JPH0751819A - Immersion nozzle for continuous casting - Google Patents
Immersion nozzle for continuous castingInfo
- Publication number
- JPH0751819A JPH0751819A JP5227841A JP22784193A JPH0751819A JP H0751819 A JPH0751819 A JP H0751819A JP 5227841 A JP5227841 A JP 5227841A JP 22784193 A JP22784193 A JP 22784193A JP H0751819 A JPH0751819 A JP H0751819A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- immersion nozzle
- continuous casting
- casting
- sio
- 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
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
(57)【要約】
【目的】 本発明は、ノズル閉塞を防止した上で、常に
安定して介在物欠陥のない加工用鋼板素材を鋳造できる
連続鋳造用浸漬ノズルを提供することを目的とするもの
である。
【構成】 鋼の連続鋳造用浸漬ノズルにおいて、溶鋼と
接触するノズル内壁全体又は付着が進行し易い部分を工
業的に不可避の成分を除いて、５〜５０ｗｔ％のＳｉＯ
2 ，５０〜９５ｗｔ％のＡｌ2Ｏ3を含み、且つＣ含有率
を５ｗｔ％以下とした組成の耐火物で構成したことを特
徴とする。
(57) [Abstract] [Object] An object of the present invention is to provide a continuous casting immersion nozzle capable of casting a steel plate material for processing, which is always stable and has no inclusion defects while preventing nozzle clogging. It is a thing. [Structure] In an immersion nozzle for continuous casting of steel, the entire inner wall of the nozzle that contacts molten steel or a portion where adhesion easily progresses is eliminated by removing 5 to 50 wt% of SiO.
It is characterized in that it is made of a refractory having a composition containing 2 , 50 to 95 wt% of Al 2 O 3 and having a C content of 5 wt% or less.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、鋼の連続鋳造におい
て、溶鋼をタンディッシュからモールド内へ鋳込むため
に使用される浸漬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 submerged nozzle used for casting molten steel from a tundish into a mold in continuous casting of steel.
【０００２】[0002]
【従来の技術】現在、連続鋳造においては、溶鋼を酸化
させることなくタンディッシュからモールド内に供給す
るために、浸漬ノズルが利用されている。浸漬ノズルの
材質としては、Ａｌ2Ｏ3及びＣを主体とし、これに２０
ｗｔ％程度のＳｉＯ2 を含有するものが主流となってい
る。このような浸漬ノズルでは、鋳造時間の経過ととも
に鋼中析出物のアルミナ及び地金がノズル内壁に付着
し、激しい場合にはノズル閉塞を引き起こし鋳造を停止
する場合もあった。2. Description of the Related Art At present, in continuous casting, an immersion nozzle is used to supply molten steel from a tundish into a mold without oxidizing it. As the material of the dipping nozzle, Al 2 O 3 and C are mainly used, and 20
Those containing about 2 wt% of SiO 2 are mainly used. In such a submerged nozzle, alumina and metal ingots deposited in steel adhere to the inner wall of the nozzle as the casting time elapses, and when violent, the nozzle may be clogged and the casting may be stopped.
【０００３】また、ノズル閉塞は鋳型内の溶鋼流動を乱
す原因にもなるため、パウダー巻き込みによる介在物欠
陥を増加させる。この問題を解決する手段として、例え
ば特開昭６４−４０１５４号公報に記載されているよう
に、ＺｒＯ2 −ＣａＯ−Ｃ質材料からなるノズルの使用
が試みられている。このＺｒＯ2 −ＣａＯ−Ｃ質材料を
ノズル内壁に用いることで、耐火物中ＣａＯと溶鋼中Ａ
ｌ2Ｏ3とを反応させカルシウムアルミネートの低融物を
生成させる。この低融物を溶鋼流により洗い流し、微少
な溶損を与えることにより付着を防止するものである。Further, since clogging of the nozzle also disturbs the flow of molten steel in the mold, inclusion defects due to powder entrainment increase. As a means for solving this problem, it has been attempted to use a nozzle made of a ZrO 2 —CaO—C-based material, as described in, for example, JP-A No. 64-40154. By using this ZrO 2 -CaO-C material for the inner wall of the nozzle, CaO in the refractory and A in the molten steel
React with l 2 O 3 to form a low melt of calcium aluminate. This low melt is washed away with a molten steel flow to give a slight melting loss to prevent the adhesion.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、ＺｒＯ
2 −ＣａＯ−Ｃ質材料のノズルにおいては、鋳造時間が
長いか、或は溶鋼清浄性が低下する場合には、ノズル内
壁に付着したアルミナを低融点化するのに十分なＣａＯ
を供給できなくなるため、ノズル閉塞が発生する。この
ため、ＺｒＯ2 −ＣａＯ−Ｃ質ノズルは確実な閉塞防止
対策になっていないのが現状である。さらに、ＺｒＯ2
−ＣａＯ−Ｃ質ノズルは一度ノズル内壁に付着堆積した
介在物を溶鋼流により洗い流すため、鋳型内に粗大な介
在物が流入し、鋳片品質を低下させるといった問題も生
じる。これらの問題点を鑑み、本発明は、ノズル閉塞を
防止した上で、常に安定して介在物欠陥のない加工用鋼
板素材を鋳造できる連続鋳造用浸漬ノズルを提供するこ
とを目的とするものである。However, ZrO
In the case of a nozzle made of a 2-CaO-C material, if the casting time is long or the molten steel cleanliness is deteriorated, sufficient CaO for lowering the melting point of alumina adhered to the inner wall of the nozzle is obtained.
