moreover, the present invention relates to a gas injection plug for a molten metal container that can provide a long life and a method for manufacturing the same.
【０００２】[0002]
【従来の技術】近年、鋼材の品質を向上させるために、
溶融金属容器にガス吹き込み用のプラグを介してアルゴ
ン、窒素等の不活性ガスを吹き込んで溶融金属を攪拌
し、溶融金属の温度を均一化するとともに、非金属介在
物を除去することが増加している。2. Description of the Related Art In recent years, in order to improve the quality of steel materials,
An inert gas such as argon or nitrogen is blown into the molten metal container through a gas blowing plug to stir the molten metal to homogenize the temperature of the molten metal and remove non-metallic inclusions. ing.
【０００３】従来のガス吹き込み用のプラグとしては、
図５（ａ）に示すようなポ−ラスプラグ、図５（ｂ）に
示すような貫通孔プラグ、図５（ｃ）に示すようなソリ
ッドプラグ、図５（ｄ）に示すようなソッリドプラグ改
良品などが使用されている。As a conventional gas blowing plug,
A porous plug as shown in FIG. 5 (a), a through-hole plug as shown in FIG. 5 (b), a solid plug as shown in FIG. 5 (c), and an improved solid plug as shown in FIG. 5 (d). Are used.
【０００４】上記ポ−ラスプラグは、耐火物１の中央部
に多孔質れんが２を配設して、この多孔質れんが２から
ガスを出すプラグで、最も代表的な方法であり、現在で
は一番広く使用されている。The above-mentioned porous plug is a plug in which a porous brick 2 is arranged in the center of a refractory 1 and gas is emitted from this porous brick 2, which is the most typical method and is currently the most popular. Widely used.
【０００５】また、貫通孔プラグは、耐火物３内に０．
５〜０．８mm径の貫通孔４を設け、この貫通孔４からガ
スを出すプラグであり、最も溶損が少ない。Further, the through-hole plug has a resistance of 0.
A plug is provided with a through hole 4 having a diameter of 5 to 0.8 mm, and gas is emitted from the through hole 4, which has the least melting loss.
【０００６】ソリッドプラグは、メタルケ−ス５に装着
した耐火物６の外周部とメタルケ−ス５との間にガス吹
き込み用の間隙７を設け、この間隙７からガスを出すも
のである。The solid plug is provided with a gap 7 for blowing gas between the outer periphery of the refractory 6 mounted on the metal case 5 and the metal case 5, and the gas is discharged from the gap 7.
【０００７】ソリッドプラグ改良品は、耐火物８間に隙
間９を設け、この隙間９からガスを出すプラグである。The improved solid plug is a plug in which a gap 9 is provided between the refractories 8 and gas is discharged from the gap 9.
【０００８】[0008]
【発明が解決しようとする課題】しかし、ポ−ラスプラ
グでは多孔質部に溶鋼の浸透、剥離が繰り返されるの
で、溶損速度が大きいという欠点があり、貫通孔プラグ
では溶損速度は小さいが、多数の貫通孔を均一に設ける
のが困難であるという欠点がある。また、ガス吹き込み
回数が増加するにつれて貫通孔が溶鋼で詰まって、ガス
が出難くなるという致命傷をもつ。However, in the porous plug, the molten steel is repeatedly permeated and exfoliated in the porous portion, so that there is a drawback that the melting loss rate is high. In the through-hole plug, the melting loss rate is low, but There is a drawback that it is difficult to uniformly provide a large number of through holes. Further, as the number of gas injections increases, the through holes are clogged with molten steel, which makes it difficult for gas to come out, which is a fatal injury.
【０００９】ソリッドプラグでは、使用中にメタルケ−
ス自身が溶融凝固して、ガス吹き込み用の間隙を閉塞す
るためガスが出なくなるという欠点があり、ソリッドプ
ラグ改良品では、緻密質の耐火物間のギャップを確保す
るためにメタルで突部を作っているが、地金と濡れ易い
ため地金さしが起こり、ひどくなるとガス吹き込みがで
きなくなる。また、製造上、耐火物の隙間を最大でも２
層しかとれず、ガス量を十分に確保できないため、攪拌
の効率が非常に低い。With a solid plug, a metal cable is used during use.
