JPH09253836A - Gas seal method of nozzle joining part for casting, and casting nozzle used therefor - Google Patents
Gas seal method of nozzle joining part for casting, and casting nozzle used thereforInfo
- Publication number
- JPH09253836A JPH09253836A JP8995896A JP8995896A JPH09253836A JP H09253836 A JPH09253836 A JP H09253836A JP 8995896 A JP8995896 A JP 8995896A JP 8995896 A JP8995896 A JP 8995896A JP H09253836 A JPH09253836 A JP H09253836A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- gas
- casting
- supply pipe
- gas supply
- 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
- Continuous Casting (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、溶鋼容器に装着し
た鋳造用ノズルの接合部をガスシールする方法と、これ
に使用する鋳造用ノズルに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for gas-sealing a joint portion of a casting nozzle mounted on a molten steel container and a casting nozzle used for the method.
【０００２】[0002]
【従来の技術】鋼の連続鋳造における取鍋、タンデッシ
ュなどの溶鋼容器の底部には、溶鋼を注出する鋳造用ノ
ズルが装着されている。この鋳造ノズルの主な役割は、
溶鋼が大気と接触して変質するのを防止することにあ
る。鋳造用ノズルは使用中、溶鋼の流通で内部が減圧さ
れ、ノズル接合部から大気が侵入するという問題があ
る。接合部にはパッキングが介在されているが、溶鋼熱
でパッキングが多孔質化や亀裂を生じ、十分なシール効
果が得られていない。そこで、ノズルの接合部をＡｒな
どの不活性ガスでシールし、大気の侵入を防止すること
が知られている。例えば、実公平１−２００５１号、実
公平１−２３６５７号、実公平３−１５２４４号などに
見られるとおりである。2. Description of the Related Art A casting nozzle for pouring molten steel is attached to the bottom of a molten steel container such as a ladle and a tundish in continuous casting of steel. The main role of this casting nozzle is
The purpose is to prevent molten steel from contacting the atmosphere and deteriorating. The casting nozzle has a problem that during use, the internal pressure is reduced by the flow of molten steel, and the atmosphere enters from the nozzle joint. Although the packing is interposed at the joint, the packing is made porous and cracked by the heat of molten steel, and a sufficient sealing effect is not obtained. Therefore, it is known to seal the nozzle joint with an inert gas such as Ar to prevent the invasion of the atmosphere. For example, it is as seen in Jikkei 1-20051, Jikkoku 1-23657, Jikkoku 3-15244.
【０００３】[0003]
【発明が解決しようとする課題】上記従来の方法は、ノ
ズル上方に設けたガス孔あるいはポーラス耐火物から、
ノズルの内側に向けてガスを供給することで、ノズル接
続部をガスシールするものである。ここでは、ガス孔あ
るいはポーラス耐火物をノズルの周方向の全体にもうけ
ることで、ガスがノズルの周方向に均一に供給されるよ
うに配慮されているが、ガスが最短距離を通って流れる
という性質から、ガスの供給は実際にはガス供給管の接
続部側に集中する。SUMMARY OF THE INVENTION The above-mentioned conventional method uses the gas holes or porous refractories provided above the nozzle to
By supplying gas toward the inside of the nozzle, the nozzle connection portion is gas-sealed. Here, it is considered that gas is uniformly supplied in the circumferential direction of the nozzle by providing gas holes or porous refractory in the entire circumferential direction of the nozzle, but the gas flows through the shortest distance. Due to the nature, the gas supply is actually concentrated on the connection side of the gas supply pipe.
【０００４】ガスシールのために供給されたガスの殆ど
はノズル孔内に流入し、その際、溶鋼によるノズル孔の
損耗がガス流入によって促進される。前記したようにガ
スの供給がガス導入管を接続した側に集中するため、こ
れが原因でノズル孔のガス供給管の接続部側が先行して
損耗し、ノズル寿命の低下を招いていた。本発明は、鋳
造用ノズルとその上方に位置するノズルとの接合部を、
外周からのガス供給でガスシールする方法において、ガ
ス流入によるノズル孔の局部的な先行損耗を防止して、
ノズル寿命の向上を図ることを目的とする。Most of the gas supplied for the gas seal flows into the nozzle hole, and the wear of the nozzle hole due to the molten steel is accelerated by the gas flow. As described above, the supply of gas concentrates on the side where the gas introduction pipe is connected, and this causes the wear of the nozzle hole ahead of the connection part of the gas supply pipe, leading to a reduction in the nozzle life. The present invention, the joint between the casting nozzle and the nozzle located above it,
In the method of gas sealing with gas supply from the outer circumference, local preceding wear of the nozzle hole due to gas inflow is prevented,
The purpose is to improve the life of the nozzle.
【０００５】[0005]
【課題を解決するための手段】ガスシールを行う以上、
ノズル孔内へのガスの流入は避けられない。本発明者ら
は、ノズル孔へのガスの流入がノズルの周方向に均等で
あれば、局部的な先行損耗を防止することができるとい
う考えから、まず、ノズルの周方向にわたって複数本の
ガス供給管を接続することを試みた。しかし、この場合
もガス供給源から最短距離にあるガス供給管からのガス
供給が優先し、この最短距離にあるガス供給管からのガ
ス圧で他のガス供給管からのガス供給が抑えられ、結局
は問題の解決にならなかった。[Means for Solving the Problems] Since the gas sealing is performed,
Inflow of gas into the nozzle hole is unavoidable. The inventors of the present invention consider that if the flow of gas into the nozzle hole is uniform in the circumferential direction of the nozzle, local preceding wear can be prevented. Attempted to connect the supply pipe. However, in this case as well, the gas supply from the gas supply pipe located at the shortest distance from the gas supply source is given priority, and the gas pressure from the gas supply pipe located at this shortest distance suppresses the gas supply from other gas supply pipes. After all, it did not solve the problem.
【０００６】そこでさらに研究を重ねた結果、ガス供給
管の接続個所をノズルの周方向に変化させると、ノズル
孔の損耗が分散し、局部的な先行損耗を確実に防止でき
ることをしり、本発明を導き出すに至ったものである。
その構成は、以下のとおりである。As a result of further research, it was found that if the connection point of the gas supply pipe was changed in the circumferential direction of the nozzle, the wear of the nozzle hole was dispersed, and local preceding wear could be surely prevented. Has led to the derivation of.
The configuration is as follows.
【０００７】１．鋳造用ノズルとその上方に位置するノ
ズルとの接合部を、外周からのガス供給でガスシールす
る方法において、鋳造用ノズルを一定時間経過後、ガス
供給管の接続個所をノズルの周方向に変化させることを
特徴とした鋳造用ノズル接続部のガスシール方法。[0007] 1. In the method of sealing the joint between the casting nozzle and the nozzle located above it by gas supply from the outer periphery, after changing the casting nozzle for a certain period of time, the connection point of the gas supply pipe changes in the circumferential direction of the nozzle. A gas sealing method for a casting nozzle connecting portion, characterized by:
【０００８】２．鋳造用ノズルを縦軸にそって回転し、
ガス供給管の接続個所をノズルの周方向に変化させる請
求項１記載の方法。2. Rotate the casting nozzle along the vertical axis,
The method according to claim 1, wherein the connection point of the gas supply pipe is changed in the circumferential direction of the nozzle.
【０００９】３．鋳造用ノズルの上方の外周および上端
面を鉄皮で覆い、ノズルと鉄皮との間にガス通路となる
空隙を設け、ノズル外周の鉄皮にガス供給管を接続し、
このガス供給管から前記の空隙を通してノズル上端の内
側に向けてガスを供給するようにした鋳造用ノズルにお
いて、前記のガス供給管を接続するガス導入孔を鋳造用
ノズルの周方向に複数設けた鋳造用ノズル。3. The upper outer circumference and the upper end surface of the casting nozzle are covered with a steel shell, a gap serving as a gas passage is provided between the nozzle and the steel shell, and a gas supply pipe is connected to the steel shell on the outer circumference of the nozzle,
In the casting nozzle adapted to supply gas from the gas supply pipe to the inside of the upper end of the nozzle through the gap, a plurality of gas introduction holes for connecting the gas supply pipe are provided in the circumferential direction of the casting nozzle. Casting nozzle.
【００１０】４．鋳造用ノズルの上方をガス透過性のポ
ーラス耐火物にすると共に、このポーラス耐火物の外周
および上端を鉄皮で覆い、ノズル外周の鉄皮にガス供給
管を接続し、このガス供給管から前記のポーラス耐火物
にガスを供給させるようにした鋳造用ノズルにおいて、
前記のガス供給管を接続するガス導入孔をノズルの周方
向に複数設けた鋳造用ノズル。4. While making the upper part of the casting nozzle a gas-permeable porous refractory, the outer periphery and the upper end of this porous refractory are covered with a steel shell, and a gas supply pipe is connected to the iron shell of the outer periphery of the nozzle. In the casting nozzle designed to supply gas to the porous refractory of
A casting nozzle in which a plurality of gas introduction holes for connecting the gas supply pipe are provided in the circumferential direction of the nozzle.
【００１１】[0011]
【発明の実施の形態】本発明方法を図面を用いて説明す
る。図１の縦断面図は、本発明方法に使用する鋳造用ノ
ズル（１）の一例である。上端は上方のノズル（２）を
受けるために内孔が拡げられている。図では、上方のノ
ズル（２）を受ける部分を段差にしているが、テーパー
状にしてもよい。上方のノズル（２）は、一般にスライ
ディングノズル（図示せず）の下方に接続し、下ノズル
あるいは中間ノズルと称される。また、コレクターノズ
ルと称されこともある。DESCRIPTION OF THE PREFERRED EMBODIMENTS The method of the present invention will be described with reference to the drawings. The longitudinal sectional view of FIG. 1 is an example of a casting nozzle (1) used in the method of the present invention. The upper end is widened to receive the upper nozzle (2). In the figure, the portion for receiving the upper nozzle (2) is stepped, but it may be tapered. The upper nozzle (2) is generally connected below a sliding nozzle (not shown) and is referred to as the lower nozzle or intermediate nozzle. It may also be called a collector nozzle.
【００１２】鋳造用ノズル（１）の上方の外周および上
端面は、鉄皮（３）で覆う。ノズル（１）の上方側面に
は、周方向にエアポケット（４）としての空隙を設け
る。ノズル（１）の上端には前記のエアポケット（４）
と連通したガス通路（５）を設ける。このガス通路
（５）は、例えばノズル（１）上端面の全体と鉄皮
（３）との間に均等幅の空隙としてもよいし、また、ノ
ズル上端面にノズル（１）の中心軸線から放射状に設け
た凹溝でもよい。エアポケット（４）あるいはガス通路
（５）以外の部分は、鉄皮（３）の固定とガス漏れ防止
のために、鉄皮（３）とノズル（１）外周との間にモル
タル等を介在させる。鉄皮（３）に穿ったガス導入孔
（６ａ）にガス供給管（７）を接続する。The outer periphery and the upper end surface above the casting nozzle (1) are covered with a steel shell (3). On the upper side surface of the nozzle (1), a space as an air pocket (4) is provided in the circumferential direction. At the upper end of the nozzle (1) is the air pocket (4).
A gas passage (5) communicating with is provided. The gas passage (5) may be, for example, a space having a uniform width between the entire upper end surface of the nozzle (1) and the iron shell (3), or the upper end surface of the nozzle from the central axis of the nozzle (1). It may be a groove provided radially. In portions other than the air pocket (4) or the gas passage (5), mortar or the like is interposed between the iron shell (3) and the outer circumference of the nozzle (1) in order to fix the iron shell (3) and prevent gas leakage. Let The gas supply pipe (7) is connected to the gas introduction hole (6a) formed in the iron shell (3).
【００１３】図２の鋳造用ノズルは、ノズルの上端部の
全体をガス透過性のポーラス耐火物（８）で構成したも
のである。ノズル（１）の上方の外周および上端面は、
鉄皮（３）で覆う。ポーラス耐火物（８）の側面には、
周方向にエアポケット（４）としての空隙を設ける。エ
アポケット（４）以外の部分は、鉄皮（３）の固定とガ
ス漏れ防止のために、鉄皮（３）とノズル（１）外周と
の間にモルタル等を介在させる。鉄皮（３）に穿ったガ
ス導入孔（６ａ）にガス供給管（７）を接続する。In the casting nozzle shown in FIG. 2, the entire upper end portion of the nozzle is made of a gas-permeable porous refractory (8). The outer circumference and upper end surface above the nozzle (1) are
Cover with iron crust (3). On the side of the porous refractory (8),
A space as an air pocket (4) is provided in the circumferential direction. In portions other than the air pockets (4), mortar or the like is interposed between the iron shell (3) and the outer circumference of the nozzle (1) in order to fix the iron shell (3) and prevent gas leakage. The gas supply pipe (7) is connected to the gas introduction hole (6a) formed in the iron shell (3).
【００１４】図１，図２において、ガス供給管（７）供
給されたＡｒなどの不活性ガスは、ガス導入孔（６ａ）
から一旦、エアポケット（４）に入った後、図１ではガ
ス通路（５）、図２ではポーラス耐火物（８）の組織内
の空隙を経て、ノズル接続部に向けて噴出し、ガスシー
ルによってノズル接続部からの大気の侵入を防止する。
以上は構造、使用方法ともに従来の鋳造用ノズルと同じ
である。これに対し本発明は、さらにガス導入孔（６
ａ），（６ｂ）をノズルの周方向に複数設けることで、
ノズルを一定時間経過後、ガス供給管（７）の接続個所
をノズルの周方向に変化させる。In FIG. 1 and FIG. 2, the inert gas such as Ar supplied in the gas supply pipe (7) is introduced into the gas introduction hole (6a).
Once in the air pocket (4), the gas is passed through the gas passageway (5) in FIG. 1 and the porous refractory (8) in FIG. Prevents the invasion of the atmosphere from the nozzle connection part.
The above is the same in structure and usage as the conventional casting nozzle. On the other hand, the present invention further includes a gas introduction hole (6
By providing a) and (6b) in the circumferential direction of the nozzle,
After a certain period of time has passed through the nozzle, the connection point of the gas supply pipe (7) is changed in the circumferential direction of the nozzle.
【００１５】本発明の方法を、図３と、この図３のＡの
Ｘ−Ｘ線断面図である図４に基づいて説明すると、ま
ず、Ａのように複数設けたガス導入孔（６ａ），（６
ｂ）のうち、一方にガス供給管（７）を接続し、もう一
方は閉栓して使用する。The method of the present invention will be described with reference to FIG. 3 and FIG. 4 which is a sectional view taken along line XX of FIG. 3A. First, a plurality of gas introduction holes (6a) like A are provided. , (6
One of b) is connected to the gas supply pipe (7), and the other is closed and used.
【００１６】ノズル孔内の損耗は、ガスの流入が集中す
るガス供給管（７）を接続した側が先行する。そこで本
発明ではノズルを一定時間使用後、ガス供給管（７）の
接続個所をノズルの周方向に変化させる。このガス供給
管（７）の接続位置の変化でノズル孔の先行損耗がノズ
ルの周方向に分散し、ノズル孔の各部位での損耗速度が
バランス化し、ノズル全体としての寿命が向上する。The wear in the nozzle hole is preceded by the side to which the gas supply pipe (7) where the inflow of gas is concentrated is connected. Therefore, in the present invention, after using the nozzle for a certain period of time, the connection point of the gas supply pipe (7) is changed in the circumferential direction of the nozzle. This change in the connection position of the gas supply pipe (7) disperses the preceding wear of the nozzle hole in the circumferential direction of the nozzle, balances the wear speed at each part of the nozzle hole, and improves the life of the entire nozzle.
【００１７】ノズルを固定し、ガス供給管（７）の接続
位置を変化させてもよいが、ガス供給管（７）の位置は
変えず、図４のようにノズル（１）を縦軸にそって回転
させて行ってもよい。ノズル（１）側を回転させると、
ガス供給管（７）の長さを最小限に留めることができ、
装置全体がコンパクトなものになる。Although the nozzle may be fixed and the connection position of the gas supply pipe (7) may be changed, the position of the gas supply pipe (7) is not changed, and the nozzle (1) is plotted on the vertical axis as shown in FIG. You may rotate it and go. When the nozzle (1) side is rotated,
The length of the gas supply pipe (7) can be kept to a minimum,
The entire device becomes compact.
【００１８】また、図１〜４では、ガス供給管（７）を
接続するガス導入孔（６ａ），（６ｂ）をノズルの周方
向に２個所設けたが、これに限らず、３個所以上にして
もよい。しかし、ガス導入孔を多数設けると構造が複雑
になるので、４個所までが好ましい。Further, in FIGS. 1 to 4, the gas introduction holes (6a) and (6b) for connecting the gas supply pipe (7) are provided at two locations in the circumferential direction of the nozzle, but the number is not limited to this and three or more locations. You may However, since the structure becomes complicated when a large number of gas introduction holes are provided, it is preferable to provide up to four gas introduction holes.
【００１９】[0019]
【実施例】ガス導入管をノズルの周方向に２個所設けた
図１、図２に示した構造の鋳造ノズルを２５０ｔ溶鋼取
鍋に装着し、Ａｒガスの供給によるガスシールの実機テ
ストした。ガス供給管の接続を終始一方向にした従来方
法では、ノズル孔の局部損耗が原因で１１〜１３チャー
ジの使用で寿命が尽きた。これに対し、本発明によれ
ば、ガス供給管の接続個所の変化でノズル孔の損耗が周
方向に分散し、１８〜２０チャージのノズル寿命を得
た。EXAMPLE A casting nozzle having the structure shown in FIGS. 1 and 2 in which two gas introduction pipes were provided in the circumferential direction of the nozzle was attached to a 250t molten steel ladle, and a gas seal actual test was performed by supplying Ar gas. In the conventional method in which the connection of the gas supply pipe is made unidirectional all the time, the service life is exhausted by using 11 to 13 charges due to local wear of the nozzle holes. On the other hand, according to the present invention, the wear of the nozzle hole is dispersed in the circumferential direction due to the change of the connection portion of the gas supply pipe, and the nozzle life of 18 to 20 charges was obtained.
【００２０】[0020]
【発明の効果】本発明によれば、ガス流入によるノズル
孔の損耗を分散することで、ノズル寿命が確実に向上す
る。その結果、ノズル取替え工数の低減、それに伴う鋼
鋳造設備の稼働率の向上など、顕著な効果を得ることが
できる。According to the present invention, the wear of the nozzle holes due to the gas inflow is dispersed, so that the life of the nozzle is surely improved. As a result, it is possible to obtain remarkable effects such as a reduction in the number of man-hours required for nozzle replacement and an accompanying increase in the operating rate of the steel casting equipment.
【図１】本発明方法に使用する鋳造用ノズルの一例であ
る。FIG. 1 is an example of a casting nozzle used in the method of the present invention.
【図２】本発明方法に使用する鋳造用ノズルの他の一例
である。FIG. 2 is another example of the casting nozzle used in the method of the present invention.
【図３】（Ａ）：本発明方法の説明図である。 （Ｂ）：本発明方法の説明図である。FIG. 3A is an explanatory diagram of the method of the present invention. (B): An explanatory view of the method of the present invention.
【図４】図３の（Ｂ）において、Ｘ−Ｘ線断面図であ
る。FIG. 4 is a sectional view taken along line XX in FIG.
１ 鋳造用ノズル ２ 上方のノズル ３ 鉄皮 ４ エアポケット ５ ガス通路 ６ａ ガス導入孔 ６ｂ ガス導入孔 ７ ガス供給管 ８ ポーラス耐火物 1 Casting Nozzle 2 Upper Nozzle 3 Iron Skin 4 Air Pocket 5 Gas Passage 6a Gas Introduction Hole 6b Gas Introduction Hole 7 Gas Supply Pipe 8 Porous Refractory
───────────────────────────────────────────────────── フロントページの続き (72)発明者 西岡 修 兵庫県姫路市広畑区富士町１番地 新日本 製鐵株式会社広畑製鐵所内 (72)発明者 大森 敏隆 兵庫県高砂市荒井町新浜１−３−１ ハリ マセラミック株式会社内 (72)発明者 仲村 誠 兵庫県高砂市荒井町新浜１−３−１ ハリ マセラミック株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Osamu Nishioka 1 Fuji-machi, Hirohata-ku, Himeji-shi, Hyogo Nippon Steel Corporation Hirohata Works (72) Inventor Toshitaka Omori 1-3, Niihama, Arai-cho, Takasago-shi, Hyogo -1 Inside Harima Ceramic Co., Ltd. (72) Inventor Makoto Nakamura 1-3-1 Niihama, Arai-cho, Takasago-shi, Hyogo Inside Harima Ceramic Co., Ltd.
Claims (4)
ルとの接合部を、外周からのガス供給でガスシールする
方法において、鋳造用ノズルを一定時間経過後、ガス供
給管の接続個所をノズルの周方向に変化させることを特
徴とした鋳造用ノズル接続部のガスシール方法。1. A method of gas-sealing a joint between a casting nozzle and a nozzle located above the nozzle by supplying gas from the outer periphery, wherein the casting nozzle is connected with a gas supply pipe after a certain period of time. A gas sealing method for a casting nozzle connecting portion, characterized in that the method is changed in the circumferential direction.
ス供給管の接続個所をノズルの周方向に変化させる請求
項１記載の方法。2. The method according to claim 1, wherein the casting nozzle is rotated along the longitudinal axis to change the connection point of the gas supply pipe in the circumferential direction of the nozzle.
を鉄皮で覆い、ノズルと鉄皮との間にガス通路となる空
隙を設け、ノズル外周の鉄皮にガス供給管を接続し、こ
のガス供給管から前記の空隙を通してノズル上端の内側
に向けてガスを供給するようにした鋳造用ノズルにおい
て、前記のガス供給管を接続するガス導入孔を鋳造用ノ
ズルの周方向に複数設けた鋳造用ノズル。3. A casting nozzle is covered with an outer circumference and an upper end surface above with a steel shell, a gap serving as a gas passage is provided between the nozzle and the steel shell, and a gas supply pipe is connected to the steel shell on the outer circumference of the nozzle. In the casting nozzle adapted to supply gas from the gas supply pipe to the inside of the upper end of the nozzle through the gap, a plurality of gas introduction holes for connecting the gas supply pipe are provided in the circumferential direction of the casting nozzle. Casting nozzle.
ラス耐火物にすると共に、このポーラス耐火物の外周お
よび上端を鉄皮で覆い、ノズル外周の鉄皮にガス供給管
を接続し、このガス供給管から前記のポーラス耐火物に
ガスを供給させるようにした鋳造用ノズルにおいて、前
記のガス供給管を接続するガス導入孔をノズルの周方向
に複数設けた鋳造用ノズル。4. A gas-permeable porous refractory is provided above the casting nozzle, the outer periphery and the upper end of the porous refractory are covered with a steel shell, and a gas supply pipe is connected to the steel shell on the outer periphery of the nozzle. A casting nozzle in which gas is supplied from the gas supply pipe to the porous refractory material, wherein a plurality of gas introduction holes for connecting the gas supply pipe are provided in the circumferential direction of the nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08995896A JP3564225B2 (en) | 1996-03-21 | 1996-03-21 | Gas sealing method for casting nozzle joint and casting nozzle used therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08995896A JP3564225B2 (en) | 1996-03-21 | 1996-03-21 | Gas sealing method for casting nozzle joint and casting nozzle used therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09253836A true JPH09253836A (en) | 1997-09-30 |
| JP3564225B2 JP3564225B2 (en) | 2004-09-08 |
Family
ID=13985206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08995896A Expired - Lifetime JP3564225B2 (en) | 1996-03-21 | 1996-03-21 | Gas sealing method for casting nozzle joint and casting nozzle used therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3564225B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100768300B1 (en) * | 2001-07-16 | 2007-10-17 | 주식회사 포스코 | Timingladle sliding nozzle cassette melting loss preventing apparatus |
| JP2011212721A (en) * | 2010-03-31 | 2011-10-27 | Kurosaki Harima Corp | Long nozzle |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012166256A (en) * | 2011-02-16 | 2012-09-06 | Kurosaki Harima Corp | Lower nozzle joint structure, gas seal method in the same, gas seal system, and abnormality detecting system |
-
1996
- 1996-03-21 JP JP08995896A patent/JP3564225B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100768300B1 (en) * | 2001-07-16 | 2007-10-17 | 주식회사 포스코 | Timingladle sliding nozzle cassette melting loss preventing apparatus |
| JP2011212721A (en) * | 2010-03-31 | 2011-10-27 | Kurosaki Harima Corp | Long nozzle |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3564225B2 (en) | 2004-09-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4480770A (en) | Method and apparatus for the protection of molten metal flows in furnaces | |
| US4421257A (en) | Metal pouring nozzle with gas inlet | |
| JPH09253836A (en) | Gas seal method of nozzle joining part for casting, and casting nozzle used therefor | |
| US4815715A (en) | Gas purging assembly for supplying gas to molten metal in a metallurgical vessel | |
| JPH1163846A (en) | Cooling plate for vertical furnace | |
| US5743323A (en) | Apparatus for continuous casting | |
| US4619444A (en) | Arrangement for preventing air from reaching abutting sliding surfaces of rotary sliding closure unit | |
| GB2313076A (en) | Long nozzle with gas passages for continuous casting | |
| FR2427865A1 (en) | TUNDISH FOR CONTINUOUS CASTING OF STEEL | |
| US4261554A (en) | Tap-hole closing arrangement of a metallurgical vessel | |
| GB1521194A (en) | Apparatus for flushing steel with gas | |
| JPH04270037A (en) | Nozzle for continuous casting | |
| JPH0744364Y2 (en) | Upper nozzle for gas blowing used in molten metal discharge device | |
| US3582057A (en) | Oxygen lance | |
| JPS61206559A (en) | Gas sealing method for molten steel flow | |
| JPS6340297Y2 (en) | ||
| JPH0435003Y2 (en) | ||
| JP2000061595A (en) | Refractory formed body for blowing gas | |
| CN214720528U (en) | Long-life directional water feeding port of tundish | |
| JPH09296205A (en) | Cooling plate for furnace wall in blast furnace | |
| JPH01104462A (en) | Ladle used for casting metal | |
| JPS5364604A (en) | Tap hole for molten steel equipped with cooling device | |
| JPS6167711A (en) | Equipment for blowing gas and scouring agent | |
| JPS5934878Y2 (en) | Lance nozzle for refractory wall repair | |
| JPS6145149Y2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20040323 |
|
| R155 | Notification before disposition of declining of application |
Free format text: JAPANESE INTERMEDIATE CODE: R155 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20040607 |
|
| R150 | Certificate of patent (=grant) or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080611 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090611 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090611 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100611 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100611 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110611 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110611 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120611 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120611 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130611 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130611 Year of fee payment: 9 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130611 Year of fee payment: 9 |
|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130611 Year of fee payment: 9 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140611 Year of fee payment: 10 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |