JPH0112582B2 - - Google Patents

Info

Publication number
JPH0112582B2
JPH0112582B2 JP27119685A JP27119685A JPH0112582B2 JP H0112582 B2 JPH0112582 B2 JP H0112582B2 JP 27119685 A JP27119685 A JP 27119685A JP 27119685 A JP27119685 A JP 27119685A JP H0112582 B2 JPH0112582 B2 JP H0112582B2
Authority
JP
Japan
Prior art keywords
nozzle
inert gas
air pocket
long nozzle
inner brick
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
JP27119685A
Other languages
Japanese (ja)
Other versions
JPS62130753A (en
Inventor
Mitsuru Ando
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Akechi Ceramics Co Ltd
Original Assignee
Akechi Ceramics Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Akechi Ceramics Co Ltd filed Critical Akechi Ceramics Co Ltd
Priority to JP27119685A priority Critical patent/JPS62130753A/en
Publication of JPS62130753A publication Critical patent/JPS62130753A/en
Publication of JPH0112582B2 publication Critical patent/JPH0112582B2/ja
Granted legal-status Critical Current

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Description

【発明の詳細な説明】[Detailed description of the invention]

(産業上の利用分野) この発明は、金属の連続鋳造法において、例え
ば、取鍋とタンデイツシユとの間を金属の溶湯を
空気から遮断し酸化を防止したり、スプラツシユ
の飛散を防ぎつつ注湯するために使用されるロン
グノズルのトツプ接合部におけるエヤシール及び
タンデイツシユ内の非金属介在物の浮上促進を目
的として行なわれる不活性ガス吹込方法に用いら
れる連続鋳造用ノズルに関するものである。 (従来技術) 従来ロングノズルのトツプ部での不活性ガスの
吹込方法は、取鍋コレクターノズルとの接合上の
エヤーシール性を確保する目的では、図面第1図
のようなロングノズルトツプ部に不活性ガスの吹
込用貫通孔を設け、このスリツトを介して不活性
ガス吹込みが行なわれていた。また浸漬ノズルに
おいても接合部のエヤーシール性を高めるため
に、同様な方法が用いられていた。 (発明が解決しようとする問題点) 従来このような方法については、次に挙げるよ
うな種々の問題点があつた。 即ち、通常連続鋳造での取鍋一杯分の金属溶湯
の注入末期では、スラグ切りを行なうために注入
量を絞りながら溶湯注入を行なうが、従来ではこ
の時にノズル接合部へ地金が逆流することによ
り、不活性ガスの投入用パイプが溶けてガス投入
続行不能となつたり、逆流時の火花などにより、
作業安全上問題となるケースが多かつた。 従つて、従来は上述などの連続鋳造の安定的操
業を阻害する要因となつていたことから、これの
対策が強く待たれている趨勢にあつた。 (問題点を解決するための手段) この発明は前記背景から、これらの問題点を解
決すべくなされたものであり、その詳細を取鍋コ
レクターノズルとロングノズルトツプ部との接合
シール例にて述べる。 即ち、この発明は、ロングノズルトツプ部の取
鍋コレクターとの接合シール部にロングノズルと
同材質または同等の高耐スポール性、高耐溶鋼性
を併せ備えた材質から成り、ロングノズルにセツ
トした状態で不活性ガスの導入吹込用の複数の連
通スリツトと、この連通スリツト部に2個所の第
1,2エヤポケツトが形成されるように構成され
たインナーブリツクを、モルタルを介しロングノ
ズルにセツトし、その外側を鉄皮保護して成る不
活性ガスバブリングによる高シール性連続鋳造用
ノズルを提供するにある。 つまりこの発明は、本体のトツプ部の一部を分
離した形で本体との接合部の2個所に複数の放射
状溝及び外周の凹みをそれぞれ有した構造のイン
ナーブリツクをトツプに組み合わせ配設して、不
活性ガス導入及び吹込用の複数の連通スリツト並
びに2個所の第1,2エヤポケツトを形成したこ
とを特徴とする連続鋳造用ノズルである。 次に、この発明を図面により詳細に説明する。
なお、インナーブリツク本体の材質の一例とし
て、黒鉛18重量%、アルミナ72重量%、炭化珪素
5重量%、シリカ5重量%により構成される骨材
部に8重量%の有機バインダーを添加した配合物
を加熱混練後、粒度調整して得られた坏土をプレ
スにて加圧成形し焼成したものを使用した。 まず、第1図は従来タイプとして考えられた手
段で、不活性ガス吹込用連通孔を有するインナー
ブリツク3′をロングノズル1′にセツトし、取鍋
コレクターノズル2′へ接合したセツト図で、不
活性ガス導入口5′からの不活性ガスは、エアポ
ケツト6′から複数個のスリツト8′の貫通孔と溝
によつて吹込まれる。なお10′は保護鉄皮であ
る。 この発明を各実施例について説明する。まず第
2図は、この発明のガスバブリング用連通スリツ
トに2個所のエヤポケツトを形成すべく構成のイ
ンナーブリツクを装備したロングノズルの取鍋コ
レクターノズルへのセツト図であつて、1はロン
グノズル、2は取鍋コレクターノズル、4はイン
ナーブリツク、5は不活性ガス導入口、6は第1
エヤポケツト、7は第2エヤポケツト、8はガス
導入用連通スリツト、9はガス吹込用連通スリツ
ト、10は保護鉄皮、11はインナーブリツクと
ロングノズルとを又はロングノズルと鉄皮とを接
合するための耐火モルタル、12はコレクターノ
ズル2とインナーブリツク4とのシール性を高め
るために使用されるシール材である。 次に、第3図及び第4図は夫々この発明の実施
例であつて、詳しくはコレクターノズル2とロン
グノズル1との接合部へのバブリングを主体とし
たものが第3図で、インナーブリツク4が浅い例
を示す。 また第4図はインナーブリツク4下面をフラツ
トとし、ロングノズル1側へ連通スリツト8,9
並びに第1エヤポケツト6、第2エヤポケツト7
を配した例を示すもので、従つてこの連通スリツ
ト8,9と第1,2エヤポケツト6,7は、イン
ナーブリツク4側に配することもロングノズル1
側に配することも可能で、目的に対し何等の影響
もない。 次に第5図ア,イは、インナーブリツク4での
連通スリツト8,9及び第1,2エヤポケツト
6,7の配置例を示す図面で、4はインナーブリ
ツク本体、6aは第1エヤポケツト6を形成する
面、7aは第2エヤポケツト7を形成する面、8
は連通ガス導入スリツト(面)、9は連通ガス吹
込スリツト(面)を夫々示し、Cはコレクターノ
ズル2との接合面である。ここで上記連通スリツ
ト8と9の円周上での位置がずれ、合致しないの
が一つの特徴である。 この発明は、以上のような構成より成るインナ
ーブリツク4をロングノズル1や浸漬ノズルなど
CC用ノズルに配置し、接合部のシールやTD内へ
の非金属介在物対策としての不活性ガスのバブリ
ングなどを必要部位へ適量均一に行なうことを可
能ならしめたものである。なお、各図中Aはコレ
クターノズル内孔、Bはロングノズル内孔であ
る。 (発明の効果) この発明の連続鋳造用ノズルは叙上の構成であ
り、ガス吹込みについての機能は、不活性ガスが
まず導入口5より第1エヤポケツト6を介して連
通スリツト8に均一に導入される。そして第2エ
ヤポケツト7で再び合流し、吹込用連通スリツト
9に安定均一に分配され、ノズル内孔部へ導入さ
れるに至り、エヤポケツトが1個所(第1エヤポ
ケツト6のみ)の従来方式での吹込口近辺への吹
込ガスの集中現象が第2エヤポケツト7により完
全に均一にされた状態で円周に行き亘ることによ
り、均一なバブリングを可能ならしめた。さらに
鋳造末期にガスバブリングの不均一が災いし、こ
の接合部へ地金が侵入することで、従来の方法で
は不活性ガス導入口5まで、地金がダイレクトに
達することによりトラブルを招いていたが、この
発明では、中間にもう1個所第2エヤポケツト7
を設けたことによる均一なバブリングの実現効果
と、万一、地金(溶鋼)の逆流が生じた場合で
も、この中間の第2エヤポケツト7内で地金は冷
却され固化するため、致命的なトラブルとならな
いもので、連続鋳造操業を極めて安定化し、長時
間鋳造の実現と鋳片品質の向上にも大きな効果を
もたらすものである。 この発明のノズルを取鍋、タンデイツシユ間で
ロングノズルに実際に使用したところ、前記のよ
うに安定した不活性ガスのバブリングが実現さ
れ、シール性の改善とTD内の非金属介在物の浮
上除去効果大となる結果を得た。また鋳造中の溶
鋼の接合部への逆流も大幅に抑制され、試用数20
個の内、一部分への地金の逆流が1件発生した
が、これも第2エヤポケツト7にて完全に固化
し、その効果が立証された。 以上のことなどよりノズル耐用も従来の5〜6
回耐用に対し、8〜9回へと大幅に向上を得た。