There is a disadvantage that the gas itself does not come out because the gas itself melts and solidifies and closes the gap for blowing gas, and in the improved solid plug, the protrusion is made of metal to secure the gap between the dense refractory materials. I am making it, but because it easily gets wet with the bare metal, it causes a bullion gauge, and when it becomes bad, gas injection is not possible. Also, in manufacturing, the maximum gap between refractories is 2
Since only a layer can be taken and a sufficient amount of gas cannot be secured, the efficiency of stirring is very low.
【００１０】そのため、溶損速度が小さく、安定してガ
スを吹き込むことができて、攪拌力を増大させるため
に、ガス量の増量ができるガス吹き込みプラグが要望さ
れるものであった。Therefore, there has been a demand for a gas injection plug which has a small melting loss rate, can stably inject gas, and can increase the amount of gas in order to increase the stirring force.
【００１１】[0011]
【課題を解決するための手段】本発明は、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、取鍋
や転炉等の溶融金属容器内の溶融金属中へガスを吹き込
むガス吹き込みプラグにおいて、上記ガス吹き込み孔部
のガス吹き込み孔をガス吹き込み孔部の下部から上面に
わたって断面を渦巻き状として、その渦巻き状のガス吹
き込み孔の空隙を配設したことを特徴とする溶融金属容
器のガス吹き込みプラグおよびその製造方法を提供する
にある。SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and in order to solve the above problems, gas is introduced into molten metal in a molten metal container such as a ladle or a converter. In the gas blowing plug for blowing the gas, the cross section of the gas blowing hole of the gas blowing hole from the lower part of the gas blowing hole to the upper surface is spiral, and the gap of the spiral gas blowing hole is provided. A gas injection plug for a molten metal container and a method for manufacturing the same.
【００１２】[0012]
【作用】本発明のガス吹き込みプラグを溶融金属容器に
装着して攪拌用ガスを吹き込むと、ガス吹き込み孔部に
ガス吹き込み孔をガス吹き込み孔部の下部から上面にわ
たって断面を渦巻き状として、その渦巻き状のガス吹き
込み孔の空隙を０．２〜０．８mmとして配設したことに
よって、ガスは渦巻き状の０．２〜０．８mmの空隙のガ
ス吹き込み孔を通って溶融金属中に均一状に吹き込まれ
る。When the gas blowing plug of the present invention is attached to a molten metal container and a stirring gas is blown into the gas blowing hole, the gas blowing hole has a spiral cross section from the lower part of the gas blowing hole to the upper surface, and the swirling thereof is performed. By arranging the gaps of the gas injection holes in the shape of 0.2 to 0.8 mm, the gas is uniformly distributed in the molten metal through the gas injection holes of the spiral air gap of 0.2 to 0.8 mm. Is blown in.
【００１３】そして、ガス吹き込みプラグの表面が溶融
金属に絶えず接していても、ポ−ラスプラグのように溶
損が激しくなく、またガス吹き込み量が少なくなること
もなく、常に均一に安定して所要量の攪拌ガスを吹き込
むことができて、溶融金属を十分に攪拌することができ
る。Even if the surface of the gas blowing plug is constantly in contact with the molten metal, the melting loss is not as severe as with a porous plug, and the amount of gas blowing is not reduced, so that it is always required to be uniformly and stably. A certain amount of stirring gas can be blown in, and the molten metal can be sufficiently stirred.
【００１４】そして、上記ガス吹き込みプラグは、セラ
ミックグリ−ンシ−トとスペ−サ−材とを重ねて型枠に
巻き付けて断面が渦巻き状の多層の円柱体を成形し、上
記円柱体を焼成して緻密化した後に介挿したスペ−サ−
材を除去したガス吹き込みプラグのガス吹き込み孔部を
成形することによって、渦巻き状のガス吹き込み部を容
易に精度よく製造でき、ガス吹き込みプラグを大量に生
産することもできる。In the gas blowing plug, a ceramic green sheet and a spacer material are superposed and wound around a mold to form a multilayer cylindrical body having a spiral section, and the cylindrical body is fired. Spacer inserted after densification
By molding the gas blowing hole portion of the gas blowing plug from which the material has been removed, the spiral gas blowing portion can be easily and accurately manufactured, and the gas blowing plug can be mass-produced.
