JPH0117410Y2 - - Google Patents
Info
- Publication number
- JPH0117410Y2 JPH0117410Y2 JP1984197024U JP19702484U JPH0117410Y2 JP H0117410 Y2 JPH0117410 Y2 JP H0117410Y2 JP 1984197024 U JP1984197024 U JP 1984197024U JP 19702484 U JP19702484 U JP 19702484U JP H0117410 Y2 JPH0117410 Y2 JP H0117410Y2
- Authority
- JP
- Japan
- Prior art keywords
- weir
- tundish
- molten steel
- ladle nozzle
- distance
- 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)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案はPb，Bi含有鋼の製造時、未溶解の
Pb，Biがタンデイツシユから鋳型へ流出するの
を防止するタンデイツシユの構造に関するもので
ある。[Detailed explanation of the invention] (Field of industrial application) This invention is a method for producing unmelted Pb and Bi-containing steel.
This relates to the structure of the tundish that prevents Pb and Bi from flowing out from the tundish into the mold.
（従来の技術）
一般にPb，Biの含有鋼を製造する際、溶鋼中
にPb，Biを添加する方法として、転炉出鋼中の
溶鋼流に添加する方法や、取鍋内溶鋼に添加する
方法などがある。このような作業時、未溶解の
Pb，Biが取鍋底に沈降、堆積して、次の工程で
あるタンデイツシユへの溶鋼注入時、沈降Pbや
Biが溶鋼とともにタンデイツシユへ硫出し、更
にタンデイツシユから鋳型内に流入し、凝固後の
鋳片に不均一に分布したり巨大介在物として存在
するため、鋳片の品質上の問題が起る。(Conventional technology) Generally, when producing steel containing Pb and Bi, Pb and Bi are added to the molten steel by adding them to the molten steel flow being tapped in a converter, or adding them to the molten steel in a ladle. There are methods. During such operations, undissolved
Pb and Bi settle and accumulate on the bottom of the ladle, and when pouring molten steel into the tundish, which is the next process, the precipitated Pb and
Bi is sulfurized together with the molten steel into the tundish, and further flows into the mold from the tundish, and is unevenly distributed in the solidified slab or exists as giant inclusions, causing problems in the quality of the slab.
この問題に対処するため特公昭48−14524号に
示されるように取鍋底の溶鋼排出孔周囲を堰で囲
み、沈降したPb，Biを堰止めすることが提案さ
れている。 To deal with this problem, it has been proposed to surround the molten steel discharge hole at the bottom of the ladle with a weir to block the settled Pb and Bi, as shown in Japanese Patent Publication No. 14524/1983.
その他、実開昭54−35715号に示されるように
タンデイツシユの底面に堰を設けて、未溶解の添
加合金や非金属介在物が鋳型に流入するのを防ぐ
ことも試みられている。 In addition, as shown in Japanese Utility Model Application No. 54-35715, attempts have been made to provide a weir at the bottom of the tundish to prevent unmelted additive alloys and nonmetallic inclusions from flowing into the mold.
（考案が解決しようとする問題点）
しかし前記特公昭48−14524号に示される方法
は取鍋における溶鋼排出孔の周囲を囲むものでタ
ンデイツシユにおける堰とは異なる。(Problems to be Solved by the Invention) However, the method shown in Japanese Patent Publication No. 48-14524 involves surrounding the molten steel discharge hole in the ladle, which is different from the weir in the tundish.
又、前記実開昭54−35715号に示されるタンデ
イツシユは堰の設置位置を取鍋ノズルの高さや、
溶鋼を鋳型へ排出する排出孔の位置と関連づけて
記載されておらず、タンデイツシユ内の堰の最適
設置が不明である。従つて、後述のごとく、Pb，
Biなどの金属含有鋼の製造時、溶鋼中に添加し
た未溶解のPb，Biなどがタンデイツシユから鋳
型へ流出するのを防止できなかつた。 In addition, the tundish shown in the above-mentioned Utility Model Application Publication No. 54-35715 has different heights of the ladle nozzle and the installation position of the weir.