上記実用例結果を下表にて従来法と比較した。
(Industrial Application Field) This invention is useful for continuous casting of metals, for example, by blocking molten metal from air between a ladle and a tundish to prevent oxidation, and by pouring molten metal while preventing splashing. This invention relates to a continuous casting nozzle used in an inert gas blowing method for the purpose of promoting the floating of nonmetallic inclusions in an air seal and tundish at the top joint of a long nozzle used for casting. (Prior art) The conventional method of blowing inert gas at the top of a long nozzle was to inject an inert gas into the top of the long nozzle as shown in Figure 1 in order to ensure air sealing when connecting with the ladle collector nozzle. A through hole for injecting active gas was provided, and inert gas was injected through this slit. A similar method has also been used in submerged nozzles to improve the air sealing properties of the joints. (Problems to be Solved by the Invention) Conventionally, such methods have had various problems as listed below. In other words, normally at the end of pouring a ladleful of molten metal in continuous casting, the molten metal is poured while reducing the injection amount in order to cut the slag, but conventionally at this time the metal flows back into the nozzle joint. This may cause the inert gas injection pipe to melt, making it impossible to continue gas injection, or sparks from backflow, etc.
There were many cases where work safety was a problem. Therefore, since this has traditionally been a factor that hinders the stable operation of continuous casting as described above, there has been a strong demand for countermeasures against this problem. (Means for Solving the Problems) This invention has been made in order to solve these problems in view of the above background, and the details thereof are shown in an example of a joint seal between a ladle collector nozzle and a long nozzle top. state That is, in this invention, the joint seal part of the long nozzle top part with the ladle collector is made of the same material as the long nozzle or a material that has the same high spalling resistance and high resistance to molten steel, and In this state, an inner brick configured to have a plurality of communicating slits for introducing and blowing inert gas and two first and second air pockets formed in the communicating slits is set in a long nozzle through mortar. To provide a continuous casting nozzle with high sealing properties by inert gas bubbling, the outside of which is protected by an iron shell. In other words, in this invention, a part of the top part of the main body is separated, and an inner brick having a structure having a plurality of radial grooves and recesses on the outer periphery at two places at the joint with the main body is combined and arranged on the top. This is a continuous casting nozzle characterized in that a plurality of communicating slits for introducing and blowing inert gas and two first and second air pockets are formed. Next, the present invention will be explained in detail with reference to the drawings.
An example of the material of the inner brick body is a composition in which 8% by weight of an organic binder is added to the aggregate composed of 18% by weight of graphite, 72% by weight of alumina, 5% by weight of silicon carbide, and 5% by weight of silica. The clay obtained by heating and kneading the mixture and adjusting the particle size was pressed into a press and fired. First, Fig. 1 shows a set diagram of a conventional type of means, in which an inner brick 3' having a communication hole for inert gas blowing is set in a long nozzle 1' and connected to a ladle collector nozzle 2'. The inert gas from the inert gas inlet 5' is blown into the air pocket 6' through the through holes and grooves of the plurality of slits 8'. Note that 10' is a protective iron skin. This invention will be explained with reference to each embodiment. First, Fig. 2 is a diagram showing how a long nozzle equipped with an inner brick configured to form two air pockets in the communication slit for gas bubbling according to the present invention is set in a ladle collector nozzle, and 1 shows the long nozzle. , 2 is a ladle collector nozzle, 4 is an inner brick, 5 is an inert gas inlet, and 6 is a first