【００１５】[0015]
【実施例】以下、本発明を実施例にもとづいて説明す
る。図１〜図４は、本発明の一実施例を示すものであ
る。溶融金属容器のガス吹き込みプラグ１０は、図１、
図２のように上部にいくにしたがって断面が小さくなっ
た切頭台形状に構成していて、外周部に鉄製のメタルケ
−ス１１を被覆し、その内側にキャスタブル耐火物１２
を配設してガス吹き込み孔部１３を装着し、中心部にキ
ャスタブル耐火物等の中芯用の耐火物１４を装着してい
る。EXAMPLES The present invention will be described below based on examples. 1 to 4 show an embodiment of the present invention. The gas injection plug 10 of the molten metal container is shown in FIG.
As shown in FIG. 2, it has a truncated trapezoidal shape in which the cross section becomes smaller toward the top, and the outer circumference is covered with a metal case 11 made of iron, and the castable refractory 12 is provided inside thereof.
And a gas blow-in hole portion 13 are installed, and a refractory material 14 for a core, such as a castable refractory material, is attached to a central portion.
【００１６】上記ガス吹き込み孔部１３は、セラミック
シ−ト１５を図１、図２のように多層の渦巻き状に巻回
して形成していて、この渦巻き状のガス吹き込み孔１６
の空隙を０．２〜０．８mmとして所定量の攪拌ガスを流
通できるようにしており、メタルケ−ス１１の底面に接
続したガス導入管１７からの攪拌ガスを挿通して溶融金
属中に吹き込んで十分に攪拌できるようにしている。１
８はガス溜め部である。The gas injection hole portion 13 is formed by winding a ceramic sheet 15 in a multilayer spiral shape as shown in FIGS. 1 and 2, and the spiral gas injection hole 16 is formed.
A gap of 0.2 to 0.8 mm is made to allow a predetermined amount of stirring gas to flow, and the stirring gas from the gas introducing pipe 17 connected to the bottom surface of the metal case 11 is inserted and blown into the molten metal. So that it can be sufficiently stirred. 1
8 is a gas reservoir.
【００１７】上記した渦巻き状のガス吹き込み孔部１３
は、たとえば１〜１０mm厚さのＡｌ2 Ｏ3 の９４％、Ｍ
ｇＯ６％等のセラミックシ−ト１５と０．２〜０．８mm
厚さのアルミナファイバ−等のスペ−サ−材１９とを重
ねて、図３、図４のように所定径の円錐状の型枠２０に
巻き付けて、断面が渦巻き状の多層の円柱体２１として
いる。The above-mentioned spiral gas injection hole portion 13
Is, for example, 94% of Al 2 O 3 having a thickness of 1 to 10 mm, M
Ceramic sheet 15 such as gO6% and 0.2-0.8 mm
A spacer material 19 such as an alumina fiber having a thickness is overlapped and wound around a conical mold 20 having a predetermined diameter as shown in FIGS. 3 and 4, and a multilayer cylindrical body 21 having a spiral cross section. I am trying.
【００１８】その際、セラミックシ−ト１５、スペ−サ
−材１９の下端部は内側程短くして、上記したガス溜め
部１８を形成できるようにしている。そして、上記円柱
体２１を焼成した後に、介挿したスペ−サ−材１９を抜
き取って除去することによって得ることができる。At this time, the lower end portions of the ceramic sheet 15 and the spacer material 19 are shortened toward the inside so that the above-described gas reservoir 18 can be formed. Then, after the columnar body 21 is fired, the spacer material 19 that has been inserted is extracted and removed.
【００１９】次に、上記セラミックシ−ト１５は、セラ
ミックの製造で一般的なドクタ−ブレ−ド装置によるシ
−ト成形法や押出し成形法により、常温で可撓性のある
シ−ト材を精度よく製造することによって得られる。Next, the above-mentioned ceramic sheet 15 is a sheet material which is flexible at room temperature by a sheet molding method or an extrusion molding method using a doctor blade apparatus which is generally used for manufacturing ceramics. Can be obtained with high precision.
【００２０】バインダ−としては、ポリビニルアルコ−
ル（ＰＶＡ）、ポリビニルブチラ−ル（ＰＶＢ）、アク
リル樹脂、メチルセルロ−スなどの使用が可能であり、
これらと可塑剤とを組合わせて使用する。常温で可撓性
があり、バインダ−除去後も形状を保持するのにある程
度の強度を有し、焼結体の特性に悪影響が無い組み合わ
せであれば構わない。As the binder, polyvinyl alcohol
(PVA), polyvinyl butyral (PVB), acrylic resin, methyl cellulose, etc. can be used.
These are used in combination with a plasticizer. Any combination may be used as long as it is flexible at room temperature, has a certain level of strength to retain the shape after removing the binder, and does not adversely affect the characteristics of the sintered body.
【００２１】スペ−サ−材１９としては、上記したセラ
ミックファイバ−のようなものでもよいし、可撓性のあ
る紙、ゴム、プラスチック類など焼成中に焼失するもの
でもかまわない。しかし、層間に正確な厚みの０．２〜
０．８mmの空隙を確保するためには、セラミックファイ
バ−のような耐熱性で、不純物の発生しないものの方が
適している。The spacer material 19 may be a material such as the above-mentioned ceramic fiber, or may be a flexible paper, rubber, plastics or the like that is burnt out during firing. However, the exact thickness of 0.2 ~
In order to secure a 0.8 mm gap, it is more preferable to use a heat-resistant material such as a ceramic fiber that does not generate impurities.
【００２２】セラミックファイバ−の材質としては、ム
ライト質、アルミナ質があり、耐火物の焼結温度によっ
て選択すればよい。焼結温度が１４００℃以上であれば
アルミナ質が好ましい。その理由は、ムライト質ファイ
バ−を高温で使用すると、互いに融着して層間に間隙が
取れなくなるためである。設計した間隙が取れるよう
に、焼結収縮率を勘案して所定の厚さのセラミックファ
イバ−を使用する必要がある。Materials for the ceramic fiber include mullite and alumina, which may be selected depending on the sintering temperature of the refractory. Alumina is preferable if the sintering temperature is 1400 ° C. or higher. The reason is that when the mullite fiber is used at a high temperature, the mullite fibers are fused with each other and a gap cannot be formed between the layers. It is necessary to use a ceramic fiber having a predetermined thickness in consideration of the sintering shrinkage so that the designed gap can be taken.
【００２３】このようにして、渦巻き状の空隙を有する
円柱体２１の焼結体に図１、図２のように外側からメタ
ルケ−ス１１、キャスタブル耐火物１２を、そしてこの
焼結した円柱体２１の内側にキャスタブル耐火物等の耐
火物１４の中芯を内挿して、ガス吹き込みプラグ１０が
製造できる。ガス吹き込みプラグ１０を上部にいくにし
たがって断面が小さくなるようにするのは、使用中にガ
スの背圧でガス吹き込みプラグ１０が脱落するのを防止
するためである。In this way, the metal casing 11, the castable refractory 12 are provided from the outside as shown in FIGS. 1 and 2 on the sintered body of the cylindrical body 21 having the spiral void, and the sintered cylindrical body. A gas injection plug 10 can be manufactured by inserting a core of a refractory material 14 such as castable refractory material inside 21. The reason why the cross section of the gas blowing plug 10 becomes smaller as it goes upward is to prevent the gas blowing plug 10 from falling off due to the back pressure of the gas during use.
【００２４】ガス吹き込み孔の空隙が０．２mm未満で
は、十分なガスの流量が得られなく、逆に０．８mmより
大きいと溶融金属がさしこんでガス吹き込みが不能とな
るので好ましくない。If the gap of the gas blowing hole is less than 0.2 mm, a sufficient gas flow rate cannot be obtained, and conversely, if it is more than 0.8 mm, the molten metal is stuck and gas blowing becomes impossible, which is not preferable.
【００２５】ガス吹き込み孔を渦巻き状とするのは、製
造が容易であること、渦巻き量を３層以上の多層に長く
とれてガス量を多く確保できること、肉厚が薄くでき
て、耐熱スポ−ル性に優れること、さらに万一クラック
が入ったとしても、部分的な剥離ですみ、致命的な損傷
につながりにくいことなどによる。また、焼結収縮率デ
−タをもとに、ギャップの幅、ガス吹き込み孔を何層に
するかなど、所望の性能のガス吹き込みプラグの製造が
可能である。The gas-blowing hole having a spiral shape is easy to manufacture, has a large swirl amount of three or more layers, and can secure a large amount of gas. This is due to its excellent rubbing property, and even if a crack should occur, partial peeling is enough to prevent fatal damage. Further, based on the sintering shrinkage ratio data, it is possible to manufacture a gas injection plug having desired performance such as the width of the gap and the number of layers of the gas injection hole.
【００２６】セラミックシ−トの材質としては特に限定
しないが、耐火性と耐食性、耐熱スポ−ル性に優れたも
のであればかわまないが、Ａｌ2 Ｏ3 ９４％、ＭｇＯ６
％等を使用でき、中芯部およびガス吹き込みプラグの外
側とメタルケ−スの間の耐火物にはＡｌ2 Ｏ3 ９３％、
ＭｇＯ６％、ＣａＯ１％のアルミナ−スピネル質のキャ
スタブル耐火材等が好ましい。The material of the ceramic sheet is not particularly limited, but any material having excellent fire resistance, corrosion resistance, and heat resistant spooling property may be used. Al 2 O 3 94%, MgO 6
%, Etc., Al 2 O 3 93% for the refractory between the outside of the core and the gas blowing plug and the metal case,
Alumina-spinel castable refractory material having 6% of MgO and 1% of CaO is preferable.
【００２７】[0027]
【製造の使用例】上記した本発明の吹き込みプラグの製
造は、次のようにして行った。所定の成分になるように
セラミック粉末を秤量して、ポットミルで混合した。こ
の混合粉にメチルセルロ−ス、可塑剤、水を添加してニ
−ダ−で混練した後、押出し成形機で成形し、乾燥して
厚さ５mmのグリ−ンシ−トを得た。そして、このグリ−
ンシ−トに厚さ０．４mmのアルミナ質のセラミックファ
イバ−を積層し、型枠に巻き付けて成形体を得た。[Manufacturing Example] The above-mentioned blow-in plug of the present invention was manufactured as follows. The ceramic powder was weighed so as to have predetermined components and mixed by a pot mill. Methyl cellulose, a plasticizer, and water were added to this mixed powder, and the mixture was kneaded with a kneader, molded by an extrusion molding machine, and dried to obtain a green sheet having a thickness of 5 mm. And this green
A 0.4 mm-thick alumina ceramic fiber was laminated on the sheet and wound around a mold to obtain a molded body.
【００２８】この成形体を１６５０℃で焼成し、緻密な
焼結体を得た。この後、セラミックファイバ−の部分を
抜き取って除去し、渦巻き状の空隙を得た。空隙は、均
等な０．３mmの間隔であった。そして、メタルケ−スの
所定の位置に、外側からアルミナ−スピネル質のキャス
タブル耐火物、緻密質の渦巻き状のガス吹き込み孔部、
中芯のキャスタブル耐火物の順で内挿して、ガス吹き込
みプラグを製造した。This compact was fired at 1650 ° C. to obtain a dense sintered body. Thereafter, the ceramic fiber portion was extracted and removed to obtain a spiral void. The voids were evenly spaced 0.3 mm. Then, at a predetermined position of the metal case, from the outside, an alumina-spinel castable refractory, a dense spiral gas injection hole,
A gas blown plug was manufactured by inserting a castable refractory having a middle core in this order.
【００２９】このようにして製造したガス吹き込みプラ
グを、容量４５トンの電極加熱設備をもつＬＦ取鍋の底
部に配置し、ガス吹き込みを行った。また、従来の他の
方式のプラグも同様にして使用し、比較した。その結果
を表１に示す。The gas injection plug thus produced was placed at the bottom of an LF ladle equipped with an electrode heating facility having a capacity of 45 tons, and gas injection was performed. Also, other conventional plugs were similarly used and compared. The results are shown in Table 1.
【００３０】この結果から、明らかなように本発明のガ
ス吹き込みプラグの溶損量は従来のいずれのプラグより
も小さく、長寿命であった。また、ガスの出方も良好で
あり、途中で閉塞することはなかった。そして、使用中
は安定して、２００〜８００Ｎ１／分のガスの吹き込み
が可能であった。From these results, it is apparent that the gas blow plug of the present invention has a smaller amount of erosion loss than any of the conventional plugs and has a long life. In addition, the gas flow was good, and it was not clogged during the process. Then, during use, it was possible to stably inject a gas of 200 to 800 N1 / min.
