JPS63309357A - Method for supplying molten metal in continuous casting of metal strip - Google Patents
Method for supplying molten metal in continuous casting of metal stripInfo
- Publication number
- JPS63309357A JPS63309357A JP14368387A JP14368387A JPS63309357A JP S63309357 A JPS63309357 A JP S63309357A JP 14368387 A JP14368387 A JP 14368387A JP 14368387 A JP14368387 A JP 14368387A JP S63309357 A JPS63309357 A JP S63309357A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- metal
- nozzle
- belts
- belt
- 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 63
- 238000000034 method Methods 0.000 title claims description 13
- 238000009749 continuous casting Methods 0.000 title claims description 8
- 238000001816 cooling Methods 0.000 claims description 3
- 230000005499 meniscus Effects 0.000 abstract description 9
- 230000007547 defect Effects 0.000 abstract description 5
- 230000005674 electromagnetic induction Effects 0.000 abstract description 3
- 230000014759 maintenance of location Effects 0.000 abstract 2
- 239000010409 thin film Substances 0.000 abstract 1
- 239000000498 cooling water Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000004804 winding Methods 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
- B22D11/114—Treating the molten metal by using agitating or vibrating means
- B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、一対のベルトと短辺鋳型との間に形成した湯
溜り部に注入された溶融金属から金属薄帯を連続的に製
造する際に、湯溜り部に溶融金属を円滑に供給する方法
に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention continuously manufactures a metal ribbon from molten metal poured into a pool formed between a pair of belts and a short side mold. In particular, the present invention relates to a method for smoothly supplying molten metal to a sump.
最近、溶鋼等の溶融金属から最終形状に近い数柵〜数十
伽程度の厚みをもつ金嘱薄帯を直接的に製造する連続鋳
造方法が注目を浴びている。この方法によるとき、従来
のような多段階にわたる圧延工程を省略することができ
るため、工程及び設備の簡略化が図られる。また、各工
程間で素材を加工温度に加熱する工程が本質的に不要と
なるため、省エネルギー効果も期待することができる。BACKGROUND ART Recently, a continuous casting method has been attracting attention, in which a metal ribbon having a thickness of several to several tens of meters close to the final shape is directly produced from molten metal such as molten steel. When this method is used, the conventional multi-step rolling process can be omitted, thereby simplifying the process and equipment. Furthermore, since the process of heating the material to the processing temperature between each process is essentially unnecessary, an energy saving effect can also be expected.
このような連続鋳造の一つに、ツインベルト方式第６図
は、このツインベルト式連続鋳造機の概略を示す図であ
る。この連続鋳造機においては、タンディッンユ１内の
溶融金属をノズル２から鋳造空間に供給する。この鋳造
空間は、プーリ３に掛は渡されて走行する鋼等の耐熱性
材料でできた一対のベルト４の相対する空隙の両側部を
短辺鋳型（図示せず）で仕切ることによって形成されて
いる。この鋳造空間に注湯された溶融金属は、冷却霞６
によって冷却凝固され、金属薄帯７となって１般出され
る。One type of continuous casting is the twin belt type. FIG. 6 is a diagram schematically showing a twin belt type continuous casting machine. In this continuous casting machine, molten metal in a dandying unit 1 is supplied from a nozzle 2 to a casting space. This casting space is formed by partitioning both sides of the opposing gap between a pair of belts 4 made of a heat-resistant material such as steel that run on a pulley 3 with short side molds (not shown). ing. The molten metal poured into this casting space is cooled by cooling haze 6.
The metal is cooled and solidified by the process, and then released as a metal ribbon 7 to the general public.
この湯溜り部に溶融金属を注入するノズル２として、特
開昭６０−１２２６４号公報では、湯溜り部の全面に溶
融金属を均一に供給するため、湯溜り部の形状に対応し
た偏平の水平断面をもつ浸漬ノズルが提案されている。In JP-A-60-12264, the nozzle 2 for injecting molten metal into this pool is a flat horizontal nozzle corresponding to the shape of the pool in order to uniformly supply molten metal to the entire surface of the pool. Submerged nozzles with cross-sections have been proposed.
この偏平なノズル２を湯溜り部に浸漬すると、ノズル２
とベルト４内面との間に僅かな隙間が細長く形成され、
この、隙間を介して溶融金属が外気と接触する。そして
、外気による冷却で、溶融金属がこの隙間で凝固し、薄
皮又は固体となって浮遊する。この薄皮又は固体がベル
ト４表面に生成する凝固シェルに巻き込まれると、二重
肌、肌荒れ等の表面欠陥やピンホール、材質の不均一化
等の内部欠陥が発生する原因となる。When this flat nozzle 2 is immersed in a hot water pool, the nozzle 2
A small elongated gap is formed between the belt 4 and the inner surface of the belt 4,
The molten metal comes into contact with the outside air through this gap. Then, when cooled by the outside air, the molten metal solidifies in this gap and floats as a thin crust or solid. When this thin skin or solid is caught in the coagulated shell generated on the surface of the belt 4, it causes surface defects such as double skin and rough skin, and internal defects such as pinholes and non-uniformity of the material.
また、この薄皮又は固体（巳よって、ノズル２から注入
された溶融金属が湯溜り部を不安定に流動することにな
り、金属薄帯７を製造するための冷却条件が撹乱される
。或いは、薄皮又は固体が生じないまでも、湯溜り部の
表面層が冷却されることから、ベルト４表面に生成する
凝固シェルの初期条件が乱され、金属薄帯７の製品形状
が劣ったものとなる。In addition, this thin skin or solid material causes the molten metal injected from the nozzle 2 to flow unstably through the pool, disturbing the cooling conditions for manufacturing the metal ribbon 7.Alternatively, Even if a thin skin or solid is not formed, the surface layer of the pool is cooled, which disturbs the initial conditions of the solidified shell that forms on the surface of the belt 4, resulting in an inferior product shape of the metal ribbon 7. .
そこで、本発明は、湯溜り部の表層にある溶融金属を強
制的に撹拌することにより、薄皮の生成や表層部の温度
低下を防止し、安定した条件下で優れた品質の金属薄帯
を製造することを目的とする。Therefore, the present invention forcibly stirs the molten metal on the surface layer of the pool, thereby preventing the formation of a thin layer and the temperature drop on the surface layer, and producing metal ribbon of excellent quality under stable conditions. The purpose is to manufacture.
本発明の溶融金属の供給方法は、その目的を達成するた
め、一対のベルト間に両端が短辺鋳型で仕切られた湯溜
り部に注入された溶融金属を冷却・凝固して金属薄帯を
製造する際、前記ベルトの裏面に配置した電磁力付与手
段によって、前記湯溜り部に注腸された溶融金属の表面
部を水平方向に流動させることを特徴とする。In order to achieve the purpose, the molten metal supply method of the present invention cools and solidifies the molten metal poured into a pool between a pair of belts, which is partitioned at both ends by short-side molds, thereby forming a thin metal strip. During manufacturing, the surface of the molten metal enemaed in the molten metal pool is caused to flow in a horizontal direction by means of an electromagnetic force applying means arranged on the back surface of the belt.
以下、図面を参照しながら、実施例により本発明の特徴
を具体的に説明する。Hereinafter, the features of the present invention will be specifically explained using examples with reference to the drawings.
第１図は本発明実施例において使用した装置の要部を示
す斜視図であり、第２図はその側面図である。なお、こ
れらの図において、第６図で示した部材等に対応するも
のについては、同一の符番で指示した。FIG. 1 is a perspective view showing the main parts of an apparatus used in an embodiment of the present invention, and FIG. 2 is a side view thereof. In addition, in these figures, parts corresponding to those shown in FIG. 6 are indicated by the same reference numerals.
ノズル２から湯溜り部８に注入された溶融金属のメニス
カス部９に対向する位置で、ベルト４の裏面に複数の電
磁コイル１０を配置する。そして、この電磁コイル１０
に付設されたコア１１を、ベルト４の裏面に臨ませる。A plurality of electromagnetic coils 10 are arranged on the back surface of the belt 4 at positions facing a meniscus section 9 of molten metal injected into a pool section 8 from a nozzle 2. And this electromagnetic coil 10
The core 11 attached to the belt 4 is made to face the back side of the belt 4.
本例におけるコア１１は、メニスカス部９のベルト４を
支持するディスクロール１２の各ディスク１３０間に挿
入されている。このディスクロール１２に対しては、第
２図に示したように、上方に配置されている冷却水噴射
ノズル１４から冷却水が噴射され、冷却水は各ディスク
１３の間をベルト４の裏面に沿って流下する。これによ
り、メニスカス部９にある溶融金属の抜熱が行われると
共に、熱衝撃からベルト４を保護することができる。こ
こで使用された冷却水は、コア１１をも冷却する。The core 11 in this example is inserted between each disk 130 of the disk roll 12 that supports the belt 4 of the meniscus portion 9. As shown in FIG. 2, cooling water is injected onto this disc roll 12 from a cooling water injection nozzle 14 located above, and the cooling water flows between each disc 13 onto the back surface of the belt 4. flowing down. Thereby, heat is removed from the molten metal in the meniscus portion 9, and the belt 4 can be protected from thermal shock. The cooling water used here also cools the core 11.
電磁コイル１０を付勢するとき、第３図の平面図に示す
ように、メニスカス部９にある溶融金属に水平方向の流
れＩ５が生じる。When the electromagnetic coil 10 is energized, a horizontal flow I5 is generated in the molten metal in the meniscus 9, as shown in the plan view of FIG.
第４図は、この水平方向の流れの発生過程を説明する図
である。すなわち、溶融金属を収容する湯溜り部８の両
側に、電磁誘導装置を対向配置する。この″ｒＬ磁誘導
装置は、電磁コイルｌＯにコア１１を１８回した単位を
交互に配置した構造をもっており、三相交流電源１６か
ら電流が供給される。ここで、コア１１に対する電磁コ
イルｌＯの巻き方は、それぞれの電磁コイル１０に図示
したような磁極が生じるようにされている。これにより
、磁界Ｂが矢印方向に発生し、磁束がＮ極から３極に流
れる。FIG. 4 is a diagram illustrating the process of generating this horizontal flow. That is, electromagnetic induction devices are disposed opposite to each other on both sides of the trough portion 8 that accommodates the molten metal. This "rL magnetic induction device has a structure in which units in which the core 11 is rotated 18 times around the electromagnetic coil lO are alternately arranged, and current is supplied from the three-phase AC power supply 16. The winding method is such that magnetic poles as shown are generated in each electromagnetic coil 10. As a result, a magnetic field B is generated in the direction of the arrow, and magnetic flux flows from the north pole to the three poles.
第４図に併せ示した曲線は、ある瞬間における冬場の合
成磁界を示すチャートである。ここで、三相交流電源１
６から電磁コイル１０に供給される電流が三相交流であ
るため、この合成磁界は、供給された電流の周波数に従
って、チャートにおいて矢印φて示したように移動する
。この移動磁界内におかれた溶融金属にフレミングの右
手の法則に従って誘導電流シが生じ、移動磁界との関係
において力Ｆを発生する。この力Ｆによって、湯溜り部
８内ｊごある溶融金寅は、力Ｆに沿った方向に流動する
。The curve shown in FIG. 4 is a chart showing the composite magnetic field in winter at a certain moment. Here, three-phase AC power supply 1
Since the current supplied from 6 to the electromagnetic coil 10 is a three-phase alternating current, this composite magnetic field moves as indicated by the arrow φ in the chart according to the frequency of the supplied current. An induced current F is generated in the molten metal placed within this moving magnetic field according to Fleming's right-hand rule, and a force F is generated in relation to the moving magnetic field. Due to this force F, the molten metal in the pool 8 flows in the direction along the force F.
この水平方向の流れ１５によって、湯溜り部８の湯面が
常に流動状態となり、ノズル２とベルト４との間の狭隘
な間隙に溶融金属が滞留することが防止される。したが
って、外気によって湯面が冷却されても、溶融金属が入
れ換わることから、メニスカス部９に薄皮が生じること
が防止される。Due to this horizontal flow 15, the surface of the molten metal in the sump 8 is always in a fluid state, and molten metal is prevented from staying in the narrow gap between the nozzle 2 and the belt 4. Therefore, even if the hot water surface is cooled by the outside air, the molten metal is replaced, and the formation of a thin skin in the meniscus portion 9 is prevented.
第５図は、間隔Ｄ＝５０ｍｍで対向させたベルト４の間
に厚みｄ＝３Ｑｍｍのノズル２を配置した湯溜り部８の
周囲に、コアピッチを５３＋ｎ＋ｎ、 コア積み厚さ
を５０市、コアルコツ間距離りを１００ ｍｍとした電
磁誘導装置を付設したときに、溶融金属に働く推力Ｐの
分布を示すグラフである。このとき、ノズル２とベルト
４との間に生じた水平方向の推力Ｐは、２０〜６０ａ＋
ｍＦｅであり、これによりその間隙を溶融金属は約０．
２〜０．８ ｍ ／秒の流速で流れた。In Fig. 5, a core pitch is 53+n+n, a core stacking thickness is 50 cities, and a core pitch is placed around a pool part 8 in which a nozzle 2 with a thickness d=3Qmm is arranged between belts 4 facing each other with an interval D=50mm. It is a graph showing the distribution of thrust force P acting on molten metal when an electromagnetic induction device with a distance of 100 mm is attached. At this time, the horizontal thrust P generated between the nozzle 2 and the belt 4 is 20 to 60a+
mFe, which allows the molten metal in the gap to be approximately 0.0 mFe.
It flowed at a flow rate of 2-0.8 m/s.
その結果、フラットノズルを使用して湯溜り邪８に注湯
するとき、これを湯溜り部８の溶融金属に浸漬すること
は従来困難であったものを、浸漬可能にした。そして、
注湯ノズルを浸漬形式としたことにより、湯溜り部８が
安定し、実用に足る品質をもつ金属薄帯７を製造するこ
とができた。As a result, when a flat nozzle is used to pour metal into the molten metal sump 8, it has been difficult to immerse it in the molten metal in the sump 8, but it has become possible to immerse it in the molten metal. and,
By using the pouring nozzle as an immersion type, the pool 8 was stabilized, and it was possible to manufacture the metal ribbon 7 with quality sufficient for practical use.
以上に説明したように、本発明においては、ベルト裏面
に設けた電磁力付与手段により、メニスカス部にある溶
融金属に水平方向の推力を与え、ノズルとベルト内面と
の間の細長い間隙に溶融金属が滞留することを防止して
いる。そのため、湯溜り部の湯面に薄皮が生成すること
がないので、この薄皮の巻込みに起因する表面欠陥や内
部欠陥のない金属薄帯を製造することが可能となる。ま
た、湯溜り部に対する溶融金属の供給も円滑に行われる
。このようにして、本発明によるとき、安定した条件下
で優れた品質の金属薄帯が製造される。As explained above, in the present invention, the electromagnetic force applying means provided on the back surface of the belt applies a horizontal thrust to the molten metal in the meniscus part, and the molten metal is applied to the elongated gap between the nozzle and the inner surface of the belt. This prevents stagnation. Therefore, a thin skin is not formed on the surface of the hot water in the pool, so it is possible to produce a metal ribbon free of surface defects and internal defects caused by the inclusion of the thin skin. In addition, the supply of molten metal to the molten metal reservoir is performed smoothly. In this way, according to the invention, metal ribbon of excellent quality is produced under stable conditions.
第１図は本発明の実施例において電磁力付与手段を装備
したツインベルト式連続鋳造装置の要部を示し、第２図
はその側面図、第３図は溶融金属に推力が働いている状
態を説明する図、第４図は溶融金属の流れの発生過程を
説明する図、第５図は溶融金属に働く推力の分布を示す
グラフである。
他方、第６図は、従来のツインベルト式連続鋳造装置を
示す。Fig. 1 shows the main parts of a twin-belt continuous casting machine equipped with an electromagnetic force applying means in an embodiment of the present invention, Fig. 2 is a side view thereof, and Fig. 3 shows a state in which thrust is acting on the molten metal. FIG. 4 is a diagram explaining the process of generating a flow of molten metal, and FIG. 5 is a graph showing the distribution of thrust acting on the molten metal. On the other hand, FIG. 6 shows a conventional twin belt type continuous casting apparatus.
Claims (1)
り部に注入された溶融金属を冷却・凝固して金属薄帯を
製造する際に、前記ベルトの裏面に配置した電磁力付与
手段によって、前記湯溜り部に注湯された溶融金属の表
面部を水平方向に流動させることを特徴とする金属薄帯
の連続鋳造における溶融金属の供給方法。1. When producing a metal ribbon by cooling and solidifying molten metal injected into a pool between a pair of belts, both ends of which are partitioned by short-side molds, electromagnetic force is provided on the back side of the belt. A method for supplying molten metal in continuous casting of metal ribbon, characterized in that the surface of the molten metal poured into the sump is made to flow in a horizontal direction by a means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14368387A JPS63309357A (en) | 1987-06-08 | 1987-06-08 | Method for supplying molten metal in continuous casting of metal strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14368387A JPS63309357A (en) | 1987-06-08 | 1987-06-08 | Method for supplying molten metal in continuous casting of metal strip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63309357A true JPS63309357A (en) | 1988-12-16 |
Family
ID=15344519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14368387A Pending JPS63309357A (en) | 1987-06-08 | 1987-06-08 | Method for supplying molten metal in continuous casting of metal strip |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63309357A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS609554A (en) * | 1983-06-29 | 1985-01-18 | Kawasaki Steel Corp | Continuous casting device of thin billet |
-
1987
- 1987-06-08 JP JP14368387A patent/JPS63309357A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS609554A (en) * | 1983-06-29 | 1985-01-18 | Kawasaki Steel Corp | Continuous casting device of thin billet |
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