Air pocket, 7 is a second air pocket, 8 is a communication slit for gas introduction, 9 is a communication slit for gas blowing, 10 is a protective iron skin, 11 is a joint between the inner brick and the long nozzle or between the long nozzle and the iron skin. A refractory mortar 12 is a sealing material used to improve the sealing performance between the collector nozzle 2 and the inner brick 4. Next, FIGS. 3 and 4 respectively show embodiments of the present invention. Specifically, FIG. An example is shown in which Tsuk 4 is shallow. In addition, in Fig. 4, the lower surface of the inner brick 4 is made flat, and there are communicating slits 8, 9 to the long nozzle 1 side.
Also, the first air pocket 6 and the second air pocket 7
Therefore, the communicating slits 8 and 9 and the first and second air pockets 6 and 7 may be arranged on the inner brick 4 side or on the long nozzle 1.
It can also be placed on the side without any effect on the purpose. Next, FIGS. 5A and 5A are drawings showing examples of the arrangement of the communication slits 8, 9 and the first and second air pockets 6, 7 in the inner brick 4, where 4 is the inner brick body and 6a is the first air pocket. 6, 7a is the surface forming the second air pocket 7, and 8 is the surface forming the second air pocket 7.
9 indicates a communicating gas introduction slit (plane), 9 indicates a communicating gas blowing slit (plane), and C indicates a joint surface with the collector nozzle 2. One feature here is that the positions of the communicating slits 8 and 9 on the circumference are shifted and do not match. In this invention, the inner brick 4 having the above-mentioned configuration can be used as a long nozzle 1, a submerged nozzle, etc.
When placed in the CC nozzle, it is possible to uniformly apply an appropriate amount of inert gas to the required areas for sealing joints and bubbling inert gas as a countermeasure against non-metallic inclusions in the TD. In each figure, A is the inner hole of the collector nozzle, and B is the inner hole of the long nozzle. (Effects of the Invention) The continuous casting nozzle of the present invention has the above-mentioned configuration, and its function regarding gas injection is such that the inert gas is first uniformly introduced into the communication slit 8 from the inlet 5 through the first air pocket 6. be introduced. Then, they join together again at the second air pocket 7, are stably and uniformly distributed to the communication slit 9 for blowing, and are introduced into the nozzle inner hole. The phenomenon of concentration of the blown gas near the mouth is made completely uniform by the second air pocket 7 and spreads over the circumference, making uniform bubbling possible. Furthermore, uneven gas bubbling is a problem in the final stage of casting, and the metal intrudes into this joint, causing problems in the conventional method as the metal directly reaches the inert gas inlet 5. However, in this invention, there is another second air pocket 7 in the middle.
Even if a backflow of the base metal (molten steel) occurs, the base metal will be cooled and solidified in the second air pocket 7 in the middle, so it will not be fatal. This method does not cause any trouble, extremely stabilizes continuous casting operations, and has a great effect on realizing long casting times and improving the quality of slabs. When the nozzle of this invention was actually used in a long nozzle between a ladle and a tundish, stable bubbling of inert gas was achieved as described above, improving sealing performance and removing non-metallic inclusions in the TD. We obtained highly effective results. In addition, the backflow of molten steel to the joints during casting was significantly suppressed, and the number of trials was 20.
Although there was one case of backflow of metal into a part of the container, this was also completely solidified in the second air pocket 7, proving its effectiveness. Due to the above factors, the nozzle lifespan is 5-6 compared to the conventional one.
The durability was significantly improved to 8 to 9 times.
The above practical example results are compared with the conventional method in the table below.

【表】 数で示す。
以上のようにこの発明ノズルは連続鋳造に於け
る操業の安定化やコストダウン並に鋳片の品質向
上に極めて大きな効果がもたらされるものであ
る。
[Table] Shown by numbers.
As described above, the nozzle of the present invention has extremely significant effects on stabilizing operations in continuous casting, reducing costs, and improving the quality of slabs.

【図面の簡単な説明】[Brief explanation of drawings]

図面はこの発明ノズルの実施例を示すものであ
つて、第1図は従来タイプとして考えられた手段
によるセツト状態の縦断正面図、第2図はこの発
明のセツト状態を示した縦断正面図、第3図及び
第4図は夫々実施例の縦断正面図、第5図アはイ
ンナーブリツクの連通スリツト及びエヤポケツト
配置例を示した縦断正面図、同図イは同上の底面
図である。 1,1′……ロングノズル、2,2′……コレク
ターノズル、3′……インナーブリツク、4……
インナーブリツク、5,5′……不活性ガス導入
口、6……第1エヤポケツト、6a……第1エヤ
ポケツト形成面、7……第2エヤポケツト、7a
……第2エヤポケツト形成面、8……ガス導入用
連通スリツト、8′……スリツト、9……ガス吹
込用連通スリツト、10,10′……鉄皮、11
……耐火モルタル、12……シール材。
The drawings show an embodiment of the nozzle of the present invention, in which FIG. 1 is a longitudinal sectional front view showing a set state using means considered as a conventional type, and FIG. 2 is a longitudinal sectional front view showing a set state of the present invention. 3 and 4 are respectively longitudinal sectional front views of the embodiment, FIG. 1, 1'... Long nozzle, 2, 2'... Collector nozzle, 3'... Inner brick, 4...
Inner brick, 5, 5'... Inert gas inlet, 6... First air pocket, 6a... First air pocket forming surface, 7... Second air pocket, 7a
...Second air pocket forming surface, 8...Communication slit for gas introduction, 8'...Slit, 9...Communication slit for gas injection, 10, 10'...Iron shell, 11
...Refractory mortar, 12...Sealing material.

Claims (1)

【特許請求の範囲】[Claims] 1 本体のトツプ部の一部を分離した形で本体と
の接合部の2個所に複数の放射状溝及び外周の凹
みをそれぞれ有した構造のインナーブリツクをト
ツプに組み合わせ配設して、不活性ガス導入及び
吹込用の複数の連通スリツト並びに2個所の第
1,2エヤポケツトを形成したことを特徴とする
連続鋳造用ノズル。
1 A part of the top part of the main body is separated, and an inner brick having a structure that has multiple radial grooves and recesses on the outer periphery at two places at the joint with the main body is combined with the top and is inert. A nozzle for continuous casting, characterized in that a plurality of communicating slits for introducing and blowing gas and two first and second air pockets are formed.
JP27119685A 1985-12-02 1985-12-02 Nozzle for continuous casting Granted JPS62130753A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27119685A JPS62130753A (en) 1985-12-02 1985-12-02 Nozzle for continuous casting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27119685A JPS62130753A (en) 1985-12-02 1985-12-02 Nozzle for continuous casting

Publications (2)

Publication Number Publication Date
JPS62130753A JPS62130753A (en) 1987-06-13
JPH0112582B2 true JPH0112582B2 (en) 1989-03-01

Family

ID=17496686

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27119685A Granted JPS62130753A (en) 1985-12-02 1985-12-02 Nozzle for continuous casting

Country Status (1)

Country Link
JP (1) JPS62130753A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104057078A (en) * 2013-11-20 2014-09-24 攀钢集团攀枝花钢铁研究院有限公司 Long nozzle and continuous casting method

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5613545A (en) * 1991-11-12 1997-03-25 Shinagawa Refractories Co. Ltd. Inert gas injecting plate brick or insert nozzle brick for use in a sliding gate valve apparatus of molten metal
EP0646430B1 (en) * 1992-06-18 2000-08-02 Shinagawa Refractories Co., Ltd. Refractory block for continuous casting
JP5755259B2 (en) * 2013-01-09 2015-07-29 東京窯業株式会社 Long nozzle for continuous casting
WO2018235801A1 (en) 2017-06-20 2018-12-27 黒崎播磨株式会社 Casting nozzle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104057078A (en) * 2013-11-20 2014-09-24 攀钢集团攀枝花钢铁研究院有限公司 Long nozzle and continuous casting method

Also Published As

Publication number Publication date
JPS62130753A (en) 1987-06-13

Similar Documents

Publication Publication Date Title
JPH0315244Y2 (en)
JPH0224510Y2 (en)
JP2934187B2 (en) Long nozzle for continuous casting
JPH07308757A (en) Sliding nozzle plate
US4076224A (en) Tundishes
JPS62130753A (en) Nozzle for continuous casting
JP3207793B2 (en) Immersion nozzle for continuous casting
JPH04270037A (en) Continuous casting nozzle
JPS5732858A (en) Immersion nozzle for continuous casting of molten steel
JPS6228052A (en) Nozzle for introducing molten metal
JPH02104454A (en) Nozzle for continuous casting
JPS586943A (en) Refractories for blowing of gas for refining of molten metal
JPS63303666A (en) Submerged nozzle for continuous casting
JPH0320035Y2 (en)
JPH0120051Y2 (en)
JP2000061594A (en) Gas blowing plug
JPS6135336Y2 (en)
JPS6135342Y2 (en)
JP4264286B2 (en) Continuous casting nozzle
JPH0232673Y2 (en)
JPH0510183B2 (en)
JPH034434Y2 (en)
JPS6243655Y2 (en)
JP3546483B2 (en) Method of strengthening local heat resistance for cast iron and welding wire used therefor
JPH0222135Y2 (en)

Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees