JPS6360068A - Sealing device for pouring flow of ingot making - Google Patents
Sealing device for pouring flow of ingot makingInfo
- Publication number
- JPS6360068A JPS6360068A JP20486286A JP20486286A JPS6360068A JP S6360068 A JPS6360068 A JP S6360068A JP 20486286 A JP20486286 A JP 20486286A JP 20486286 A JP20486286 A JP 20486286A JP S6360068 A JPS6360068 A JP S6360068A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- ladle
- sealing
- molten steel
- pipe
- 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.)
- Pending
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 52
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 24
- 239000010959 steel Substances 0.000 claims abstract description 24
- 239000007789 gas Substances 0.000 claims abstract description 16
- 239000011261 inert gas Substances 0.000 claims abstract description 14
- 238000002347 injection Methods 0.000 claims description 55
- 239000007924 injection Substances 0.000 claims description 55
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 4
- 238000005266 casting Methods 0.000 abstract description 4
- 239000001301 oxygen Substances 0.000 abstract description 4
- 229910052760 oxygen Inorganic materials 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 239000000523 sample Substances 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Landscapes
- Continuous Casting (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、造塊注入流のシール装置に関し、特に下注
式造塊装置において、取鍋から注入管への注入流の酸化
を防止できるようにしたシール構造に関するものである
。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a sealing device for an injected ingot flow, and in particular, in a bottom pouring ingot making device, it is possible to prevent oxidation of the injected flow from a ladle to an injection pipe. The present invention relates to such a seal structure.
製鋼工程においては、従来より、転炉５電気炉等で溶製
された溶鋼を一旦鋳型で造塊した後、分塊、圧延する方
式が広く採用されており、造塊過程では取鍋内の溶鋼を
注入管を介して下方より鋳型内に注入する下注法が一般
的に用いられている。In the steelmaking process, a method has traditionally been widely adopted in which molten steel produced in a converter 5 electric furnace, etc. is first made into an ingot in a mold, then bloomed and rolled. A bottom pouring method is generally used in which molten steel is injected into a mold from below through an injection pipe.
ここで第４図に下注式造塊装置を模式的に示す。Here, FIG. 4 schematically shows a bottom pouring type agglomeration device.
図において、取鍋１の底面には取鍋ノズル２が設けられ
、一方、注入管３は複数の各鋳型４の底部に連通されて
おり、取Ｍ４１がクレーン等で搬送されて取鍋ノズル２
が注入管３の直上に来ると、取＆ｉ４１内の溶鋼は取鍋
ノズル２から注入管３内に注入され、各鋳型４に至って
鋳型４内を上昇し、こうして鋳型４内に注入される。In the figure, a ladle nozzle 2 is provided on the bottom of a ladle 1, while an injection pipe 3 is communicated with the bottom of each of a plurality of molds 4, and a ladle M41 is transported by a crane or the like to the ladle nozzle 2.
When the steel comes directly above the injection pipe 3, the molten steel in the ladle &i 41 is injected from the ladle nozzle 2 into the injection pipe 3, reaches each mold 4, rises within the mold 4, and is thus injected into the mold 4.
しかるにこの下注式造塊装置では、取鍋ノズル２′を出
た注入流５が一旦大気に触れ、その後注入管３に流入し
、又この注入管３への流入時に溶鋼中に大気の巻き込み
が生じ、これらの作用のために溶鋼中に酸素が吸収され
、これが鋼中の酸化物系介在物を増加させる要因となっ
ていた。However, in this bottom-pouring type ingot making device, the injection stream 5 that exits the ladle nozzle 2' once comes into contact with the atmosphere, then flows into the injection pipe 3, and when flowing into the injection pipe 3, the air is drawn into the molten steel. These effects cause oxygen to be absorbed into the molten steel, which causes an increase in oxide inclusions in the steel.
そこで従来は、上述の酸化物系介在物を低減させるため
、第５図ｉａｌに示すように、注入管３の上端縁にシー
ル用ガス管７を設けて注入流５を不活性ガスでシールす
る方法、あるいは第５図（ｂｌに示すように、下面が開
口したシールボックス６によって注入流５を覆い、シー
ルボックス６内にシール用ガス管７から不活性ガスを供
給してシールする方法が提案されていたが、そのシール
構造上、十分なシール性を確保することが困難であった
。Conventionally, in order to reduce the above-mentioned oxide-based inclusions, a sealing gas pipe 7 is provided at the upper edge of the injection pipe 3 to seal the injection flow 5 with an inert gas, as shown in FIG. Alternatively, as shown in Fig. 5 (bl), a method is proposed in which the injected flow 5 is covered with a seal box 6 whose bottom surface is open, and an inert gas is supplied into the seal box 6 from a sealing gas pipe 7 to seal it. However, due to the seal structure, it was difficult to ensure sufficient sealing performance.
