JPH06297099A - Float type molten metal distributing device for continuous casting metal - Google Patents
Float type molten metal distributing device for continuous casting metalInfo
- Publication number
- JPH06297099A JPH06297099A JP11391593A JP11391593A JPH06297099A JP H06297099 A JPH06297099 A JP H06297099A JP 11391593 A JP11391593 A JP 11391593A JP 11391593 A JP11391593 A JP 11391593A JP H06297099 A JPH06297099 A JP H06297099A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- float
- continuous casting
- ingot
- mold
- 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.)
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は金属の竪型連続鋳造装置
用の浮子式溶湯分配装置に関し、さらに詳しくはアルミ
ニウム及びその合金を上下開放鋳型により鋳造する、所
謂ＤＣ鋳造に用いる浮子式溶湯分配装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a float type molten metal distributor for a vertical vertical metal casting machine, and more particularly to a float type molten metal distributor used for so-called DC casting, in which aluminum and its alloy are cast by upper and lower open molds. Regarding the device.
【０００２】[0002]
【従来の技術】非鉄金属特にアルミニウム及びその合金
の圧延、押出、鍛造用の鋳塊は大部分が連続鋳造法、特
に竪型連続鋳造法により製造されている。この方法の一
つは所謂ＤＣ鋳造と呼ばれるもので、上下開放鋳型内に
その上部の出湯ノズルから溶湯を供給し、鋳型内の溶湯
上に配した浮子式の溶湯分配装置により出湯量を制御し
つつ、鋳型内壁から抜熱することで凝固殻を形成し、さ
らに鋳型下部から冷却剤を噴射しつつ鋳塊を引き出すこ
とで完全に凝固させる鋳造法である。Most of the ingots for rolling, extrusion and forging of non-ferrous metals, especially aluminum and its alloys, are manufactured by a continuous casting method, especially a vertical continuous casting method. One of the methods is so-called DC casting, in which molten metal is supplied into the upper and lower open molds from the upper discharge nozzle, and the amount of molten metal is controlled by a float type molten metal distributor placed on the molten metal in the mold. Meanwhile, it is a casting method in which the solidified shell is formed by removing heat from the inner wall of the mold, and the ingot is pulled out while injecting the coolant from the lower part of the mold to completely solidify.
【０００３】この方法の欠点は、鋳型内溶湯の表面や出
湯ノズル等で生成した酸化物が、鋳塊の表面や時として
鋳塊内部に混入することである。このような酸化物の混
入は鋳塊品質を劣化させるばかりてなく、鋳塊に割れを
発生させる起点となる。そしてこのような欠点は、酸化
反応を生じやすいＡｌ−Ｍｇ系合金及び鋳造割れが生じ
やすいＡｌ−Ｃｕ系やＡｌ−Ｚｎ−Ｍｇ系合金において
顕著である。さらに非常に酸化反応を生じやすく且つ鋳
造割れも生じやすいＡｌ−Ｌｉ系合金において最も顕著
である。The disadvantage of this method is that the oxides formed on the surface of the molten metal in the mold or on the tap nozzle are mixed into the surface of the ingot and sometimes the inside of the ingot. The inclusion of such an oxide not only deteriorates the quality of the ingot, but also becomes a starting point for cracking the ingot. And such a defect is remarkable in the Al-Mg-based alloy that easily causes an oxidation reaction and the Al-Cu-based or Al-Zn-Mg-based alloy that easily causes casting cracks. Further, it is most prominent in an Al-Li alloy which is very likely to cause an oxidation reaction and also easily causes casting cracks.
【０００４】[0004]
【発明が解決しようとする課題】本発明の目的は、生成
した酸化物が鋳塊の表面や内部に混入することを防止
し、健全且つ高品質の鋳塊を製造するための浮子式溶湯
分配装置を提供することである。DISCLOSURE OF THE INVENTION An object of the present invention is to prevent the generated oxide from being mixed into the surface or the inside of the ingot, and to produce a sound and high-quality ingot by the float type molten metal distribution. It is to provide a device.
【０００５】[0005]
【課題を解決するための手段】酸化物が鋳塊の表面や内
部に混入することを防止するためには、そもそも溶湯の
酸化反応を防止することにより、酸化物の生成を抑制す
ればよいことは明らかである。しかしながらアルミニウ
ム合金、特にＡｌ−Ｌｉ合金は極めて反応性が高く、酸
化反応を完全に抑制することは事実上不可能であり、特
に鋳造開始時に初期の溶湯と共に鋳塊内に流入する酸化
物を根絶することは困難である。[Means for Solving the Problems] In order to prevent the oxide from being mixed into the surface or the inside of the ingot, it is necessary to prevent the oxidation reaction of the molten metal in the first place to suppress the formation of the oxide. Is clear. However, aluminum alloys, especially Al-Li alloys, are extremely reactive, and it is virtually impossible to completely suppress the oxidation reaction. In particular, at the start of casting, the oxide that flows into the ingot together with the initial molten metal is eradicated. Is difficult to do.
【０００６】このため残された手段は、生成した酸化物
の鋳塊への混入を阻止することである。本発明者らは酸
化物の比重が溶湯のそれより小さく、従って酸化物が溶
湯表面に浮上することに着目した。即ち鋳型内の溶湯表
面に浮上している酸化物が、鋳塊側面に混入していく前
にせき止めれば、鋳塊品質の劣化や鋳塊の割れは防止さ
れることになる。しかしながら酸化物をせき止めるため
の特別な機構を設けることは、鋳型内の限られた空間に
設置するために小さな装置でなくてはならず、さらに熟
練を必要とする鋳造作業をさらに煩雑且つ困難なものに
しかねない。The measure left for this is to prevent the oxides formed from entering the ingot. The present inventors have noted that the specific gravity of the oxide is smaller than that of the molten metal, and thus the oxide floats on the surface of the molten metal. That is, if the oxide floating on the surface of the molten metal in the mold is dammed before mixing into the side surface of the ingot, deterioration of the ingot quality and cracking of the ingot can be prevented. However, providing a special mechanism for damming the oxide must be a small device in order to install it in the limited space in the mold, and the casting work that requires more skill is more complicated and difficult. It can be something.
【０００７】種々の検討の過程で、鋳造作業に先だって
ＤＣ鋳型内に設置される浮子式溶湯分配装置に、酸化物
をせき止める機能を付加させることが可能であることを
見いだした。即ち下記のように酸化物せき止め機能は、
浮子式溶湯分配装置の浮子部分に酸化物せき止め用の空
間を設けることだけで達せられるため、構造が極めて単
純で且つ余分な装置の付加もなく、鋳造作業も通常の場
合と何ら変わることなく、さらにこの方法によればＤＣ
鋳造設備自体の改造は全く不要である。In the course of various investigations, it was discovered that it is possible to add a function of damaging oxides to a float type molten metal dispenser installed in a DC mold prior to casting work. That is, the oxide dampening function is as follows:
Since it can be achieved only by providing a space for stopping oxides in the float part of the float type molten metal distributor, the structure is extremely simple and no additional device is added, and the casting operation is not different from the usual case. Furthermore, according to this method, DC
No modification of the casting equipment itself is required.
【０００８】即ち、本発明の浮子式溶湯分配装置は、上
下開放鋳型内に上端部に設けた出湯ノズルから溶湯を供
給し、該鋳型下端から連続的に鋳塊を引き出す連続鋳造
装置の上記溶湯上面部に浮遊し、上記出湯ノズルを囲む
浮子部と、該浮子部と一体で出湯ノズルの下方に位置し
て溶湯上面の上下動に伴ない出湯ノズルを開閉する出湯
量制御部とからなる浮子式溶湯分配装置において、浮子
部に溶湯上面部内に侵入する空間部を設けたことを特徴
とするものであり、この際空間部の上面が閉じているの
は有効であり、また浮子部の外周縁部を下方に突設する
のも効果がある。That is, the float type molten metal distributor of the present invention supplies the molten metal from the molten metal nozzle provided at the upper end of the upper and lower open molds, and continuously draws the ingot from the lower end of the mold. A float including a float part that floats on the upper surface part and surrounds the tapping nozzle, and a tapping amount control part that is located below the tapping nozzle integrally with the float part and that opens and closes the tapping nozzle when the top surface of the melt moves up and down. In the molten metal dispenser, the float is provided with a space that penetrates into the upper surface of the melt. At this time, it is effective that the upper surface of the space is closed, and It is also effective to project the peripheral portion downward.
【０００９】[0009]
【作用】以下図面に沿って説明する。Ａｌ合金等の竪型
連続鋳造装置の従来例を図４に示す。図のように溶湯
（11）は出湯ノズル（１）を通って上下開放鋳型（２）
に供給される。冷却剤は図示しない冷却剤供給管を通っ
て鋳型（２）内の冷却剤室（３）に導かれ、さらにスリ
ット（４）を通って鋳塊（５）に噴射され、鋳塊（５）
は下方に引き出される。The operation will be described below with reference to the drawings. FIG. 4 shows a conventional example of a vertical continuous casting apparatus for an Al alloy or the like. As shown in the figure, the molten metal (11) passes through the tap nozzle (1) and opens in the upper and lower molds (2).
Is supplied to. The coolant is guided to a coolant chamber (3) in the mold (2) through a coolant supply pipe (not shown), further injected through a slit (4) into the ingot (5), and the ingot (5).
Is drawn downwards.
【００１０】この際、鋳塊（５）の引き出し量と同量の
溶湯が供給される必要があるが、これは下記の浮子式溶
湯分配装置（６）により自動的に制御される。即ち浮子
式溶湯分配装置（６）は、溶湯より低比重で常に溶湯表
面に浮上している浮子部（７）と、出湯ノズル（１）下
端に配される出湯量制御部（８）から形成される。At this time, it is necessary to supply the same amount of molten metal as the withdrawal amount of the ingot (5), but this is automatically controlled by the float type molten metal distributor (6) described below. That is, the float type molten metal distributor (6) is composed of a floating portion (7) which has a lower specific gravity than the molten metal and which is always floating on the surface of the molten metal, and a molten metal amount control unit (8) which is arranged at the lower end of the molten metal nozzle (1). To be done.
【００１１】そしてもし溶湯供給量が鋳塊引き出し量よ
り多くなると、鋳型内の溶湯面（９）が上昇するが、浮
子部（７）も上昇し従って出湯量制御部（８）も上昇す
るため、出湯ノズル（１）下端を塞ぐようになり、出湯
量が減少する。逆に溶湯供給量が鋳塊引き出し量より少
なくなると、鋳型内の溶湯面（９）が下降するが、浮子
部（７）も下降し従って出湯量制御部（８）も下降する
ため、出湯ノズル（１）下端の流動抵抗が少なくなり、
出湯量が増加する。実際には溶湯面（９）はある位置で
安定し、殆ど上下動することなく出湯量と鋳塊引き出し
量とがバランスする。If the amount of the molten metal supplied exceeds the amount of the ingot drawn, the molten metal surface (9) in the mold rises, but the float (7) also rises and the molten metal discharge amount control unit (8) also rises. The lower end of the hot water discharge nozzle (1) is closed, and the hot water discharge amount is reduced. On the contrary, when the molten metal supply amount becomes smaller than the ingot drawing amount, the molten metal surface (9) in the mold lowers, but the float portion (7) also lowers and the molten metal amount control unit (8) also lowers. (1) The flow resistance at the lower end is reduced,
The amount of tap water increases. Actually, the molten metal surface (9) is stable at a certain position, and the amount of molten metal and the amount of drawn ingot are balanced with almost no vertical movement.
【００１２】この従来装置の欠点は、出湯ノズル
（１）、溶湯面（９）等で生成した酸化物が、鋳塊の表
面や時として鋳塊内部に混入することである。The disadvantage of this conventional apparatus is that the oxides generated at the tapping nozzle (1), the molten metal surface (9), etc. are mixed in the surface of the ingot and sometimes inside the ingot.
【００１３】そこで本発明では図１に示すように浮子式
溶湯分配装置（６）の浮子部（７）に酸化物捕捉用空間
（10）を設けたものである。これにより出湯ノズル
（１）下端から流出する溶湯は、その大部分が酸化物捕
捉用空間（10）の下方を通過するが、その際酸化物は酸
化物捕捉用空間（10）内に浮上し、せき止められるため
鋳塊内に混入することはない。また鋳型内の溶湯面
（９）で発生し混入する可能性のある酸化物は、浮子部
（７）外側の鋳型との僅かな隙間のもののみであり、こ
の部分の酸化物は発生しても、薄い酸化膜程度の時点で
順次鋳塊の表面に巻き込まれていくため、品質上全く問
題はない。Therefore, in the present invention, as shown in FIG. 1, an oxide trapping space (10) is provided in the float portion (7) of the float type molten metal distributor (6). As a result, most of the molten metal flowing out from the bottom end of the hot water discharge nozzle (1) passes below the oxide capturing space (10), at which time the oxide floats up in the oxide capturing space (10). Since it is dammed, it will not be mixed in the ingot. Further, the oxides that may be generated and mixed in on the molten metal surface (9) in the mold are only those with a slight gap between the mold and the outside of the float (7). However, there is no problem in terms of quality, because the surface of the ingot is successively rolled up at the time of the thin oxide film.
【００１４】また図２は連続鋳造状態における本発明に
係る装置の他の例の断面図である。本装置は酸化物捕捉
用空間（10）の上部が閉塞されており、従って溶湯が外
気と接する面積が小さいため、酸化防止効果が高い。FIG. 2 is a sectional view of another example of the apparatus according to the present invention in the continuous casting state. In this device, the upper portion of the oxide capturing space (10) is closed, and therefore, the area where the molten metal comes into contact with the outside air is small, so that the antioxidation effect is high.
【００１５】また図３は連続鋳造状態における本発明に
係る装置のさらに他の例の断面図である。本装置は酸化
物捕捉用空間（10）を囲む外周縁部が溶湯内に深く侵入
しており、従って酸化物が多い場合でも酸化物のせき止
め効果が高い。FIG. 3 is a sectional view of still another example of the apparatus according to the present invention in the continuous casting state. In this device, the outer peripheral edge part surrounding the oxide capturing space (10) penetrates deeply into the molten metal, and therefore, even when the amount of oxide is large, the effect of stopping oxides is high.
【００１６】[0016]
【実施例】図１〜図３に示す本発明の浮子式溶湯分配装
置及び図４に示す従来の浮子式溶湯分配装置を用いて、
表１に示す条件にて、 150mm×350mm のサイズのAA8090
合金を鋳造した。なお表１の寸法の欄におけるＡ及びＢ
は図５の溶湯分配装置（６）の平面図に示すように該装
置の平面的な外寸法を示し、ａ及びｂは本発明溶湯分配
装置における酸化物捕捉用空間（10）の平面的な内寸法
を示している。上記AA8090合金はＬｉをおよそ 2.5％含
み、極めて酸化性が強いため、溶湯表面にＡｒガスを吹
き付け酸化を抑制しつつ鋳造した。そして鋳造後の鋳塊
について表面状態と内部組織とを調べその結果を表２に
示した。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Using the float type molten metal distributor of the present invention shown in FIGS. 1 to 3 and the conventional float type molten metal distributor shown in FIG.
Under the conditions shown in Table 1, 150mm x 350mm size AA8090
The alloy was cast. A and B in the dimension column of Table 1
5 shows the external dimensions of the molten metal distributor (6) as shown in the plan view of FIG. 5, and a and b are the planar dimensions of the oxide trapping space (10) in the molten metal distributor of the present invention. The internal dimensions are shown. Since the above AA8090 alloy contains approximately 2.5% of Li and has an extremely strong oxidizing property, it was cast while suppressing the oxidation by blowing Ar gas onto the surface of the molten metal. The surface state and internal structure of the ingot after casting were examined, and the results are shown in Table 2.
【００１７】[0017]
【表１】 [Table 1]
【００１８】[0018]
【表２】 [Table 2]
【００１９】表２に示したように本発明の装置によれば
健全な鋳塊を製造できたのに対し、比較装置では酸化物
が鋳型と鋳塊の隙間に入り込んで湯漏れが生じ、鋳塊製
造自体が不可能であった。As shown in Table 2, according to the apparatus of the present invention, a sound ingot can be produced. On the other hand, in the comparative apparatus, the oxide enters the gap between the mold and the ingot to cause leakage of molten metal. The mass production itself was impossible.
【００２０】[0020]
【発明の効果】本発明によれば酸化性の強い溶湯であっ
ても、健全な鋳塊が製造でき、且つ装置構造が極めて単
純で且つ余分な装置の付加もなく、さらに鋳造作業自体
は従来と何ら変わることはない。また本発明によれば従
来のＤＣ鋳造設備自体の改造は全く不要である。なお本
発明は実施例に示した装置に限定されものではなく、同
様な思想のいかなる装置にも適用されるものである。EFFECTS OF THE INVENTION According to the present invention, a sound ingot can be produced even with a molten metal having a strong oxidizing property, the apparatus structure is extremely simple and no extra equipment is added. There is no difference with. Further, according to the present invention, it is not necessary to modify the conventional DC casting equipment itself. The present invention is not limited to the device shown in the embodiment, but can be applied to any device having a similar idea.
【図１】本発明の一実施例を示す説明図である。FIG. 1 is an explanatory diagram showing an embodiment of the present invention.
【図２】本発明の他の実施例を示す説明図である。FIG. 2 is an explanatory diagram showing another embodiment of the present invention.
【図３】本発明のさらに他の例を示す説明図である。FIG. 3 is an explanatory diagram showing still another example of the present invention.
【図４】従来例を示す説明図である。FIG. 4 is an explanatory diagram showing a conventional example.
【図５】本発明装置の一例の平面図である。FIG. 5 is a plan view of an example of the device of the present invention.
１ 出湯ノズル ２ 上下開放鋳型 ３ 冷却剤室 ４ スリット ５ 鋳塊 ６ 浮子式溶湯分配装置 ７ 浮子部 ８ 出湯量制御部 ９ 鋳型内溶湯面 10 酸化物捕捉用空間 11 溶湯 1 Hot Water Nozzle 2 Vertical Open Mold 3 Coolant Chamber 4 Slit 5 Ingot 6 Float Type Molten Metal Distributor 7 Float Part 8 Hot Metal Amount Control Section 9 Molten Metal Surface 10 Oxide Capture Space 11 Molten Metal
Claims (3)
ズルから溶湯を供給し、該鋳型下端から連続的に鋳塊を
引き出す連続鋳造装置の上記溶湯上面部に浮遊し、上記
出湯ノズルを囲む浮子部と、該浮子部と一体で出湯ノズ
ルの下方に位置して溶湯上面の上下動に伴ない出湯ノズ
ルを開閉する出湯量制御部とからなる浮子式溶湯分配装
置において、浮子部に溶湯上面部内に侵入する空間部を
設けたことを特徴とする金属の連続鋳造用浮子式溶湯分
配装置。1. A molten metal is supplied from a molten metal discharge nozzle provided at the upper end of an upper and lower open mold, and is floated on the molten metal upper surface of a continuous casting device for continuously drawing ingots from the lower end of the mold. In a float-type molten metal distribution device, a float-type molten metal distribution device comprising a surrounding float part and a melt discharge amount control part which is located below the melt discharge nozzle integrally with the float part and which opens and closes the melt discharge nozzle as the melt moves up and down. A float type molten metal distributor for continuous casting of metal, characterized in that a space is provided to penetrate into the upper surface.
の浮子式溶湯分配装置。2. The float type molten metal distributor according to claim 1, wherein the upper surface of the space is closed.
請求項１又は２記載の浮子式溶湯分配装置。3. The float type molten metal distributor according to claim 1, wherein an outer peripheral edge portion of the float portion is provided so as to project downward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05113915A JP3115152B2 (en) | 1993-04-16 | 1993-04-16 | Float type molten metal distribution device for continuous casting of metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05113915A JP3115152B2 (en) | 1993-04-16 | 1993-04-16 | Float type molten metal distribution device for continuous casting of metal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06297099A true JPH06297099A (en) | 1994-10-25 |
| JP3115152B2 JP3115152B2 (en) | 2000-12-04 |
Family
ID=14624384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05113915A Expired - Lifetime JP3115152B2 (en) | 1993-04-16 | 1993-04-16 | Float type molten metal distribution device for continuous casting of metal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3115152B2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109562443A (en) * | 2016-07-08 | 2019-04-02 | 株式会社Posco | Casting buoying device and the casting method for using it |
| CN112296286A (en) * | 2020-11-03 | 2021-02-02 | 万恩同 | Structure of partition board for continuous casting of molten steel |
-
1993
- 1993-04-16 JP JP05113915A patent/JP3115152B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109562443A (en) * | 2016-07-08 | 2019-04-02 | 株式会社Posco | Casting buoying device and the casting method for using it |
| CN112296286A (en) * | 2020-11-03 | 2021-02-02 | 万恩同 | Structure of partition board for continuous casting of molten steel |
| CN112296286B (en) * | 2020-11-03 | 2022-06-07 | 万恩同 | Structure of partition board for continuous casting of molten steel |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3115152B2 (en) | 2000-12-04 |
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