JPH0489160A - Tundish for continuous casting - Google Patents
Tundish for continuous castingInfo
- Publication number
- JPH0489160A JPH0489160A JP20221090A JP20221090A JPH0489160A JP H0489160 A JPH0489160 A JP H0489160A JP 20221090 A JP20221090 A JP 20221090A JP 20221090 A JP20221090 A JP 20221090A JP H0489160 A JPH0489160 A JP H0489160A
- Authority
- JP
- Japan
- Prior art keywords
- molten steel
- tundish
- nozzle
- ladle
- plasma torch
- 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
- 238000009749 continuous casting Methods 0.000 title claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 107
- 239000010959 steel Substances 0.000 claims abstract description 107
- 238000003756 stirring Methods 0.000 claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 5
- 238000005266 casting Methods 0.000 claims description 7
- 239000002184 metal Substances 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 13
- 230000005587 bubbling Effects 0.000 description 10
- 238000005188 flotation Methods 0.000 description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 238000000926 separation method Methods 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Continuous Casting (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は溶鋼の連続鋳造方法における、タンディツシ
ュ内の溶鋼介在物のモールド内への持ち込みを減少させ
、タンディツシュ内溶鋼の温度を一定に保ちながら、が
っ溶鋼温度のばらつきを抑え、更にプラズマ加熱装置の
熱効率を向上させる連続鋳造用タンディツシュに関する
ものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention reduces the carry-over of molten steel inclusions in the tundish into the mold in a continuous casting method of molten steel, while keeping the temperature of the molten steel in the tundish constant. This invention relates to a tundish for continuous casting that suppresses variations in molten steel temperature and further improves the thermal efficiency of a plasma heating device.
［従来の技術］
添付の図面を参照しながら、従来技術について説明する
。第３図は従来の介在物の浮上促進を図るタンディツシ
ュ１で、（ａ＞は水平断面図、（ｂ）は（ａ）のＢ−Ｂ
垂直断面図、（ｃ）は（ａ）のＣ−Ｃ垂直断面図である
。[Prior Art] The prior art will be described with reference to the accompanying drawings. Figure 3 shows a conventional tundish 1 for promoting the floating of inclusions, (a> is a horizontal cross-sectional view, (b) is a line BB of (a)
Vertical sectional view, (c) is a CC vertical sectional view of (a).
第３図に示すように取鍋９がら取鍋ノズル３を介してタ
ンディツシュ１へ供給された溶鋼２の温度を一定に保つ
ために、タンディツシュ１内にプラズマトーチ５を設置
し、鋳造時間の長い低速鋳造鋼種における溶鋼の温度低
下を防いでいる。プラズマトーチ５による加熱の場合、
熱が溶鋼の湯面から供給されるため、タンディツシュ１
内の溶鋼２の上部のみ加熱され、タンディツシュ１内の
底部を流れる溶鋼２に充分熱が伝わらず溶鋼温度が不均
一になる。そのため従来は、タンディツシュ１内の固定
堰６の下流側に溶鋼浮上堰１６を設置し溶ｔＩ４２の流
れを上昇させ撹拌を促進する。As shown in Fig. 3, in order to keep the temperature of the molten steel 2 supplied from the ladle 9 to the tundish 1 through the ladle nozzle 3 constant, a plasma torch 5 is installed inside the tundish 1, and the casting time is long. Prevents the temperature of molten steel from dropping in low-speed casting steel types. In the case of heating with plasma torch 5,
Since heat is supplied from the surface of the molten steel, tanditsh 1
Only the upper part of the molten steel 2 inside the tundish 1 is heated, and sufficient heat is not transferred to the molten steel 2 flowing at the bottom of the tundish 1, resulting in uneven temperature of the molten steel. Therefore, conventionally, a molten steel floating weir 16 is installed downstream of the fixed weir 6 in the tundish 1 to raise the flow of the molten steel 42 and promote stirring.
図中、矢印は溶鋼の流れを示す。前記固定堰６はその下
方を溶鋼が流れ、溶鋼浮上堰１６は溶鋼がその上方を溶
鋼が流れるように設けられている。In the figure, arrows indicate the flow of molten steel. The fixed weir 6 is provided so that molten steel flows below it, and the molten steel floating weir 16 is provided so that molten steel flows above it.
溶鋼の攪拌の促進は、タンディツシュ１の底部に設けた
ポーラスレンガからガスバブリングを行って溶鋼２に上
昇流を生じさせることも行われている。Stirring of the molten steel is also promoted by bubbling gas through porous bricks provided at the bottom of the tundish 1 to generate an upward flow in the molten steel 2.
また、タンディツシュ１内の溶鋼浮上堰１６は、従来の
攪拌の他に溶鋼と同時にタンディツシュ１内に持ち込ま
れた介在物を浮上、分離させることも目的の１つである
。溶鋼浮上堰１６以外に溶鋼の介在物を浮上 分離させ
る方法とじては、タンデイ・ノシュ１の容量を大きくし
て溶鋼２のタンディツシュ１内の溶鋼の滞留時間を長く
する方法が取られている。Furthermore, one of the purposes of the molten steel flotation weir 16 in the tundish 1 is to float and separate inclusions brought into the tundish 1 at the same time as the molten steel, in addition to the conventional stirring. In addition to the molten steel flotation weir 16, a method for flotation and separation of molten steel inclusions is to increase the capacity of the tandy nosh 1 to lengthen the residence time of the molten steel 2 in the tandish 1.
「発明か解決しようとする問題点コ
しかしながら、プラズマトーチを使って溶鋼を加熱する
場合には、溶鋼浮上堰］６を使った溶鋼の撹拌程度では
撹拌強度か弱く、溶鋼の温度を均一にするほど充分な撹
拌強度が得られず、モールド内に持ち込まれる溶鋼の温
度にばらつきが生じ、安定した鋳造ができないこと、プ
ラズマトーチからの熱が充分溶鋼に供給されず、プラズ
マトーチの出力を上げざるを得ないためエネルギー的に
不利になること、またプラズマトーチからの熱によって
固定堰６及びタンティッシュ１の耐火物の損傷が激しく
、製造コスト的に非常に不利となるという問題点があっ
た。``Problems to be Solved by the Invention'' However, when heating molten steel using a plasma torch, stirring the molten steel using a molten steel flotation weir [6] has a weak stirring strength; Sufficient stirring strength cannot be obtained, resulting in variations in the temperature of the molten steel brought into the mold, making stable casting impossible, and the heat from the plasma torch not being sufficiently supplied to the molten steel, forcing the output of the plasma torch to be increased. There are also problems in that the heat from the plasma torch severely damages the refractories of the fixed weir 6 and the tongue tissue 1, resulting in a very disadvantageous manufacturing cost.
さらにポーラスレンガを使ったガスバブリングによる溶
鋼の撹拌では、撹拌強度は充分に得られるが、溶鋼中に
残存するガスバブリングの微小気泡がそのままモールド
内に持ち込まれ、鋳片内部欠陥として残り品質上大きな
問題となる。一方タンディッンユ容量の大型化について
は設備上の問題があり、実際の配置上で限界があること
や、大型化によってタンディツシュ１の耐火物の補修か
頻繁に行なわれるのでメンテナンスコストの上昇を招く
などの問題がある。Furthermore, when stirring molten steel by gas bubbling using porous bricks, sufficient stirring strength can be obtained, but the microbubbles from the gas bubbling that remain in the molten steel are brought into the mold as they are, and remain as internal defects in the slab, which have a significant impact on quality. It becomes a problem. On the other hand, there are equipment problems with increasing the capacity of the dandy, such as the fact that there is a limit to the actual layout, and the increased size of the dandy, which requires frequent repairs to the refractories of the dandish 1, leading to an increase in maintenance costs. There's a problem.
また、溶鋼中の介在物の浮上分離についても、溶鋼浮上
堰の場合には介在物浮上を促進するだけの速い上昇流が
確保できないこと、ガスバブリングの場合には介在物を
捕捉して湯面まで上昇したガスバブルが溶湯表面で破裂
する際に、溶湯表面を乱すためにいったん浮上した介在
物が再び混入する恐れがあることなどから問題がある。Regarding flotation and separation of inclusions in molten steel, in the case of a molten steel flotation weir, it is not possible to ensure a fast upward flow that promotes the flotation of inclusions, and in the case of gas bubbling, inclusions are captured and the surface of the molten steel rises. There is a problem in that when the gas bubbles that have risen to a certain level explode on the surface of the molten metal, inclusions that have floated to the surface may become mixed in again to disturb the surface of the molten metal.
