JP2633776B2 - Injection nozzle for continuous casting of wide thin cast slabs - Google Patents
Injection nozzle for continuous casting of wide thin cast slabsInfo
- Publication number
- JP2633776B2 JP2633776B2 JP22707492A JP22707492A JP2633776B2 JP 2633776 B2 JP2633776 B2 JP 2633776B2 JP 22707492 A JP22707492 A JP 22707492A JP 22707492 A JP22707492 A JP 22707492A JP 2633776 B2 JP2633776 B2 JP 2633776B2
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- molten metal
- continuous casting
- thin cast
- injection nozzle
- 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 - Fee Related
Links
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Continuous Casting (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は双ロール法、ドラム・ベ
ルト法、双ベルト法など移動鋳型による広幅薄肉鋳片の
連続鋳造に関し、特に流量制御の応答性を高めるために
容易に溶湯を充満できる注入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 continuous casting of wide and thin cast slabs using a moving mold such as a twin-roll method, a drum-belt method, a twin-belt method and the like. A possible injection nozzle.
【０００２】[0002]
【従来の技術】広幅薄肉鋳片の注入ノズルには、主とし
て特開昭６２−２８２７５３号公報に記された中間ノズ
ルを組み込み、スリット状の吐出口を有するノズル本体
で構成されたものが使用されている。ノズル本体外部の
側面には均一に予熱するために、通電加熱用電極を装着
している。ノズル本体下方内部には、整流化を目的に耐
火物製フィルターを内蔵している。また、特開昭６２−
１２４０５２号公報に記載されたように、耐火物製フィ
ルター上部に溶湯によって溶融するスタート板を設置
し、溶湯を充満するまで鋳型への注入を抑制している。2. Description of the Related Art As an injection nozzle for wide and thin cast slabs, an injection nozzle mainly including an intermediate nozzle described in Japanese Patent Application Laid-Open No. 62-282755 and having a nozzle body having a slit-shaped discharge port is used. ing. An electrode for energizing heating is mounted on the side surface outside the nozzle body in order to preheat uniformly. A refractory filter is built in the lower inside of the nozzle body for the purpose of rectification. Also, Japanese Patent Application Laid-Open
As described in Japanese Patent No. 124052, a start plate that is melted by a molten metal is provided above a refractory filter, and injection into a mold is suppressed until the molten metal is filled.
【０００３】表面性状に優れた鋳片を得るには、移動鋳
型内の溶湯表面、深さを安定化させなければならない。
それには、ストッパー、ＳＮプレートなどによるノズル
内への流量制御の応答性を高める必要があり、ノズル内
に溶湯を充満させることが不可欠である。[0003] In order to obtain a slab having excellent surface properties, the surface and depth of the molten metal in the moving mold must be stabilized.
For this purpose, it is necessary to increase the responsiveness of the flow rate control into the nozzle by the stopper, the SN plate, and the like, and it is indispensable to fill the nozzle with the molten metal.
【０００４】溶湯の充満方法として、特開平１−１１０
５５号公報に記されているノズル内耐火物製フィルター
の下方側壁に脱気孔を設け、真空装置に接続し、ノズル
内を減圧する方法がある。しかし、この方法では、大掛
かりな設備が必要となり、設備費、メンテナンスの負荷
が高く、またハンドリングが面倒である。また、下方側
壁に脱気孔を設けた場合、ノズル内のスタート板より上
部に存在する空気の抜け道がないため、溶湯の充満は不
可能であるとともに、一般に、ノズルを浸漬して鋳造す
るので、脱気孔と真空装置を結ぶパイプの耐熱性の点で
実現化は低い。As a method for filling a molten metal, Japanese Patent Laid-Open Publication No.
