JPS6339341B2 - - Google Patents
Info
- Publication number
- JPS6339341B2 JPS6339341B2 JP19868084A JP19868084A JPS6339341B2 JP S6339341 B2 JPS6339341 B2 JP S6339341B2 JP 19868084 A JP19868084 A JP 19868084A JP 19868084 A JP19868084 A JP 19868084A JP S6339341 B2 JPS6339341 B2 JP S6339341B2
- Authority
- JP
- Japan
- Prior art keywords
- molten steel
- belt
- tundish
- molten metal
- flow
- 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
- 229910052751 metal Inorganic materials 0.000 claims description 30
- 239000002184 metal Substances 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 21
- 238000009749 continuous casting Methods 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 description 73
- 239000010959 steel Substances 0.000 description 73
- 238000002347 injection Methods 0.000 description 17
- 239000007924 injection Substances 0.000 description 17
- 238000005266 casting Methods 0.000 description 11
- 230000037303 wrinkles Effects 0.000 description 6
- 238000007711 solidification Methods 0.000 description 5
- 230000008023 solidification Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910001152 Bi alloy Inorganic materials 0.000 description 1
- 206010062575 Muscle contracture Diseases 0.000 description 1
- 208000006111 contracture Diseases 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000001360 synchronised effect 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
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/064—Accessories therefor for supplying molten metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/116—Refining the metal
- B22D11/119—Refining the metal by filtering
Description
【発明の詳細な説明】
産業上の利用分野
この発明は、表面性状がすぐれかつ、非金属介
在物のない良質の鋳片、就中薄板を得るための、
単ベルト方式の連続鋳造における溶融金属の注入
方法に関する。[Detailed Description of the Invention] Industrial Field of Application This invention provides a method for obtaining high-quality slabs, especially thin plates, with excellent surface properties and no non-metallic inclusions.
This invention relates to a method for injecting molten metal in single-belt continuous casting.
従来の技術
従来、金属薄板たとえば薄鋼板を製造するに
は、鋼塊を分塊圧延して200〜250mm厚さのスラブ
を得、このスラブをホツトストリツプミルで熱間
圧延するか、或は溶鋼を連続鋳造してスラブを
得、これを熱間圧延するプロセスによつている。BACKGROUND TECHNOLOGY Conventionally, in order to produce a thin metal plate, such as a thin steel plate, a steel ingot is bloomed to obtain a slab with a thickness of 200 to 250 mm, and this slab is hot rolled in a hot strip mill, or The process involves continuous casting of molten steel to obtain a slab, which is then hot rolled.
しかしながら、これら従来技術によるときは、
大規模なホツトストリツプミルやスラブを加熱す
るエネルギを必要とする処から、薄板を溶鋼の連
続鋳造によつて直接的に得る技術の開発が望まれ
ている。 However, when using these conventional techniques,
It is desired to develop a technique for directly obtaining thin plates by continuous casting of molten steel in large-scale hot strip mills and places that require energy to heat slabs.
ところが従来、溶鋼を連続鋳造する場合、鋳型
内に溶鋼を注入し、断面内の周囲を凝固させた後
にこれを下方に引抜く方法が一般に行なわれてき
た。しかし、この方法では、
溶鋼を鋳型内に注入するノズルの径と鋳型断
面寸法の関係から、厚さ数十mm以下の鋳片を得
ることは困難である、
鋳片と鋳型内壁面間の摩擦のため、鋳片引抜
速度を２ｍ／min以上にあげることは困難であ
り、２ｍ／min以上にすると凝固殻が破断し溶
鋼流が噴出（ブレークアウト）する危険があ
る、
といつた問題があつた。 However, conventionally, when continuously casting molten steel, a method has generally been used in which the molten steel is injected into a mold, solidified around the cross section, and then pulled out downward. However, with this method, it is difficult to obtain slabs with a thickness of several tens of millimeters or less due to the relationship between the diameter of the nozzle through which molten steel is injected into the mold and the cross-sectional dimensions of the mold. Friction between the slab and the inner wall of the mold Therefore, it is difficult to increase the slab drawing speed to 2 m/min or more, and there is a risk that if it is increased to 2 m/min or more, there is a risk that the solidified shell will break and a flow of molten steel will blow out (breakout). Ta.
これら従来の連続鋳造プロセスにおける問題を
解決して薄板の連続鋳造による効率的な製造方法
およびそのための装置を提供すべく、本発明者等
は先に特願昭56−188862号（特開昭58−90357号）
において片面鋳造による金属薄板の製造方法およ
び装置を提案した。 In order to solve these problems in the conventional continuous casting process and provide an efficient manufacturing method and apparatus for continuous casting of thin plates, the present inventors previously filed Japanese Patent Application No. 56-188862 (Japanese Unexamined Patent Application Publication No. 58-188). −90357)
In this paper, we proposed a method and apparatus for manufacturing thin metal sheets by single-sided casting.
即ち、傾斜した無限軌道をなす平板上に溶鋼を
注ぎ薄鋼板を鋳造する方法であつて、鋳造方向と
注入溶鋼流の方向を逆に、つまり無限軌道をなす
平板が斜面を上方に向つて移動する状態下で溶鋼
を平板上に注ぎ、傾斜移動平板上における溶鋼
（溶融金属）流の下端が溶鋼の表面張力で自己保
持されるようにして連続鋳造する方法、ならび
に、駆動輪により駆動され無限軌道をなすととも
に傾斜した平面を有するベルト機構と、傾斜した
ベルト平面上に溶融金属を流下供給する手段と、
傾斜面上方側に鋳片を抽出する装置と、ベルトを
駆動輪を介して斜面上方向に駆動する装置とより
なる溶融金属の連続鋳造装置である。この装置を
第３図に示す。 In other words, it is a method of casting thin steel plates by pouring molten steel onto a flat plate forming an inclined endless track, with the casting direction and the direction of the flow of poured molten steel being reversed, that is, the flat plate forming an endless track moves upward on the slope. A method for continuous casting in which molten steel is poured onto a flat plate under conditions of a belt mechanism having an orbit and an inclined plane; a means for supplying molten metal down onto the inclined belt plane;
This is a continuous casting device for molten metal, which includes a device for extracting slabs above the slope, and a device for driving a belt upwards on the slope via a drive wheel. This device is shown in FIG.
第３図に於いて、１２は鋳造用ベルト或は無限
軌道であつて、矢印Ａの方向に駆動される。３１
はベルト駆動輪、６はタンデイシユ、７は溶鋼、
９は凝固シエルつまり鋳片である。 In FIG. 3, 12 is a casting belt or endless track, which is driven in the direction of arrow A. 31
is a belt drive wheel, 6 is a tundish, 7 is a molten steel,
9 is a solidified shell, that is, a slab.
而して、この装置によつて溶鋼を薄板に連続鋳
造するときは、溶鋼７がタンデイシユ６からベル
ト１２の表面上に流下供給され、重力によつて傾
斜しているベルト１２の表面上を一定距離流下し
て行く。ベルト１２は斜面を上方向（矢印Ａの方
向）に移動しているから、定常状態では溶鋼流先
端３３および後端３４はタンデイシユ６からの溶
鋼流下点１１からほぼ一定の相対位置にくる。 When molten steel is continuously cast into a thin plate using this device, the molten steel 7 is supplied flowing down from the tundish 6 onto the surface of the belt 12, and is kept constant on the surface of the belt 12 which is inclined by gravity. Flowing down the distance. Since the belt 12 is moving upward on the slope (in the direction of arrow A), in a steady state, the front end 33 and rear end 34 of the molten steel flow are at approximately constant relative positions from the point 11 of the molten steel flow from the tundish 6.
凝固シエルはベルト１２上の溶鋼流先端３３か
ら矢印Ａの方向に進むに従つて発達し、終には溶
鋼をくぐり出て完全凝固薄板となり、巻取装置に
よつて巻取られる。 The solidified shell develops as it advances in the direction of arrow A from the molten steel flow tip 33 on the belt 12, and eventually passes through the molten steel to become a completely solidified thin plate, which is wound up by a winding device.
この技術によつて、２〜20mm厚さの鋼板を連続
鋳造によつて製造することができる。この技術に
よれば、傾斜しその上方側へ移動する無限軌道平
面上で溶鋼（溶融金属）が凝固し、凝固シエル
（鋳片）の抽出速度と無限軌道平面（ベルト）の
移動速度を同期させれば、ベルト表面と鋳片間の
摩擦に起因するブレークアウトを生ずることがな
いから鋳造速度を飛躍的に高くすることができ
る。 With this technique, steel plates with a thickness of 2 to 20 mm can be manufactured by continuous casting. According to this technology, molten steel (molten metal) solidifies on a track plane that is inclined and moves upward, and the extraction speed of the solidified shell (slab) and the moving speed of the track plane (belt) are synchronized. In this case, breakout due to friction between the belt surface and the slab does not occur, and the casting speed can be dramatically increased.
また、片面凝固であるから、鋳造中鋳片の下面
はベルト表面に接しているが、上面は溶鋼または
雰囲気と接している状態で、鋳型のような空間を
制約するものがないからタンデイシユから溶鋼を
供給するノズル配置に問題を生ずることもない。 In addition, since it is one-sided solidification, the bottom surface of the slab is in contact with the belt surface during casting, but the top surface is in contact with the molten steel or the atmosphere, and since there is no space constraint such as a mold, the molten steel is transferred from the tundish to the tundish. There are no problems with the nozzle arrangement for supplying the water.
しかしながら、上に述べた鋳造による金属薄板
の製造プロセスにあつても、解決さるべき技術的
課題が存していた。 However, even in the above-mentioned process for manufacturing thin metal sheets by casting, there are still technical problems that need to be solved.
即ち、第３図に示したベルト平面上における溶
鋼流先端３３の位置は安定していなければならな
いし、かつ、ベルト幅方向に均一な溶鋼流先端平
面形状でなければならない。さもないときは、鋳
造によつて得られる薄板の下面に湯皺による模様
が形成され、薄板の表面性状を著しく損なう。 That is, the position of the molten steel flow tip 33 on the belt plane shown in FIG. 3 must be stable, and the molten steel flow tip must have a uniform planar shape in the belt width direction. Otherwise, a pattern due to hot water wrinkles will be formed on the lower surface of the thin sheet obtained by casting, which will significantly impair the surface quality of the thin sheet.
第４図および第５図に、ベルト平面上における
溶鋼流先端３３の平面形状を示す。 4 and 5 show the planar shape of the molten steel flow tip 33 on the belt plane.
ベルト平面上における溶鋼流先端３３は第４図
に示すような先端形状を呈しかつベルト移動方向
における位置も安定していることが鋳造製品の品
質上必要である。第５図に示すような凹凸の急激
な先端３３形状では、薄板の表面品質が不良とな
る。かかる観点から、発明者は特願昭58−30362
号（特開昭59−156554号公報）において、溶鋼流
先端３３の平面形状を第４図に示す如き、ベルト
幅方向に一様なものとすること、ならびに、溶鋼
流先端３３の位置を、ベルト移動方向において安
定せしめる手段を提供した。 It is necessary for the quality of the cast product that the molten steel flow tip 33 on the belt plane has a tip shape as shown in FIG. 4 and that its position in the belt movement direction is stable. If the tip 33 has a sharply uneven shape as shown in FIG. 5, the surface quality of the thin plate will be poor. From this perspective, the inventor has filed patent application No. 58-30362.
No. (Japanese Unexamined Patent Publication No. 59-156554), the planar shape of the molten steel flow tip 33 is made uniform in the belt width direction as shown in FIG. 4, and the position of the molten steel flow tip 33 is A means of stabilizing the belt in the direction of movement is provided.
即ち、ベルト平面上における溶鋼流先端３３
を、ベルト平面上に堰を設けることによつてベル
ト平面上の所望の位置、所望の平面形状に安定し
て維持せしめながら、連続鋳造するようにしたの
である。堰は断熱性の固体、または高温加熱した
固体または昇華性の固体、或はガス噴流によつて
形成される。 That is, the molten steel flow tip 33 on the belt plane
By providing a weir on the belt plane, continuous casting is performed while stably maintaining the desired position and desired planar shape on the belt plane. The weir is formed by an insulating solid, a heated solid or a sublimating solid, or a gas jet.
第２図にその一態様を示す。第２図において、
１２はベルト、１，２は堰部材、３はフレームで
ある。４はばねであつて堰部材１，２によつて形
成されるコーナー部をベルト１２表面に押圧・支
持する。５は支点であつて、堰部材１，２および
フレーム３によつて構成される堰は、この支点５
回りを回転する如く変位する。６はタンデイシ
ユ、７は溶鋼、８は溶鋼湯溜り、９は凝固シエル
である。 FIG. 2 shows one aspect of this. In Figure 2,
12 is a belt, 1 and 2 are weir members, and 3 is a frame. A spring 4 presses and supports the corner portion formed by the weir members 1 and 2 against the surface of the belt 12. 5 is a fulcrum, and the weir constituted by the weir members 1 and 2 and the frame 3 is attached to this fulcrum 5.
Displaces as if rotating. 6 is a tundish, 7 is a molten steel, 8 is a molten steel pool, and 9 is a solidification shell.
而して、この装置によつて溶鋼を薄板に連続鋳
造するときは、溶鋼７がタンデイシユ６からベル
ト１２の表面上に流下供給され、重力によつて、
傾斜しているベルト１２表面上を流下し、堰１，
２によつてせき止められていることから溶鋼湯溜
り８を形成する。凝固シエル９は、ベルト１２上
の堰コーナー部からベルト１２の動き（矢印Ａの
方向）に従つて発達していく。 When molten steel is continuously cast into a thin plate using this device, the molten steel 7 is supplied from the tundish 6 onto the surface of the belt 12, and by gravity,
It flows down on the surface of the belt 12 which is inclined, and the weir 1,
2, a molten steel pool 8 is formed. The solidified shell 9 develops from the weir corner on the belt 12 as the belt 12 moves (in the direction of arrow A).
第２図に示す装置は、上に述べた様に構成され
ているので、凝固開始点である溶鋼流先端を第４
図に示した如く制御することができる。このため
ベルト１２との接触面側に湯皺のない良好な表面
性状の鋳造薄板が得られる。 Since the apparatus shown in Fig. 2 is constructed as described above, the tip of the molten steel flow, which is the solidification start point, is
It can be controlled as shown in the figure. As a result, a cast thin plate with good surface quality and no creases on the side of the contact surface with the belt 12 can be obtained.
しかしながら、上に述べた装置による薄板の鋳
造においても、解決されるべき技術的課題が存し
ていた。即ち第２図に示したタンデイシユ６内の
溶鋼７をベルト１２表面上に供給する際に溶鋼流
下点１１での溶鋼注入流による落下衝撃を防止し
なければならない。さもないときは、堰コーナー
部から発達してきたベルト１２接触面側に湯皺の
ない表面性状の良好な凝固シエル９が、溶鋼流下
点１１で溶鋼注入流によつて完全に再溶解され、
溶鋼がベルト１２表面まで到達し、この時の溶鋼
注入流れの痕跡がそのままベルト１２接触面側の
湯皺として残り、薄板の表面性状を著しく損なう
という問題があつた。 However, even in the casting of thin plates using the above-mentioned apparatus, there were technical problems to be solved. That is, when the molten steel 7 in the tundish 6 shown in FIG. 2 is supplied onto the surface of the belt 12, it is necessary to prevent the falling impact caused by the molten steel injection flow at the molten steel flow down point 11. Otherwise, the solidified shell 9, which has developed from the weir corner and has a good surface quality without wrinkles on the contact surface side of the belt 12, is completely remelted by the molten steel injection flow at the molten steel flow point 11.
There was a problem in that the molten steel reached the surface of the belt 12, and the traces of the molten steel injection flow at this time remained as molten wrinkles on the contact surface side of the belt 12, significantly impairing the surface quality of the thin plate.
また、上に述べた先行技術においては、溶融金
属に含まれる非金属介在物を効果的に除去する手
段については、必ずしも充分ではなかつた。 Furthermore, in the prior art described above, means for effectively removing nonmetallic inclusions contained in molten metal were not necessarily sufficient.
発明が解決しようとする問題点
この発明は、上に述べた傾斜した無限軌道をな
す平板（ベルト）上に溶鋼を注ぎ、傾斜平板上方
向に鋳片を抽出するようにしたプロセスにおけ
る、タンデイシユからの溶鋼注入流による溶鋼流
下点での凝固シエルの再溶解に起因する鋳造製品
（薄板）の表面性状の劣化、さらには溶融金属の
注入に際し、溶融金属に含まれる非金属介在物の
効果的な除去手段を提供することを目的とする。Problems to be Solved by the Invention This invention solves the problem from the tundish in the process of pouring molten steel onto the flat plate (belt) forming the inclined endless track mentioned above and extracting slabs upward from the inclined flat plate. The surface quality of the cast product (thin plate) deteriorates due to the remelting of the solidified shell at the molten steel flow point due to the molten steel injection flow.Furthermore, when molten metal is injected, non-metallic inclusions contained in the molten metal are effectively removed. The purpose is to provide a means of removal.
問題点を解決するための手段
この発明の要旨とするところは、上向きに傾斜
して移動するベルト上に溶融金属を注ぎ、薄板を
鋳造する連続鋳造方法において、前記ベルト上の
湯溜り上部に位置するタンデイシユの溶湯注出口
に多孔質耐火物を設け、溶融金属を該多孔質耐火
物を通過せしめて前記湯溜り部に注入することを
特徴とする単ベルト方式の連続鋳造における溶融
金属の注入方法にある。Means for Solving the Problems The gist of the present invention is to provide a continuous casting method in which a thin plate is cast by pouring molten metal onto a belt that moves in an upwardly inclined manner, in which a tundish located above a pool on the belt is used. A method for injecting molten metal in single-belt continuous casting, characterized in that a porous refractory is provided at a molten metal spout, and the molten metal is passed through the porous refractory and injected into the sump. .
先に特願昭58−30362号で提案されたタンデイ
シユ内の溶鋼をベルト表面上に供給する注入方法
においては、堰コーナー部から発達してきたベル
ト接触面側に湯皺のない表面性状の良好な凝固シ
エルが、溶鋼流下点で注入流によつて、ベルト表
面に達するまで再溶解されることがあり、そこで
この発明においては、タンデイシユ内の溶鋼をベ
ルト表面上に供給する際の、注入流れによるシエ
ルの再溶解がベルト表面まで達しないよう、注入
流落下衝撃を防止せしめるようにした。 In the injection method previously proposed in Japanese Patent Application No. 58-30362, in which the molten steel in the tundish is supplied onto the belt surface, the belt contact surface, which has developed from the weir corner, has a good surface texture with no wrinkles. The solidified shell may be remelted by the injection flow at the point where the molten steel flows down until it reaches the belt surface. Therefore, in the present invention, when the molten steel in the tundish is supplied onto the belt surface, the injection flow In order to prevent the re-melting of the shell from reaching the belt surface, the impact of the injection stream falling was prevented.
その一実施態様を第１図に示す。第１図におい
て、１２はベルト、１，２は堰部材、３はフレー
ムである。４はばねであつて、堰部材１，２によ
つて形成されるコーナー部をベルト１２表面に押
圧・支持する。５は支点であつて、堰部材１，２
およびフレーム３によつて構成される堰は、この
支点５回りを回転する如く変位する。６はタンデ
イシユ、７は溶鋼、８は溶鋼湯溜り、９は凝固シ
エルである。１０は注入流落下衝撃を防止せしめ
る多孔質耐火物である。 One embodiment is shown in FIG. In FIG. 1, 12 is a belt, 1 and 2 are weir members, and 3 is a frame. A spring 4 presses and supports the corner portion formed by the weir members 1 and 2 against the surface of the belt 12. 5 is a fulcrum, and the weir members 1 and 2
The weir constituted by the frame 3 is displaced so as to rotate around the fulcrum 5. 6 is a tundish, 7 is a molten steel, 8 is a molten steel pool, and 9 is a solidification shell. Reference numeral 10 is a porous refractory material that prevents the impact of the injection stream from falling.
この装置によつて溶鋼を薄板に連続鋳造すると
きは、溶鋼７がタンデイシユ６からベルト１２表
面上に供給される際に、多孔質耐火物１０を通る
ため、溶鋼の速度エネルギーが吸収され、溶鋼流
下点１１での溶鋼注入流は非常にゆるやかな速度
となり、かつベルト１２幅方向に均一になる。こ
のため堰１，２コーナー部から発達してきたベル
ト接触面側に湯皺のない表面性状の良好な凝固シ
エルは、若干は再溶解されるが、ベルト表面に達
するまでには到らず、湯皺のない表面性状の良好
な鋳片が得られる。 When molten steel is continuously cast into a thin plate using this device, when the molten steel 7 is supplied from the tundish 6 onto the surface of the belt 12, it passes through the porous refractory 10, so the velocity energy of the molten steel is absorbed, and the molten steel passes through the porous refractory 10. The molten steel injection flow at the downstream point 11 has a very slow speed and is uniform in the width direction of the belt 12. For this reason, the solidified shell that has developed from the weir 1 and 2 corners and has a good surface quality with no wrinkles on the belt contact surface is remelted to some extent, but it does not reach the belt surface. A slab with good surface quality and no wrinkles can be obtained.
尚、溶鋼流下点での溶鋼注入流速度は、多孔質
耐火物のメツシユの大小、および厚みによつて決
定される。つまり注入流速度をゆるやかにしたい
場合は、多孔質耐火物はメツシユの小さな物を選
択するか、あるいは厚みの厚い物を選択する。 The molten steel injection flow rate at the molten steel flow point is determined by the size and thickness of the porous refractory mesh. In other words, if you want to slow down the injection flow rate, choose a porous refractory with a small mesh or a thick one.
また多孔質耐火物の材質を、MgO、ZrO2、
CaOなどにすれば、溶鋼が通過する際に介在物
Al2O3が耐火物表面に付着したり、耐火物と化合
したりするため、溶鋼内介在物の除去をも兼ねる
ことができる。 In addition, the material of the porous refractory is MgO, ZrO 2 ,
If you use CaO, etc., inclusions will form when molten steel passes through.
Since Al 2 O 3 adheres to the surface of the refractory or combines with the refractory, it can also serve to remove inclusions in molten steel.
尚、上記説明は溶鋼から薄鋼板を連続鋳造する
場合について行なつてきたが、この発明は溶鋼の
連続鋳造に限るものではなく、鋼以外の金属の連
続鋳造にも適用されうるものであることは勿論で
ある。 Although the above explanation has been made regarding continuous casting of thin steel plates from molten steel, this invention is not limited to continuous casting of molten steel, but can also be applied to continuous casting of metals other than steel. Of course.
実施例 １
第１図に示したタンデイシユ６の多孔質耐火物
１０として、材質がアルミナ、メツシユが10、形
状が20mmt×40mml×60mmwのものを用いて溶融金属
（フユーズドメタル；Sn、Pb、Bi合金）を注入し
た。Example 1 As the porous refractory 10 of the tundish 6 shown in FIG . , Pb, Bi alloy).
このときタンデイシユノズル出口での溶融金属
流れを観察すると、多孔質耐火物全面から溶融金
属が流出し、均一注入が可能であつた。次いで、
溶融金属として溶鋼を用いて、フユーズドメタル
の場合と同様に注入した。タンデイシユノズル出
口での溶鋼流れを観察すると、フユーズドメタル
の場合と同様に多孔質耐火物全面から溶鋼が流出
し、均一注入が可能であつた。 At this time, when observing the flow of molten metal at the outlet of the tundish nozzle, it was found that the molten metal flowed out from the entire surface of the porous refractory, and uniform injection was possible. Then,
Molten steel was used as the molten metal and injected in the same manner as in the case of fused metal. Observing the flow of molten steel at the outlet of the tundish nozzle, it was found that molten steel flowed out from the entire surface of the porous refractory, as in the case of fused metal, and uniform injection was possible.
比較のために第２図に示したタンデイシユ６
（ノズル幅：70mm、ノズル長さ：200mm）で溶融金
属フユーズドメタルを注入したところ、ノズル出
口での溶融金属流れは幅≒30mm程度になり、縮流
が発生し、均一注入は不可能であつた。 Tundish 6 shown in Figure 2 for comparison
(nozzle width: 70 mm, nozzle length: 200 mm), when molten metal was injected, the molten metal flow at the nozzle outlet was approximately 30 mm in width, causing contracture flow and making uniform injection impossible. It was hot.
発明の効果
この発明は以上詳述したように溶融金属から薄
板を連続鋳造するに際し、溶融金属注入流による
凝固シエルの再溶解に起因する鋳造薄板の表面性
状の劣化を防ぎ、表面性状のすぐれた、介在物の
少ない金属薄板の製造を可能にする。Effects of the Invention As detailed above, this invention prevents the deterioration of the surface quality of the cast thin plate caused by the remelting of the solidified shell by the molten metal injection flow when continuously casting a thin plate from molten metal, and improves the surface quality. , making it possible to manufacture thin metal sheets with fewer inclusions.
第１図は本発明方法を説明する立面図、第２図
は従来の装置を用いて溶鋼を注入する一実施例を
説明する立面図、第３図は連続鋳造プロセスを説
明する立面図、第４図および第５図は第３図に示
すプロセスにおける注入流先端部の平面形状を示
す平面図である。
１，２……堰部材、３……フレーム、４……ば
ね、５……支点、６……タンデイシユ、７……溶
鋼、８……溶鋼湯溜り、９……凝固シエル、１０
……多孔質耐火物、１１……溶鋼流下点、１２…
…ベルト、３１……鋳型駆動輪、３２……巻取装
置、３３，３３′……溶鋼先端、３４……溶鋼後
端。
Figure 1 is an elevation view explaining the method of the present invention, Figure 2 is an elevation view explaining an example of injecting molten steel using a conventional device, and Figure 3 is an elevation view explaining the continuous casting process. 4 and 5 are plan views showing the planar shape of the injection flow tip in the process shown in FIG. 3. 1, 2... Weir member, 3... Frame, 4... Spring, 5... Fulcrum, 6... Tundishyu, 7... Molten steel, 8... Molten steel pool, 9... Solidification shell, 10
... Porous refractory, 11 ... Molten steel flow point, 12 ...
... Belt, 31 ... Mold drive wheel, 32 ... Winding device, 33, 33' ... Molten steel tip, 34 ... Molten steel rear end.
Claims (1)
属を注ぎ、薄板を鋳造する連続鋳造方法におい
て、前記ベルト上の湯溜り上部に位置するタンデ
イシユの溶湯注出口に多孔質耐火物を設け、溶融
金属を該多孔質耐火物を通過せしめて前記湯溜り
部に注入することを特徴とする単ベルト方式の連
続鋳造における溶融金属の注入方法。1 In a continuous casting method in which a thin plate is cast by pouring molten metal onto a belt that moves upwardly inclining, a porous refractory is provided at the molten metal spout of a tundish located above the tundish on the belt, and the molten metal is poured onto the belt. A method for injecting molten metal in single-belt continuous casting, characterized in that the molten metal is passed through a porous refractory and injected into the sump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19868084A JPS6178538A (en) | 1984-09-25 | 1984-09-25 | Method for uniform pouring of molten metal to prevent falling impact and to remove inclusion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19868084A JPS6178538A (en) | 1984-09-25 | 1984-09-25 | Method for uniform pouring of molten metal to prevent falling impact and to remove inclusion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6178538A JPS6178538A (en) | 1986-04-22 |
| JPS6339341B2 true JPS6339341B2 (en) | 1988-08-04 |
Family
ID=16395259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19868084A Granted JPS6178538A (en) | 1984-09-25 | 1984-09-25 | Method for uniform pouring of molten metal to prevent falling impact and to remove inclusion |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6178538A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1296505C (en) * | 1987-05-06 | 1992-03-03 | R. Guthrie Research Associates Inc. | Continuous casting of thin metal strip |
| US4828012A (en) * | 1988-04-08 | 1989-05-09 | National Aluminum Corporation | Apparatus for and process of direct casting of metal strip |
-
1984
- 1984-09-25 JP JP19868084A patent/JPS6178538A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6178538A (en) | 1986-04-22 |
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