JPH024755Y2 - - Google Patents
Info
- Publication number
- JPH024755Y2 JPH024755Y2 JP1984191948U JP19194884U JPH024755Y2 JP H024755 Y2 JPH024755 Y2 JP H024755Y2 JP 1984191948 U JP1984191948 U JP 1984191948U JP 19194884 U JP19194884 U JP 19194884U JP H024755 Y2 JPH024755 Y2 JP H024755Y2
- Authority
- JP
- Japan
- Prior art keywords
- shroud
- tundish
- molten steel
- ladle
- 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
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 40
- 239000010959 steel Substances 0.000 claims description 40
- 239000002184 metal Substances 0.000 claims description 18
- 229910052751 metal Inorganic materials 0.000 claims description 18
- 238000002844 melting Methods 0.000 claims description 13
- 230000008018 melting Effects 0.000 claims description 13
- 238000007654 immersion Methods 0.000 claims description 8
- 238000009749 continuous casting Methods 0.000 claims description 4
- 150000002739 metals Chemical class 0.000 description 6
- 238000003756 stirring Methods 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910001021 Ferroalloy Inorganic materials 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、溶融金属の連続鋳造において、タン
デイツシユに低融点金属を歩留良く添加するため
の連続鋳造用タンデイツシユに関するものであ
る。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a continuous casting tundish for adding a low melting point metal to the tundish with good yield in continuous casting of molten metal.
（従来の技術）
一般に、低融点金属、合金鉄等を溶融金属に添
加する方法としては、転炉からの出鋼流への添加
あるいは取鍋内への添加が主流であるが、一部特
開昭54−31013号公報や特開昭54−31035号公報に
みられるように、取鍋からタンデイツシユへ落下
する溶鋼流の全長にわたつて囲いを設けると共に
その先端に注入管を取付け、囲いの長さ方向中間
部分からカルシウム金属などを入れ、タンデイツ
シユ内浴面に添加するものがある。又、特公報54
−36574号公報には、取鍋からの溶鋼落下位置に、
溶鋼落下流を囲み、かつ下部がタンデイツシユ内
溶鋼に浸漬する堰を設け、該浸漬堰内に溶鋼清浄
剤を添加投入するものが提案されている。(Prior art) Generally, the mainstream method for adding low melting point metals, ferroalloys, etc. to molten metal is to add them to the tapped steel stream from a converter or into a ladle, but there are some special As seen in Japanese Patent Application Laid-open No. 54-31013 and Japanese Patent Application Laid-open No. 54-31035, an enclosure is provided along the entire length of the molten steel flowing from the ladle to the tundish, and an injection pipe is attached to the tip of the enclosure. Some types add calcium metal or the like to the inner bath surface of the tundish. Also, Special Publication 54
-36574 publication states that at the position where molten steel falls from the ladle,
It has been proposed to provide a weir surrounding the falling flow of molten steel and whose lower part is immersed in the molten steel in the tundish, and to add and inject a molten steel purifier into the immersion weir.
（考案が解決しようとする問題点）
しかし前記従来の方法は夫々以下に記す難点を
有する。(Problems to be Solved by the Invention) However, each of the above conventional methods has the following drawbacks.
即ち低融点金属、例えばPbを転炉からの出鋼
流や取鍋内に添加する場合、Pb添加時及び取鍋
排滓処理に伴なうPbヒユームに対する環境上の
対策が必須で、膨大な設備費を必要とする。 In other words, when adding low melting point metals, such as Pb, to the tapped steel stream from the converter or into the ladle, it is essential to take environmental measures against Pb fumes during the addition of Pb and when processing the ladle waste. Requires equipment costs.
又、特開昭54−31013号公報、特開昭54−31035
号公報に示される方法では、溶鋼流の囲い及びそ
の先端に設けられた注入管は外気との遮断が目的
であり、従つてその径は小さい方が有利である。
その為取鍋からの溶鋼流がタンデイツシユ浴面に
衝突した時の溶鋼撹拌が不十分で、添加金属の十
分な混合が望めない。 Also, JP-A-54-31013, JP-A-54-31035
In the method disclosed in the publication, the purpose of the molten steel flow enclosure and the injection pipe provided at its tip is to isolate it from the outside air, and therefore it is advantageous for the diameter thereof to be small.
Therefore, when the molten steel flow from the ladle collides with the tundish bath surface, stirring of the molten steel is insufficient, and sufficient mixing of the added metal cannot be expected.
