JPS59225862A - Immersion nozzle for continuous casting device - Google Patents
Immersion nozzle for continuous casting deviceInfo
- Publication number
- JPS59225862A JPS59225862A JP10193983A JP10193983A JPS59225862A JP S59225862 A JPS59225862 A JP S59225862A JP 10193983 A JP10193983 A JP 10193983A JP 10193983 A JP10193983 A JP 10193983A JP S59225862 A JPS59225862 A JP S59225862A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- immersion nozzle
- brick
- immersion
- fitted
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/58—Pouring-nozzles with gas injecting means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/502—Connection arrangements; Sealing means therefor
Abstract
Description
【発明の詳細な説明】 本発明は連続鋳造用浸漬ノズルに関する。[Detailed description of the invention] The present invention relates to a submerged nozzle for continuous casting.
鋼の連続鋳造は溶鋼をメンディツシュから浸漬ノズＡ・
を介してモールドへ注入し、該モールドで溶鋼を急冷し
て凝固した鋼を連続的に引き抜き、所定寸法に切断して
鋼片を製造するものである。Continuous casting of steel involves passing the molten steel through the immersion nozzle A.
The molten steel is injected into a mold through the mold, the molten steel is rapidly cooled in the mold, and the solidified steel is continuously drawn out and cut into predetermined dimensions to produce steel slabs.
近年、連続鋳造用浸漬ノズルとしては、タンディツシュ
あるいは取鍋の１部に装着されたノズルに嵌合してホル
ダ等によシ保持できるようにし、浸漬ノズルの交換作業
の時間短縮を図った外挿式のものが用いられるようにな
ってきている。In recent years, immersion nozzles for continuous casting have been designed to fit into a nozzle attached to a part of a tundish or ladle and be held in a holder, etc., thereby reducing the time required to replace the immersion nozzle. Formulas have come to be used.
ところで、特に上述したような外挿式の浸漬ノズルにお
いては、何ら対策を講じなければ、使用中の熱によるホ
ルダ等の変形あるいは浸漬ノズルを構成する成分の一つ
である黒鉛が酸化されることに起因して、タンディツシ
ュあるいは取鍋の下部に装着されたノズルと浸漬ノズル
との嵌合面から空気が吸い込まれ易くなり、鋼中の窒素
濃度が高くなって鋼の品質を低下させるばかりでなく、
酸素の影響により浸漬ノズル内部が溶損したシ、アルミ
キルド鋼の場合には鋼中のアルミニウムが酸化されたり
して長時間の鋳造が不可能である。By the way, especially with the above-mentioned extrapolation type immersion nozzle, if no measures are taken, the holder etc. may be deformed due to heat during use, or graphite, which is one of the components constituting the immersion nozzle, may be oxidized. Due to this, air is easily sucked in from the fitting surface between the nozzle installed at the bottom of the tundish or ladle and the immersion nozzle, which not only increases the nitrogen concentration in the steel and deteriorates the quality of the steel. ,
The inside of the immersion nozzle is melted due to the influence of oxygen, and in the case of aluminum killed steel, the aluminum in the steel is oxidized, making long-term casting impossible.
従来、上述した空気の吸い込みを防止するためにはＡｒ
などの不活性ガスをタンディツシュあるいは取鍋の下部
に装着されたノズルと浸漬ノズルとの嵌合部に直接吹き
付ける方法が採られていた。しかし、こうした方法では
嵌合面と空気との接触を有効に防止できるわけではなく
、黒鉛が徐々に酸化されることによって空気の吸い込み
が起こシ、例えば３チヤージ目以降の鋼中窒素濃度は１
，２チヤージ目と比較すると３倍以上になっていた。ま
た、不活性ガスの使用量も多いという欠点があった。Conventionally, in order to prevent the above-mentioned air intake, Ar
A method was adopted in which an inert gas such as 100% gas was directly sprayed onto the fitting part between the nozzle attached to the lower part of the tundish or ladle and the immersion nozzle. However, these methods do not effectively prevent contact between the mating surfaces and air, and the graphite gradually oxidizes, causing air to be sucked in. For example, after the third charge, the nitrogen concentration in the steel decreases to 1.
, compared to the second charge, it was more than three times as large. Another drawback is that a large amount of inert gas is used.
そこで、第１図に示すような構造の浸漬ノズルが用いら
れるように彦ってきている。Therefore, immersion nozzles having a structure as shown in FIG. 1 are increasingly being used.
