JPH0469021B2 - - Google Patents
Info
- Publication number
- JPH0469021B2 JPH0469021B2 JP60022029A JP2202985A JPH0469021B2 JP H0469021 B2 JPH0469021 B2 JP H0469021B2 JP 60022029 A JP60022029 A JP 60022029A JP 2202985 A JP2202985 A JP 2202985A JP H0469021 B2 JPH0469021 B2 JP H0469021B2
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- control device
- flow rate
- tundish
- molten metal
- 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 - Lifetime
Links
- 229910052751 metal Inorganic materials 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 14
- 238000009749 continuous casting Methods 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 description 13
- 239000010959 steel Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 12
- 239000011819 refractory material Substances 0.000 description 3
- 239000011449 brick Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/14—Closures
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は連続鋳造用タンデイツシユにおける流
量制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a flow rate control device in a continuous casting tundish.
従来の技術
近年製鋼の分野における連続鋳造化については
著しいものがある。これは連続鋳造技術が一般の
造塊法に比較して高い生産性と歩留を得られるた
めである。連続鋳造法は一般的にはタンデイツシ
ユと呼ばれる溶湯容器から鋳型内に溶鋼を注入し
鋳型内で固化せしめつつ鋳片を連続的に下方に引
抜くものである。その際問題となるのは溶鋼流量
の制御であり、更に鋼の品質向上を狙う場合には
大気遮断の確実性が鋳造の要点となる。Prior Art In recent years, there has been remarkable progress in continuous casting in the field of steel manufacturing. This is because continuous casting technology provides higher productivity and yield compared to general ingot-forming methods. The continuous casting method generally involves injecting molten steel into a mold from a molten metal container called a tundish, solidifying it in the mold, and then continuously pulling the slab downward. In this case, the problem is controlling the flow rate of molten steel, and if the aim is to improve the quality of steel, the reliability of blocking the atmosphere is a key point in casting.
現在採用されている流量制御方法には主に次の
３種類が挙げられる。 There are mainly three types of flow rate control methods currently employed:
オープン方式
ノズル・ストツパー方式
スライドバルブ方式
更に具体的には、(a)、タンデイツシユ等への溶
鋼の初期注出に際しての不純物混入防止及び注出
時の渦流防止を図る溶融金属容器が実開昭54−
93014号公報に開示されている。また、(b)、溶鋼
流出時の渦巻き発生を防止することによつて、溶
融中への空気及びスラグの巻き込みを防止するこ
とにより、ノズル閉塞の防止、鋼品質向上及びス
ライドバルブ装置の摺動盤表面の損傷を防止しか
つ寿命の延長を図る溶融金属排出用ノズルが実開
昭49−110015号公報に開示され、更に、(c)、浸漬
ノズルの鋳型内の湯面下部に浸漬された部分にあ
る開口を開閉して流量調整を行なう浸漬ノズル
が、特開昭59−220263号公報に開示されている。 Open method Nozzle/stopper method Slide valve method More specifically, (a), a molten metal container that prevents impurities from entering during the initial pouring of molten steel into a tundish, etc. and prevents swirling currents during pouring was first developed in 1972. −
It is disclosed in Publication No. 93014. In addition, (b) by preventing the formation of swirls when molten steel flows out, it prevents air and slag from being drawn into the melt, thereby preventing nozzle clogging, improving steel quality, and improving the sliding of the slide valve device. A nozzle for discharging molten metal that prevents damage to the plate surface and extends its life is disclosed in Japanese Utility Model Application Publication No. 110015/1972, and furthermore, (c), the immersion nozzle is immersed below the molten metal level in the mold. A submerged nozzle that adjusts the flow rate by opening and closing an opening in a portion is disclosed in Japanese Patent Laid-Open No. 59-220263.
発明が解決しようとする問題点
前記オープン方式は主に建設用棒鋼等を鋳造す
るビレツトマシンに多い型でノズルノの口径のみ
で流量を制御する方式である。そのためノズルの
口径が溶損により拡大したり、鋼中の非金属介在
物で閉塞したりすると所期の流量が得られないと
いう欠点がある。Problems to be Solved by the Invention The open type is a type that is commonly used in billet machines that mainly cast steel bars for construction, and is a type in which the flow rate is controlled only by the diameter of the nozzle nozzle. Therefore, if the diameter of the nozzle expands due to melting damage or becomes blocked by nonmetallic inclusions in the steel, there is a drawback that the desired flow rate cannot be obtained.
前記ノズル・ストツパー方式はノズルの上端に
ストツパー（栓）を設置し流量制御を行なうが、
ノズルまたはストツパーの嵌合面が溶損されると
流量制御が困難となるし、非金属介在物の多い溶
鋼の場合は嵌合面に閉塞現象が発生し制御不能と
なる場合もある。 In the nozzle/stopper method, a stopper (plug) is installed at the upper end of the nozzle to control the flow rate.
If the fitting surface of the nozzle or stopper is damaged by erosion, it becomes difficult to control the flow rate, and in the case of molten steel with many nonmetallic inclusions, a clogging phenomenon may occur on the fitting surface, making control impossible.
前記スライドバルブ方式はタンデイツシユの下
に穴のあいた板状の耐火物を２枚もしくは３枚あ
わせてそのうちの１枚を摺動することによりノズ
ルの開閉の操作をする機構である。この方式は耐
火物の溶損には非常に威力を発揮するが、一方欠
点として構成する耐火物間の目地数が多く外気の
巻き込みが発生し易く鋼の清浄化という面で前述
のノズル・ストツパー方式より劣ることが知られ
ている。 The slide valve system is a mechanism in which the nozzle is opened and closed by sliding one of two or three plate-shaped refractories with holes under the tundish. This method is very effective in preventing corrosion of refractories, but the disadvantage is that there are many joints between the refractories, which makes it easy for outside air to get caught in. It is known that this method is inferior to the method.
前記公知技術ａ及びｂは何れも流量制御をスラ
イデイングノズルで行なうものであり、従つて外
気の巻き込みが発生し易く鋼の清浄化上欠点があ
り、また公知技術ｃは鋳型内に乱流を生じ鋳片に
悪影響を及ぼし、溶鋼の凝固による排出不能、エ
ア及びスラグの巻き込みが避け難く、構成耐火物
部材の寸法精度が厳密に要求され、しかも大型と
なり非現実的構成である等の諸欠陥がある。 Both of the above-mentioned known techniques a and b use sliding nozzles to control the flow rate, which tends to cause outside air to be drawn in, which is a disadvantage in terms of cleaning the steel, and known technique c causes turbulent flow within the mold. Various defects such as adversely affecting the formed slab, inability to discharge due to solidification of molten steel, entrainment of air and slag, strict dimensional accuracy of constituent refractory members, and unrealistic configuration due to large size. There is.
問題点を解決するための手段
本発明はこれら従来の流量制御装置の欠点を補
うために全体的にはノズル・ストツパータイプに
近い構造を有し、流量制御部分はスライドバルブ
タイプに近い構造とすることで流量制御の信頼性
と鋼品質の向上を目的としたものである。Means for Solving the Problems In order to compensate for the shortcomings of these conventional flow rate control devices, the present invention has an overall structure similar to a nozzle/stopper type, and a flow control part that has a structure similar to a slide valve type. The purpose of this is to improve the reliability of flow control and steel quality.
