JPS62270256A - Molten metal pouring method for belt type continuous casting machine - Google Patents
Molten metal pouring method for belt type continuous casting machineInfo
- Publication number
- JPS62270256A JPS62270256A JP11377186A JP11377186A JPS62270256A JP S62270256 A JPS62270256 A JP S62270256A JP 11377186 A JP11377186 A JP 11377186A JP 11377186 A JP11377186 A JP 11377186A JP S62270256 A JPS62270256 A JP S62270256A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- casting
- side mold
- belt
- short side
- 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 52
- 238000009749 continuous casting Methods 0.000 title claims description 8
- 238000000034 method Methods 0.000 title claims description 4
- 238000005266 casting Methods 0.000 claims abstract description 16
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000007654 immersion Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007423 decrease 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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0605—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two belts, e.g. Hazelett-process
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
Description
【発明の詳細な説明】
３、発明の詳細な説明
（産業上の利用分野）
本発明は、ベルト式連鋳機の金属ベルトの熱変形を防止
して、広幅の鋳片をブレークアウトなく鋳造することに
関するものである。Detailed Description of the Invention 3. Detailed Description of the Invention (Field of Industrial Application) The present invention prevents thermal deformation of the metal belt of a belt-type continuous casting machine and casts wide slabs without breakout. It's about doing.
（従来の技術）
薄鋳片連続鋳造機としては、第１図に示すようなベルト
式連鋳機が知られている。このベルト式連鋳機は、一対
の輪回移動する金属ヘルド３と金属ベルトの側縁近傍で
金属ベルトと緊密に接する一対の先細り状の短辺鋳型で
鋳造空間を形成しており、金属ベルトの裏面に設けられ
た冷却装置４から冷却水を流すことにより金属ベルトを
冷却している。溶湯は第２図に示すスライディングノズ
ルあるいは第３図に示すストッパーにより流量を制御し
つつ、所定の場面レベルになるようにタンディツシュ１
から＞３ ’／ＩＩノズル２を介して、上記鋳造空間内
に注入される。注入された溶湯は金属ベルトにより冷却
されて凝固し、金属ベルトと同期して下方へ連続的に引
き抜かれる。(Prior Art) As a continuous thin slab casting machine, a belt type continuous casting machine as shown in FIG. 1 is known. This belt-type continuous casting machine has a casting space formed by a pair of metal healds 3 that rotate in rotation and a pair of tapered short-side molds that are in close contact with the metal belt near the side edges of the metal belt. The metal belt is cooled by flowing cooling water from a cooling device 4 provided on the back side. The flow rate of the molten metal is controlled by the sliding nozzle shown in Fig. 2 or the stopper shown in Fig. 3, and the molten metal is poured into the tundish 1 at a predetermined level.
>3'/II through the nozzle 2 into the casting space. The injected molten metal is cooled and solidified by the metal belt, and is continuously drawn downward in synchronization with the metal belt.
（発明が解決しようとする問題点）
しかし、前述したベルト式連鋳機により幅の広い鋳片を
鋳造しようとする場合、浸漬ノズルから最も遠い短辺鋳
型の近傍では溶湯が淀む。また、第６図に示すように溶
湯の温度は浸漬ノズルからの距離と密接な関係があり、
浸漬ノズルからの距離が太き（なる程溶湯の温度が下が
る。このため、幅の広い鋳片を鋳造する際、浸漬ノズル
から最も離れた短辺鋳型壁で溶湯が凝固し、第４図に示
すようなりサビ状の凝固シェルが形成される。このクサ
ビ状の凝固シェルが形成されると拘束性ブレークアウト
等のトラブルが生じる。(Problems to be Solved by the Invention) However, when attempting to cast a wide slab using the belt-type continuous casting machine described above, the molten metal stagnates near the short side mold that is farthest from the immersion nozzle. Furthermore, as shown in Figure 6, the temperature of the molten metal is closely related to the distance from the immersion nozzle.
The distance from the immersion nozzle is large (as is true, the temperature of the molten metal decreases. Therefore, when casting a wide slab, the molten metal solidifies on the short mold wall farthest from the immersion nozzle, as shown in Figure 4). As shown, a rust-shaped solidified shell is formed. When this wedge-shaped solidified shell is formed, problems such as restraint breakout occur.
また、単位時間あたりの溶湯吐出量と金属ベルトの熱負
荷とは密接な関係があり、第５図に示すように単位時間
あたりの溶湯吐出量が増大すると金属ベルトの熱変形が
増大し鋳造が困難となり、ひどい場合には金属ベルトが
溶損してブレークアウトに至る。このために、浸漬ノズ
ルからの溶湯吐出量を増大させることができなかった。Furthermore, there is a close relationship between the amount of molten metal discharged per unit time and the thermal load on the metal belt, and as shown in Figure 5, as the amount of molten metal discharged per unit time increases, the thermal deformation of the metal belt increases and casting becomes difficult. In severe cases, the metal belt may melt and break out. For this reason, it has not been possible to increase the amount of molten metal discharged from the immersion nozzle.
本発明の目的は、幅の広い鋳片を鋳造する場合に問題と
なる短辺鋳型近傍における溶湯の凝固を防止し、溶湯吐
出量を増大したときに問題となる金属ベルトの熱変形を
防止することである。The purpose of the present invention is to prevent solidification of molten metal near the short side mold, which is a problem when casting wide slabs, and to prevent thermal deformation of a metal belt, which is a problem when the amount of molten metal discharged is increased. That's true.
（問題点を解決するための手段）
前述した問題点を解決するために、複数の浸漬ノズルで
溶湯を注入することを本発明の特徴としたベルト式連鋳
機の溶湯注入方法である二即ち、第７ａ図に示すように
タンディツシュ１内の溶湯５を複数の浸漬ノズル２を介
して、第７ｂ図に示す金属ベルト３と短辺鋳型１０とで
構成される鋳造空間内に注入するものである。(Means for Solving the Problems) In order to solve the above-mentioned problems, the second method of pouring molten metal into a belt-type continuous casting machine is characterized in that the molten metal is injected using a plurality of immersed nozzles. As shown in Fig. 7a, the molten metal 5 in the tundish 1 is injected through a plurality of immersion nozzles 2 into a casting space constituted by a metal belt 3 and a short side mold 10 as shown in Fig. 7b. be.
なお、鋳型内の場面レベルは、例えば渦電流式またはマ
イクロ波式の場面レベルセンサーで検出し、検出された
場面レベルが目標値から外れた場合には、スライディン
グノズルの開度あるいはストッパーの上方方向のストロ
ークを調整して目標の場面レベルになるように流量を制
御する。流量を制御する手段であるスライディングノズ
ルとしては、第８図に示すように三層のプレートの中間
プレート６を２本の浸漬ノズル２に対して共用とし、中
間プレート６をシリンダ７で駆動し、２本の浸漬ノズル
２の注入量を同時に制御するスライディングノズルが採
用できる。あるいは他のスライディングノズルとしては
、第９図に示すような三層のプレートの中間プレート６
をシリンダ７により別々に駆動して、注入量を制御する
スライディングノズルも採用できる。The scene level inside the mold is detected by, for example, an eddy current type or microwave type scene level sensor, and if the detected scene level deviates from the target value, the opening level of the sliding nozzle or the upward direction of the stopper is detected. The flow rate is controlled by adjusting the stroke to reach the target scene level. As a sliding nozzle which is a means for controlling the flow rate, as shown in FIG. 8, an intermediate plate 6 of a three-layer plate is shared by two immersion nozzles 2, and the intermediate plate 6 is driven by a cylinder 7. A sliding nozzle that simultaneously controls the injection amount of two immersion nozzles 2 can be used. Alternatively, as another sliding nozzle, an intermediate plate 6 of a three-layer plate as shown in FIG.
It is also possible to adopt a sliding nozzle in which the injection amount is controlled by separately driving the cylinders 7.
以上述べた流量制御手段は三層式スライディングノズル
の場合であるが、二層式スライディングノズルも同様で
あり、ストッパーも採用できる。The flow rate control means described above is for a three-layer sliding nozzle, but the same applies to a two-layer sliding nozzle, and a stopper can also be employed.
（作 用）
本発明は、金属ベルトと短辺鋳型とで構成される鋳造空
間内に複数の浸漬ノズルで溶湯を注入するので、浸漬ノ
ズルと短辺鋳型との距離を小さくできる。したがって、
広幅の鋳片を鋳造する場合でも短辺鋳型近傍の溶湯温度
を高く保持できるので、短辺鋳型近傍にクサビ状の凝固
シェルが形成されなくなり、第１０図に示すように拘束
性ブレークアウトによる操業トラブルが少なくなる。(Function) The present invention uses a plurality of immersion nozzles to inject molten metal into the casting space constituted by the metal belt and the short-side mold, so the distance between the immersion nozzle and the short-side mold can be reduced. therefore,
Even when casting wide slabs, the temperature of the molten metal near the short-side mold can be maintained high, which prevents the formation of a wedge-shaped solidified shell near the short-side mold, resulting in a restricted breakout operation as shown in Figure 10. There will be fewer troubles.
また、複数の浸漬ノズルより溶湯を注入し、浸漬ノズル
１本当りの溶湯吐出量を少なくすると、凝固界面の溶鋼
流速が小さくなるので溶鋼と凝固シェル間の熱伝達が小
さくなり、ベルトの熱負荷が緩和されるので金属ベルト
の熱変形がなくなり、第１０図に示すように金属ベルト
の熱変形による操業上のトラブルが少なくなる。In addition, if molten metal is injected from multiple immersed nozzles and the amount of molten metal discharged from each immersed nozzle is reduced, the flow velocity of the molten steel at the solidification interface will be reduced, which will reduce the heat transfer between the molten steel and the solidified shell, resulting in a thermal load on the belt. This reduces thermal deformation of the metal belt, and as shown in FIG. 10, operational troubles due to thermal deformation of the metal belt are reduced.
（発明の効果）
以上発明したように本発明の方法によれば、従来のよう
に１木の浸漬ノズルでは鋳造困難とされていた広幅の鋳
片の鋳造が可能となる。また、溶湯の吐出量を多くした
場合でも金属ベルトの熱変形がなくなり、安定した鋳造
が可能となる。(Effects of the Invention) As described above, according to the method of the present invention, it becomes possible to cast a wide slab, which was conventionally difficult to cast using a single-piece submerged nozzle. Further, even when the amount of molten metal discharged is increased, thermal deformation of the metal belt is eliminated, and stable casting is possible.
第１図はベルト式連鋳機を示す図であり、第２図および
第３図は流量制御をするためのスライディングノズルと
ストッパーを示す図である。
第４図は拘束性ブレークアウトを示す図であり、第５図
は金属ベルトの熱歪みとノズルからの吐出量との関係を
示す図であり、
第６図は鋳造中と短辺鋳型近傍の溶湯温度との関係を示
す図である。
第７ａ図は複数の浸漬ノズルで注入している状態を示す
図であり、
第７ｂ図は第７ａ図のＡ−Ａ視図である。
第８図は共用のプレートを同時に摺動させるスライディ
ングノズルであり、
第９図はプレートを個々に摺動させるスライディングノ
ズルである。
第１０図は本発明の効果を示す図である。
１・・・タンディツシュ ２・・・浸ン貞ノズル３・
・・金属ベルト ４・・・金属ベルト冷却装置５
・・・溶湯
６・・・スライディングノズルの中間プレート７１０．
シリンダ ８・・・ストッパ９・・・凝固シ
ェルFIG. 1 is a diagram showing a belt type continuous casting machine, and FIGS. 2 and 3 are diagrams showing a sliding nozzle and a stopper for controlling the flow rate. Figure 4 is a diagram showing restraint breakout, Figure 5 is a diagram showing the relationship between the thermal strain of the metal belt and the discharge amount from the nozzle, and Figure 6 is a diagram showing the relationship between the thermal strain of the metal belt and the discharge amount from the nozzle. It is a figure showing the relationship with molten metal temperature. Fig. 7a is a diagram showing a state in which a plurality of submerged nozzles are injecting, and Fig. 7b is a view taken along line AA in Fig. 7a. FIG. 8 shows a sliding nozzle that slides shared plates simultaneously, and FIG. 9 shows a sliding nozzle that slides plates individually. FIG. 10 is a diagram showing the effects of the present invention. 1... Tanditshu 2... Immersion nozzle 3.
...Metal belt 4...Metal belt cooling device 5
...Molten metal 6...Sliding nozzle intermediate plate 710.
Cylinder 8... Stopper 9... Solidified shell
Claims (1)
対の金属ベルトとこの金属ベルトの側縁近傍で金属ベル
トと緊密に接している一対の短辺鋳型で構成される鋳型
で鋳造するにあたり、複数の浸漬ノズルで溶湯を注入す
ることを特徴とするベルト式連鋳機の溶湯注入方法。1. When casting with a mold consisting of a pair of metal belts that move circularly while holding the molten metal and solidified shell, and a pair of short-sided molds that are in close contact with the metal belt near the side edges of this metal belt, multiple A method for injecting molten metal into a belt-type continuous casting machine, which is characterized by injecting molten metal with a submerged nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11377186A JPS62270256A (en) | 1986-05-20 | 1986-05-20 | Molten metal pouring method for belt type continuous casting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11377186A JPS62270256A (en) | 1986-05-20 | 1986-05-20 | Molten metal pouring method for belt type continuous casting machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62270256A true JPS62270256A (en) | 1987-11-24 |
Family
ID=14620715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11377186A Pending JPS62270256A (en) | 1986-05-20 | 1986-05-20 | Molten metal pouring method for belt type continuous casting machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62270256A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01293942A (en) * | 1988-05-20 | 1989-11-27 | Nippon Steel Corp | Method for continuously casting wide width thin slab and casting machine thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59189045A (en) * | 1983-04-12 | 1984-10-26 | Kawasaki Steel Corp | Continuous casting machine for thin walled billet |
-
1986
- 1986-05-20 JP JP11377186A patent/JPS62270256A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59189045A (en) * | 1983-04-12 | 1984-10-26 | Kawasaki Steel Corp | Continuous casting machine for thin walled billet |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01293942A (en) * | 1988-05-20 | 1989-11-27 | Nippon Steel Corp | Method for continuously casting wide width thin slab and casting machine thereof |
| JPH0512061B2 (en) * | 1988-05-20 | 1993-02-17 | Nippon Steel Corp |
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