図中１は図示しないタンディツシュの下部に配設された
スライディングノズルの下ノズルであり、このスライデ
ィングノズルの下ノズル１の下部には浸漬ノズル７が嵌
合され、図示しないホルダによって保持されている。こ
の浸漬ノズルそはアルミナ−黒鉛製の浸漬ノズル本体３
の上部にアルミナ製の環状の多孔質レンガ４を、浸漬ノ
ズル主の上面（嵌合面）及び内面の一部をなすように嵌
着するとともに、この多孔質レンガ゛４の外周の一部を
取り囲むようにガス均圧帯５を形成し、このガス均圧帯
５に連通ずるガス導入口６を設けた構造となっている。In the figure, 1 is a lower nozzle of a sliding nozzle disposed at the lower part of a tundish (not shown), and an immersion nozzle 7 is fitted in the lower part of the lower nozzle 1 of the sliding nozzle, and is held by a holder (not shown). This immersion nozzle is an immersion nozzle body 3 made of alumina-graphite.
An annular porous brick 4 made of alumina is fitted onto the top of the immersion nozzle so that it forms part of the upper surface (fitting surface) and inner surface of the main part of the immersion nozzle. It has a structure in which a gas pressure equalizing zone 5 is formed so as to surround it, and a gas inlet 6 communicating with this gas pressure equalizing zone 5 is provided.
上記浸漬ノズル且の作用を説明する。浸漬ノズル２をス
ライディングノズルの下ノズル１に嵌合した後、ガス導
入口６からＡｒなどの不活性ガスを導入すると、ガスは
ガス均圧帯５に充満し、多孔質レンガ４を通して浸漬ノ
ズル考の嵌合面及び内面に噴出する。The operation of the above-mentioned immersion nozzle will be explained. After fitting the immersion nozzle 2 to the lower nozzle 1 of the sliding nozzle, when an inert gas such as Ar is introduced from the gas inlet 6, the gas fills the gas equalization zone 5 and passes through the porous brick 4 to the immersion nozzle. Sprays on the mating surface and inner surface of the
しかして、上記浸漬ノズルｌによれば、嵌合面からの空
気の吸い込みをかなり有効に防止することができる。し
たがって、５チヤージ目でも１，２チヤージ目と同レベ
ルの窒素濃度を有する鋼を得ることができ、また、不活
性ガ゛スを嵌合部に直接吹き込む方法と比較して不活性
ガスの使用量はＩＡ以下となる。According to the above-mentioned immersion nozzle I, it is possible to quite effectively prevent air from being sucked in from the fitting surface. Therefore, even at the 5th charge, it is possible to obtain steel with the same level of nitrogen concentration as at the 1st and 2nd charges. The amount will be less than IA.
しかしながら、上記浸漬ノズル且を使用した場合、鋼片
にピンホールが発生したり、鋼中の窒素濃度がそれほど
低下せず、上記浸漬ノズル主を用いた場合でも嵌合面か
らの空気の吹い込みが起こっていることが判明した。ま
た、多孔質レンガ４が溶鋼と直接接触するため、浸食さ
れ易く、浸漬ノズル且の孔径が拡大するという欠点がお
った。However, when the above-mentioned immersion nozzle is used, pinholes occur in the steel piece, the nitrogen concentration in the steel does not decrease significantly, and even when the above-mentioned immersion nozzle is used, air is blown from the mating surface. It turned out that this was happening. Furthermore, since the porous bricks 4 come into direct contact with the molten steel, they are easily eroded and the pore diameter of the immersion nozzle is enlarged.
本発明は上記事情に鑑みてなされたものであり、ピンホ
ールがなく、窒素濃度の低い鋼を得ることができる連続
鋳造用浸漬ノズルを提供しようとするものである。The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an immersion nozzle for continuous casting that is free from pinholes and can produce steel with a low nitrogen concentration.
本発明者らは上記浸漬ノズル互を使用した場合に、嵌合
面からの空気の吸い込みが起こる原因について種々検討
した結果、上記浸漬ノズル２Ｃは多孔質レンガ４が浸漬
ノズル芭の内面ニ露出しているため、流下する溶鋼によ
って多孔質レンガ４の内面側が負圧となるためであるこ
５−
と全見出し、本発明をなすに至った。The inventors of the present invention investigated various causes of air suction from the mating surface when using the above-mentioned immersion nozzle mutually, and found that the above-mentioned immersion nozzle 2C has a structure in which the porous brick 4 is exposed to the inner surface of the immersion nozzle cover. The inventors have discovered that this is because the flowing molten steel creates a negative pressure on the inner surface of the porous brick 4, leading to the present invention.