Nozzle cannot be supplied, so that nozzle clogging occurs. For this reason, the ZrO 2 —CaO—C quality nozzle does not currently provide a reliable blocking prevention measure. Furthermore, ZrO 2
In the -CaO-C quality nozzle, since inclusions once attached and deposited on the inner wall of the nozzle are washed away by the molten steel flow, coarse inclusions flow into the mold, which causes a problem that the quality of the slab is deteriorated. In view of these problems, the present invention has an object to provide a continuous casting immersion nozzle capable of casting a stable steel plate material without inclusion defects while preventing nozzle clogging. is there.
【０００５】[0005]
【課題を解決するための手段】本発明は、鋼の連続鋳造
用浸漬ノズルにおいて、溶鋼と接触するノズル内壁全体
又は付着が進行し易い部分を工業的に不可避の成分を除
いて、５〜５０ｗｔ％のＳｉＯ2 、５０〜９５ｗｔ％の
Ａｌ2Ｏ3を含み、且つＣ含有率を５ｗｔ％以下にした組
成の耐火物で構成したことを特徴とする連続鋳造用浸漬
ノズルに関するものである。DISCLOSURE OF THE INVENTION According to the present invention, in an immersion nozzle for continuous casting of steel, the entire inner wall of the nozzle which is in contact with molten steel or a portion where adhesion easily proceeds, excluding industrially unavoidable components, is 5 to 50 wt. % SiO 2 , 50 to 95 wt% Al 2 O 3 , and a refractory having a composition with a C content of 5 wt% or less.
【０００６】[0006]
【作用】浸漬ノズルの付着防止技術を確立するために
は、まずノズル内壁へのアルミナ付着機構を明らかにす
る必要がある。本発明者らは、実機鋳造後の浸漬ノズル
調査から、浸漬ノズル耐火物と溶鋼との反応により生成
した反応アルミナ層を起点として、溶鋼中介在物の付着
堆積が進行することを知見した。さらに、浸漬ノズル耐
火物と溶鋼との反応機構についても基礎的な検討を行
い、付着の起点となる反応アルミナ層は以下に示す反応
過程を経て形成されることを見いだした。In order to establish the technique of preventing the adhesion of the immersion nozzle, it is first necessary to clarify the mechanism of alumina adhesion to the inner wall of the nozzle. The inventors of the present invention have found from the examination of the immersion nozzle after casting with an actual machine that the deposition of inclusions in the molten steel proceeds from the reaction alumina layer generated by the reaction between the immersion nozzle refractory and the molten steel. Furthermore, the reaction mechanism between the immersion nozzle refractory and the molten steel was also fundamentally studied, and it was found that the reaction alumina layer, which is the starting point of the adhesion, was formed through the following reaction process.
