JPH0133257Y2 - - Google Patents
Info
- Publication number
- JPH0133257Y2 JPH0133257Y2 JP1984048971U JP4897184U JPH0133257Y2 JP H0133257 Y2 JPH0133257 Y2 JP H0133257Y2 JP 1984048971 U JP1984048971 U JP 1984048971U JP 4897184 U JP4897184 U JP 4897184U JP H0133257 Y2 JPH0133257 Y2 JP H0133257Y2
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- tundish
- inner hole
- upper nozzle
- inert gas
- 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
Links
Landscapes
- Continuous Casting (AREA)
Description
本考案は溶鋼を鋳造する際にタンデイツシユ内
で使用されるタンデイツシユ上部ノズルに関する
ものである。
従来からタンデイツシユ上部ノズルの材質とし
ては一般的にはHi−Al2O3質が使用されている
が、Al−Killed鋼の鋳造に際して非金属介在物で
あるAl2O3クラスターがノズル内孔表面に付着
し、ノズル閉塞を発生し易い欠点を有していた。
タンデイツシユ上部ノズル材質がたとえ他の材質
であつても多連続鋳造、例えば親鍋４杯分以上鋳
込むような場合には親鍋交換前の溶鋼温度の低下
もAl2O3付着現象を助長する一因となり、徐々に
Al2O3の付着が進行し、最終的にはノズル閉塞が
発生して鋳造不可能になつてしまうケースが度々
発生し、多大な損害を被り、改善を追られてい
た。本考案は上記欠点を改良し、タンデイツシユ
ノズルの内孔表面にアルミナの付着するのを防止
し、ノズル閉塞を発生しないタンデイツシユノズ
ルを提供し、Al−Killed鋼の鋳造に際しても親鍋
４杯分以上の多連続鋳造を可能にするものであ
る。即ちノズル閉塞を発生しないタンデイツシユ
上部ノズルの開発を目的とするものである。
以下本考案を図面実施例について詳細に述べ
る。先ず本考案の主旨はタンデイツシユ上部ノズ
ルの内孔表面に付着しようとするAl2O3をタンデ
イツシユ上部ノズルの内孔表面まで貫通する細孔
を通してAr或いはN2等の不活性ガスを吹き込む
ことによつて吹き飛ばし、Al2O3付着によるノズ
ル閉塞防止をせんとするものである。図面第１，
２図において、２はタンデイツシユ上部ノズル１
の内部に同心円筒的に設けられた空隙周室で、該
空隙周室２から内方に向かつて下向き、かつノズ
ル内孔１ａに対し接線方向に多数の貫通細孔３が
夫々先端がノズル内孔１ａ表面に開口するように
繞設されている。なお４は不活性ガスを外部から
ヘツダーである空隙周室２内に吹込むための吹込
み用パイプである。即ち本考案は、タンデイツシ
ユ上部ノズル１内に設けられたノズル内孔１ａ表
面まで貫通する貫通細孔３の構成を、下向き、か
つタンデイツシユ上部ノズル１のノズル内孔１ａ
に対して接線方向または螺旋状にして多数配設し
たことを特徴とするものである。
本考案は叙上の構成で、貫通細孔３を下向きに
することにより溶鋼の流れに沿つて不活性ガスを
吹き込むことができるため、Al2O3等の非金属介
在物を溶鋼とともに洗い流し易くすことができ
る。また貫通細孔３をノズル内孔１ａに対し接線
方向または螺旋状にすることにより、ノズル内孔
１ａ表面円周に沿つて不活性ガスを吹き込むこと
ができるために、効果的に不活性ガスがタンデイ
ツシユノズル内孔１ａ表面を洗浄することが可能
となり、延いてはAl2O3の付着現象を効果的に防
止でき、ノズル閉塞を発生することなく、多連続
鋳造が可能となる特徴を有するものである。なお
該貫通細孔３の下向き角度については水平に対し
下向きであれば良いが製造上の観点から０〜45゜
の範囲で下向きが良い。螺旋状についてはできる
限り一つ一つの貫通細孔３が円周に対し接線方向
に配設された方がよい。
何故ならば吹き込まれた不活性ガスがノズル内
孔１ａ表面に沿つて吹き込まれるからである。
次に本考案に係かる実施例について示す。
本考案による螺旋型貫通細孔をノズル内孔表面
まで配設したタンデイツシユ上部ノズルと従来か
ら使用されているアルミナ質のタンデイツシユを
実用に供した結果を次に示す。
The present invention relates to a tundish upper nozzle used in a tundish when casting molten steel. Conventionally, Hi-Al 2 O 3 has been generally used as the material for the upper nozzle of the tundish, but when Al-Killed steel is cast, Al 2 O 3 clusters, which are non-metallic inclusions, form on the inner hole surface of the nozzle. This has the disadvantage that it tends to adhere to the surface of the substrate and cause nozzle clogging.