すなわち、本発明の連続鋳造用浸漬ノズルは多孔質耐火
物を浸漬ノズル本体の内面から５叫以上隔てて浸漬ノズ
ル本体の上部に嵌着したことを特徴とするものである。That is, the immersion nozzle for continuous casting of the present invention is characterized in that a porous refractory is fitted onto the upper part of the immersion nozzle body with a distance of at least 5 mm from the inner surface of the immersion nozzle body.
このように多孔質耐火物を溶鋼が流下する内面に露出し
ないように嵌着すれば、溶鋼の流下によって内面側の圧
力が低下しても嵌合面からの空気の吸い込みを有効に防
止することができる。また、多孔質耐火物の浸食も防止
することができる。If the porous refractory is fitted in such a way that it is not exposed on the inner surface where the molten steel flows down, air can be effectively prevented from being sucked in from the fitting surface even if the pressure on the inner surface side decreases due to the flow of molten steel. I can do it. Furthermore, erosion of porous refractories can also be prevented.
本発明に用いられるアルミナ−黒鉛系の浸漬ノズル本体
の材質はアルミナ−黒鉛質、アルミナ−シリカ−黒鉛質
、アルミナ−シリカ−ケイ素−黒鉛質等いずれでもよい
。The material of the alumina-graphite immersion nozzle body used in the present invention may be any of alumina-graphite, alumina-silica-graphite, alumina-silica-silicon-graphite, and the like.
また、本発明に用いられる多孔質耐火物としてはアルミ
ナ質、アルミナ−シリカ質等の多孔質レンガ等を挙げる
ことができる。この多孔質耐火物の形状１寸法は浸漬ノ
ズル本体の構造。Moreover, porous refractories used in the present invention include porous bricks made of alumina, alumina-silica, and the like. One dimension of the shape of this porous refractory is the structure of the immersion nozzle body.
材質等によシ適宜変更できる。It can be changed as appropriate depending on the material etc.
６一
本発明の浸漬ノズルにおいては多孔質耐火物が溶鋼が流
下する内面に露出しないように嵌着すればよいわけであ
るが、浸漬ノズル本体の内面から５憫以上隔てて嵌着す
ることとしたのは、浸漬ノズル本体の内面から多孔質耐
火物までの距離が５調未溝になると、その部分の強度が
低下し、浸漬ノズル本体と多孔質耐火物の熱膨張の差に
よる応力に耐えられないためである。61 In the immersion nozzle of the present invention, it is sufficient to fit the porous refractory so that it is not exposed to the inner surface through which molten steel flows, but it is necessary to fit it so that it is separated from the inner surface of the immersion nozzle body by at least 5 inches. The reason for this is that when the distance from the inner surface of the immersion nozzle body to the porous refractory becomes 5 mm, the strength of that part decreases, making it difficult to withstand stress due to the difference in thermal expansion between the immersion nozzle body and the porous refractory. This is so that you will not be affected.
また、本発明において多孔質耐火物の少なくとも一部が
タンディッシーの下部に設けられたノズルの下面外周か
ら露出するようにすれば、不活性ガスを積極的に外部へ
噴出させることができるので、嵌合面からの空気の吸い
込みをより有効に防止することができる。Furthermore, in the present invention, if at least a part of the porous refractory is exposed from the outer periphery of the lower surface of the nozzle provided at the lower part of the tundish, the inert gas can be actively ejected to the outside. Air suction from the fitting surface can be more effectively prevented.
以下、本発明の実施例を第２図を参照して説明する。Hereinafter, embodiments of the present invention will be described with reference to FIG.
図中１は図示しないタンディッシーの下部に配設された
スライディングノズルの下ノズルであり、このスライデ
ィングノズルの下ノズル１の下部には浸漬ノズルＬノが
嵌合され、図示しないホルダによって保持されている。In the figure, 1 is a lower nozzle of a sliding nozzle arranged at the lower part of a tandishy (not shown), and an immersion nozzle L is fitted into the lower part of the lower nozzle 1 of this sliding nozzle, and is held by a holder (not shown). There is.
