JPS63256248A - Continuous casting method and molten metal supplying nozzle for continuous casting - Google Patents
Continuous casting method and molten metal supplying nozzle for continuous castingInfo
- Publication number
- JPS63256248A JPS63256248A JP8928687A JP8928687A JPS63256248A JP S63256248 A JPS63256248 A JP S63256248A JP 8928687 A JP8928687 A JP 8928687A JP 8928687 A JP8928687 A JP 8928687A JP S63256248 A JPS63256248 A JP S63256248A
- Authority
- JP
- Japan
- Prior art keywords
- area
- hot water
- nozzle
- discharge hole
- continuous casting
- 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
- 239000002184 metal Substances 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000009749 continuous casting Methods 0.000 title claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 43
- 238000005266 casting Methods 0.000 abstract description 13
- 229910000831 Steel Inorganic materials 0.000 abstract description 7
- 230000005499 meniscus Effects 0.000 abstract description 7
- 239000010959 steel Substances 0.000 abstract description 7
- 238000007599 discharging Methods 0.000 abstract 3
- 238000007654 immersion Methods 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 5
- 239000011261 inert gas Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000011143 downstream manufacturing Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 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
- B22D41/50—Pouring-nozzles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、連続鋳造方法及びそれに使用する給湯ノズル
に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a continuous casting method and a hot water supply nozzle used therein.
（従来の技術）
従来、連続鋳造に使用されている給湯ノズルの内周面に
おけるＡ１ｔ０２の析出の要因の一つは、タンディツシ
ュと給湯ノズルの間で空気の巻込みが起こり、溶鋼中の
ＡＩが二次酸化されてＡｈ０２が生成し、給湯ノズル内
の溶鋼の流れが緩いとこの八１□０．が給湯ノズルの内
周面に析出するためであると考えられている。そして、
給湯ノズルの内周面にこのＡｌｔｏｓが析出するとノズ
ルが閉塞して片流れが起こり、鋳片に対して良好な結果
が得られない。(Prior art) One of the reasons for the precipitation of A1t02 on the inner circumferential surface of the hot water supply nozzle conventionally used in continuous casting is that air is entrained between the tundish and the hot water nozzle, and AI in the molten steel is Secondary oxidation produces Ah02, and if the flow of molten steel in the hot water supply nozzle is slow, this 81□0. It is thought that this is because the water is deposited on the inner circumferential surface of the hot water supply nozzle. and,
If this Altos is deposited on the inner circumferential surface of the hot water supply nozzle, the nozzle will be blocked and one-sided flow will occur, making it impossible to obtain good results for the slab.
従って、給湯ノズルには、給湯時的周面へのＡｌ２Ｏ３
の析出を防止する為、その内断面は溶鋼流が必要とする
以上の断面積を有していた。このため、給湯ノズルの外
径が大きくなって鋳型長辺側壁面との間隔が少なくなり
、その部分の溶鋼流れが停滞し、鋳片縦割れの原因とな
っていた。よって、従来、一般に使用されている給湯ノ
ズルでは２００龍以下の厚さの鋳片を高速で連続鋳造す
ることは不可能であった。Therefore, when hot water is supplied to the hot water nozzle, Al2O3 is applied to the circumferential surface during hot water supply.
In order to prevent the precipitation of molten steel, its inner cross section had a cross-sectional area larger than that required by the molten steel flow. For this reason, the outer diameter of the hot water supply nozzle becomes large, and the distance from the long side wall surface of the mold becomes small, and the flow of molten steel in that part becomes stagnant, causing vertical cracking of the slab. Therefore, it has been impossible to continuously cast slabs with a thickness of 200 mm or less at high speed with conventionally used hot water nozzles.
そこで、従来は給湯ノズルの内面にスリット溝を形成せ
しめてこのスリット溝にＡ「ガス等のイナートガスを供
給し、二次酸化を防止したり、給湯ノズル内面に付着し
たＡＩ、０．を剥離する等の対策を施していた。Therefore, in the past, a slit groove was formed on the inner surface of the hot water supply nozzle, and an inert gas such as A gas was supplied to the slit groove to prevent secondary oxidation or to peel off the AI, 0. attached to the inner surface of the hot water supply nozzle. Measures such as these were taken.
（発明が解決しようとする問題点）
しかしながら、前記したイナートガスを供給する方法で
はスリット溝を有する給湯ノズルの製造コストやイナー
トガスのコストが高くつくという問題があった。更に、
鋳片内にイナートガスの気泡が残留し、品質を悪化させ
る等の問題もあった。(Problems to be Solved by the Invention) However, the method for supplying inert gas described above has a problem in that the manufacturing cost of the hot water supply nozzle having the slit groove and the cost of the inert gas are high. Furthermore,
There were also problems such as inert gas bubbles remaining in the slab, deteriorating quality.
本発明はかかる問題点に鑑みて成されたものであり、Ａ
ＩｚＯ＋の析出を防止して２００龍以下の厚さの鋳片を
高速で連ｖｔ鋳造する方法、及びそれに使用する給湯ノ
ズルを提供せんとするものである。The present invention has been made in view of such problems, and A.
It is an object of the present invention to provide a method of continuously casting slabs having a thickness of 200 mm or less at high speed while preventing precipitation of IzO+, and a hot water supply nozzle used therein.
（問題点を解決するための手段）
本発明の第１は、上端に開口を、下端部側壁に吐出孔を
設けたノズル本体の上部に、０．１７〜０．２５のテー
パを設けてそれ以下の内断面積が前記開口面積の５０〜
６０％となる長円形と成すと共に、前記吐出孔の総面積
を前記長円形部の面積より大きくしかつ下向きに形成し
たことを要旨とする連続鋳造用給湯ノズルである。(Means for Solving the Problems) The first aspect of the present invention is to provide a taper of 0.17 to 0.25 at the upper part of the nozzle body, which has an opening at the upper end and a discharge hole at the lower end side wall. The following internal cross-sectional areas are 50 to 50% of the opening area:
This hot water supply nozzle for continuous casting has an oval shape of 60%, the total area of the discharge holes is larger than the area of the oval part, and the discharge holes are formed downward.
また本発明の第２は、上端に開口を、下端部側壁に吐出
孔を設けたノズル本体の上部に、０．１７〜０．２５の
テーパを設けてそれ以下の内断面積が前記開口面積の５
０〜６０％となる長円形と成すと共に、前記吐出孔の総
面積を前記長円形部の面積より大きくしかつ下向きに形
成した連続鋳造用給湯ノズルを用いてタンディツシュか
ら鋳型に溶湯を供給する場合に、電磁ブレーキを印加し
て前記吐出孔から流出する溶湯の流速を遅く制御するこ
とを要旨とする連続鋳造方法である。The second aspect of the present invention is to provide a taper of 0.17 to 0.25 in the upper part of the nozzle body, which has an opening at the upper end and a discharge hole in the side wall of the lower end, so that the internal cross-sectional area smaller than that is the opening area. 5
When supplying molten metal from a tundish to a mold using a continuous casting hot water supply nozzle formed into an oval shape with a diameter of 0 to 60%, the total area of the discharge holes being larger than the area of the oval part, and facing downward. This continuous casting method is characterized in that the flow rate of the molten metal flowing out from the discharge hole is controlled to be slow by applying an electromagnetic brake.
本発明において、上部に設けるテーパを０．１７〜０．
２５の範囲としたのは、次の理由による。すなわち、前
記テーパは連続鋳造機の形状によって異なるものの、本
発明者らの研究・実験によればテーパが０．２５より大
きくなると給湯ノズル内に乱流が生じ、一方０．１７よ
り小さくなると給湯ノズル本体の長さが長くなりすぎて
メニスカス上部が長くなり、抜熱によるＡＩ、０．の析
出を引き起こすからである。また、タンディツシュと鋳
型間の距離が予め決まっている場合にはテーパが小さい
と当初期待している整流化及び給湯ノズル内の高流速化
が得られないからでもある。In the present invention, the taper provided at the upper part is 0.17 to 0.
The reason for setting the range to 25 is as follows. That is, although the taper varies depending on the shape of the continuous casting machine, according to research and experiments by the present inventors, when the taper is larger than 0.25, turbulent flow occurs in the hot water supply nozzle, while when the taper is smaller than 0.17, the hot water supply is interrupted. The length of the nozzle body becomes too long and the upper part of the meniscus becomes long, resulting in an AI of 0.0 due to heat removal. This is because it causes precipitation of. Another reason is that if the distance between the tundish and the mold is predetermined, the initially expected flow rectification and high flow velocity in the hot water supply nozzle cannot be achieved if the taper is small.
また本発明において、長円形部の断面積を上端開口面積
の５０〜６０％としたのは、操業条件よりスライディン
グノズルプレートの開度を見た場合には、スライディン
グノズル上端の開口面積の２０〜２５％程度で操業が行
われているのが常である為、前記長円形部の断面積はそ
の２〜３倍で十分だからである。In addition, in the present invention, the cross-sectional area of the oval part is set to 50 to 60% of the opening area of the upper end, because when looking at the opening of the sliding nozzle plate from the operating conditions, it is 20% to 60% of the opening area of the upper end of the sliding nozzle. This is because the cross-sectional area of the oval portion is sufficient to be 2 to 3 times that amount since the operation is normally carried out at about 25%.
更に本発明において吐出孔の総面積を前記長円形部の面
積より大きくしたのは吐出孔からの出口流速を給湯ノズ
ル本体内を流れる流速よりも遅くしてメニスカスを安定
させるためである。Furthermore, in the present invention, the total area of the discharge holes is made larger than the area of the oval part in order to stabilize the meniscus by making the outlet flow velocity from the discharge holes slower than the flow velocity inside the hot water supply nozzle body.
（作 用）
本発明は、上端に開口を、下端部側壁に吐出孔を設けた
ノズル本体の上部に、０．１７〜０．２５のテーパを設
けてそれ以下の内断面積が前記開口面積の５０〜６０％
となる長円形と成すと共に、前記吐出孔の総面積を前記
長円形部の面積より大きくしかつ下向きに形成した構成
である為、給湯ノズル内を流れる溶湯の流速が速くなり
、一方吐出孔からの出側流速は遅くなる。(Function) According to the present invention, a taper of 0.17 to 0.25 is provided at the upper part of the nozzle body, which has an opening at the upper end and a discharge hole at the side wall of the lower end, so that the internal cross-sectional area smaller than that is the opening area. 50-60% of
In addition to forming an oval shape, the total area of the discharge hole is larger than the area of the oval part and is formed downward, so the flow rate of the molten metal flowing inside the hot water supply nozzle becomes faster, while the flow rate from the discharge hole increases. The outlet flow velocity becomes slower.
また、本発明は、上端に開口を、下端部側壁に吐出孔を
設けたノズル本体の上部に、０．１７〜０．２５のテー
パを設けてそれ以下の内断面積が前記開口面積の５０〜
６０％となる長円形と成すと共に、前記吐出孔の総面積
を前記長円形部の面積より大きくしかつ下向きに形成し
た連続鋳造用給湯ノズルを用いてタンディツシュから鋳
型に溶湯を供給する場合に、電磁ブレーキを印加して前
記吐出孔から流出する溶湯の流速を遅く制御するもので
ある為、メニスカスが安定する。Further, the present invention provides a nozzle body having an opening at the upper end and a discharge hole at the lower end side wall, with a taper of 0.17 to 0.25 on the upper part of the nozzle body, so that the internal cross-sectional area below this is 50% of the opening area. ~
When supplying molten metal from a tundish to a mold using a continuous casting hot water supply nozzle formed into an oval shape with a total area of 60%, the total area of the discharge holes being larger than the area of the oval part, and facing downward, Since the electromagnetic brake is applied to control the flow rate of the molten metal flowing out from the discharge hole to be slow, the meniscus is stabilized.
（実 施 例）
以下、本発明を添付図面に示す一実施例に基づいて説明
する。(Example) The present invention will be described below based on an example shown in the accompanying drawings.
第１図は本発明に係る連続鋳造用給湯ノズルの一実施例
を示す図面であり、（イ）は正面図中央縦断面図、（ロ
）は側面図、（ハ）は平面図、（ニ）は（イ）の二−二
断面図である。FIG. 1 is a drawing showing an embodiment of a hot water supply nozzle for continuous casting according to the present invention, in which (A) is a front view and a central vertical sectional view, (B) is a side view, (C) is a plan view, and (N) is a side view. ) is a 2-2 sectional view of (a).
第１図において、１はノズル本体であり、上端に開口２
を、下端部側壁に吐出孔３を設けていると共に、メニス
カス位置には他の部分と異なるスラグライン用耐火物４
が取付けられている。In Fig. 1, 1 is a nozzle body, and an opening 2 is provided at the upper end.
A discharge hole 3 is provided in the side wall of the lower end, and a refractory material 4 for the slag line, which is different from other parts, is installed at the meniscus position.
is installed.
前記構成は従来の給湯ノズルと同じであるが、本発明に
あっては、第１図（ニ）に示すようにノズル本体ｌの内
断面を従来の給湯ノズルより小面積の長円形と成してい
るのである。そして、この長円形部の面積は前記開口２
の面積の５０〜６０％の範囲内となるように形成され、
この長円形部と開口２間は０．１７〜０．２５の範囲内
のテーパで連続するように成されている。加えて本発明
は、前記吐出孔３の面積を前記長円形部の面積より大面
積と成し、かつこれを例えばｌＯ〜３０”の範囲下向き
に形成している。The above configuration is the same as that of a conventional hot water supply nozzle, but in the present invention, as shown in FIG. -ing The area of this oval portion is the opening 2
formed within a range of 50 to 60% of the area of
The distance between this oval portion and the opening 2 is continuous with a taper within a range of 0.17 to 0.25. In addition, in the present invention, the area of the discharge hole 3 is larger than the area of the oval part, and is formed downward in a range of, for example, 10 to 30''.
すなわち、本発明方法を適用するに際して、給湯ノズル
の浸漬深さと電磁ブレーキの印加を変化させて前記吐出
孔３の下向き角度の最適値を求めたのが第２図である。That is, when applying the method of the present invention, the optimal value of the downward angle of the discharge hole 3 was determined by changing the immersion depth of the hot water supply nozzle and the application of the electromagnetic brake, as shown in FIG.
この第２図より明らかなように、浸漬深さが１００ｍｍ
未満では吐出孔３をどのような角度にしても給湯ノズル
に空気巻込みが発生してＡＩｚＯｚが析出する。これに
対して浸漬深さが１００ ｍｍ以上の場合にはこのよう
な問題は発生しない。As is clear from this figure 2, the immersion depth is 100mm.
If the angle is less than that, air entrainment will occur in the hot water supply nozzle no matter what angle the discharge hole 3 is set to, and AIzOz will precipitate. On the other hand, this problem does not occur when the immersion depth is 100 mm or more.
一方、前記角度がｌＯ°未溝の場合には浸漬深さが１０
０ ｍｍ以上でもメニスカス中央部に盛上がりが発生し
鋳片の性状が悪くなる。また、前記角度が３０”を超え
ると鋳型の下部から渦流れがはみ出して鋳造できなくな
る。On the other hand, if the angle is 10°, the immersion depth is 10°.
Even if it is more than 0 mm, a bulge will occur in the center of the meniscus, and the properties of the slab will deteriorate. Furthermore, if the angle exceeds 30'', a vortex flow protrudes from the lower part of the mold, making it impossible to cast.
従って、前記角度はｌＯ〜３０°の範囲が好ましい、な
お、第２図中斜線部は電磁ブレーキの印加範囲を示して
いる。Therefore, the angle is preferably in the range of 10 to 30 degrees. Note that the shaded area in FIG. 2 indicates the range of application of the electromagnetic brake.
すなわち、本発明に係る給湯ノズルは内断面積を従来の
給湯ノズルの内断面積より小さくすることにより、ノズ
ル内面に乱流が生じることなく淀みもなくなって溶湯差
圧がそのまま作用し、管内流速が速くなって析出したＡ
ｔｚｏａをノズル内面に付着させることなく流下させて
ノズル閉塞を防止せんとしているのである。In other words, by making the internal cross-sectional area of the hot water supply nozzle according to the present invention smaller than that of conventional hot water supply nozzles, turbulence does not occur on the inner surface of the nozzle and stagnation is eliminated, so that the differential pressure of the molten metal acts as it is, and the flow rate in the pipe is increased. became faster and precipitated A
The purpose is to prevent the nozzle from clogging by allowing the tzoa to flow down without adhering to the inner surface of the nozzle.
しかし、内断面積を単に小さくするだけでは析出したＡ
１□Ｏ１の付着に起因するノズル閉塞は防止できても溶
湯流量が少なすぎる為、高速鋳造は無理である。However, if the internal cross-sectional area is simply reduced, the precipitated A
Even if nozzle clogging due to the adhesion of 1□O1 can be prevented, high-speed casting is impossible because the flow rate of the molten metal is too low.
そこで本発明では内断面を長円形とすることによって２
００鰭以下の厚さの鋳片を高速で連続鋳造するのに十分
な給湯量が得られるようにしているのである。Therefore, in the present invention, by making the inner cross section into an oval shape, two
The amount of hot water supplied is sufficient to continuously cast slabs with a thickness of 0.00 mm or less at high speed.
一方、ノズル内の流速は可及的速い方がよいのであるが
、吐出孔３からの出口流速は遅い方がメニスカスが安定
するために好ましい。そこで本発明では吐出孔３全体の
面積を前記長円形部の面積よりも大きくしかつ吐出孔３
を下向きに形成しているのである。On the other hand, although it is better for the flow velocity inside the nozzle to be as fast as possible, it is preferable for the outlet flow velocity from the discharge hole 3 to be slow because the meniscus is stabilized. Therefore, in the present invention, the area of the entire discharge hole 3 is made larger than the area of the oval part, and the discharge hole 3 is
is formed downward.
本発明は、上記した構成の給湯ノズルを用いて連続鋳造
するのであるが、本発明方法ではこれに加えて吐出孔３
からの出口流速をより適正に制御するために電磁ブレー
キを印加しているのである。In the present invention, continuous casting is carried out using the hot water supply nozzle having the above-described configuration, but in addition to this, in the method of the present invention,
An electromagnetic brake is applied to more appropriately control the outlet flow velocity.
次に本発明に係る給湯ノズルを使用し、本発明方法によ
り鋳造を行った結果について説明する。Next, the results of casting according to the method of the present invention using the hot water supply nozzle according to the present invention will be explained.
なお、鋳造に供した鋳型内寸法は長さＬ１２００×幅Ｗ
２５０ｘ深さ０７００ｍのものである。The internal dimensions of the mold used for casting are length L1200 x width W.
It is 250m x 0700m deep.
鋳造時における短辺盛上がり量を測定した結果、第３図
に示すように電磁ブレーキを印加しない場合は、場面盛
り上がりが激しく、パウダーの流込みが起こらず、鋳造
不可能であった。また、従来の給湯ノズルでは、４〜６
Ｉｍ程度の場面変動が常に起こっていた。これに対して
、電磁ブレーキを印加した場合は、通常の鋳込以上に場
面は安定し、理想的な鋳造が可能となった。As a result of measuring the amount of bulge on the short side during casting, as shown in FIG. 3, when the electromagnetic brake was not applied, the bulge on the short side was severe, powder did not flow in, and casting was impossible. In addition, with conventional hot water nozzles, 4 to 6
Im-level scene changes were always occurring. On the other hand, when an electromagnetic brake was applied, the situation became more stable than normal casting, and ideal casting became possible.
更に析出したＡｌｇＯｓの付着量と吐出流速との関係を
第５図に示す。本発明の給湯ノズルはノズル内の流速が
速いために第４図（イ）に示す如くＡＩ！０３の付着が
殆どなく全く問題がなかったのに対し、従来の給湯ノズ
ルは、第４図（ロ）に示す如くノズル内の流速が遅いた
めに吐出孔までＡ１□Ｏ１の付着が認められた。Further, FIG. 5 shows the relationship between the amount of deposited AlgOs and the discharge flow rate. Since the hot water supply nozzle of the present invention has a high flow velocity inside the nozzle, as shown in FIG. There was almost no adhesion of 03 and there was no problem at all, whereas in the conventional hot water supply nozzle, as shown in Figure 4 (b), because the flow velocity inside the nozzle was slow, adhesion of A1□O1 was observed up to the discharge hole. .
尚、従来の流速は、吐出孔出側で０．７５ｍ／秒（計算
値）に対し、本発明では、約４倍の３．１ｍ／秒の流速
となっている。Note that, while the conventional flow velocity is 0.75 m/sec (calculated value) on the outlet side of the discharge hole, in the present invention, the flow velocity is approximately four times that of 3.1 m/sec.
そして、電磁ブレーキ出側では電磁ブレーキ強度３で０
．１５ｍ／秒程度となり、非常に静かに鋳造されている
。なお、電磁ブレーキは、１００Ａ〜４００Ａの範囲で
印加した。And on the electromagnetic brake output side, the electromagnetic brake strength is 3 and 0.
．． The casting speed is approximately 15 m/sec, making it extremely quiet. In addition, the electromagnetic brake was applied in the range of 100A to 400A.
以上示した如く、本発明に係る給湯ノズルと電磁ブレー
キを組み合わせる本発明方法によって、従来大きな問題
となっていたノズル閉塞を解消し、従来の生産能力以上
の能力を得る事が出来た。As shown above, by combining the hot water supply nozzle according to the present invention and the electromagnetic brake, the nozzle clogging, which had been a major problem in the past, was solved, and production capacity exceeding the conventional production capacity could be obtained.
（発明の効果）
以上説明したように本発明は、上端に開口を、下端部側
壁に吐出孔を設けたノズル本体の上部に、０．１７〜０
．２５のテーパを設けてそれ以下の内断面積が前記開口
面積の５０〜６０％となる長円形と成すと共に、前記吐
出孔の総面積を前記長円形部の面積より大きくしかつ下
向きに形成した連続鋳造用給湯ノズル及びこの給湯ノズ
ルを用いてタンディツシュから鋳型に溶湯を供給する場
合に、電磁ブレーキを印加して前記吐出孔から流出する
溶湯の流速を遅く制御する方法であり、従来大きな問題
となっていたノズル閉塞を解消し、性状の良好な鋳片を
高速で連続鋳造できるという大なる効果を有する。また
、本発明給湯ノズルは高速鋳込みでも薄いスラブの鋳造
を可能にし、下工程の圧延ミルの負担を軽減できるとい
うすぐれた効果もある。(Effects of the Invention) As explained above, the present invention provides a 0.17 to 0.0
．． A taper of 25 mm is provided to form an oval shape with an internal cross-sectional area below that being 50 to 60% of the opening area, and the total area of the discharge hole is larger than the area of the oval part and is formed downward. This is a method of applying an electromagnetic brake to slow the flow rate of the molten metal flowing out from the discharge hole when supplying molten metal from the tundish to the mold using the continuous casting hot water supply nozzle, which has traditionally caused major problems. It has the great effect of eliminating the nozzle blockage that had previously occurred, and allowing slabs with good properties to be continuously cast at high speed. Furthermore, the hot water supply nozzle of the present invention enables casting of thin slabs even during high-speed casting, and has the excellent effect of reducing the burden on the rolling mill in the downstream process.
第１図（イ）〜（ニ）は本発明に係る給湯ノズルの一実
施例を示す説明図、第２図は吐出孔の角度と給湯ノズル
の浸漬深さ及び電磁ブレーキ印加の範囲との関係図、第
３図〜第５図は本発明方法による実験結果を示す図面で
あり、第３図は電磁ブレーキ印加強度と短辺盛上がり量
との関係図、第４図はＡｈ０３の析出状況の説明図で、
（イ）は本発明、（ロ）は従来、第５図は吐出孔からの
吐出流速とＡＩｔｏ、付着量の関係を示す図面である。
ｌはノズル本体、２は開孔、３は吐出孔。
特許出願人 住友金属工業株式会社
第１ｖＡ
第２図
０ ５０ １００ ＋５０ ２００２５０ ３００
３ＳＯ４００ｊ灸ン′ｊｉｉ：５未ｔ 伽爪）
第３Ｍ 第４閃
第５図
吐臥流道（物）Figures 1 (A) to (D) are explanatory diagrams showing one embodiment of the hot water supply nozzle according to the present invention, and Figure 2 is the relationship between the angle of the discharge hole, the immersion depth of the hot water supply nozzle, and the range of electromagnetic brake application. Figures 3 to 5 are drawings showing the experimental results according to the method of the present invention. Figure 3 is a relationship diagram between the electromagnetic brake application intensity and the short side bulge amount, and Figure 4 is an explanation of the precipitation situation of Ah03. In the figure,
(A) is the present invention, (B) is the conventional method, and FIG. 5 is a diagram showing the relationship between the discharge flow rate from the discharge hole, AIto, and the amount of adhesion. 1 is the nozzle body, 2 is the opening, and 3 is the discharge hole. Patent applicant: Sumitomo Metal Industries, Ltd. No. 1vA Fig. 2 0 50 100 +50 200250 300
3SO400j moxibustion 'jii: 5 not t Kazume) 3rd M 4th flash Figure 5 Tuwa ryudo (object)
Claims (2)
ル本体の上部に、０．１７〜０．２５のテーパを設けて
それ以下の内断面積が前記開口面積の５０〜６０％とな
る長円形と成すと共に、前記吐出孔の総面積を前記長円
形部の面積より大きくしかつ下向きに形成したことを特
徴とする連続鋳造用給湯ノズル。(1) A 0.17 to 0.25 taper is provided at the top of the nozzle body, which has an opening at the top end and a discharge hole at the bottom side wall, so that the internal cross-sectional area below this is 50 to 60% of the opening area. 1. A hot water supply nozzle for continuous casting, characterized in that the discharge hole has an oval shape, the total area of the discharge hole is larger than the area of the oval part, and the discharge hole is formed downward.
ル本体の上部に、０．１７〜０．２５のテーパを設けて
それ以下の内断面積が前記開口面積の５０〜６０％とな
る長円形と成すと共に、前記吐出孔の総面積を前記長円
形部の面積より大きくしかつ下向きに形成した連続鋳造
用給湯ノズルを用いてタンディッシュから鋳型に溶湯を
供給する場合に、電磁ブレーキを印加して前記吐出孔か
ら流出する溶湯の流速を遅く制御することを特徴とする
連続鋳造方法。(2) A 0.17 to 0.25 taper is provided at the top of the nozzle body, which has an opening at the top end and a discharge hole at the bottom side wall, so that the internal cross-sectional area below this is 50 to 60% of the opening area. When supplying molten metal from a tundish to a mold using a continuous casting hot water supply nozzle, which has an oval shape and has a total area of the discharge holes larger than the area of the oval part and is directed downward, electromagnetic A continuous casting method characterized by applying a brake to slow down the flow rate of the molten metal flowing out from the discharge hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8928687A JPS63256248A (en) | 1987-04-10 | 1987-04-10 | Continuous casting method and molten metal supplying nozzle for continuous casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8928687A JPS63256248A (en) | 1987-04-10 | 1987-04-10 | Continuous casting method and molten metal supplying nozzle for continuous casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63256248A true JPS63256248A (en) | 1988-10-24 |
Family
ID=13966457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8928687A Pending JPS63256248A (en) | 1987-04-10 | 1987-04-10 | Continuous casting method and molten metal supplying nozzle for continuous casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63256248A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001293549A (en) * | 2000-04-11 | 2001-10-23 | Asahi Tec Corp | Stoke structure for differential pressure casting apparatus |
| JP2013540593A (en) * | 2010-10-20 | 2013-11-07 | ベスビウス グループ，ソシエテ アノニム | Tube for injecting liquid metal, assembly of tube and metal frame, and metal frame |
| JP2019535527A (en) * | 2016-11-23 | 2019-12-12 | エーケー スティール プロパティ−ズ、インク． | Deflector for continuous casting nozzle |
-
1987
- 1987-04-10 JP JP8928687A patent/JPS63256248A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001293549A (en) * | 2000-04-11 | 2001-10-23 | Asahi Tec Corp | Stoke structure for differential pressure casting apparatus |
| JP2013540593A (en) * | 2010-10-20 | 2013-11-07 | ベスビウス グループ，ソシエテ アノニム | Tube for injecting liquid metal, assembly of tube and metal frame, and metal frame |
| JP2019535527A (en) * | 2016-11-23 | 2019-12-12 | エーケー スティール プロパティ−ズ、インク． | Deflector for continuous casting nozzle |
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