本発明者等は種々検討の結果本発明の開発に成
功したもの、ノズル頭部にタンデイツシユ内に突
出する延長部を有し、該延長部側壁にノズル内溶
湯流通孔に連通する流量制御口を開口し、該流量
制御口の開口割合を調節する摺動制御具を前記溶
湯流通孔に摺動自在に配設してなる連続鋳造用タ
ンデイツシユ流量制御装置にあり、摺動制御具が
ノズル溶湯流通孔を摺動する棒状体又は前記延長
部を囲撓しかつ摺動する外筒である。本発明の技
術的構成は前記特許請求の範囲各項に明記したと
おりであり、本発明の実施の数例を示す添付図面
に基いて詳述する。 The inventors of the present invention succeeded in developing the present invention as a result of various studies.The nozzle head has an extension that protrudes into the tundish, and the side wall of the extension has a flow control port that communicates with the molten metal flow hole in the nozzle. A tundish flow rate control device for continuous casting includes a sliding control device slidably disposed in the molten metal flow hole to adjust the opening ratio of the flow rate control port, and the sliding control device adjusts the opening ratio of the flow rate control port. It is a rod-shaped body that slides in the hole or an outer cylinder that surrounds and slides on the extension. The technical structure of the present invention is as specified in each claim, and will be explained in detail with reference to the accompanying drawings showing several examples of implementation of the present invention.
第１図は本発明流量制御装置の使用態様を示す
断面図、第２図は本発明装置の要部を示す断面側
面図、第３図は第２図の矢視側面図である。図面
において１はノズルであり、該ノズル１はタンデ
イツシユ内に突出した延長部１′を具備している。
該延長部１′にはノズル１内の溶湯流通孔１０に
連通する流量制御口６をノズル１の側壁に相対面
して２個（複数個）穿設、開口してある。２は摺
動制御棒を示し、ノズル１の溶湯流通孔１０内に
上方より摺動自在に嵌挿してある。なお第１図に
おいて３はノズル受けれんが、４はタンデイツシ
ユ本体、５は溶湯を夫々示す。 FIG. 1 is a sectional view showing how the flow rate control device of the present invention is used, FIG. 2 is a sectional side view showing essential parts of the device of the present invention, and FIG. 3 is a side view taken in the direction of the arrow in FIG. In the drawing, reference numeral 1 designates a nozzle, which nozzle 1 is provided with an extension 1' projecting into the tundish.
Two (plurality) of flow control ports 6 communicating with the molten metal flow holes 10 in the nozzle 1 are bored and opened in the extension portion 1' facing the side wall of the nozzle 1. Reference numeral 2 denotes a sliding control rod, which is slidably inserted into the molten metal flow hole 10 of the nozzle 1 from above. In FIG. 1, 3 indicates a nozzle receiving brick, 4 indicates a tundish body, and 5 indicates a molten metal.
第４図は本発明装置の別の例を示し、この例の
摺動制御具２′は図示の如くノズル延長部１′を囲
撓しかつ摺動する外筒とした構造としてある。 FIG. 4 shows another example of the device of the present invention, and the sliding control device 2' of this example has a structure in which the nozzle extension 1' is surrounded by a sliding outer cylinder as shown in the figure.
発明の効果
本発明は上述の如き構成からなつており、かゝ
る構成によつて次の如き効果が達成される。Effects of the Invention The present invention has the above-described configuration, and the following effects are achieved by this configuration.
(1) 本発明品は流量制御を流入孔の開口割合で行
うため、ノズルストツパータイプに比べて応答
性が高い。(1) Since the product of the present invention controls the flow rate based on the opening ratio of the inflow hole, it has higher responsiveness than the nozzle stopper type.
(2) 本発明品は、ノズル頭部にタンデイツシユ内
に突出する延長部を設けてあり、従つて外部に
通じる目地が少ないことにより鋳造時の空気巻
き込みが少くなり鋼品質の改善に効果がある。(2) The product of the present invention has an extension on the nozzle head that protrudes into the tundish, so there are fewer joints leading to the outside, which reduces air entrainment during casting and is effective in improving steel quality. .
(3) 一方、流入孔６は形状を大きくしたり、数を
増すことにより必要断面積を確保することが容
易である。これは、アルミ閉塞による注入速度
の減少対策に有効である。(3) On the other hand, it is easy to ensure the required cross-sectional area of the inflow holes 6 by enlarging their shape or increasing their number. This is effective in countering the decrease in injection speed due to aluminum blockage.
第１図は本発明流量制御装置の使用態様を示す
断面図、第２図は本発明装置の要部を示す断面側
面図、第３図は第２図の矢視側面図、第４図は本
発明の他の例を示す断面図であり、
図中：１はノズル、２は摺動制御棒、３はノズ
ル受けれんが、４はダンデイツシユ本体、５は溶
湯、６は流量制御口、１０は溶湯流通孔。
FIG. 1 is a cross-sectional view showing how the flow rate control device of the present invention is used, FIG. 2 is a cross-sectional side view showing the main parts of the device of the present invention, FIG. 3 is a side view taken in the direction of the arrow in FIG. 2, and FIG. It is a cross-sectional view showing another example of the present invention, in the figure: 1 is a nozzle, 2 is a sliding control rod, 3 is a nozzle receiving brick, 4 is a dungeon body, 5 is a molten metal, 6 is a flow rate control port, 10 is a Molten metal flow hole.
Claims (1)
長部を有し、該延長部側壁にノズル内溶湯流通孔
に連通する流量制御口を開口し、該流量制御口の
開口割合を調節する摺動制御具を前記溶湯流通孔
に摺動自在に配設してなる連続鋳造用タンデイツ
シユ流量制御装置。 ２ 前記摺動制御具がノズル溶湯流通孔内を摺動
する棒状体である特許請求の範囲第１項記載の連
続鋳造用タンデイツシユ流量制御装置。 ３ 前記摺動制御具が前記延長部を囲撓しかつ摺
動する外筒である特許請求の範囲第１項記載の連
続鋳造用タンデイツシユ流量制御装置。[Scope of Claims] 1. The nozzle head has an extension that projects into the tundish, a flow control port that communicates with the molten metal flow hole in the nozzle is opened in the side wall of the extension, and the opening ratio of the flow control port is controlled. A tundish flow rate control device for continuous casting, comprising a sliding control device slidably disposed in the molten metal flow hole. 2. The tundish flow rate control device for continuous casting according to claim 1, wherein the sliding control device is a rod-shaped body that slides within the nozzle molten metal flow hole. 3. The tundish flow rate control device for continuous casting according to claim 1, wherein the sliding control device is an outer cylinder that surrounds and slides on the extension portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60022029A JPS61182857A (en) | 1985-02-08 | 1985-02-08 | Device for controlling flow rate of tundish for continuous casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60022029A JPS61182857A (en) | 1985-02-08 | 1985-02-08 | Device for controlling flow rate of tundish for continuous casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61182857A JPS61182857A (en) | 1986-08-15 |
| JPH0469021B2 true JPH0469021B2 (en) | 1992-11-05 |
Family
ID=12071549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60022029A Granted JPS61182857A (en) | 1985-02-08 | 1985-02-08 | Device for controlling flow rate of tundish for continuous casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61182857A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2037766T3 (en) * | 1987-08-03 | 1993-07-01 | Didier-Werke Ag | ROTATING CLOSURE FOR FUNDAMENTALALLY VERTICAL BLEEDING OF A LIQUID MASS OF MELTED METAL FROM A METALLURGICAL CONTAINER. |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59220263A (en) * | 1983-05-30 | 1984-12-11 | Kurosaki Refract Co Ltd | Immersion nozzle |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49110015U (en) * | 1973-01-16 | 1974-09-19 | ||
| JPS5493014U (en) * | 1977-12-15 | 1979-07-02 |
-
1985
- 1985-02-08 JP JP60022029A patent/JPS61182857A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59220263A (en) * | 1983-05-30 | 1984-12-11 | Kurosaki Refract Co Ltd | Immersion nozzle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61182857A (en) | 1986-08-15 |
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