There is no description of the location of the discharge hole for discharging molten steel into the mold, and the optimal placement of the weir inside the tundish is unclear. Therefore, as described below, Pb,
When manufacturing steel containing metals such as Bi, it was not possible to prevent undissolved Pb, Bi, etc. added to molten steel from flowing out from the tundish into the mold.
（問題点を解決するための手段）
本考案は前記の課題解決を計つてなされたもの
で、タンデイツシユ底面に設けた堰の高さ、取鍋
ノズルからの距離を適正に規定するものである。(Means for Solving the Problems) The present invention has been made to solve the above-mentioned problems, and is to appropriately define the height of the weir provided on the bottom of the tundish and the distance from the ladle nozzle.
本考案においては更に、タンデイツシユ底面
で、取鍋ノズルに接近させた内堰と、タンデイツ
シユから鋳型に溶鋼を流出させる排出孔の近辺に
他の外堰を設けて２重の下堰とし、夫々の堰の高
さ、設定位置を適正に規定するものである。 In the present invention, an inner weir is provided on the bottom of the tundish, an inner weir close to the ladle nozzle, and another outer weir near the discharge hole through which molten steel flows from the tundish into the mold, creating a double lower weir. This is to appropriately specify the height and location of the weir.
即ち、本考案の要旨は、タンデイツシユ底面
で、取鍋ノズルと溶鋼排出孔の間に内堰と外堰の
２重の下堰を設け、その高さを溶鋼面より小と
し、その長さをタンデイツシユ巾と同等とし、か
つ以下の条件を満足させたことを特徴とする２重
下堰タンデイツシユ：
内堰、外堰の高さをＡ、取鍋ノズル中心と内堰
との距離をＢ、取鍋ノズル中心と外堰との距離を
Ｃ、取鍋ノズル下端とタンデイツシユ底面との距
離をＤ、溶鋼深さをＥ、取鍋ノズル中心と取鍋ノ
ズルに近い排出孔までの距離をＦとした時、
Ａ＝（0.2〜0.5）Ｅ、Ｂ＝（0.1〜0.3）Ｆ、
Ｃ＝（0.4〜0.6）Ｆ、Ｄ＝（0.7〜1.0）Ａ、
とするものである。 That is, the gist of the present invention is to provide a double lower weir, an inner weir and an outer weir, between the ladle nozzle and the molten steel discharge hole on the bottom of the tundish, and to make the height of the lower weir smaller than the molten steel surface and its length. A double lower weir tundish which is equal in width to the tundish width and satisfies the following conditions: The height of the inner and outer weirs is A, the distance between the center of the ladle nozzle and the inner weir is B, and the height of the inner and outer weirs is B. The distance between the center of the ladle nozzle and the outer weir is C, the distance between the lower end of the ladle nozzle and the bottom of the tundish is D, the molten steel depth is E, and the distance between the center of the ladle nozzle and the discharge hole near the ladle nozzle is F. When, A=(0.2-0.5)E, B=(0.1-0.3)F, C=(0.4-0.6)F, D=(0.7-1.0)A.
（考案の作用）
本考案はこのように構成されているので取鍋ノ
ズルの溶鋼流は内堰内で一時溜まり、次にオーバ
ーフローし、外堰内で再び一時滞溜し、その後排
出口から鋳型に供給される。この時未溶融のPb，
Biは内堰、外堰によつて堰止められ排出口には
流出しない。(Operation of the invention) Since the invention is constructed in this way, the molten steel flow from the ladle nozzle temporarily accumulates in the inner weir, then overflows, temporarily accumulates again in the outer weir, and then flows out from the discharge port into the mold. is supplied to At this time, unmelted Pb,
Bi is blocked by the inner and outer weirs and does not flow out to the outlet.
（実施例 １）
次に図面により本考案装置の数例とその操作方
法を設明する。(Example 1) Next, several examples of the device of the present invention and its operating method will be explained with reference to the drawings.
第１図は本考案タンデイツシユの実施例の正面
の断面図、第２図は第１図のＡ−Ａ矢示断面図、
第３図は本考案の他の実施例の第２図類似の断面
図である。 FIG. 1 is a front cross-sectional view of an embodiment of the tundish of the present invention, FIG. 2 is a cross-sectional view taken along the line A-A in FIG.
FIG. 3 is a sectional view similar to FIG. 2 of another embodiment of the present invention.
第１図に示すようにタンデイツシユ１の底面
１′に取鍋ノズル３を挾んで内堰５、外堰６をそ
れぞれ設ける。内堰５は取鍋ノズル３に接近させ
て、取鍋ノズル３と取鍋ノズル３に近い方の排出
孔７−１の間に設けるものとする。外堰６は内堰
５と排出孔７−１の間に設けるものとする。内堰
５と外堰６の長さは第２図に示すごとくタンデイ
ツシユ１の巾と同等とし、その高さは、内堰５、
外堰６ともほぼ同等とし、第１図に示すごとく、
溶鋼面２より低い位置とする。第３図に示すもの
はＴ型タンデイツシユに適用した場合のもので、
内堰５はタンデイツシユの凸部１−１を仕切るご
とく配置し、外堰６は第２図に示す場合と同様タ
ンデイツシユの巾と同等とする。 As shown in FIG. 1, an inner weir 5 and an outer weir 6 are provided on the bottom surface 1' of the tundish 1, with a ladle nozzle 3 in between. The inner weir 5 is provided close to the ladle nozzle 3 and between the ladle nozzle 3 and the discharge hole 7-1 closer to the ladle nozzle 3. The outer weir 6 shall be provided between the inner weir 5 and the discharge hole 7-1. The lengths of the inner weir 5 and the outer weir 6 are equal to the width of the tundish 1 as shown in Figure 2, and the heights of the inner weir 5,
It is assumed to be almost the same as outer weir 6, and as shown in Figure 1,
The position should be lower than the molten steel surface 2. The one shown in Figure 3 is applied to a T-type tundish.
The inner weir 5 is arranged to partition the convex portion 1-1 of the tundish, and the outer weir 6 has the same width as the tundish as in the case shown in FIG.
第１図〜第３図に示すように、これらの内堰
５、外堰６はその高さをＡ、内堰５と取鍋ノズル
中心との距離をＢ、外堰６と取鍋ノズル中心との
距離をＣ、取鍋ノズル下端とタンデイツシユ底面
との距離をＤ、溶鋼深さをＥ、取鍋ノズル中心と
タンデイツシユ中心に近い排出口７−１との距離
をＦとして次の関係を満足させるものとする。 As shown in Figures 1 to 3, the height of these inner weir 5 and outer weir 6 is A, the distance between the inner weir 5 and the center of the ladle nozzle is B, and the distance between the outer weir 6 and the center of the ladle nozzle is The distance between the ladle nozzle and the bottom of the tundish is C, the distance between the lower end of the ladle nozzle and the bottom of the tundish is D, the depth of the molten steel is E, and the distance between the center of the ladle nozzle and the outlet 7-1 near the center of the tundish is F, and the following relationship is satisfied. shall be allowed to do so.
Ａ＝（0.2〜0.5）Ｅ、Ｂ＝（0.1〜0.3）Ｆ、 Ｃ＝（0.4〜0.6）Ｆ、Ｄ＝（0.7〜1.0）Ａ。 A=(0.2~0.5)E, B=(0.1~0.3)F, C=(0.4~0.6)F, D=(0.7~1.0)A.
内堰５、外堰６の高さＡが上記関係より高すぎ
ては溶鋼が必要以上に滞溜し、溶鋼中に均一分散
したPb，Biをタンデイツシユ底面に沈降、堆積
してしまうおそれがあり、逆に低すぎては未溶解
のPb，Biを排出口７−１、あるいは７−２に流
入させてしまう。内堰の位置Ｂ、外堰の位置Ｃに
ついても同様に遠すぎては必要以上に溶鋼の滞溜
を起し、近すぎては未溶解Pb，Biを流出させる。
取鍋ノズル３の先端の位置に関してはＤが大きす
ぎると未溶解Pb，Biが内堰、外堰の外に出てし
まい、Ｄが小さすぎては溶鋼滞溜が大きすぎる。
なお、第１図において８−１，８−２は鋳込みノ
ズルである。 If the height A of the inner weir 5 and outer weir 6 is too high than the above relationship, the molten steel will accumulate more than necessary, and there is a risk that Pb and Bi uniformly dispersed in the molten steel will settle and accumulate on the bottom of the tundish. On the contrary, if it is too low, undissolved Pb and Bi will flow into the discharge port 7-1 or 7-2. Similarly, if the position B of the inner weir and the position C of the outer weir are too far, molten steel will accumulate more than necessary, and if they are too close, undissolved Pb and Bi will flow out.
Regarding the position of the tip of the ladle nozzle 3, if D is too large, undissolved Pb and Bi will come out of the inner and outer weirs, and if D is too small, the molten steel will accumulate too much.
In addition, in FIG. 1, 8-1 and 8-2 are casting nozzles.
本考案はこのように構成されているので取鍋ノ
ズル３の溶鋼流は内堰５内で一時溜まり、次にオ
ーバーフローし、外堰６内で再び一時滞溜し、そ
の後排出口７−１，７−２から鋳型に供給され
る。この時未溶融のPb，Biは内堰５、外堰６に
よつて堰止められ排出口７−１，７−２には流出
しない。 Since the present invention is constructed in this manner, the molten steel flow from the ladle nozzle 3 temporarily accumulates in the inner weir 5, then overflows, temporarily stagnates again in the outer weir 6, and then flows through the discharge ports 7-1, It is supplied to the mold from 7-2. At this time, unmelted Pb and Bi are blocked by the inner weir 5 and outer weir 6 and do not flow out to the discharge ports 7-1 and 7-2.
（実施例 ２）
第４図は従来のタンデイツシユと上記実施例１
で説明した本考案タンデイツシユを用いた時の各
タンデイツシユ内溶鋼中の未溶解Pbの分布を示
し、第４図にａ〜ｄで示す黒丸は従来のタンデイ
ツシユの場合であり、ａ〜ｄは第５図イに示す位
置に対応する。ｄは取鍋ノズル中心の位置であ
る。第４図のｅ〜ｉで示す白丸は本考案タンデイ
ツシユの場合であり、ｅ〜ｉは第５図ロに示す位
置に対応する。ｉは取鍋ノズル中心の位置であ
る。第４図及び第５図から、本考案タンデイツシ
ユを用いることにより未溶解Pbを内堰、外堰で
堰止めた効果が明確となつている。(Example 2) Figure 4 shows the conventional tundish and the above-mentioned Example 1.
The distribution of undissolved Pb in the molten steel in each tundish when using the tundish of the present invention explained in Fig. 4 is shown. Corresponds to the position shown in Figure A. d is the position of the center of the ladle nozzle. The white circles indicated by e to i in FIG. 4 are for the tundish of the present invention, and e to i correspond to the positions shown in FIG. 5b. i is the position of the center of the ladle nozzle. From FIGS. 4 and 5, it is clear that by using the tundish of the present invention, the effect of stopping undissolved Pb at the inner and outer weirs is clear.
（考案の効果）
以上のように本考案は溶鋼中に添加した際未溶
解となりやすいPb，Biをタンデイツシユから鋳
型に流出することを防止でき、鋳片の品質向上に
好適である。(Effects of the invention) As described above, the invention can prevent Pb and Bi, which tend to remain unmelted when added to molten steel, from flowing out from the tundish into the mold, and is suitable for improving the quality of slabs.
第１図は本考案タンデイツシユの実施例の正面
の断面図、第２図は第１図のＡ−Ａ矢示断面図、
第３図は本考案タンデイツシユの他の例の第２図
類似の断面図、第４図は従来タンデイツシユと本
考案タンデイツシユとの未溶解Pbの蓄積状況の
比較図、第５図イ，ロは従来タンデイツシユ及び
本考案タンデイツシユでの未溶解Pbの測定位置
を表わす図である。
１……タンデイツシユ、１′……タンデイツシ
ユ底面、１−１……タンデイツシユ凸部、２……
溶鋼面、３……取鍋ノズル、５……内堰、６……
外堰、７−１，７−２……溶鋼排出孔、８−１，
８−２……鋳込みノズル。
FIG. 1 is a front cross-sectional view of an embodiment of the tundish of the present invention, FIG. 2 is a cross-sectional view taken along the line A-A in FIG.
Fig. 3 is a cross-sectional view similar to Fig. 2 of another example of the tundish of the present invention, Fig. 4 is a comparison diagram of the accumulation status of undissolved Pb between the conventional tundish and the tundish of the present invention, and Fig. 5 A and B are of the conventional tundish. FIG. 2 is a diagram showing the measurement positions of undissolved Pb in a tandy dish and a tandy dish of the present invention. 1...Tandite tray, 1'...Tundite tray bottom surface, 1-1...Tundite tray convex portion, 2...
Molten steel surface, 3... Ladle nozzle, 5... Inner weir, 6...
Outer weir, 7-1, 7-2... Molten steel discharge hole, 8-1,
8-2... Casting nozzle.
Claims (1)
削鋼又はPbおよびBiを複合して含有する快削鋼
の製造のために用いるタンデイツシユであつて、
該タンデイツシユの底面で、取鍋ノルズと溶鋼排
出孔の間に内堰と外堰の２重の下堰を設け、その
高さを溶鋼面より小とし、その長さをタンデイツ
シユ巾と同等とし、かつ以下の条件： 内堰、外堰の高さをＡ、取鍋ノズル中心と内堰
との距離をＢ、取鍋ノズル中心と外堰との距離を
Ｃ、取鍋ノズル下端とタンデイツシユ底面との距
離をＤ、溶鋼深さをＥ、取鍋ノズル中心と取鍋ノ
ズルに近い排出孔までの距離をＦとした時、 Ａ＝（0.2〜0.5）Ｅ、Ｂ＝（0.1〜0.3）Ｆ、 Ｃ＝（0.4〜0.6）Ｆ、Ｄ＝（0.7〜1.0）Ａ、 を満足させたことを特徴とする２重下堰タンデイ
ツシユ。[Claims for Utility Model Registration] A tandate used for manufacturing molten steel containing Pb and Bi, such as Pb free-cutting steel, Bi free-cutting steel, or free-cutting steel containing a combination of Pb and Bi,
A double lower weir, an inner weir and an outer weir, is provided between the ladle knolls and the molten steel discharge hole on the bottom of the tundish, the height of which is smaller than the molten steel surface, and its length is equal to the width of the tundish, And the following conditions: The height of the inner and outer weirs is A, the distance between the center of the ladle nozzle and the inner weir is B, the distance between the center of the ladle nozzle and the outer weir is C, the lower end of the ladle nozzle and the bottom of the tundish When the distance is D, the molten steel depth is E, and the distance between the center of the ladle nozzle and the discharge hole near the ladle nozzle is F, A = (0.2 ~ 0.5) E, B = (0.1 ~ 0.3) F, A double lower weir tundish characterized by satisfying the following: C=(0.4-0.6)F, D=(0.7-1.0)A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984197024U JPH0117410Y2 (en) | 1984-12-25 | 1984-12-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984197024U JPH0117410Y2 (en) | 1984-12-25 | 1984-12-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61111648U JPS61111648U (en) | 1986-07-15 |
| JPH0117410Y2 true JPH0117410Y2 (en) | 1989-05-19 |
Family
ID=30754997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1984197024U Expired JPH0117410Y2 (en) | 1984-12-25 | 1984-12-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0117410Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4521880B2 (en) * | 2006-06-06 | 2010-08-11 | 山陽特殊製鋼株式会社 | Continuous casting method to prevent contamination sources from entering tundish |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS608133B2 (en) * | 1978-07-07 | 1985-03-01 | 日本鋼管株式会社 | Continuous steel casting method |
| JPS5921697B2 (en) * | 1980-08-02 | 1984-05-22 | 新日本製鐵株式会社 | Continuous casting tandesh |
-
1984
- 1984-12-25 JP JP1984197024U patent/JPH0117410Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61111648U (en) | 1986-07-15 |
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