JPS606251A - Molten metal supply method - Google Patents
Molten metal supply methodInfo
- Publication number
- JPS606251A JPS606251A JP59112878A JP11287884A JPS606251A JP S606251 A JPS606251 A JP S606251A JP 59112878 A JP59112878 A JP 59112878A JP 11287884 A JP11287884 A JP 11287884A JP S606251 A JPS606251 A JP S606251A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- molten metal
- mold
- air
- 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
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
- B22D11/0645—Sealing means for the nozzle between the travelling surfaces
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明は鋳造機のロール、モールド、はルト等の間の間
隙内にノズル又はノズル口金内の通路を経て溶融金属を
供給する方法並びに供給ノズルに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for feeding molten metal through a passage in a nozzle or nozzle mouth into a gap between rolls, molds, flutes, etc. of a casting machine, and to a feeding nozzle.
従来の技術
連続鋳造特に鉄及び非鉄金属の鋳造に際しての最も困難
な問題点の一つは、２個のロール又はキャタピラ−トラ
ック型モールド等のモールド間隙内に溶融金属を導入す
る 供給ノズルである。キャタピラ−トラック型モール
ドを使用する連続鋳造機では薄いストリップ、例えば２
０市厚さのストリップを鋳造する。即ち、ノズルのノズ
ル口金部分は比較的小さな寸法とする必要がある。BACKGROUND OF THE INVENTION One of the most difficult problems in continuous casting, particularly in the casting of ferrous and nonferrous metals, is the feed nozzle that introduces molten metal into the mold gap, such as a two-roll or caterpillar-track mold. Continuous casting machines using caterpillar track molds produce thin strips, e.g.
Cast a strip with a thickness of 0. That is, the nozzle cap portion of the nozzle needs to be relatively small in size.
ノズルを流れる金属は極めて高温であるため大きな危険
がある。この金属内で腐食又は分解に耐える材料は少な
い。この要求を満足する材料としてグラハイドがある。The metal flowing through the nozzle is extremely hot and poses a great danger. Few materials resist corrosion or decomposition within this metal. Grahyde is a material that satisfies this requirement.
しかしグラハイドの欠点は高い熱伝達率であり、このた
め溶融金属から熱を急速に奪ってノズル内で凝固させる
傾向がある。However, the drawback of graphide is its high heat transfer rate, which tends to rapidly remove heat from the molten metal and cause it to solidify in the nozzle.
他の耐火材料として珪藻土即ち微小セルの形状としたは
ｙ純粋のシリカ３０％、長アスにストファイバー３０％
、珪酸ナトリウム乾燥混合物２０％、チョーク即ち珪酸
カルシウム２０％の混合物がある。Other refractory materials include diatomaceous earth, which has a microcell shape, is 30% pure silica, and 30% fiber in the form of long holes.
, 20% sodium silicate dry mixture, and 20% chalk or calcium silicate mixture.
このノズルはアルミニウム鋳造用に広く使用される。鋼
の鋳造用としては、ＺｒＯ２又はｚｒｓ ｉ○４のノズ
ルが使用される。This nozzle is widely used for aluminum casting. For casting steel, ZrO2 or Zrs i○4 nozzles are used.
ノズルは鋳造金属の高温による熱応力に耐えろ必要があ
る。同時に、モールド又はロールの揺動運動による機械
的応力、内部を流れる浴融物の比較的大きな重量による
ノズルの曲りに耐える必要がある。曲りが生ずればノズ
ル口金とロール又はモールド壁との間の摩擦、ノズルの
破損を生ずる。The nozzle must be able to withstand the thermal stress caused by the high temperatures of the cast metal. At the same time, it is necessary to withstand mechanical stresses due to rocking movements of the mold or rolls and bending of the nozzle due to the relatively large weight of the bath melt flowing inside. If bending occurs, friction between the nozzle cap and the roll or mold wall and damage to the nozzle will occur.
スイス特許ＣＨ−ＰＳ ５０８４３３号に示す供給ノズ
ルは口金外縁附近全周に自己潤滑性材料製のインサート
を有する。インサートは口金面から僅かに突出し、ノズ
ル面とモールド面との間の直接接触を防ぎ、溶融金属が
口金とモールド面との間の小さな間隙に流入するのを防
ぐ。しかし実施上グラハイドインサートの摩擦痕は活性
化ストリップを形成して早い凝固と不均等構造とを来し
、表面亀裂を生ずることがある。ノズル特に口金に生ず
る機械的負荷の結果として生ずる上述の欠点を防ぐ提案
としてスイス特許出願３０１０／８３ではノズル本体と
ロール、モールド等との距離を鋳造間に調整する。例え
ばノズル本体に空気通路を設けてノズル又はノズル口金
とロール、モールド、又はベルトとの間のスペースに開
口する。空気通路に導入した空気は流体力学パラドック
スを形成し、ノズルの口金がロール、モールド又はベル
トに接触するのを防ぐ。The feed nozzle shown in Swiss patent CH-PS 508433 has an insert made of a self-lubricating material around the entire circumference near the outer edge of the mouthpiece. The insert protrudes slightly from the die surface, preventing direct contact between the nozzle surface and the mold surface, and preventing molten metal from flowing into the small gap between the die and mold surface. However, in practice, the friction marks on the graphide inserts can form activated strips leading to rapid solidification and uneven structure, resulting in surface cracks. As a proposal to prevent the above-mentioned drawbacks which arise as a result of the mechanical loads occurring on the nozzle, in particular on the mouthpiece, Swiss Patent Application 3010/83 proposes adjusting the distance between the nozzle body and the rolls, molds, etc. during casting. For example, air passages may be provided in the nozzle body and open into the space between the nozzle or nozzle cap and the roll, mold, or belt. The air introduced into the air passage creates a hydrodynamic paradox and prevents the nozzle base from contacting the roll, mold or belt.
他の問題点はノズルでの逆流である。ノズルから流出し
た金属はノズル出口とロール、モールド等の可動壁との
第１の接触点との間に曲率半径を形成し、この半径は金
属の表面張力とノズルを出ろ金属の金属静圧と鋳造機の
モールドの運動速度との関数となる。金属の過早凝固に
よってバリアーが形成され、金属はノズルの口金の後方
に逆流する。これが生じた時は鋳造の連続性を妨害し、
ノズル口金と鋳造機の共働を妨げろ。Another problem is backflow at the nozzle. The metal flowing out of the nozzle forms a radius of curvature between the nozzle exit and the first point of contact with the movable wall of a roll, mold, etc., and this radius is determined by the surface tension of the metal, the static pressure of the metal exiting the nozzle, It is a function of the speed of movement of the mold of the casting machine. Pre-solidification of the metal creates a barrier that causes the metal to flow back to the back of the nozzle mouth. When this occurs, it disrupts the continuity of the casting and
Prevent the nozzle cap and casting machine from working together.
本発明は前述の方法とノズルとを提供し、ノズルにおけ
ろ金属の逆流を防ぎ、ノズルとモールド壁との間の接触
を防ぐ。The present invention provides the aforementioned method and nozzle to prevent metal backflow in the nozzle and to prevent contact between the nozzle and the mold wall.
本発明によって、ノズル又はノズル口金とロール、モー
ルド、ベルト等との間のスペースに空気クッションを形
成し、この空気クッションによってノズル口金出口とロ
ール、モールド、ベルト等との溶融金属の接触点との間
の溶融金属の曲率半径に影響させる。上述の流体力学パ
ラドックスによる利点も、上述のノズル逆流を防ぐ利点
に組合せて得られろ。According to the present invention, an air cushion is formed in the space between the nozzle or nozzle cap and the roll, mold, belt, etc., and the air cushion forms a contact point of the molten metal between the nozzle cap outlet and the roll, mold, belt, etc. Affects the radius of curvature of the molten metal between. The benefits of the hydrodynamic paradox described above may also be obtained in combination with the benefits of preventing nozzle backflow described above.
上述の方法を実施するための本発明によるノズルは、上
下壁に空気通路を設ける。空気通路はノズル又はノズル
口金とロール、モールド、ベルト等との間のスヘー５７
に開口する。空気クツ７ヨンの圧力は、金属静圧と特定
表面張力の下にノズル口金を出る溶融金属の形成する曲
率半径に作用して半径を変える。The nozzle according to the invention for carrying out the method described above is provided with air passages in the upper and lower walls. The air passage is located between the nozzle or nozzle cap and the roll, mold, belt, etc.
Open to. The pressure of the air shoe acts on the radius of curvature formed by the molten metal exiting the nozzle mouth under static metal pressure and a certain surface tension.
ノズルが金属支持部材との組合せ構造であれば、空気通
路は金属支持部材に形成する。If the nozzle has a combination structure with a metal support member, the air passage is formed in the metal support member.
作用
ノズル口金の出（］を出ろ溶融金属の圧力Ｐ■、、１；
はベルヌーイの法則によって静圧と動圧とによって定ま
り、曲率半径Ｒはσ／Ｐｍａｔとなる。σは金属の表面
張力である。空気クッションによって対向圧力Ｐが生ず
るため溶融金属の曲率半径Ｒ＝σ／ （Ｐｍｅｔ −Ｐ
）となる。これによってノズルとロール、モールド、
ハルト等との間隔を犬にしても金属が逆流することはな
い。更に、ノズルがロール、モールド、ベルト等と接触
することはない。Working Pressure of molten metal exiting the nozzle mouth ( ) P■, 1;
is determined by static pressure and dynamic pressure according to Bernoulli's law, and the radius of curvature R is σ/Pmat. σ is the surface tension of the metal. Since a counter pressure P is generated by the air cushion, the radius of curvature of the molten metal R = σ/ (Pmet - P
). This allows the nozzle, roll, mold,
Even if the distance between Haruto and others is increased, the metal will not flow back. Furthermore, the nozzle does not come into contact with rolls, molds, belts, etc.
更に、空気クツ／コンによって溶融金属はロール、モー
ルド等と接触する前に冷却を開始するため冷却は促進さ
れろ。Additionally, cooling is facilitated by the air pumps, which begin cooling the molten metal before contacting the rolls, molds, etc.
空気クッションのためには空気チャンネルに不活性ガス
を導入することが望ましい。アルゴンは好適であり、ノ
ズルを出た溶融金属の酸化を防ぐ。For air cushions it is desirable to introduce an inert gas into the air channels. Argon is preferred and prevents oxidation of the molten metal exiting the nozzle.
実施例
本発明を例示とした実施例並びに図面について説明する
。Embodiments Examples and drawings illustrating the present invention will be described.
図は本発明によるノズル口金１を、図示しないキャタピ
ラ−トラック型モールドの２個の可動モールドベルト２
．３間の作動位置とした状態を示て。ノズル口金１は上
部ノズル壁４と下部ノズル壁５を有し、両壁間の通路６
は溶融金属７を通す。The figure shows a nozzle base 1 according to the present invention, and two movable mold belts 2 of a caterpillar track type mold (not shown).
．． Show the operating position between 3 and 3. The nozzle base 1 has an upper nozzle wall 4 and a lower nozzle wall 5, with a passage 6 between the two walls.
passes the molten metal 7.
溶融金属７は出口８からノズル口金１を出て両モールド
ベルト２．３間に導入され、低温のモールド８壁９．１
０に接触する。この冷却によって、溶融金属は外面から
モールド壁に接触し、短時間後に凝固して金属層１１を
形成する。The molten metal 7 exits the nozzle cap 1 through an outlet 8 and is introduced between both mold belts 2.3, and is introduced into the cold mold 8 wall 9.1.
Touch 0. Due to this cooling, the molten metal contacts the mold wall from the outside and solidifies after a short time to form the metal layer 11.
溶融金属７が壁９．１０に接触する位置１２はベルト２
．３の速度と、溶融金属７の流出速度と、溶融金属の表
面張力とに応じて出口８から遠く又は近くなる。通常は
ベルト２．３の運動速度は一定であり、溶融金属７の流
出速度は金属静圧Ｐｍ ａ ｔに応じて変化する！出口
８と接触点１２との間の弧γは表面張力σど″金属静圧
Ｐｍｅｔによって定まる。The position 12 where the molten metal 7 contacts the wall 9.10 is located on the belt 2.
．． 3, the outflow velocity of the molten metal 7, and the surface tension of the molten metal. Normally, the movement speed of the belt 2.3 is constant, and the outflow speed of the molten metal 7 changes depending on the metal static pressure Pm a t! The arc γ between the outlet 8 and the contact point 12 is determined by the surface tension σ and the metal static pressure Pmet.
ノズルの壁４．５に本発明による空気通路１４乞設け、
出口１５はモールド壁９．１２と口金１との間のスパー
スＪに開口する。スば一スＪに入った空気は空気クッシ
ョンを形成し、曲率半径γに影響する。曲率半径は表面
張力σと、金属静圧Ｐｍ ｅ ｔと空気クッション圧力
Ｐとの差の比即ちσ／ （Ｐｍｅｉ−Ｐ）によって定ま
る。The wall 4.5 of the nozzle is provided with an air passage 14 according to the invention;
The outlet 15 opens into the sparse J between the mold wall 9.12 and the base 1. The air entering the bath J forms an air cushion and influences the radius of curvature γ. The radius of curvature is determined by the surface tension σ and the ratio of the difference between the metal static pressure Pmet and the air cushion pressure P, ie, σ/(Pmei−P).
発明の効果
ノズル口金からモールド壁に向けて空気を吹出すことに
よって空気クッションを形成し、ノズルとモールド壁と
の接触を防ぐと共に溶融金属の逆流を防ぐ。Effects of the Invention By blowing air from the nozzle mouth toward the mold wall, an air cushion is formed, preventing contact between the nozzle and the mold wall, and preventing backflow of molten metal.
図は連続鋳造機の本発明によるノズルとキャタピラ−ト
ラック型モールドの一部を示す断面図である。
符号の説明
１・・・ノズル口金 ２．３・・・可動モールドベルト
４．５・・・ノズル壁 ６・・・溶融金属通路８．１５
・・・出口 ９．１０・・・モールド壁 １２・・・接
触点１４・・・空気通路The figure is a sectional view showing part of a nozzle and a caterpillar track type mold according to the invention of a continuous casting machine. Explanation of symbols 1... Nozzle cap 2.3... Movable mold belt 4.5... Nozzle wall 6... Molten metal passage 8.15
...Outlet 9.10...Mold wall 12...Contact point 14...Air passage
Claims (1)
に、ノズル又はノズル口金内の通路を経て溶融金属を供
給する方法であって、ロール、モールド、ベルト等とノ
ズル又はノズル口金との間に空気クツクヨンを形成し、
空気クッションによってノズル口金の出口とロール、モ
ールド、ベルト等の溶融金属接触点との間に形成される
溶融金属の曲率半径に影響させることを特徴とする溶融
金属供給方法。 ２、前記空気クッションが流体力学パラドックスとして
作用し、これによってノズル口金がロール、モールド、
ベルト等から所定距離に保持される特許請求の範囲第１
項記載の方法。 ３、 鋳造機のロール、モールド、ベルト等の間の間隙
内に少な（とも１本の通路を経て溶融金属を供給するノ
ズルであって、上下ノズル壁（４，５）に設けてノズル
又はノズル口金（１）とモールド（２，３）、ベルト等
の壁との間のスペース（Ｊ′）に開口し、上記ス投−ス
内に圧力（乃の空気クッションを形成させろ空気通路を
備えることを特徴とする溶融金属供給ノズル。 ４、 前記空気クンンヨンの圧力（Ｄによってノズル口
金（１）を流出し金属静圧（Ｐｍｅｔ） 表面張力（の
を有する溶融金属（７）が出口（８）とモールド壁（９
，１０）との接触点（１２）との間に形成する曲率半径
（γ）に影響する特許請求の範囲第３項記載のノズル。 ５、前記曲率半径（γ）は溶融金属（７）の表面張力（
σ）と、金属静圧（Ｐｍｅｔ）と空気クツンヨンの圧力
（ＰＩとの差との比によって定まる特許請求の範囲第４
項記載のノズル。 ６ 前記空気クツ７ヨンは空気通路（Ｉ４）に導入した
アルゴン等の不活性ガスによって形成する特許請求の範
囲第３項ないし第５項の１項記載のノズル。[Claims] ■ A method for supplying molten metal into a gap between a roll, mold, belt, etc. of a casting machine through a nozzle or a passage in a nozzle mouth, which Or, forming an air cushion between the nozzle cap and the nozzle cap,
A molten metal supply method characterized in that the radius of curvature of molten metal formed between the outlet of a nozzle mouthpiece and a molten metal contact point such as a roll, mold, or belt is influenced by an air cushion. 2. The air cushion acts as a hydrodynamic paradox, which causes the nozzle cap to roll, mold,
Claim 1, which is held at a predetermined distance from a belt etc.
The method described in section. 3. A nozzle that supplies molten metal through a single passage into the gap between the rolls, molds, belts, etc. of a casting machine, and is installed on the upper and lower nozzle walls (4, 5). An air passage is provided which opens into the space (J') between the base (1) and the wall of the mold (2, 3), belt, etc. and forms an air cushion of pressure within the above-mentioned throw. A molten metal supply nozzle characterized by: 4. The molten metal (7) flows out of the nozzle mouth (1) due to the pressure (D) of the air, and the molten metal (7) having a metal static pressure (Pmet) and a surface tension (D) enters the outlet (8). Mold wall (9
, 10) and the contact point (12). 5. The radius of curvature (γ) is determined by the surface tension (
σ) and the difference between the metal static pressure (Pmet) and the air pressure (PI).
Nozzle as described in section. 6. The nozzle according to claim 3, wherein the air tube is formed by an inert gas such as argon introduced into the air passageway (I4).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH3019/837 | 1983-06-01 | ||
| CH3019/83A CH662073A5 (en) | 1983-06-01 | 1983-06-01 | METHOD FOR FEEDING A METAL MELT AND CASTING MACHINE FOR CARRYING OUT THE METHOD. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS606251A true JPS606251A (en) | 1985-01-12 |
Family
ID=4246810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59112878A Pending JPS606251A (en) | 1983-06-01 | 1984-06-01 | Molten metal supply method |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPS606251A (en) |
| BE (1) | BE899772A (en) |
| CH (1) | CH662073A5 (en) |
| DE (1) | DE3320322C2 (en) |
| FR (1) | FR2546782A1 (en) |
| GB (1) | GB2140720B (en) |
| IT (1) | IT1174119B (en) |
| LU (1) | LU85381A1 (en) |
| NL (1) | NL8401742A (en) |
| SE (1) | SE8402845L (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101286173B1 (en) * | 2009-07-27 | 2013-07-15 | 주식회사 포스코 | Steel strip casting apparatus with horizontal twin roll |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3810302A1 (en) * | 1988-03-24 | 1989-10-12 | Mannesmann Ag | CASTING DEVICE FOR THE CONTINUOUS PRODUCTION OF METAL STRIP |
| EP0470608B1 (en) * | 1990-08-09 | 1999-11-24 | Nippon Steel Corporation | Method and apparatus for continuous casting |
| US6386267B1 (en) * | 1999-07-30 | 2002-05-14 | Hazelett Strip-Casting Corporation | Non-rotating, levitating, cylindrical air-pillow apparatus and method for supporting and guiding an endless flexible casting belt into the entrance of a continuous metal-casting machine |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH508433A (en) * | 1970-06-24 | 1971-06-15 | Prolizenz Ag C O Schweiz Kredi | Nozzle for feeding the molten metal into the caterpillar mold during strip casting |
| FR2252154B1 (en) * | 1973-11-28 | 1976-12-03 | Siderurgie Fse Inst Rech | |
| DE2444269A1 (en) * | 1974-09-17 | 1976-04-01 | Metallgesellschaft Ag | Segregation- free band shaped, cast strands mfr on band casting mach - where a melt in caused to solidify between revolving casting belts |
| JPS571545A (en) * | 1980-06-03 | 1982-01-06 | Mitsubishi Heavy Ind Ltd | Endless track type continuous horizontal casting plant and its operating method |
| DE3131353A1 (en) * | 1981-08-07 | 1983-02-24 | Neue Technik Entwicklung und Vertrieb F. Block, 5106 Roetgen | "METHOD AND DEVICE FOR SEALING THE GAP BETWEEN RELATIVELY MOVING DEVICES" |
-
1983
- 1983-06-01 CH CH3019/83A patent/CH662073A5/en not_active IP Right Cessation
- 1983-06-04 DE DE3320322A patent/DE3320322C2/en not_active Expired
-
1984
- 1984-05-25 SE SE8402845A patent/SE8402845L/en not_active Application Discontinuation
- 1984-05-28 LU LU85381A patent/LU85381A1/en unknown
- 1984-05-29 BE BE0/213019A patent/BE899772A/en not_active IP Right Cessation
- 1984-05-29 FR FR8408443A patent/FR2546782A1/en active Pending
- 1984-05-29 GB GB08413639A patent/GB2140720B/en not_active Expired
- 1984-05-30 IT IT21170/84A patent/IT1174119B/en active
- 1984-05-30 NL NL8401742A patent/NL8401742A/en not_active Application Discontinuation
- 1984-06-01 JP JP59112878A patent/JPS606251A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101286173B1 (en) * | 2009-07-27 | 2013-07-15 | 주식회사 포스코 | Steel strip casting apparatus with horizontal twin roll |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3320322A1 (en) | 1984-12-06 |
| CH662073A5 (en) | 1987-09-15 |
| GB2140720A (en) | 1984-12-05 |
| BE899772A (en) | 1984-11-29 |
| DE3320322C2 (en) | 1985-12-12 |
| IT8421170A1 (en) | 1985-11-30 |
| LU85381A1 (en) | 1984-11-19 |
| FR2546782A1 (en) | 1984-12-07 |
| GB2140720B (en) | 1986-10-22 |
| SE8402845D0 (en) | 1984-05-25 |
| IT1174119B (en) | 1987-07-01 |
| IT8421170A0 (en) | 1984-05-30 |
| SE8402845L (en) | 1984-12-02 |
| NL8401742A (en) | 1985-01-02 |
| GB8413639D0 (en) | 1984-07-04 |
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