この浸漬、／ノル１ｌ（Ｄアルミナ−黒鉛製の浸漬ノズ
ル本体１２の上部にはアルミナ製の環状の多孔質レンガ
１３が浸漬ノズルＬ」の上面（嵌合面）の一部をなすよ
うに、浸漬ノズル本体１２ （Ｄ 上部内面から１０■
隔てて嵌着されている。前記多孔質レンガ１３の一部は
スライディングノズルの下ノズル１の下面外周から露出
している。また、この多孔質レンガ１３の下部外周の一
部は切欠されており、浸漬ノズル本体１２との間に空隙
部が形成され、多孔質レンガ１３の外周の一部を取シ囲
むガス均圧帯１４となっている。During this immersion, /Nor 1L (D) An annular porous brick 13 made of alumina is placed on the top of the immersion nozzle body 12 made of alumina-graphite so that it forms part of the upper surface (fitting surface) of the immersion nozzle L. Immersion nozzle body 12 (D 10cm from the upper inner surface
They are fitted separately. A portion of the porous brick 13 is exposed from the outer periphery of the lower surface of the lower nozzle 1 of the sliding nozzle. In addition, a part of the lower outer periphery of the porous brick 13 is cut out, and a gap is formed between the porous brick 13 and the immersion nozzle body 12, and a gas pressure equalization zone surrounding a part of the outer periphery of the porous brick 13. It is 14.
また、浸漬ノズル本体１２にはガス均圧帯１４と連通ず
るガス導入口１５が穿設されている。Further, the submerged nozzle main body 12 is provided with a gas inlet 15 that communicates with the gas pressure equalization zone 14 .
上記浸漬ノズル１１０作用を説明する。浸漬ノズル１１
をスライディングノズルの下ノズルＩに嵌合して保持し
た後、ガス導入口１５〃）らＡｒなどの不活性ガスを導
入すると、ガスはガス均圧帯Ｉ４に充満し、多孔質レン
ガ１３を通して浸漬ノズル１１の嵌合面において図中矢
印で示す如くｖａノズル１１の内面方向及び外周方向へ
噴出する。The operation of the above-mentioned immersion nozzle 110 will be explained. Immersion nozzle 11
is fitted and held in the lower nozzle I of the sliding nozzle, and then an inert gas such as Ar is introduced from the gas inlet 15), the gas fills the gas equalization zone I4 and passes through the porous brick 13 to immerse it. At the fitting surface of the nozzle 11, it is ejected toward the inner surface and outer circumferential direction of the VA nozzle 11, as shown by the arrows in the figure.
しかして、上記浸漬ノズル１１によれば、多孔質レンガ
１３が溶鋼が流下する浸漬ノズルＨの内面に露出してい
ないので、溶鋼の流下による内面側の圧力の低下の影響
をほとんど受けることがない。まだ、多孔質レンガ１３
はスライディングノズルの下ノズル１の下面外周から露
出しているので、常に不活性ガスを外部に噴出すること
ができ、効果的に空気の吸い込みを防止することができ
る。したがって、上記浸漬ノズル１１を用いて製造され
る鋼製品にはピンホールは発生せず、また鋼中窒素濃度
も低下することができた。更に、多孔質レンガ１３は溶
鋼と直接接触しないので、浸食されることはなく、浸漬
ノズルエＪの孔径の拡大も発生しなかった。According to the immersion nozzle 11, the porous bricks 13 are not exposed on the inner surface of the immersion nozzle H through which the molten steel flows down, so that they are hardly affected by the drop in pressure on the inner surface side due to the molten steel flowing down. . Still, porous brick 13
is exposed from the outer periphery of the lower surface of the lower nozzle 1 of the sliding nozzle, so inert gas can always be ejected to the outside and air can be effectively prevented from being sucked in. Therefore, no pinholes were generated in the steel products manufactured using the immersion nozzle 11, and the nitrogen concentration in the steel was also reduced. Furthermore, since the porous brick 13 did not come into direct contact with molten steel, it was not eroded, and the pore diameter of the immersion nozzle J did not expand.
なお、本発明の浸漬ノズルは第２図図示の浸漬ノズル１
１のような構造のものに限らず、第３図図示の構造のも
のでもよい。すなわち、第３図図示の浸漬ノズル２１は
、浸漬ノズル本体９−
２２の上部に該浸漬ノズル本体２２の内面から５咽以上
隔てて環状の多孔質レンガ２３を嵌着し、この多孔質レ
ンガ２３と浸漬ノズル本体２２の上部外周にモルタル２
４によって固定された鉄皮２５との間にガス均圧帯２６
を形成するとともに、鉄皮２５にガス均圧帯２６と連通
ずるガス導入口２７を設けたものである。The immersion nozzle of the present invention is the immersion nozzle 1 shown in FIG.
The structure is not limited to the structure shown in FIG. 1, but may be the structure shown in FIG. That is, in the immersion nozzle 21 shown in FIG. 3, an annular porous brick 23 is fitted onto the upper part of the immersion nozzle body 9-22 at a distance of at least 5 mm from the inner surface of the immersion nozzle body 22. and mortar 2 on the upper outer periphery of the immersion nozzle body 22.
A gas equalization zone 26 is placed between the steel skin 25 fixed by the
In addition, the iron skin 25 is provided with a gas inlet 27 that communicates with the gas pressure equalization zone 26.
また、上記実施例ではタンディツシュ下部に配設された
スライディングノズルに浸漬ノズルを嵌合し、保持させ
た場合について説明したが、メンディツシュ下部にオー
プンノズルを配設した場合、あるいは取鍋下部にスライ
ディングノズル、オープンノズルを配設した場合にも同
様に本発明の浸漬ノズルを適用できることは勿論である
。In addition, in the above embodiment, the immersion nozzle was fitted and held in the sliding nozzle placed at the bottom of the mendish, but if an open nozzle is installed at the bottom of the mendish, or a sliding nozzle is installed at the bottom of the ladle. Of course, the immersion nozzle of the present invention can also be applied to the case where an open nozzle is provided.
以上詳述した如く、本発明によればピンホールがなく、
窒素濃度の低い鋼を製造し得る連続鋳造用浸漬ノズルを
提供できるものである。As detailed above, according to the present invention, there is no pinhole,
It is possible to provide a continuous casting immersion nozzle that can produce steel with a low nitrogen concentration.
第１図は従来の連続鋳造用浸漬ノズルの断面１０−
図、第２図は本発明の実施例における連続鋳造用浸漬ノ
ズルの断面図、第３図は本発明の他の実施例における連
続鋳造用浸漬ノズルの断面図である。
１・・・スライディングノズルの下ノズル、１１ｔ」・
・・浸漬ノズル、１２．２２・・・浸漬ノズル本体、１
３．２３・・・多孔質レンガ、１４．２６・・・ガス均
圧帯、１５．２７・・・ガス導入口、２４・・・モルタ
ル、２５・・・鉄皮。
出願人代理人 弁理士 鈴 江 武 彦１１−
矛１図
矛２図
矛３図FIG. 1 is a cross-sectional view of a conventional continuous casting immersion nozzle, FIG. 2 is a cross-sectional view of a continuous casting immersion nozzle according to an embodiment of the present invention, and FIG. 3 is a continuous casting immersion nozzle according to another embodiment of the present invention. It is a sectional view of the submerged nozzle for use. 1...lower nozzle of sliding nozzle, 11t"・
...Immersion nozzle, 12.22...Immersion nozzle body, 1
3.23...Porous brick, 14.26...Gas equalization zone, 15.27...Gas inlet, 24...Mortar, 25...Iron shell. Applicant's agent Patent attorney Takehiko Suzue 11- 1 figure, 2 figures, 3 figures
Claims (2)
にアルミナ−黒鉛系の浸漬ノズル本体を嵌合して保持し
、かつ浸漬ノズル本体上部に嵌着された環状の多孔質耐
火物金倉して前記ノズルと浸漬ノズル本体との嵌合面に
不活性ガスを噴出するようにした外挿式の連続鋳造用浸
漬ノズルにおいて、前記多孔質耐火物を浸漬ノズル本体
の内面から５ｍ以上隔てて浸漬ノズル本体上部に嵌着し
たことを特徴とする連続鋳造用浸漬ノズル。(1) An alumina-graphite based immersion nozzle body is fitted and held in a nozzle attached to the lower part of a container in which molten steel is stored, and an annular porous refractory metal container is fitted to the upper part of the immersion nozzle body. In the external type continuous casting immersion nozzle, the porous refractory is separated by 5 m or more from the inner surface of the immersion nozzle body, and inert gas is ejected onto the fitting surface of the nozzle and the immersion nozzle body. An immersion nozzle for continuous casting characterized by being fitted onto the upper part of the immersion nozzle body.