特公昭54−36574号公報に示される溶鋼落下流
を囲む浸漬堰については、金属、金属酸化物を添
加する際の撹拌、懸濁を目的とするものの、浸漬
堰の大きさについては触れられておらず、最適範
囲が不明である。 Regarding the immersion weir surrounding the falling flow of molten steel shown in Japanese Patent Publication No. 54-36574, the purpose is to stir and suspend when adding metals and metal oxides, but the size of the immersion weir is not mentioned. The optimal range is unknown.
（問題点を解決するための手段）
本考案は前記問題点に鑑み、低融金属をタンデ
イツシユに添加する際に、取鍋ノズルの周囲にシ
ユラウドを設置し、その下部はタンデイツシユ内
溶鋼に浸漬させ、かつシユラウドの大きさを適正
範囲に規定したものである。(Means for Solving the Problems) In view of the above-mentioned problems, the present invention has been proposed by installing a shroud around the ladle nozzle when adding a low melting metal to the tundish, and the lower part of the shroud is immersed in the molten steel in the tundish. , and the size of the shroud is defined within an appropriate range.
すなわち、本考案の要旨は、低融点金属をタン
デイツシユ内溶鋼に添加しつつ連続鋳造を行なう
ためのシユラウド付タンデイツシユにおいて、当
該タンデイツシユに取鍋から溶鋼をタンデイツシ
ユに排出する取鍋ノズル周囲を囲むごとくシユラ
ウドを設け、該シユラウドの下端をタンデイツシ
ユ内溶鋼に浸漬させると共に、シユラウドの幅を
Ａ、長さをＢ、溶鋼への浸漬深さをＣ、取鍋ノズ
ル径をｄ、取鍋ノズルのスライド距離をｌ、溶鋼
深さをｈとしたとき、Ａ＝（３〜６）ｄ、Ｂ＝ｌ
＋100、Ｃ＝（0.5〜0.8）ｈとしたことを特徴とす
るシユラウド付タンデイツシユである。 That is, the gist of the present invention is that, in a tundish with a shroud for performing continuous casting while adding a low melting point metal to molten steel in the tundish, a shroud is provided in the tundish so as to surround a ladle nozzle that discharges molten steel from the ladle into the tundish. The lower end of the shroud is immersed in the molten steel in the tundish, and the width of the shroud is A, the length is B, the immersion depth in the molten steel is C, the ladle nozzle diameter is d, and the sliding distance of the ladle nozzle is l, when the molten steel depth is h, A=(3~6)d, B=l
+100, C=(0.5 to 0.8) h.
以下に本考案を図により説明する。 The present invention will be explained below using figures.
第１図は本考案に係るタンデイツシユの正面の
断面図であり、第２図は上面の断面図である。第
３図は本考案に係る他のタンデイツシユ例を示す
上面の断面図である。 FIG. 1 is a front sectional view of the tundish according to the present invention, and FIG. 2 is a top sectional view. FIG. 3 is a top sectional view showing another example of a tundish according to the present invention.
取鍋１の下部に設けた取鍋ノズル４の下部を囲
むように、タンデイツシユ２のタンデイツシユカ
バー３にシユラウド７を設ける。 A shroud 7 is provided on the tundish cover 3 of the tundish 2 so as to surround the lower part of the ladle nozzle 4 provided at the lower part of the ladle 1.
シユラウド７の上端はタンデイツシユカバー３
の高さとし、取鍋ノズルとシユラウド７の間隙に
低融点金属を添加するよう合金添加パイプ５の先
端をのぞませる。シユラウド７の下端はタンデイ
ツシユ内溶鋼に浸漬させ、シユラウド７の平面に
おける断面形状については第２図に示すごとく取
鍋ノズル４−１，４−２を囲むよう長方形とす
る。尚、第２図、第３図において取鍋ノズル４−
１，４−２はスライデイングノズルの場合の移動
前と移動後の位置を表わす。ストツパーノズルの
場合は＝０となる。 The upper end of the shroud 7 is the tandate shroud cover 3.
The tip of the alloy addition pipe 5 is made to look into the gap between the ladle nozzle and the shroud 7 to add the low melting point metal. The lower end of the shroud 7 is immersed in the molten steel in the tundish, and the cross-sectional shape of the shroud 7 in a plane is rectangular so as to surround the ladle nozzles 4-1 and 4-2 as shown in FIG. In addition, in FIGS. 2 and 3, the ladle nozzle 4-
1 and 4-2 represent the positions before and after movement in the case of a sliding nozzle. In the case of a stopper nozzle, it becomes =0.