Even if the upper nozzle material of the tundish is made of another material, in the case of multiple continuous casting, for example, when pouring more than 4 cups of the master ladle, a drop in the temperature of the molten steel before replacing the master ladle will also promote the Al 2 O 3 adhesion phenomenon. contributing to and gradually
As the adhesion of Al 2 O 3 progresses, cases often occur where the nozzle eventually becomes clogged and casting becomes impossible, causing great damage and requiring improvements to be made. The present invention improves the above-mentioned drawbacks, prevents alumina from adhering to the inner hole surface of the tundish nozzle, provides a tundish nozzle that does not cause nozzle clogging, and provides a tundish nozzle that can be used even when casting Al-Killed steel. This enables continuous casting of four or more cups. That is, the object is to develop a tundish upper nozzle that does not cause nozzle blockage. The present invention will be described in detail below with reference to drawing examples. First, the gist of the present invention is to remove Al 2 O 3 that is about to adhere to the inner hole surface of the tundish upper nozzle by blowing an inert gas such as Ar or N 2 through the pores that penetrate to the inner hole surface of the tundish upper nozzle. The purpose is to prevent nozzle clogging due to Al 2 O 3 adhesion. Drawing 1st,
In Figure 2, 2 is the tundish upper nozzle 1.
A plurality of through holes 3 are formed inwardly and downwardly from the gap surrounding chamber 2, and in a tangential direction to the nozzle inner hole 1a. It is provided so as to open on the surface of the hole 1a. Note that 4 is a blowing pipe for blowing inert gas from the outside into the gap surrounding chamber 2 which is a header. That is, in the present invention, the structure of the through-hole 3 that penetrates to the surface of the nozzle inner hole 1a provided in the tundish upper nozzle 1 is directed downward and toward the nozzle inner hole 1a of the tundish upper nozzle 1.
It is characterized in that a large number of them are arranged in a tangential direction or in a spiral shape. The present invention has the above-mentioned configuration, and by directing the through-holes 3 downward, inert gas can be blown along the flow of molten steel, making it easier to wash away non-metallic inclusions such as Al 2 O 3 along with the molten steel. Can be smoked. Furthermore, by making the through-hole 3 tangential or spiral with respect to the nozzle inner hole 1a, inert gas can be blown along the surface circumference of the nozzle inner hole 1a, so that the inert gas can be effectively injected. It is possible to clean the surface of the inner hole 1a of the tundish nozzle, which in turn effectively prevents the adhesion of Al 2 O 3 , and enables multi-continuous casting without clogging the nozzle. It is something that you have. The downward angle of the through-hole 3 may be downward with respect to the horizontal, but from the viewpoint of manufacturing, it is preferably downward in the range of 0 to 45 degrees. In the case of a spiral shape, it is preferable that each through hole 3 is arranged in a tangential direction to the circumference as much as possible. This is because the blown inert gas is blown along the surface of the nozzle inner hole 1a. Next, embodiments according to the present invention will be described. The results of practical use of the tundish upper nozzle in which the spiral-shaped through-pores of the present invention are arranged up to the nozzle inner hole surface and the conventionally used alumina tundish are shown below.
【表】
上記の如く、従来型のタンデイツシユノズルに
比較し、２倍以上の多連続鋳造が可能となり多大
な効果があつた。[Table] As mentioned above, compared to the conventional tundish nozzle, it was possible to perform multiple continuous castings more than twice as many times, and it had a great effect.
図面は本考案タンデイツシユ上部ノズルの実施
例を示すもので、第１図は縦断正面図、第２図は
横断平面図である。
１……タンデイツシユ上部ノズル、１ａ……ノ
ズル内孔、２……空隙周室、……貫通細孔、４…
…吹込み用パイプ。
The drawings show an embodiment of the tundish upper nozzle of the present invention, with FIG. 1 being a longitudinal sectional front view and FIG. 2 being a lateral plan view. DESCRIPTION OF SYMBOLS 1... Tundishu upper nozzle, 1a... Nozzle inner hole, 2... Gap surrounding chamber,... Penetration pore, 4...
...Blowing pipe.
Claims (1)
して不活性ガスを吹込むためのタンデイツシユノ
ズル内孔表面まで貫通する細孔を、夫々下向きか
つノズル内孔に対し接線方向または螺旋状に多数
配設したことを特徴とするタンデイツシユ上部ノ
ズル。 As a measure to prevent clogging of the upper nozzle of the tundish, a large number of pores are provided that penetrate to the surface of the tundish nozzle inner hole for blowing inert gas, each facing downward and tangentially or spirally to the nozzle inner hole. The upper nozzle of the tundish tray.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4897184U JPS60160964U (en) | 1984-04-03 | 1984-04-03 | Tundateishu upper nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4897184U JPS60160964U (en) | 1984-04-03 | 1984-04-03 | Tundateishu upper nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60160964U JPS60160964U (en) | 1985-10-25 |
| JPH0133257Y2 true JPH0133257Y2 (en) | 1989-10-09 |
Family
ID=30565727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4897184U Granted JPS60160964U (en) | 1984-04-03 | 1984-04-03 | Tundateishu upper nozzle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60160964U (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5720057B2 (en) * | 1973-07-04 | 1982-04-26 | ||
| JPS5934857U (en) * | 1982-08-30 | 1984-03-03 | 株式会社クボタ | Inert gas seal jig for casting molten metal flow |
-
1984
- 1984-04-03 JP JP4897184U patent/JPS60160964U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60160964U (en) | 1985-10-25 |
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