る容器の下部に装着されたノズルの下面外周から露出す
るようにしたことを特徴とする特許請求の範囲第１項記
載の連続鋳造用浸漬ノズル。(2) Continuous casting according to claim 1, characterized in that at least a part of the porous refractory is exposed from the outer periphery of the lower surface of a nozzle attached to the lower part of a container in which molten steel is stored. Immersion nozzle for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10193983A JPS59225862A (en) | 1983-06-08 | 1983-06-08 | Immersion nozzle for continuous casting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10193983A JPS59225862A (en) | 1983-06-08 | 1983-06-08 | Immersion nozzle for continuous casting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59225862A true JPS59225862A (en) | 1984-12-18 |
| JPH0330461B2 JPH0330461B2 (en) | 1991-04-30 |
Family
ID=14313869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10193983A Granted JPS59225862A (en) | 1983-06-08 | 1983-06-08 | Immersion nozzle for continuous casting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59225862A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62279072A (en) * | 1986-05-24 | 1987-12-03 | Kurosaki Refract Co Ltd | Nozzle for pouring molten metal |
| WO1997004901A1 (en) * | 1995-07-27 | 1997-02-13 | Usx Engineers And Consultants, Inc. | Limiting ingress of gas to continuous caster |
| US5670075A (en) * | 1996-01-22 | 1997-09-23 | Usx Corporation | Sealing gas delivery system for sliding joints |
| US5676195A (en) * | 1995-07-27 | 1997-10-14 | Usx Corporation | Method of and apparatus for limiting ingress of gas to incipient continuous cast slabs |
| EP1757386A1 (en) * | 2005-08-27 | 2007-02-28 | Refractory Intellectual Property GmbH & Co. KG | A refractory pouring tube with porous insert |
| JP2007229798A (en) * | 2006-03-03 | 2007-09-13 | Nippon Steel Corp | Nozzle for continuous casting |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6630461B1 (en) * | 2019-08-09 | 2020-01-15 | 株式会社Adeka | Agricultural film, agricultural film-forming resin composition, and plant growing method using the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS518015U (en) * | 1974-07-04 | 1976-01-21 | ||
| JPS517459A (en) * | 1974-07-05 | 1976-01-21 | Mitsubishi Electric Corp | DOKIKENSHUTSUSOCHI |
-
1983
- 1983-06-08 JP JP10193983A patent/JPS59225862A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS518015U (en) * | 1974-07-04 | 1976-01-21 | ||
| JPS517459A (en) * | 1974-07-05 | 1976-01-21 | Mitsubishi Electric Corp | DOKIKENSHUTSUSOCHI |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62279072A (en) * | 1986-05-24 | 1987-12-03 | Kurosaki Refract Co Ltd | Nozzle for pouring molten metal |
| WO1997004901A1 (en) * | 1995-07-27 | 1997-02-13 | Usx Engineers And Consultants, Inc. | Limiting ingress of gas to continuous caster |
| US5676195A (en) * | 1995-07-27 | 1997-10-14 | Usx Corporation | Method of and apparatus for limiting ingress of gas to incipient continuous cast slabs |
| GB2314038A (en) * | 1995-07-27 | 1997-12-17 | Uss Eng & Consult | Limiting ingress of gas to continuous caster |
| GB2314038B (en) * | 1995-07-27 | 1998-12-30 | Uss Eng & Consult | Limiting ingress of gas to continuous caster |
| US5670075A (en) * | 1996-01-22 | 1997-09-23 | Usx Corporation | Sealing gas delivery system for sliding joints |
| EP1757386A1 (en) * | 2005-08-27 | 2007-02-28 | Refractory Intellectual Property GmbH & Co. KG | A refractory pouring tube with porous insert |
| WO2007025601A1 (en) * | 2005-08-27 | 2007-03-08 | Refractory Intellectual Property Gmbh & Co. Kg | A refractory pouring tube with porous insert |
| US8056776B2 (en) | 2005-08-27 | 2011-11-15 | Refractory Intellectual Property Gmbh & Co. Kg | Refractory pouring tube with porous insert |
| JP2007229798A (en) * | 2006-03-03 | 2007-09-13 | Nippon Steel Corp | Nozzle for continuous casting |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0330461B2 (en) | 1991-04-30 |
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