このような形状のシユラウドにおいてその最適
形状は次の通りである。シユラウドの幅をＡ
（mm）、長さをＢ（mm）、タンデイツシユ溶鋼中への
浸漬深さをＣ（mm）、取鍋ノズルの外径をｄ（mm）、
取鍋ノズルのスライド距離（mm）、溶鋼深さを
ｈ（mm）とすると、
Ａ＝（３〜６）ｄ、
Ｂ＝＋100mm、
Ｃ＝（0.5〜0.8）ｈ、
の範囲が良い。 The optimal shape of a shroud having such a shape is as follows. The width of the shroud is A
(mm), the length is B (mm), the immersion depth in the tundish molten steel is C (mm), the outer diameter of the ladle nozzle is d (mm),
If the sliding distance of the ladle nozzle (mm) and the molten steel depth are h (mm), then the following ranges are suitable: A=(3-6)d, B=+100mm, C=(0.5-0.8)h.
前記条件を満足しない場合、例えばシユラウド
の幅Ａが取鍋ノズルの径ｄの３倍未満のときは、
取鍋ノズルからの流入溶鋼がシユラウド内壁に飛
散し、地金付着が大くなり、低融点金属の添加が
不能となる。又、シユラウドの幅Ａが取鍋ノズル
ｄの６倍を超えると、シユラウド内の溶鋼の撹拌
が著しく低下し、低融点金属の撹拌混合が望めな
い。シユラウドの長さＢについても同様のことが
言える。更にシユラウドの浸漬深さＣについて
は、溶鋼深さｈの0.5倍未満では撹拌流動された
溶鋼が短時間でシユラウド外に拡散してしまい、
低融点金属の混合が十分でなくなる。浸漬深さＣ
が溶鋼深さｈの0.8倍を超えると、添加され、撹
拌混合された低融点金属が長時間シユラウド内に
溜まり、必要なタンデイツシユ内への拡散が妨げ
られる。 If the above conditions are not satisfied, for example, if the width A of the shroud is less than three times the diameter d of the ladle nozzle,
The inflowing molten steel from the ladle nozzle scatters on the inner wall of the shroud, increasing base metal adhesion and making it impossible to add low melting point metals. Furthermore, if the width A of the shroud exceeds six times the width of the ladle nozzle d, the stirring of the molten steel within the shroud will be significantly reduced, and stirring and mixing of low melting point metals cannot be expected. The same can be said about the length B of the shroud. Furthermore, regarding the immersion depth C of the shroud, if it is less than 0.5 times the molten steel depth h, the stirred and fluidized molten steel will diffuse outside the shroud in a short period of time.
Mixing of low melting point metals becomes insufficient. Immersion depth C
If it exceeds 0.8 times the molten steel depth h, the added, stirred and mixed low melting point metal will remain in the shroud for a long time, preventing the necessary diffusion into the tundish.
尚、図中６は溶鋼面、８は鋳型へ溶鋼を供給す
る鋳込ノズルである。 In the figure, 6 is a molten steel surface, and 8 is a casting nozzle that supplies molten steel to the mold.
（作用）
本考案はこのように構成してあるので、取鍋１
内の溶鋼を取鍋ノズル４を介してタンデイツシユ
２内に流入させるとき、取鍋ノズルからの溶鋼流
がシユラウド７の内部で激しく撹拌され、その中
に低融点金属を添加することにより、流動撹拌中
の溶鋼に混合分散し、その後シユラウド７の下部
から溶鋼がタンデイツシユ７の左右領域に拡散す
る。(Function) Since the present invention is constructed as described above, the ladle 1
When the molten steel flows into the tundish 2 through the ladle nozzle 4, the molten steel flow from the ladle nozzle is vigorously stirred inside the shroud 7, and by adding a low melting point metal therein, fluid agitation is achieved. The molten steel is mixed and dispersed in the molten steel inside, and then the molten steel is diffused from the lower part of the shroud 7 to the left and right regions of the tundish 7.
（考案の効果）
このように、本考案によれば低融点金属タンデ
イツシユ溶鋼に歩留り良く、確実に分散混合する
ことが可能となる。(Effects of the invention) As described above, according to the invention, it is possible to reliably disperse and mix low melting point metal tandem molten steel with good yield.
第４図に、Pbをタンデイツシユ溶鋼に添加し
た場合の、本考案に係るシユラウド付タンデイツ
シユを使用したときと本考案外のシユラウド付タ
ンデイツシユ使用のときのPb歩留を比較して表
わした。本考案外のシユラウド付タンデイツシユ
使用のときに比べ本考案に係るシユラウド付タン
デイツシユを用いることにより約20％の歩留り向
上がみられる。 FIG. 4 shows a comparison of the Pb yield when using a tundish with a shroud according to the present invention and when using a tundish with a shroud other than the present invention when Pb is added to tundish molten steel. By using the shroud-equipped tundish according to the present invention, the yield is improved by about 20% compared to when using a shroud-equipped tundish that is not of the present invention.
第１図は本考案に係るタンデイツシユ例の正面
の断面図、第２図は同タンデイツシユの上面の断
面図、第３図は本考案の他のタンデイツシユ例を
示す上面の断面図、第４図は本考案に係るタンデ
イツシユの鉛歩留向上効果例を示す図である。
１……取鍋、２……タンデイツシユ、３……タ
ンデイツシユカバー、４……取鍋ノズル、５……
合金添加パイプ、６……溶鋼面、７……シユラウ
ド、８……鋳込ノズル。
FIG. 1 is a front cross-sectional view of an example of a tundish according to the present invention, FIG. 2 is a cross-sectional view of the top of the same tundish, FIG. 3 is a cross-sectional view of the top showing another example of a tundish according to the present invention, and FIG. FIG. 3 is a diagram showing an example of the lead yield improvement effect of the tundish according to the present invention. 1...Ladle, 2...Tundai dish, 3...Tundai dish cover, 4...Ladle nozzle, 5...
Alloy addition pipe, 6... Molten steel surface, 7... Shroud, 8... Casting nozzle.
Claims (1)
つ連続鋳造を行なうためのシユラウド付タンデイ
ツシユにおいて、当該タンデイツシユに取鍋から
溶鋼をタンデイツシユに排出する取鍋ノズルの周
囲を囲むごとくシユラウドを設け、該シユラウド
の下端をタンデイツシユ内溶鋼に浸漬させると共
に、シユラウドの幅をＡ、長さをＢ、溶鋼への浸
漬深さをＣ、取鍋ノズル径をｄ、取鍋ノズルのス
ライド距離をｌ、溶鋼深さをｈとしたとき、Ａ＝
（３〜６）ｄ、Ｂ＝１＋100、Ｃ＝（0.5〜0.8）ｈ
としたことを特徴とするシユラウド付タンデイツ
シユ。 In a tundish with a shroud for performing continuous casting while adding a low melting point metal to molten steel in the tundish, a shroud is provided in the tundish to surround a ladle nozzle that discharges molten steel from the ladle into the tundish, and a shroud is provided at the lower end of the shroud. is immersed in the molten steel in the tundish, and the width of the shroud is A, the length is B, the immersion depth in the molten steel is C, the ladle nozzle diameter is d, the sliding distance of the ladle nozzle is l, and the molten steel depth is h. When, A=
(3~6)d, B=1+100, C=(0.5~0.8)h
A tandaishitsu with a shroud, which is characterized by:
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984191948U JPH024755Y2 (en) | 1984-12-18 | 1984-12-18 | |
| DE8585116118T DE3570194D1 (en) | 1984-12-18 | 1985-12-17 | Tundish for continuous casting of free cutting steel |
| EP85116118A EP0186852B2 (en) | 1984-12-18 | 1985-12-17 | Tundish for continuous casting of free cutting steel |
| ES85550062A ES8700589A1 (en) | 1984-12-18 | 1985-12-17 | Tundish for continuous casting of free cutting steel. |
| AU51439/85A AU559525B2 (en) | 1984-12-18 | 1985-12-18 | Tundish for continuous casting |
| ZA859665A ZA859665B (en) | 1984-12-18 | 1985-12-18 | Tundish for continuous casting of free cutting steel |
| ZA864521A ZA864521B (en) | 1984-12-18 | 1986-12-18 | Tundish for continuous casting of free cutting steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984191948U JPH024755Y2 (en) | 1984-12-18 | 1984-12-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61107454U JPS61107454U (en) | 1986-07-08 |
| JPH024755Y2 true JPH024755Y2 (en) | 1990-02-05 |
Family
ID=16283120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1984191948U Expired JPH024755Y2 (en) | 1984-12-18 | 1984-12-18 |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH024755Y2 (en) |
| ZA (1) | ZA859665B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5695452A (en) * | 1979-12-27 | 1981-08-01 | Nippon Steel Corp | Continuous casting method of dissimilar steel kind |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53102919U (en) * | 1977-01-24 | 1978-08-19 | ||
| JPS5691659U (en) * | 1979-12-15 | 1981-07-21 |
-
1984
- 1984-12-18 JP JP1984191948U patent/JPH024755Y2/ja not_active Expired
-
1985
- 1985-12-18 ZA ZA859665A patent/ZA859665B/en unknown
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5695452A (en) * | 1979-12-27 | 1981-08-01 | Nippon Steel Corp | Continuous casting method of dissimilar steel kind |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61107454U (en) | 1986-07-08 |
| ZA859665B (en) | 1987-08-26 |
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