また第６図に示すように、上側、下側のシール板８，９
及びシールボックスｉｏ、ｉｔ、スプリング１２．上側
シール板押さえ１４．によって伍閉構造とし、シールガ
ス供給用ガス管１３から不活性ガスを供給して注入流５
をシールする方法。In addition, as shown in FIG. 6, upper and lower seal plates 8, 9
and seal box io, it, spring 12. Upper seal plate holder 14. The inert gas is supplied from the gas pipe 13 for sealing gas supply and the injection flow 5 is made into a closed structure.
How to seal.
あるいは第７図に示すように、上側、下側シールボッ８
．９．スプリング１２．上側シール板押さえ１４、シー
ル用ジャバラ１５．シールボックス１６によって密閉構
造とし、シールガス供給用ガス管１３から不活性ガスを
供給して注入流５をシールする方法が提案されていた。Alternatively, as shown in Figure 7, the upper and lower seal boxes 8
．． 9. Spring 12. Upper seal plate retainer 14, sealing bellows 15. A method has been proposed in which the injection flow 5 is sealed by providing a sealed structure with a seal box 16 and supplying an inert gas from a gas pipe 13 for supplying seal gas.
この第６図、第７図のシール構造では、十分なシール性
を確保できるが、構造が複雑で、設備が大がかりになる
という問題があった。Although the seal structure shown in FIGS. 6 and 7 can ensure sufficient sealing performance, there are problems in that the structure is complicated and the equipment becomes large-scale.
さらに耐火物レンガやノズルによる密閉方法も考えられ
ていたが、初期のＮＷＡ流出作業（取鍋ノズルさぐり作
業）が行いに＜＜、又注入流からのサンプルが採取しに
＜＜、実用化の面で問題がありた。Furthermore, sealing methods using refractory bricks and nozzles were also considered, but the initial NWA outflow work (ladle nozzle groping work) was difficult to perform, and samples from the injection flow were difficult to collect. There was a problem with the surface.
（発明が解決しようとする問題点３
以上のように従来の造塊注入流のシール構造では、十分
なシール性を確保できないか、あるいはシール性を確保
できても、設備が大がかりになるか、又は取鍋ノズルの
さぐり作業やサンプリング作業が困難であるという問題
があり、造塊における無酸化鋳造はほとんど行われてい
ないのが実情であった。(Problem to be Solved by the Invention 3) As mentioned above, with the conventional sealing structure for ingot injection flow, it is not possible to ensure sufficient sealing performance, or even if sealing performance can be secured, the equipment will be large-scale. Another problem is that it is difficult to probe the ladle nozzle and sample, and the reality is that non-oxidation casting in ingot making is hardly performed.
この発明は、かかる従来の問題点に鑑み、簡単な構造が
もって注入流を完全にシールでき、しがも取鍋ノズルの
さぐり作業やサンプリング作業を容易に行うことのでき
る造塊注入流のシール装置を提供せんとするものである
。In view of such conventional problems, the present invention provides a seal for the agglomerate injection flow that has a simple structure and can completely seal the injection flow, making it easy to probe the ladle nozzle and perform sampling operations. The aim is to provide the equipment.
そこでこの発明に係る造塊注入流のシール装置は、下注
式造塊装置において、溶鋼注入時に注入管に昇降自在に
挿入されるシール用ノズルを取鍋ノズルに設け、注入管
内に不活性ガスを供給するガス供給手段を設けたもので
ある。Therefore, in the ingot injection flow sealing device according to the present invention, in a bottom pouring type ingot making device, a sealing nozzle that is inserted into the injection pipe in a vertically movable manner during injection of molten steel is provided in the ladle nozzle, and an inert gas is injected into the injection pipe. The system is equipped with a gas supply means for supplying gas.
ここで本発明におけるシール用ノズルは、取鍋ノズルと
別体に形成したもの、及び一体に形成したものの両方が
含まれる。Here, the sealing nozzle in the present invention includes both those formed separately from the ladle nozzle and those formed integrally with the ladle nozzle.
この発明においては、取鍋ノズルと注入管との間の溶鋼
をシール用ノズルで覆うとともに、注入管内に不活性ガ
スを供給するようにしたことから、溶鋼流が外気に対し
て確実にシールされ、又シール用ノズルを注入管に対し
て昇降自在としたこ、−から、シール用ノズルを上昇さ
せて注入流の確認及びサンプルの採取を容易に行うこと
が可能である。In this invention, the molten steel between the ladle nozzle and the injection pipe is covered with a sealing nozzle, and an inert gas is supplied into the injection pipe, so that the molten steel flow is reliably sealed from the outside air. Also, since the sealing nozzle can be moved up and down with respect to the injection tube, it is possible to easily confirm the injection flow and take samples by raising the sealing nozzle.
以下、本発明の実施例を図について説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
第１図及び第２図は本発明の一実施例による造塊注入流
のシール装置を示す０図において、取鍋１の底部にはス
ライディングノズル１７が設けられ、該スライディング
ノズル１７には取鍋ノズル２が取付けられている。そし
てこの取鍋ノズル２にはシール用ノズル１日の上端が嵌
合固定されており、このシール用ノズル１８は円筒状の
ものでその下部は注入管３内に挿入可能になっている。1 and 2 show a sealing device for an agglomerate injection flow according to an embodiment of the present invention, in which a sliding nozzle 17 is provided at the bottom of the ladle 1; Nozzle 2 is attached. The upper end of a sealing nozzle 18 is fitted and fixed into this ladle nozzle 2, and this sealing nozzle 18 is cylindrical, and its lower part can be inserted into the injection pipe 3.
一方、注入管３の上端部は略逆円錐状に形成され、該注
入管３の上端縁にはシール用リング（ガス供給手段）１
９が固着され、該リング１９にはガス供給管２０が連通
して接続されており、又シール用リング１９の内縁には
水平方向及び斜め下方に不活性ガスを噴出するための透
孔１９ａ、１９ｂが形成されている。On the other hand, the upper end of the injection tube 3 is formed into a substantially inverted conical shape, and a sealing ring (gas supply means) 1 is attached to the upper edge of the injection tube 3.
9 is fixed to the ring 19, and a gas supply pipe 20 is connected in communication with the ring 19, and the inner edge of the sealing ring 19 has a through hole 19a for ejecting inert gas horizontally and diagonally downward. 19b is formed.
次に本実施例の作用効果について説明する。Next, the effects of this embodiment will be explained.
取鍋１は、転炉、１ｉ気炉等で溶製された溶鋼が注入さ
れるとクレーン等によって鋳型に向けて搬送され、シー
ル用ノズル１８が注入管３の真上に来ると降下され、こ
れによりシール用ノズル１８が注入管３内に挿入される
。そして取鍋１内の溶鋼はスライディングノズル１７．
取鍋ノズル２及びシール用ノズル１８を径て注入管３内
に注入される。その際、注入管３内にはガス供給管２０
゜シール用リング１９及び透孔１９ａ、１９ｂを径て不
活性ガスが供給されており、これにより注入管３内に流
入する溶！１１５は確実に外気、ひいては酸素からシー
ルされ、こうして注入管３内に流入した溶鋼は各鋳型に
送られて鋳型に注入されることとなる。When the ladle 1 is injected with molten steel produced in a converter, 1i air furnace, etc., it is transported by a crane or the like toward the mold, and when the sealing nozzle 18 comes directly above the injection pipe 3, it is lowered. As a result, the sealing nozzle 18 is inserted into the injection pipe 3. The molten steel in the ladle 1 is then passed through the sliding nozzle 17.
It is injected into the injection pipe 3 through the ladle nozzle 2 and the sealing nozzle 18. At that time, a gas supply pipe 20 is installed inside the injection pipe 3.
An inert gas is supplied through the sealing ring 19 and the through holes 19a and 19b, and this causes the melt to flow into the injection pipe 3! 115 is reliably sealed from the outside air and ultimately from oxygen, and the molten steel that has flowed into the injection pipe 3 is thus sent to each mold and injected into the mold.
また注入流を確認する場合、あるいはサンプル採取を行
う場合には、取鍋１を上昇させてシール用ノズル１８を
注入管３内から上方に抜けばよい。Furthermore, when checking the injection flow or collecting a sample, the ladle 1 may be raised and the sealing nozzle 18 may be removed upwardly from within the injection pipe 3.
以上のような本実施例のシール装置では、取鍋ノズル２
と注入管３の間の溶鋼流５をシール用ノズル１８で覆う
とともに、注入管３内に不活性ガスを充満させるように
したので、簡単な構造で溶鋼流を確実に酸素からシール
することができ、その結果鋼中の酸化物系介在物を大幅
に低減できる。In the sealing device of this embodiment as described above, the ladle nozzle 2
Since the molten steel flow 5 between the injection pipe 3 and the injection pipe 3 is covered with the sealing nozzle 18 and the injection pipe 3 is filled with inert gas, it is possible to reliably seal the molten steel flow from oxygen with a simple structure. As a result, oxide inclusions in steel can be significantly reduced.
また本シール装置では、シール用ノズルを注入管に対し
て昇降できるようにしたので、必要な時にシール用ノズ
ルを上昇させて注入流のｆｌ認やサンプル採取を容品に
行なうことができ、その結果造塊時における無酸化鋳造
を実用化できる。In addition, in this sealing device, the sealing nozzle can be moved up and down relative to the injection tube, so when necessary, the sealing nozzle can be raised to check the injection flow and take samples from the container. As a result, oxidation-free casting during ingot making can be put to practical use.
なお上記実施例では透孔を有するシール用リング１９を
用いたが、このシール用リング１９は第３図に示すよう
にスリット１９ｃを形成したものであってもよい、また
ガス供給手段は注入管の形状にあわせて円形のシール用
リングとしたが、注入管内に不活性ガスを充満させるこ
とのできるものであればどのような形状のものであって
もよい。In the above embodiment, a sealing ring 19 having a through hole was used, but the sealing ring 19 may have a slit 19c as shown in FIG. 3, and the gas supply means may be an injection pipe. Although a circular sealing ring is used to match the shape of the ring, it may be of any shape as long as it can fill the injection pipe with inert gas.
さらにまた、上記実施例ではシール用ノズルを取鍋ノズ
ルと別体に形成したが、本発明では両ノズルを一体に形
成してもよく、要は取鍋を下降したとき、シール用ノズ
ルが注入管内に挿入されるように構成すればよい。Furthermore, in the above embodiment, the sealing nozzle was formed separately from the ladle nozzle, but in the present invention, both nozzles may be formed integrally.In short, when the ladle is lowered, the sealing nozzle What is necessary is just to structure it so that it may be inserted into a pipe.
以上のように、本発明に係る造塊注入流のシール装置に
よれば、溶鋼注入時に注入管に昇降自在に挿入されるシ
ール用ノズルを取鍋に設け、注入管内に不活性ガスを供
給するガス供給手段を設けたので、簡単な構造で注入流
を完全にシールでき、しかも取鍋ノズルのさぐり作業及
びサンプリング作業を簡単に行うことができる効果があ
る。As described above, according to the ingot injection flow sealing device according to the present invention, a sealing nozzle is provided in the ladle and is inserted into the injection pipe in a vertically movable manner during injection of molten steel, and inert gas is supplied into the injection pipe. Since the gas supply means is provided, the injection flow can be completely sealed with a simple structure, and the ladle nozzle probing operation and sampling operation can be easily performed.
第１図は本発明の一実施例による造塊注入流のシール装
置を示す断面図、第２図は上記シール装置に使用される
シール用リングの底面図、第３図は本発明の他の実施例
におけるシール用リングの底面図、第４図は下注式造塊
法を示す模式図、第５図（ａｌ、 （ｂｌ、第６図及び
第７図は各々従来のシール構造を示す図である。
図において、ｌは取鍋、２は取鍋ノズル、３は注入管、
１８はシール用ノズル、１９はシール用リング（ガス供
給手段）である。FIG. 1 is a sectional view showing a sealing device for an agglomerate injection flow according to an embodiment of the present invention, FIG. 2 is a bottom view of a sealing ring used in the above sealing device, and FIG. A bottom view of the sealing ring in the example, FIG. 4 is a schematic diagram showing the bottom pouring ingot method, and FIGS. In the figure, l is a ladle, 2 is a ladle nozzle, 3 is an injection pipe,
18 is a sealing nozzle, and 19 is a sealing ring (gas supply means).
Claims (1)
下方より注入する下注式造塊装置において、取鍋ノズル
に設けられ溶鋼注入時に注入管に昇降自在に挿入されて
取鍋ノズルからの溶鋼を注入管内に案内するシール用ノ
ズルと、注入管内に不活性ガスを供給するガス供給手段
とを備えたことを特徴とする造塊注入流のシール装置。(1) In a bottom-pouring type ingot making device in which molten steel in a ladle is injected from below the mold through an injection pipe from a ladle nozzle, it is installed in the ladle nozzle and is inserted into the injection pipe so as to be able to rise and fall when pouring molten steel. A sealing device for an ingot injection flow, comprising a sealing nozzle for guiding molten steel from a pot nozzle into an injection pipe, and a gas supply means for supplying an inert gas into the injection pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20486286A JPS6360068A (en) | 1986-08-29 | 1986-08-29 | Sealing device for pouring flow of ingot making |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20486286A JPS6360068A (en) | 1986-08-29 | 1986-08-29 | Sealing device for pouring flow of ingot making |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6360068A true JPS6360068A (en) | 1988-03-16 |
Family
ID=16497627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20486286A Pending JPS6360068A (en) | 1986-08-29 | 1986-08-29 | Sealing device for pouring flow of ingot making |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6360068A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998004370A1 (en) * | 1996-07-26 | 1998-02-05 | Foseco International Limited | Shrouding means |
-
1986
- 1986-08-29 JP JP20486286A patent/JPS6360068A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998004370A1 (en) * | 1996-07-26 | 1998-02-05 | Foseco International Limited | Shrouding means |
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