【０００７】まず、（１）式で示されるようにノズル耐
火物中のＳｉＯ2 がＣにより還元され、ＳｉＯガス、Ｃ
Ｏガスを生成する。 ＳｉＯ2（ｓ）＋Ｃ（ｓ）＝ＳｉＯ（ｇ）＋ＣＯ（ｇ） （１） これらガスはノズル耐火物内部を拡散し、ノズル／溶鋼
界面で（２）式、（３）式により溶鋼中のＡｌと反応す
る。 ３ＳｉＯ（ｇ）＋２Ａｌ＝Ａｌ2Ｏ3（ｓ）＋３Ｓｉ （２） ３ＣＯ（ｇ）＋２Ａｌ＝Ａｌ2Ｏ3（ｓ）＋３Ｃ （３） First, as shown by the formula (1), SiO 2 in the nozzle refractory is reduced by C, and SiO gas, C
Generates O gas. SiO 2 (s) + C (s) = SiO (g) + CO (g) (1) These gases diffuse inside the nozzle refractory, and at the nozzle / molten steel interface, the formula (2) and the formula (3) Reacts with Al. 3SiO (g) +2 Al = Al 2 O 3 (s) +3 Si (2) 3CO (g) +2 Al = Al 2 O 3 (s) +3 C (3)
【０００８】この時、ノズル／溶鋼界面に形成される酸
化膜が、反応アルミナ層である。この反応アルミナ層は
ノズルと溶鋼との反応により形成されるため、極めて活
性なアルミナで溶鋼中介在物の付着起点になり易い。以
上の結果から、介在物の付着を防止するためには、ノズ
ル内壁に反応アルミナ層を生成させないことが重要とな
る。At this time, the oxide film formed at the nozzle / molten steel interface is the reactive alumina layer. Since this reactive alumina layer is formed by the reaction between the nozzle and the molten steel, it is an extremely active alumina and easily serves as a starting point for the inclusion of inclusions in the molten steel. From the above results, it is important not to form the reactive alumina layer on the inner wall of the nozzle in order to prevent the inclusions from adhering.
【０００９】本発明者らは、前述した反応機構から反応
アルミナ層の生成を防止するためには、ノズル耐火物中
のＣを問題にならない程度まで低減することが有効であ
ると考えた。すなわち、ノズル耐火物中にＣが存在しな
ければ（１）式で示されるＳｉＯ2 のＣ還元反応は生じ
ない。このため、ノズル／溶鋼界面には（２）式、
（３）式の反応に基づく反応アルミナ層は生成せず、ア
ルミナ付着を防止することができる。The inventors of the present invention considered that it is effective to reduce C in the nozzle refractory to such an extent that it does not pose a problem in order to prevent the formation of the reaction alumina layer from the above reaction mechanism. That is, unless C is present in the nozzle refractory, the C 2 reduction reaction of SiO 2 represented by the formula (1) does not occur. Therefore, at the nozzle / molten steel interface, equation (2)
A reaction alumina layer based on the reaction of the formula (3) is not generated, and it is possible to prevent alumina adhesion.
【００１０】本発明において、内壁耐火物中にＣを含ま
ないことが好ましいが、必要な場合には５ｗｔ％以下に
限って添加しても良い。これは、Ｃ含有率が５ｗｔ％を
超えるとＳｉＯ2 のＣ還元反応速度が急激に速くなり、
アルミナ付着が進行するためである。また、低膨張性の
ＳｉＯ2 は耐スポーリング性の向上に優れており、５ｗ
ｔ％以上の添加によりＣレス化に伴う耐スポーリング性
の低下を補償できる。しかし、内壁耐火物中のＳｉＯ2
含有率が５０ｗｔ％を超えると反対に耐食性が低下す
る。このため、内壁耐火物中のＳｉＯ2 含有率は５〜５
０ｗｔ％の範囲にする必要がある。さらに、Ａｌ2Ｏ3は
耐食性を高める機能を有し、浸漬ノズルの材質としては
５０ｗｔ％以上含有する必要があり、反対にＡｌ2Ｏ3の
含有率が９５ｗｔ％を超えると、耐スポーリング性を低
下させる。よって、Ａｌ2Ｏ3の適正な含有率は５０〜９
５ｗｔ％である。In the present invention, it is preferable that the inner wall refractory does not contain C, but if necessary, it may be added in an amount of 5 wt% or less. This is because when the C content exceeds 5 wt%, the C reduction reaction rate of SiO 2 rapidly increases,
This is because the adhesion of alumina proceeds. Further, low expansion SiO 2 is excellent in improving spalling resistance, and is 5 w
Addition of t% or more can compensate for the decrease in spalling resistance associated with the reduction of C. However, SiO 2 in the refractory on the inner wall
On the contrary, when the content exceeds 50 wt%, the corrosion resistance is lowered. Therefore, the SiO 2 content in the inner wall refractory is 5 to 5
It must be in the range of 0 wt%. Further, Al 2 O 3 has a function of enhancing corrosion resistance, and it is necessary to contain 50 wt% or more as a material for the immersion nozzle. On the contrary, if the content of Al 2 O 3 exceeds 95 wt%, spalling resistance is high. Lower. Therefore, the proper content rate of Al 2 O 3 is 50 to 9
It is 5 wt%.