【００３１】さらに、ガス吹き込み孔部の空隙の異なる
ものを試作して、テストを行った。表２にその結果を示
すが、０．２〜０．８mmが適していることが判った。Further, test pieces having different gas injection hole gaps were manufactured and tested. The results are shown in Table 2, and it was found that 0.2 to 0.8 mm is suitable.
【００３２】[0032]
【表１】 比 較 表 １ [Table 1] Comparison table 1
【００３３】[0033]
【表２】 比 較 表 ２ [Table 2] Comparison table 2
【００３４】[0034]
【発明の効果】以上のように本発明にあっては、ガス吹
き込みプラグの渦巻き状のガス吹き込み孔から安定して
攪拌に十分なガスを溶融金属容器内に均一状に吹き込む
ことができるとともに、溶損速度が小さくて耐久性を高
められ、精錬能率の向上がはかれ、低コスト化や品質の
安定に寄与することができる。As described above, according to the present invention, a gas sufficient for stirring can be stably and uniformly blown into the molten metal container from the spiral gas blowing hole of the gas blowing plug. The melting rate is low, durability is enhanced, refining efficiency is improved, and cost can be reduced and quality can be stabilized.
【００３５】また、上記ガス吹き込みプラグに渦巻き状
のガス吹き込み孔を設けるにもかかわらず、セラミック
シ−トとスペ−サ−材とを重ねて型枠に巻き付けて断面
が渦巻状の多層の円柱体を成形し、上記円柱体を焼成し
た後に介挿したスペ−サ−材を除去してガス吹き込み孔
部を成形するので、容易に製造できるとともに、ガス吹
き込み孔の空隙を正確に開孔することができて、十分な
ガス量を確保できるものである。Further, although the gas injection plug is provided with a spiral gas injection hole, the ceramic sheet and the spacer material are overlapped with each other and wound on the mold to form a multilayer cylinder having a spiral section. The body is molded, the spacer material inserted after firing the cylindrical body is removed, and the gas blowing hole is molded, so that the gas blowing hole can be easily manufactured, and the void of the gas blowing hole is accurately opened. It is possible to secure a sufficient amount of gas.
【００３６】また特に、セラミックシ−トとしてグリ−
ンシ−トを使用することによって、渦巻きを精度よく製
造でき、さらに常温で可撓性材を使用することで渦巻き
状の成形を容易に行うことができる。In particular, the ceramic sheet is green.
By using the sheet, the spiral can be manufactured with high accuracy, and by using the flexible material at room temperature, the spiral molding can be easily performed.
【００３７】また、渦巻きの径や渦巻きの長さを加減す
ることで、ガス吹き込み孔からのガス量を十分に増量す
ることができ、ガス攪拌効率を十分に高めることができ
るものである。Further, by adjusting the diameter of the spiral and the length of the spiral, the amount of gas from the gas blowing hole can be sufficiently increased, and the gas stirring efficiency can be sufficiently improved.
【図１】本発明の一実施例の平面図、FIG. 1 is a plan view of an embodiment of the present invention,
【図２】同上の側断面図、FIG. 2 is a side sectional view of the above,
【図３】同上のガス吹き込み孔部の製造例を示す平面
図、FIG. 3 is a plan view showing a manufacturing example of the gas blowing hole portion of the above.
【図４】同上の側断面図、FIG. 4 is a side sectional view of the same.
【図５】従来のガス吹き込み用のそれぞれのプラグの参
考図。FIG. 5 is a reference view of each conventional gas blowing plug.
１０…ガス吹き込みプラグ １１…メタルケ−
ス １２…キャスタブル耐火物 １３…ガス吹き込
み孔部 １４…耐火物 １５…セラミック
シ−ト １６…ガス吹き込み孔 １９…スペ−サ−
材 ２０…型枠 ２１…円柱体10 ... Gas injection plug 11 ... Metal cable
Space 12 ... Castable refractory 13 ... Gas blowing hole 14 ... Refractory 15 ... Ceramic sheet 16 ... Gas blowing hole 19 ... Spacer
Material 20 ... Formwork 21 ... Cylinder
Claims (6)
属中へガスを吹き込むガス吹き込みプラグにおいて、 上記ガス吹き込み孔部のガス吹き込み孔をガス吹き込み
孔部の下部から上面にわたって断面を渦巻き状として、
その渦巻き状のガス吹き込み孔の空隙を０．２〜０．８
mmとして配設したことを特徴とする溶融金属容器のガス
吹き込みプラグ。1. A gas injection plug for injecting gas into a molten metal in a molten metal container such as a ladle or a converter, wherein the gas injection hole of the gas injection hole has a cross section extending from a lower portion of the gas injection hole to an upper surface thereof. As a spiral,
The vortex-shaped gas blowing hole has a gap of 0.2 to 0.8.
A gas injection plug for a molten metal container, characterized in that it is arranged as mm.
ガス吹き込みプラグの外形にそって上方にいくにしたが
って断面が小さくなるように形成した請求項１に記載の
溶融金属容器のガス吹き込みプラグ。2. The gas injection plug for a molten metal container according to claim 1, wherein the spiral cross-sectional shape of the gas injection hole is formed such that the cross section becomes smaller as it goes upward along the outer shape of the gas injection plug.
ねて型枠に巻き付けて断面が渦巻き状の多層の円柱体を
成形し、 上記円柱体を焼成して緻密化した後に介挿したスペ−サ
−材を除去してガス吹き込みプラグのガス吹き込み孔部
を成形することを特徴とする溶融金属容器のガス吹き込
みプラグの製造方法。3. A ceramic sheet and a spacer material are overlapped and wound around a mold to form a multilayer cylindrical body having a spiral cross section, and the cylindrical body is baked and densified and then inserted. A method for manufacturing a gas injection plug of a molten metal container, characterized in that the spacer material is removed to form a gas injection hole portion of the gas injection plug.
を有するグリ−ンシ−トを使用する請求項３に記載の溶
融金属容器のガス吹き込みプラグの製造方法。4. The method for producing a gas blowing plug for a molten metal container according to claim 3, wherein a green sheet having flexibility at room temperature is used as the ceramic sheet.
吹き込み孔の空隙を０．２〜０．８mmの渦巻き状に成形
する請求項３または４に記載の溶融金属容器のガス吹き
込みプラグの製造方法。5. A gas blower for a molten metal container according to claim 3 or 4, wherein the spacer material has a predetermined thickness, and the gap of the gas blow hole is formed into a spiral shape of 0.2 to 0.8 mm. Manufacturing method of plug.
心部に中芯用の耐火物を、上記ガス吹き込み孔部の外側
とメタルケ−スとの間にキャスタブル耐火物を装填して
ガス吹き込みプラグを製造する請求項３ないし５のいず
れかに記載の溶融金属容器のガス吹き込みプラグの製造
方法。6. A gas refractory for a core is loaded in the center of the inside of the spiral gas blowing hole, and a castable refractory is loaded between the outside of the gas blowing hole and the metal case to blow the gas. The method for producing a gas-blown plug for a molten metal container according to claim 3, wherein the plug is produced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25151894A JPH0885817A (en) | 1994-09-19 | 1994-09-19 | Gas blowing plug for molten metal vessel and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25151894A JPH0885817A (en) | 1994-09-19 | 1994-09-19 | Gas blowing plug for molten metal vessel and its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0885817A true JPH0885817A (en) | 1996-04-02 |
Family
ID=17224011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25151894A Pending JPH0885817A (en) | 1994-09-19 | 1994-09-19 | Gas blowing plug for molten metal vessel and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0885817A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114277216A (en) * | 2021-12-27 | 2022-04-05 | 辽宁丰德耐磨新材料制品有限公司 | In-ladle argon blowing stirring method for production of wear-resistant steel balls |
| CN114367653A (en) * | 2022-01-07 | 2022-04-19 | 濮阳濮耐高温材料（集团）股份有限公司 | Fluid stirring purification element with scroll structure |
-
1994
- 1994-09-19 JP JP25151894A patent/JPH0885817A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114277216A (en) * | 2021-12-27 | 2022-04-05 | 辽宁丰德耐磨新材料制品有限公司 | In-ladle argon blowing stirring method for production of wear-resistant steel balls |
| CN114367653A (en) * | 2022-01-07 | 2022-04-19 | 濮阳濮耐高温材料（集团）股份有限公司 | Fluid stirring purification element with scroll structure |
| CN114367653B (en) * | 2022-01-07 | 2024-03-29 | 濮阳濮耐高温材料（集团）股份有限公司 | Fluid stirring purifying element with scroll structure |
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