No. 55 discloses a method in which a deaeration hole is provided in a lower side wall of a refractory filter in a nozzle, connected to a vacuum device, and the pressure in the nozzle is reduced. However, this method requires large-scale equipment, increases equipment cost and maintenance load, and is cumbersome to handle. In addition, when a deaeration hole is provided in the lower side wall, since there is no escape path for air existing above the start plate in the nozzle, it is impossible to fill the molten metal, and in general, the nozzle is immersed and cast, The realization is low in terms of heat resistance of the pipe connecting the deaeration hole and the vacuum device.
【０００５】[0005]
【発明が解決しようとする課題】本発明の目的は、表面
性状に優れた鋳片を得るために、鋳造スタート直後にノ
ズル内に溶湯が容易に充満し、鋳造中も常時溶湯が充満
する注入ノズル構造を得ることにある。SUMMARY OF THE INVENTION It is an object of the present invention to provide a casting in which the molten metal is easily filled in the nozzle immediately after the start of casting and is always filled during casting in order to obtain a slab having excellent surface properties. It is to obtain a nozzle structure.
【０００６】[0006]
【課題を解決するための手段】本発明は、タンディシュ
から移動鋳型内に溶湯を注入する広幅薄肉鋳片の連続鋳
造用ノズルにおいて、スリット状の吐出口を有するノズ
ル本体と該ノズル本体内に溶湯を供給する中間ノズルと
で構成するとともに、ノズル本体上部に脱気孔を設け、
そこに釘状または針金状の金属製冷却材を詰めることを
特徴とする広幅薄肉鋳片の連続鋳造用注入ノズルを要旨
とする。SUMMARY OF THE INVENTION The present invention relates to a nozzle for continuous casting of a wide and thin cast slab for injecting a molten metal from a tundish into a moving mold, a nozzle body having a slit-shaped discharge port, and a molten metal in the nozzle body. And an intermediate nozzle for supplying air, and a deaeration hole is provided at the top of the nozzle body.
The gist of the present invention is an injection nozzle for continuous casting of wide and thin cast slabs, which is filled with a nail-shaped or wire-shaped metal coolant.
【０００７】[0007]
【作用】移動鋳型内の溶湯表面、深さを安定化させ、表
面性状に優れた鋳片を得るには、タンディシュから移動
鋳型内に溶湯を注入するノズル内への流量制御につい
て、高い応答性が要求される。そのために、鋳造スター
ト直後にノズル内に溶湯が充満し、その後も鋳造中は常
時溶湯が充満していなければならない。[Function] To stabilize the surface and depth of the molten metal in the moving mold and obtain a slab with excellent surface properties, high responsiveness is achieved by controlling the flow rate from the tundish into the nozzle that injects the molten metal into the moving mold. Is required. For this reason, the nozzle must be filled with molten metal immediately after the start of casting, and thereafter the molten metal must be constantly filled during casting.
【０００８】本発明は、ノズル本体内部の最上部に１ケ
所、脱気孔を設け、そこに冷却材を詰めることによっ
て、鋳造スタート直後に脱気孔高さまで溶湯が達した
後、溶湯と冷却材と混じり合い、脱気孔が自然閉塞し、
容易にノズル内に充満できることに着目して生まれたも
のである。According to the present invention, one deaeration hole is provided at the uppermost portion inside the nozzle body, and a coolant is filled in the deaeration hole. After the molten metal reaches the height of the deaeration hole immediately after the start of casting, the molten metal and the coolant are removed. Mixing, the deaeration pores are naturally blocked,
It was created by focusing on the fact that the nozzle can be filled easily.
【０００９】脱気孔の設置箇所は、完全にノズル内の空
気を逃がすために、ノズル本体内部の最上部、幅方向の
中央部が適切である。脱気孔の数は１ケ所で十分であ
る。脱気孔の大きさは、詰め込む冷却材の量、ビットの
径など加工上の制限によって決まる。冷却材の材質は、
溶湯の融点によって金属材料から選定し、冷却材の形状
はノズル本体に詰め込む際のハンドリングの点で、釘状
または針金状を選ぶことが好ましい。In order to completely release the air inside the nozzle, it is appropriate to set the deaeration hole at the uppermost portion inside the nozzle body and at the center in the width direction. One deaeration hole is sufficient. The size of the vent hole is determined by processing restrictions such as the amount of coolant to be packed and the diameter of the bit. The coolant material is
It is selected from metal materials according to the melting point of the molten metal, and the shape of the coolant is nail-shaped in terms of handling when packing into the nozzle body.
Alternatively , it is preferable to select a wire shape .
【００１０】[0010]
【実施例】以下に図を用いて本発明を詳細に説明する。
図面は本発明の実施例を示したもので、図１は注入ノズ
ルの構成図、図２はノズル本体内部の最上部に設置した
脱気孔部の詳細図である。図１において、注入ノズル
は、スリット状の吐出口を有するノズル本体とノズル本
体内に組み込み、溶湯を供給する中間ノズルにて構成し
ており、１はノズル本体、２は中間ノズル、３はモルタ
ル、４はノズル吐出口、５は耐火物製フィルター、６は
スタート板、７はノズル本体の内部空間、８は電極、９
は導電性の板、１０はノズル本体１の最上部に設けた脱
気孔、１１は該脱気孔１０内に充填した冷却材である。
図２において、脱気孔１０は例えば６mmのビットでノズ
ル本体に貫通させて形成され、冷却材１１として脱気孔
１０に詰め込んだ普通炭素鋼の針金を示している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings.
The drawings show an embodiment of the present invention. FIG. 1 is a configuration diagram of an injection nozzle, and FIG. 2 is a detailed view of a deaeration hole portion installed at an uppermost portion inside a nozzle body. In FIG. 1, the injection nozzle is composed of a nozzle main body having a slit-shaped discharge port and an intermediate nozzle incorporated in the nozzle main body to supply the molten metal, 1 is the nozzle main body, 2 is the intermediate nozzle, and 3 is mortar. 4 is a nozzle outlet, 5 is a refractory filter, 6 is a start plate, 7 is an internal space of the nozzle body, 8 is an electrode, 9
Is a conductive plate, 10 is a deaeration hole provided at the top of the nozzle body 1, and 11 is a coolant filled in the deaeration hole 10.
In FIG. 2, a deaeration hole 10 is formed by penetrating a nozzle body with a bit of, for example, 6 mm, and a wire made of ordinary carbon steel packed in the deaeration hole 10 as a coolant 11 is shown.
【００１１】本発明者は、脱気孔を設けた前記の注入ノ
ズルを用いて、双ロール法により、ＳＵＳ３０４材質の
広幅薄肉鋳片の連続鋳造を実施した。その結果、鋳造ス
タート直後から、ノズル本体幅方向からの溶湯の供給が
均一であり、また定常状態もストッパー開度の応答性が
高く、一対の水冷ロール間に存在する溶湯表面、深さが
安定化され、表面性状に優れた鋳片を得ることができ
た。鋳造後、使用したノズル本体を調査したところ、ノ
ズル内部に溶湯が完全に充満していた形跡が見られ、ま
た、脱気孔には溶湯のＳＵＳ３０４と針金状の冷却材の
普通炭素鋼が混じり合って固化し、脱気孔を自然閉塞し
ていた。これにより、容易にノズル内に溶湯を充満し、
高感度のノズル内への流量制御ができることが確認され
た。尚、本発明は、実施例に記載した鋳造方法、鋳片材
質、脱気孔の径および冷却材材質の組み合わせに限定さ
れるものではない。The inventor of the present invention carried out continuous casting of a wide and thin cast SUS304 material by a twin roll method using the above-described injection nozzle provided with a deaeration hole. As a result, the supply of molten metal from the nozzle body width direction is uniform immediately after the start of casting, and the responsiveness of the stopper opening is high even in the steady state, and the molten metal surface and depth existing between the pair of water-cooled rolls are stable. And a cast slab excellent in surface properties could be obtained. Examination of the nozzle body used after casting revealed that the nozzle was completely filled with molten metal, and that SUS304 of molten metal and ordinary carbon steel of wire-like coolant were mixed in the deaeration holes. And solidified, and the deaeration was naturally closed. This makes it easy to fill the nozzle with molten metal,
It has been confirmed that the flow rate into the nozzle with high sensitivity can be controlled. The present invention is not limited to the casting method, the slab material, the diameter of the deaeration hole and the coolant material described in the examples.
【００１２】[0012]
【発明の効果】以上説明した本発明に係る注入ノズルを
適用することにより、移動鋳型内の溶湯表面、深さが安
定化することによって、表面性状に優れた鋳片の製造が
可能になった。By applying the above-described injection nozzle according to the present invention, the surface and depth of the molten metal in the moving mold can be stabilized, so that a slab with excellent surface properties can be manufactured. .
【図１】注入ノズルの構成図である。FIG. 1 is a configuration diagram of an injection nozzle.
【図２】ノズル本体最上部に設置した脱気孔部の詳細図
である。FIG. 2 is a detailed view of a deaeration hole installed at the top of a nozzle body.
１ ノズル本体 ２ 中間ノズル ３ モルタル ４ ノズル吐出口 ５ 耐火物製のフィルター ６ スタート板 ７ ノズル本体の内部空間 ８ 電極 ９ 導電性の板 １０ 脱気孔 １１ 冷却材 DESCRIPTION OF SYMBOLS 1 Nozzle main body 2 Intermediate nozzle 3 Mortar 4 Nozzle discharge port 5 Filter made of refractory material 6 Start plate 7 Internal space of nozzle main body 8 Electrode 9 Conductive plate 10 Deaeration hole 11 Coolant
───────────────────────────────────────────────────── フロントページの続き (72)発明者 水地 功 山口県光市大字島田3434番地 新日本製 鐵株式会社 光製鐵所内 (56)参考文献 特開 昭63−183753（ＪＰ，Ａ) 特開 昭63−203254（ＪＰ，Ａ) ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Isao Mizuchi 3434 Shimada, Hikari-shi, Yamaguchi Prefecture Inside Nippon Steel Corporation Hikari Works (56) References 1988-203254 (JP, A)
Claims (1)
入する広幅薄肉鋳片の連続鋳造用ノズルにおいて、スリ
ット状の吐出口を有するノズル本体と該ノズル本体内に
溶湯を供給する中間ノズルとで構成するとともに、ノズ
ル本体上部に脱気孔を設け、そこに釘状または針金状の
金属製冷却材を詰めることを特徴とする広幅薄肉鋳片の
連続鋳造用注入ノズル。1. A continuous casting nozzle for a wide and thin cast slab for injecting molten metal from a tundish into a moving mold, comprising a nozzle body having a slit-shaped discharge port and an intermediate nozzle for supplying molten metal into the nozzle body. And a deaeration hole at the top of the nozzle body, where a nail or wire
An injection nozzle for continuous casting of wide thin cast slabs, characterized by packing with metal coolant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22707492A JP2633776B2 (en) | 1992-08-26 | 1992-08-26 | Injection nozzle for continuous casting of wide thin cast slabs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22707492A JP2633776B2 (en) | 1992-08-26 | 1992-08-26 | Injection nozzle for continuous casting of wide thin cast slabs |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06126395A JPH06126395A (en) | 1994-05-10 |
| JP2633776B2 true JP2633776B2 (en) | 1997-07-23 |
Family
ID=16855117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22707492A Expired - Fee Related JP2633776B2 (en) | 1992-08-26 | 1992-08-26 | Injection nozzle for continuous casting of wide thin cast slabs |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2633776B2 (en) |
-
1992
- 1992-08-26 JP JP22707492A patent/JP2633776B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06126395A (en) | 1994-05-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19970212 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
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| LAPS | Cancellation because of no payment of annual fees |