【００１１】浸漬ノズルの基本的な構成成分は以上であ
るが、この他にもノズル材質への添加物として既に知ら
れている材料を、本発明の効果を損なわない範囲で含有
させてもよい。例えば、強度を向上させるために金属Ｓ
ｉを、耐食性を向上させるためにＭｇＯ等を組み合せる
ことも可能である。また、本来の目的から考えて、ノズ
ル内壁全体を本発明の材質にする必要はなく、特に付着
が進行し易い部分に限って本材質を適用し、その他の部
分には従来材質を併用することも可能である。Although the basic constituent components of the immersion nozzle are as described above, other materials which are already known as additives to the nozzle material may be contained within the range not impairing the effects of the present invention. . For example, in order to improve strength, metal S
It is also possible to combine i with MgO or the like in order to improve the corrosion resistance. Further, from the original purpose, it is not necessary to use the material of the present invention for the entire inner wall of the nozzle, and this material should be applied only to the part where the adhesion easily progresses, and the conventional material should be used in combination with other parts. Is also possible.
【００１２】[0012]
【実施例】以下に、実施例及び比較例を挙げて、本発明
について説明する。表１に示した原料含有物に結合剤を
外掛けで１０ｗｔ％添加して混練し、アイソスタティッ
クプレスを用いて１．０ｔ／ｃｍ2 の圧力で図１に示す
ノズル形状に成形した。１は内壁、２はパウダーライン
部、３は吐出孔、４はノズル本体である。Ａ…ＺｒＯ2
−Ｃ材質、Ｂ…Ａｌ2Ｏ3−Ｃ−ＳｉＯ2材質（従来材
質）、Ｃ…Ａｌ2Ｏ3−ＳｉＯ2 材質（本発明材質）。な
お、パウダーライン部の耐火物はＺｒＯ2を７５ｗｔ
％、Ｃを２５ｗｔ％含有するＺｒＯ2−Ｃ質に統一し
た。EXAMPLES The present invention will be described below with reference to Examples and Comparative Examples. The raw material-containing material shown in Table 1 was externally added with 10 wt% of a binder and kneaded, and molded into a nozzle shape shown in FIG. 1 at a pressure of 1.0 t / cm 2 using an isostatic press. Reference numeral 1 is an inner wall, 2 is a powder line portion, 3 is a discharge hole, and 4 is a nozzle body. A ... ZrO 2
-C material, B ... Al 2 O 3 -C -SiO 2 material (conventional material), C ... Al 2 O 3 -SiO 2 material (the present invention material). The powder line refractory contains 75 wt% of ZrO 2 .
%, C 25 wt% ZrO 2 -C quality was unified.
【００１３】[0013]
【表１】 [Table 1]
【００１４】さらに、この成形体を１２００℃の温度で
還元焼成し、連続鋳造用浸漬ノズル（外径１８５ｍｍ
φ、内径９０ｍｍφ、吐出孔径７０ｍｍφ、吐出孔角度
３５度、内孔体厚み１５ｍｍの逆Ｙ型ノズル）を作製し
た。このようにして得られた浸漬ノズルを用いて、Ｔｉ
を０．０８ｗｔ％含有する炭素濃度３０ｐｐｍの極低炭
素鋼を４００分間鋳造した。本発明の実施例及び比較例
とも鋳造寸法は厚み２４５ｍｍ×幅１５００ｍｍで、８
５００ｍｍ長さに切断して１コイル単位とした。このス
ラブを常法により熱間圧延、冷間圧延し、最終的に厚み
０．７ｍｍ×幅１５００ｍｍコイルの冷延鋼板とした。
浸漬ノズル閉塞の評価に関しては、鋳造後の浸漬ノズル
回収後、吐出孔直上部の最大付着厚みを測定し、これを
鋳造時間で除すことにより付着速度を算出した。また、
鋳片品質については、冷間圧延後の検査ラインで目視観
察を行い、１コイル当たりに発生する介在物欠陥の個数
により評価した。Further, this molded body is subjected to reduction firing at a temperature of 1200 ° C., and a dipping nozzle for continuous casting (outer diameter 185 mm
φ, inner diameter 90 mmφ, discharge hole diameter 70 mmφ, discharge hole angle 35 °, inner hole thickness 15 mm). Using the immersion nozzle thus obtained, Ti
Ultra low carbon steel containing 0.08 wt% of carbon and having a carbon concentration of 30 ppm was cast for 400 minutes. In both the example and the comparative example of the present invention, the casting dimensions were 245 mm in thickness and 1500 mm in width, and
It was cut to a length of 500 mm to make one coil unit. The slab was hot-rolled and cold-rolled by a conventional method to finally obtain a cold-rolled steel sheet having a thickness of 0.7 mm and a width of 1500 mm.
Regarding the evaluation of the immersion nozzle clogging, after collecting the immersion nozzle after casting, the maximum adhesion thickness immediately above the discharge hole was measured, and this was divided by the casting time to calculate the adhesion speed. Also,
The slab quality was evaluated by visual observation on a test line after cold rolling and the number of inclusion defects generated per coil.
【００１５】表１に示す如く、実施例では少なくとも浸
漬ノズル内壁全体を、５〜５０ｗｔ％のＳｉＯ2 、５０
〜９５ｗｔ％のＡｌ2Ｏ3を含み、且つＣ含有率を５ｗｔ
％以下にした組成の耐火物で構成したことにより、常に
安定してノズル閉塞を防止できた。また、操業面のみな
らず、品質面でも介在物欠陥の発生がなく極めて良好な
鋳片を得ることができた。As shown in Table 1, in the embodiment, at least the entire inner wall of the immersion nozzle is covered with 5 to 50 wt% of SiO 2 and 50.
~ 95wt% Al 2 O 3 and C content 5wt
By using a refractory material having a composition of not more than%, it is possible to always stably prevent the nozzle clogging. Further, not only in terms of operation, but also in terms of quality, inclusion defects did not occur, and a very good cast piece could be obtained.
【００１６】これに対し、比較例１はＣの含有率が５ｗ
ｔ％を超えたため、ノズル閉塞防止の効果が十分得られ
ず、鋳造開始後３００分で鋳造を停止した。また、比較
例２はＳｉＯ2 含有率が５ｗｔ％未満で、且つＡｌ2Ｏ3
含有率が９５ｗｔ％を超えたため耐スポーリング性が低
下し、鋳造開始後１８０分で浸漬ノズルに亀裂が発生し
鋳造を停止した。さらに、比較例３はＳｉＯ2 含有率が
５０ｗｔ％を超え、且つＡｌ2Ｏ3含有率が５０ｗｔ％未
満であったため耐食性が低下し、浸漬ノズル溶損のため
鋳造開始後２３０分で鋳造を停止した。なお、実施例
は、図１の構造ノズルについて試験した結果であるが、
図２の構造ノズルについても同様の効果が得られた。On the other hand, in Comparative Example 1, the C content is 5 w.
Since it exceeded t%, the effect of preventing nozzle clogging was not sufficiently obtained, and the casting was stopped 300 minutes after the start of casting. In Comparative Example 2, the SiO 2 content is less than 5 wt% and Al 2 O 3
Since the content exceeded 95 wt%, the spalling resistance was reduced, and cracking occurred in the immersion nozzle 180 minutes after the start of casting, and casting was stopped. Further, in Comparative Example 3, since the SiO 2 content was over 50 wt% and the Al 2 O 3 content was less than 50 wt%, the corrosion resistance was lowered, and the casting was stopped 230 minutes after the start of casting due to melting damage of the immersion nozzle. did. The example is the result of testing the structure nozzle of FIG. 1.
Similar effects were obtained with the structure nozzle of FIG.
【００１７】[0017]
【発明の効果】以上に説明したように、本発明の連続鋳
造用浸漬ノズルによれば、ノズル閉塞を確実に防止で
き、さらに介在物欠陥も発生しないため、鋳片の品質は
非常に安定し、歩留りも格段に向上する。また、ノズル
閉塞に起因する種々の非定常作業がなくなるため、操業
面でも有効な浸漬ノズルを提供できる。As described above, according to the immersion nozzle for continuous casting of the present invention, nozzle clogging can be reliably prevented, and defects of inclusions do not occur, so that the quality of the slab is very stable. , The yield is also improved significantly. Further, since various unsteady operations due to nozzle clogging are eliminated, it is possible to provide an immersion nozzle that is effective in terms of operation.
【図１】本発明の浸漬ノズル各部の材質を説明するため
の図である。FIG. 1 is a diagram for explaining the material of each part of the immersion nozzle of the present invention.
【図２】本発明の他の浸漬ノズル各部の材質を説明する
ための図である。FIG. 2 is a diagram for explaining the material of each part of another immersion nozzle of the present invention.
１ 内壁 ２ パウダーライン部 ３ 吐出孔 ４ ノズル本体 Ａ ＺｒＯ2−Ｃ材質 Ｂ Ａｌ2Ｏ3−Ｃ−ＳｉＯ2材質（従来材質） Ｃ Ａｌ2Ｏ3−ＳｉＯ2材質（本発明材質）1 inner wall 2 powder line portion 3 discharge hole 4 nozzle body A ZrO 2 -C material B Al 2 O 3 -C-SiO 2 material (conventional material) C Al 2 O 3 -SiO 2 material (invention material)
Claims (1)
鋼と接触するノズル内壁全体又は付着が進行し易い部分
を工業的に不可避の成分を除いて、５〜５０ｗｔ％のＳ
ｉＯ2 、５０〜９５ｗｔ％のＡｌ2Ｏ3を含み、且つＣ含
有率を５ｗｔ％以下にした組成の耐火物で構成したこと
を特徴とする連続鋳造用浸漬ノズル。1. In an immersion nozzle for continuous casting of steel, 5 to 50 wt% of S is removed from the entire inner wall of the nozzle in contact with molten steel or a portion where adhesion easily progresses, excluding industrially unavoidable components.
An immersion nozzle for continuous casting, comprising a refractory material containing iO 2 and 50 to 95 wt% of Al 2 O 3 and having a C content rate of 5 wt% or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05227841A JP3124421B2 (en) | 1993-08-23 | 1993-08-23 | Immersion nozzle for continuous casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05227841A JP3124421B2 (en) | 1993-08-23 | 1993-08-23 | Immersion nozzle for continuous casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0751819A true JPH0751819A (en) | 1995-02-28 |
| JP3124421B2 JP3124421B2 (en) | 2001-01-15 |
Family
ID=16867213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05227841A Expired - Fee Related JP3124421B2 (en) | 1993-08-23 | 1993-08-23 | Immersion nozzle for continuous casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3124421B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998022243A1 (en) * | 1996-11-18 | 1998-05-28 | Shinagawa Refractories Co., Ltd. | Nozzle for the continuous casting of steel |
| JPH10314905A (en) * | 1997-05-19 | 1998-12-02 | Shinagawa Refract Co Ltd | Continuous casting nozzle for steel |
| JP2007326144A (en) * | 2006-06-09 | 2007-12-20 | Kurosaki Harima Corp | Immersion nozzle |
| JP2010253546A (en) * | 2009-04-24 | 2010-11-11 | Shinagawa Refractories Co Ltd | Immersion nozzle for continuous casting of steel |
| US8325475B2 (en) | 2009-11-25 | 2012-12-04 | Kabushiki Kaisha Toshiba | Electronic device |
-
1993
- 1993-08-23 JP JP05227841A patent/JP3124421B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998022243A1 (en) * | 1996-11-18 | 1998-05-28 | Shinagawa Refractories Co., Ltd. | Nozzle for the continuous casting of steel |
| US5979720A (en) * | 1996-11-18 | 1999-11-09 | Shinagawa Refractories Co., Ltd. | Nozzle for the continuous casting of steel |
| AU712600B2 (en) * | 1996-11-18 | 1999-11-11 | Shinagawa Refractories Co., Ltd. | Nozzle for use in continuous casting of steel |
| JPH10314905A (en) * | 1997-05-19 | 1998-12-02 | Shinagawa Refract Co Ltd | Continuous casting nozzle for steel |
| JP2007326144A (en) * | 2006-06-09 | 2007-12-20 | Kurosaki Harima Corp | Immersion nozzle |
| JP2010253546A (en) * | 2009-04-24 | 2010-11-11 | Shinagawa Refractories Co Ltd | Immersion nozzle for continuous casting of steel |
| US8325475B2 (en) | 2009-11-25 | 2012-12-04 | Kabushiki Kaisha Toshiba | Electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3124421B2 (en) | 2001-01-15 |
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