本発明はこのような従来の問題点に鑑みてなされたもの
であって、溶鋼温度の均一化と５介在物の浮上分離を促
進することを 目的としている。The present invention has been made in view of these conventional problems, and aims to equalize the temperature of molten steel and promote the flotation and separation of inclusions.
［問題点を解決するための手段］
この発明の連続鋳造用タンディツシュは、溶鋼の入った
取鍋から取鍋ノズルを介してタンディツシュへ注入され
、さらにタンディツシュからタンディツシュノズルを介
してモールドへと注入される鋼の連続鋳造方法において
、前記取鍋ノズルとタンディツシュノズルとの間に溶鋼
を加熱するプラズマトーチを配置し、さらにプラズマト
ーチの近傍で電磁力を攪拌する溶鋼撹拌装置を配置する
ことを特徴とする。[Means for Solving the Problems] The tundish for continuous casting of the present invention is such that molten steel is poured from a ladle into the tundish through a ladle nozzle, and then from the tundish through the tundish nozzle into a mold. In the continuous casting method for steel, a plasma torch for heating molten steel is disposed between the ladle nozzle and the tundish nozzle, and a molten steel stirring device for stirring electromagnetic force is further disposed near the plasma torch. Features.
［作用］
この発明は、取鍋ノズルとタンディツシュノズルとの間
に溶鋼を加熱するプラズマトーチを配置し、さらにプラ
ズマトーチの上流側に電磁力による溶鋼撹拌装置を配置
するので、プラズマトーチの上流側に電磁力による溶鋼
撹拌装置によって、タンディツシュ内の溶鋼に上向きの
流れを生ずる。そうするとタンディツシュ内の底部にあ
る低温の溶鋼が溶鋼表面に供給されるので、その位置に
プラズマトーチが配置されているのでこの低温の溶鋼を
均一に加熱することができる。さらに、溶鋼に上向きの
流れが生じて、溶鋼内の介在物が浮上しやすくなる。[Function] In this invention, a plasma torch for heating molten steel is disposed between a ladle nozzle and a tundish nozzle, and a molten steel stirring device using electromagnetic force is disposed upstream of the plasma torch. An upward flow of the molten steel in the tundish is created by an electromagnetic stirrer on the side. Then, the low-temperature molten steel at the bottom of the tundish is supplied to the surface of the molten steel, and since the plasma torch is placed at that position, this low-temperature molten steel can be uniformly heated. Furthermore, an upward flow occurs in the molten steel, making it easier for inclusions in the molten steel to float up.
［実施例］
以下、この発明を図面に基づいて説明する。第１図は本
発明の１ストランド鋳造用タンデイツシユでの実施例を
示したもので、＜ａ）は平面図で、（ｂ）は（ａ）のＡ
−Ａ断面図である。第１図において、１０はタンディツ
シュであり容量１０７トン、片ストランド鋳造用である
。溶鋼２は取鍋ノズル３を通してタンディツシュ１ｏの
片端からタンディツシュ１０内に注入され、タンディツ
シュ中央部のプラズマトーチ５によって加熱される。こ
のタンディツシュ中央部には保温用のカバー７が設置さ
れており、プラズマトーチ５からの熱を効率よく溶鋼表
面に供給するようになっている。[Example] The present invention will be described below based on the drawings. Figure 1 shows an embodiment of a one-strand casting tundish according to the present invention, in which <a) is a plan view, and (b) is an A of (a).
-A sectional view. In FIG. 1, 10 is a tundish, which has a capacity of 107 tons and is for single-strand casting. Molten steel 2 is injected into the tundish 10 from one end of the tundish 1o through a ladle nozzle 3, and is heated by a plasma torch 5 in the center of the tundish. A heat-retaining cover 7 is installed in the center of the tundish, so that heat from the plasma torch 5 can be efficiently supplied to the surface of the molten steel.
またタンディツシュ１０中央部の両側面外部に、電磁力
による溶鋼攪拌装置例えば、交流リニアモーター型電磁
コイル１１（以下電磁コイルという）は溶鋼流の斜め上
方向に設置されており任意のスピードで磁界を移動する
ことができる。このコイルの容量は１００ＫＷである。In addition, on both sides of the central part of the tundish 10, a molten steel stirring device using electromagnetic force, such as an AC linear motor type electromagnetic coil 11 (hereinafter referred to as an electromagnetic coil), is installed obliquely above the molten steel flow, and generates a magnetic field at an arbitrary speed. Can be moved. The capacity of this coil is 100KW.
今、取鍋ノズル３を通じてタンディツシュ１゜内に注入
された溶鋼２は、プラズマトー千５近傍では層流状態と
なって、湯面近傍はど流速が遅く底部はど速くなってい
る。このときに電磁コイル１１に発生する磁場を一定速
度て斜め上部に移動させると、タンデインシュ１０内の
溶鋼２が磁性体であるなめ溶鋼２も同じように斜め上部
に移動する。図中、白抜きの矢印は電磁コイル１１によ
って発生する磁場の移動方向である。これによって、取
鍋ノズル３から流入された温度の低い溶鋼がすべてプラ
ズマトーチ５の直下で加熱されるので、タンディツシュ
底部を加熱されずに通り抜けてタンディツシュノズル４
を通ってモールド（特に図示せず）に注入されることは
ない。さらに電磁コイル１１がないときにはタンデイン
シュ底部の流速の速い溶鋼流に乗ってモールドに持ち込
まれていた介在物や取鍋スラグは、このコイル１１によ
る磁界の移動に伴う上向き溶鋼流に乗って浮上分離され
る。この電磁コイル１−１は半永久的に使用できるため
コスト的にも有利である。Now, the molten steel 2 injected into the tundish 1° through the ladle nozzle 3 is in a laminar flow state near the plasma tow, and the flow velocity is slow near the surface and faster at the bottom. At this time, when the magnetic field generated in the electromagnetic coil 11 is moved diagonally upward at a constant speed, the molten steel 2 in the tundish 10, which is a magnetic material, also moves diagonally upward in the same way. In the figure, the white arrow indicates the direction of movement of the magnetic field generated by the electromagnetic coil 11. As a result, all of the low-temperature molten steel flowing in from the ladle nozzle 3 is heated directly under the plasma torch 5, so that it passes through the tundish bottom without being heated and reaches the tundish nozzle 4.
It is not injected through the mold (not specifically shown). Furthermore, inclusions and ladle slag that would have been carried into the mold by the fast-flowing molten steel flow at the bottom of the tundish when the electromagnetic coil 11 was not present are floated and separated by the upward molten steel flow caused by the movement of the magnetic field by the coil 11. Ru. Since this electromagnetic coil 1-1 can be used semi-permanently, it is also advantageous in terms of cost.
第１表は第１図の設備を使って、鋳片内の介在物量とプ
ラズマトーチがら溶鋼へ供給された熱効率を示したもの
である。溶鋼として５ＵＳ３０４を７５トン鋳造したと
きに、電磁コイルを使わなかったときと、出力１００Ｋ
Ｗで使用した時を比較した。鋳造速度は０ 、６ ｍ／
ｗｉｎである。電磁コイルを使用したとき、電磁力なし
と比較してプラズマトーチがら溶鋼へ移動した熱効率が
約３０パーセントアツプし、鋳片内の介在物量が３５パ
ーセント減少した。また、溶鋼浮上層１６を設置して上
昇流をつくった場合やアルゴンガスバブリング（流量’
３ｊＱ／分のガスを溶鋼中に吹込むようにする）を行な
った場合と比べても熱効率、介在物指数とも良くなって
いる。Table 1 shows the amount of inclusions in the slab and the efficiency of heat supplied to molten steel from the plasma torch using the equipment shown in Figure 1. When casting 75 tons of 5US304 as molten steel, when no electromagnetic coil was used, and when the output was 100K.
Comparison was made when using W. Casting speed is 0,6 m/
It's a win. When an electromagnetic coil was used, the efficiency of heat transferred from the plasma torch to the molten steel increased by approximately 30%, and the amount of inclusions in the slab was reduced by 35% compared to when no electromagnetic force was used. In addition, when a molten steel floating layer 16 is installed to create an upward flow, or when argon gas bubbling (flow rate '
Both thermal efficiency and inclusion index are improved compared to the case where gas was blown into the molten steel at a rate of 3jQ/min.
第 １ 表
ここて、熱効率、は溶鋼温度上昇分を電力量に換算した
値とプラズマトーチへの電力のインプット量との比に１
００を乗じたもので、介在物指数は本実施例における鋳
片単位体積内介在物個数と、溶鋼浮上層、ガスバブリン
グおよび溶鋼攪拌装置がいずれもないときの鋳片単位体
積内介在物個数との比に１００を乗じたものである。Table 1 Here, thermal efficiency is the ratio of the molten steel temperature rise converted to electric power and the amount of electric power input to the plasma torch.
The inclusion index is the number of inclusions per unit volume of a slab in this example, and the number of inclusions per unit volume of a slab when there is no molten steel floating layer, gas bubbling, or molten steel stirring device. The ratio is multiplied by 100.
第２図は本発明のＴ型２ストランドのタンディツシュの
実施例を示す図を示したもので、（ａ）は平面図、（ｂ
）は（ａ）のＢ−Ｂ断面図、（ｃ）は（ａ＞のＣ−Ｃ断
面図である。容量２０トンのＴ型２ストランドのタンデ
ィツシュ２ｏの溶鋼が２つに分かれる部分に溶鋼加熱用
プラズマトーチ５が設置されており、このプラズマトー
チ５と取鍋ノズル３との外側にタンディツシュ２０の外
側にタンディツシュ２０を挟むように対向した一対の電
磁石１３が配置されている。Figure 2 shows an embodiment of the T-shaped two-strand tundish of the present invention, (a) is a plan view, (b)
) is a cross-sectional view taken along line B-B in (a), and (c) is a cross-sectional view taken along line C-C in (a>). Molten steel is heated at the part where the molten steel of a T-shaped two-strand tundish 2o with a capacity of 20 tons is divided into two parts. A plasma torch 5 is installed, and a pair of electromagnets 13 facing each other are placed outside the tundish 20 on the outside of the plasma torch 5 and the ladle nozzle 3 so as to sandwich the tundish 20 therebetween.
溶鋼２は取鍋ノズル３を通してタンデイ、ンシュ２０か
らタンディツシュ２０内に注入され、・タンディツシュ
２０の中央部のプラズマトーチ５によって加熱される。Molten steel 2 is injected into the tundish 20 from the tundish 20 through the ladle nozzle 3, and is heated by the plasma torch 5 in the center of the tundish 20.
前記電磁石１３に電流を流すと一方がＮ極、他方がＳ極
となり、タンディツシュ２０を挟んで磁界が形成する。When a current is passed through the electromagnet 13, one becomes a N pole and the other becomes an S pole, and a magnetic field is formed with the tundish 20 in between.
前記Ｎ極、Ｓ極を図中、Ｎ、Ｓで示す。また５１はプラ
ズマトーチ用の対極であり、プラズマトーチ５に電流を
流すことによってプラズマトーチ５と対極５１との間に
回路が形成され、プラズマトーチ５からアークとして熱
が発生し、プラズマトーチ５と対極５１との間には磁性
体である溶鋼２を通じて電流１５が流れる。図中、点線
の矢印で電流１５をしめす。The N and S poles are indicated by N and S in the figure. Further, 51 is a counter electrode for the plasma torch, and by passing a current through the plasma torch 5, a circuit is formed between the plasma torch 5 and the counter electrode 51, and heat is generated from the plasma torch 5 as an arc. A current 15 flows between the counter electrode 51 and the molten steel 2 which is a magnetic material. In the figure, the current 15 is indicated by a dotted arrow.
前記磁界と電流１５の相互作用によってフレミングの左
手の法則に従うように溶鋼には第２図に示したような向
きに電磁力１２が発生し、この電磁力１２によって溶鋼
２は上向きの流となる。Due to the interaction between the magnetic field and the current 15, an electromagnetic force 12 is generated in the molten steel in the direction shown in FIG. 2 according to Fleming's left-hand rule, and this electromagnetic force 12 causes the molten steel 2 to flow upward. .
従って溶鋼２がプラズマトーチ５の直下で撹拌されてプ
ラズマトーチ５から溶鋼２への熱効率がアップする。ま
た溶鋼２中の介在物が浮上分離し易くなってくるので、
鋳片内の介在物が減少する。こうして、溶鋼温度か所定
の温度に保持され、介在物が減少した溶鋼が、タンディ
ツシュノズル４を介して鋳型に流入する。Therefore, the molten steel 2 is stirred directly under the plasma torch 5, and the heat efficiency from the plasma torch 5 to the molten steel 2 is increased. In addition, since inclusions in the molten steel 2 become easier to float and separate,
Inclusions in the slab are reduced. In this way, the molten steel, which is maintained at a predetermined temperature and has fewer inclusions, flows into the mold via the tundish nozzle 4.
第２表は第２図の設備を使って炭素鋼を１．４ｍ／１ｌ
ｌｎの鋳造速度で２５０トン鋳造した時の鋳片の介在物
量とプラズマトーチの熱効率を調べた結果である。電磁
石を使わなかったときと出カフ０ＫＷで使用した時及び
溶鋼浮上堰を使用した場合、アルゴンカスバブリング（
５ρ／分のガスを溶鋼中に吹込むようにする）を実施し
た場合を比較した。電磁石を使用したとき、電磁石未使
用、溶鋼浮上堰あり、ガスバブリングあつと比較してプ
ラズマトーチから溶鋼へ移動した熱効率はアップし、鋳
片内の介在物量は減少した。Table 2 shows carbon steel of 1.4m/1l using the equipment shown in Figure 2.
These are the results of investigating the amount of inclusions in the slab and the thermal efficiency of the plasma torch when 250 tons were cast at a casting speed of ln. Argon gas bubbling (
A comparison was made between the cases where gas was blown into the molten steel at a rate of 5ρ/min. When an electromagnet was used, the efficiency of heat transferred from the plasma torch to the molten steel was increased and the amount of inclusions in the slab was reduced compared to when no electromagnet was used, when a molten steel floating weir was present, and when gas bubbling was used.
第２表
第３表にタンディツシュ内の溶鋼温度のバラツキを測定
した結果を示す。測定位置は、第２図で、タンディツシ
ュ２０の長平方向のプラズマトーチ５とタンディツシュ
ノズル４の中央、かつ幅方向の中央で、深さは溶鋼表面
から１００關の位置をＸ点、タンディツシュ底部から１
００ ａｍの位置をＹ点とした。このときの溶鋼深さは
７５０ ＋ａ＋ａである。比較のため、第３図に示すよ
うな従来の固定堰６および溶鋼浮上堰１６を設けた場合
について、同じ位置について溶鋼温度を測定した結果に
ついても示しである。Tables 2 and 3 show the results of measuring the variation in molten steel temperature within the tundish. In Fig. 2, the measurement position is the center of the plasma torch 5 and the tundish nozzle 4 in the longitudinal direction of the tundish 20, and the center in the width direction, and the depth is 100 degrees from the molten steel surface at point X, from the bottom of the tundish. 1
The position of 00 am was defined as the Y point. The depth of the molten steel at this time is 750 +a+a. For comparison, the results of measuring the molten steel temperature at the same position in the case where a conventional fixed weir 6 and a molten steel floating weir 16 as shown in FIG. 3 are provided are also shown.
第３表は８０分間溶鋼を連続的に鋳造した時の、位置Ｘ
点と位置Ｙ点の溶鋼温度差を示したものである。この表
から明らかなように溶鋼浮上堰１６のみの場合において
は、Ｘ点がＹ点よりも溶鋼温度差で約１５℃も高く、ま
たそのバラツキも大きい、一方電磁石１３のみを設置し
た場合（出カフ０Ｗ）は、Ｘ点がＹ点よりも溶鋼温度差
で約３℃高く、またそのバラツキも小さい。Table 3 shows the position X when molten steel was continuously cast for 80 minutes.
It shows the difference in molten steel temperature between point and point Y. As is clear from this table, in the case of only the molten steel floating weir 16, point Cuff 0W), the X point is about 3° C. higher than the Y point due to the molten steel temperature difference, and the variation is small.
第３表
［発明の効果コ
本発明は以上のように、溶鋼加熱用プラズマトーチを有
する連続鋳造用タンディツシュ中に電磁力による溶鋼撹
拌装置を設置することによって、従来のように溶鋼浮上
堰を設置したりガスバブリングを実施することなく、プ
ラズマトーチから溶鋼への熱効率を増大させ、溶鋼を安
定して均一に温度を保つことができ、安定した繰業が可
能となるさらにこの電磁力による上向きの溶鋼流に１５
・・・電流、１６・
溶鋼浮上層、
・プラズマ
乗って、溶鋼的介在物が浮上し易くなって、モートーチ
の対極、
ルド内に持ち込まれる介在物も減少した。Table 3 [Effects of the Invention] As described above, the present invention installs a molten steel floating weir as in the conventional method by installing a molten steel stirring device using electromagnetic force in a continuous casting tundish having a plasma torch for heating molten steel. This increases the thermal efficiency from the plasma torch to the molten steel, and keeps the molten steel at a stable and uniform temperature without the need for gas bubbling or gas bubbling. 15 in molten steel flow
...Current, 16. Molten Steel Floating Layer, ・It became easier for molten steel inclusions to float on the plasma, and fewer inclusions were brought into the opposite electrode of the motor torch.
Claims (3)
ィッシュへ注入され、さらにタンディッシュからタンデ
ィッシュノズルを介してモールドへと注入される鋼の連
続鋳造方法において、前記取鍋ノズルとタンディッシュ
ノズルとの間に溶鋼を加熱するプラズマ加熱装置を配置
し、さらにプラズマ加熱装置の近傍に電磁力で溶鋼を攪
拌する溶鋼撹拌装置を配置することを特徴とする連続鋳
造用タンディッシュ。(1) In a continuous steel casting method in which molten steel is poured from a ladle through a ladle nozzle into a tundish, and from the tundish through a tundish nozzle and into a mold, the ladle nozzle and A tundish for continuous casting, characterized in that a plasma heating device for heating molten steel is arranged between the tundish nozzle and a molten steel stirring device for stirring the molten steel by electromagnetic force near the plasma heating device.
ター電磁コイルとすることを特徴とする請求項第１項記
載の連続鋳造用タンディッシュ。(2) The tundish for continuous casting according to claim 1, wherein the molten steel stirring device using electromagnetic force is an AC linear motor electromagnetic coil.
とを特徴とする請求項第１項記載の連続鋳造用タンディ
ッシュ。(3) The tundish for continuous casting according to claim 1, wherein the molten steel stirring device using electromagnetic force is an electromagnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20221090A JPH0489160A (en) | 1990-07-30 | 1990-07-30 | Tundish for continuous casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20221090A JPH0489160A (en) | 1990-07-30 | 1990-07-30 | Tundish for continuous casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0489160A true JPH0489160A (en) | 1992-03-23 |
Family
ID=16453786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20221090A Pending JPH0489160A (en) | 1990-07-30 | 1990-07-30 | Tundish for continuous casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0489160A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015110984A1 (en) * | 2014-01-22 | 2015-07-30 | Abb Technology Ltd. | Method and appartus to maintain a homogenized melt and controlled fields of a molten metal |
| WO2022199817A1 (en) * | 2021-03-25 | 2022-09-29 | Abb Schweiz Ag | Tundish for continuous casting |
-
1990
- 1990-07-30 JP JP20221090A patent/JPH0489160A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015110984A1 (en) * | 2014-01-22 | 2015-07-30 | Abb Technology Ltd. | Method and appartus to maintain a homogenized melt and controlled fields of a molten metal |
| WO2022199817A1 (en) * | 2021-03-25 | 2022-09-29 | Abb Schweiz Ag | Tundish for continuous casting |
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