JP3122321B2 - Continuous casting equipment and melting furnace by induction heating with magnetic flux interruption device - Google Patents
Continuous casting equipment and melting furnace by induction heating with magnetic flux interruption deviceInfo
- Publication number
- JP3122321B2 JP3122321B2 JP06317717A JP31771794A JP3122321B2 JP 3122321 B2 JP3122321 B2 JP 3122321B2 JP 06317717 A JP06317717 A JP 06317717A JP 31771794 A JP31771794 A JP 31771794A JP 3122321 B2 JP3122321 B2 JP 3122321B2
- Authority
- JP
- Japan
- Prior art keywords
- induction heating
- magnetic
- magnetic flux
- heating coil
- side wall
- 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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- General Induction Heating (AREA)
- Continuous Casting (AREA)
- Furnace Details (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は電磁誘導加熱による誘導
加熱連続鋳造装置または誘導溶解炉に関し、より詳細に
は、高周波誘導加熱型連続鋳造装置や高周波誘導溶解炉
の誘導加熱コイルが発生する磁束が外周側に漏洩するの
を防止して、外周側の構造部材が誘導加熱により加熱さ
れるのを防止し、また誘導加熱コイルに印加する電力を
有効に利用して効率的な溶解を行うための磁束遮断装置
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induction heating continuous casting apparatus or induction melting furnace using electromagnetic induction heating, and more particularly, to a magnetic flux generated by an induction heating coil of a high frequency induction heating type continuous casting apparatus or a high frequency induction melting furnace. In order to prevent the structure member on the outer peripheral side from being heated by the induction heating, and to efficiently utilize the electric power applied to the induction heating coil for efficient melting. A magnetic flux cut-off device.
【０００２】[0002]
【従来の技術】電気伝導性を有し所定の電気抵抗値を有
する金属あるいは合金などの溶解方法として、被溶解材
料の周囲に巻回した銅製の誘導加熱コイル（以下コイル
と略称する）に、例えば高周波電流を供給し、このコイ
ルが周囲に発生する交番磁界により被溶解材料の特に表
面近傍に生じる誘導電流（渦電流とも称する）を利用し
てジュール熱により被溶解材料を溶融する誘導加熱型の
連続鋳造装置、または誘導溶解炉が知られている。この
方法は、ローレンツ力による電磁閉じ込め力が作用して
溶湯がルツボあるいは側壁に対して軟接触になること、
磁場による溶湯の撹拌作用を利用できること、輻射によ
る熱損失が少ないこと、周囲の雰囲気を調整しやすいこ
と、アイドルタイムが短いこと、など種々の利点を有す
るため、特に高純度の金属や合金、高融点金属など高品
質の材料の溶解に利用されている。図５は、一例として
従来技術による高周波誘導加熱法によるコールドウォー
ル型の連続鋳造装置５０を示すもので、本図（Ａ）は、
連続鋳造装置５０の縦断面図であり、本図（Ｂ）は、側
壁５１だけを上方から見た平面図であり、本図（Ｃ）
は、本図（Ｂ）の側壁５１を構成するセグメント５２の
一つをＸ−Ｘ線で切断した断面図であり、本図（Ｄ）
は、別の構成のセグメント５２′の構造の一部を示す断
面図である。2. Description of the Related Art As a method of melting a metal or an alloy having a predetermined electric resistance value with electric conductivity, a copper induction heating coil (hereinafter abbreviated as a coil) wound around a material to be melted is used. For example, an induction heating type in which a high-frequency current is supplied and this coil uses an induction current (also called an eddy current) generated particularly near the surface of the material to be melted by an alternating magnetic field generated around the coil to melt the material to be melted by Joule heat Or an induction melting furnace. In this method, the molten metal becomes soft contact with the crucible or the side wall due to the electromagnetic confinement force due to Lorentz force,
It has various advantages such as being able to use the stirring action of the molten metal by the magnetic field, less heat loss due to radiation, easy adjustment of the surrounding atmosphere, and a short idle time. It is used for melting high quality materials such as melting point metals. FIG. 5 shows, as an example, a cold wall type continuous casting apparatus 50 by a high frequency induction heating method according to the prior art.
It is a longitudinal cross-sectional view of the continuous casting apparatus 50, FIG. (B) is a plan view of only the side wall 51 viewed from above, and FIG.
Is a cross-sectional view of one of the segments 52 constituting the side wall 51 of FIG.
Is a sectional view showing a part of the structure of a segment 52 'having another configuration.
【０００３】図５を参照して連続鋳造装置５０の主要構
造を以下に説明する。この装置は上下方向には上から順
に、溶湯供給部５５、保温・撹拌部５９、鋳造部５６さ
らに引抜き部５７が配列され、その他に高周波電源部５
８と図示しない給湯や引抜きのための制御部が設けられ
ている。溶湯供給部５５には、図示しない誘導溶解炉か
ら給湯された溶湯５３を保持し保温・撹拌部５９に給湯
するタンディッシュ６１と溶湯５３の流出を停止するス
トッパ６２が、保温・撹拌部５９には、図５（Ｂ）に示
す電磁界鋳型としての水冷された複数のセグメント５２
がスリット５４を介して隣接して形成されたコールドウ
ォールの側壁５１と、この側壁５１の外周側に上下に螺
旋状に巻回されケーブル６７を介して高周波電源部５８
から高周波電流が供給されるコイル６６と、このコイル
６６を支持する支持部６８などが設けられる。鋳造部５
６には振動装置７１に固定された支持台７２と支持台７
２上に載置された水冷鋳型７３と、水スプレー７４と、
この水スプレー７４の下部には錘７５を利用した引抜き
部５７が、それぞれ設けられている。保温・撹拌部５９
の側壁５１は、冷却効率が良く誘導加熱されにくいよう
に通常は熱伝導性と電気伝導性が共に良好な銅または銅
合金が用いられ、図５（Ｂ）に示したように、スリット
５４を介して複数のセグメント５２が周方向に隣接して
並び全体として四角形などの多角形または図示しない円
形に形成されており、その中には図５（Ｃ）または図５
（Ｄ）に矢印で示すように冷却のため冷却水が上に向か
う一方向に、または内管５２″を設けて往復方向に流さ
れている。側壁内の冷却水は、一方向に流れる方式の他
にも通路をＵ字形にして往復方向に流してから排出する
方式のもの、さらに各セグメントを１対の単位セグメン
トで構成し、一方の内部を流入路に、他方の内部を流出
路にしたものも開発されている。The main structure of the continuous casting apparatus 50 will be described below with reference to FIG. In this apparatus, a molten metal supply unit 55, a heat keeping / stirring unit 59, a casting unit 56, and a drawing unit 57 are arranged in this order from the top in the vertical direction.
8 and a controller (not shown) for hot water supply and withdrawal. The molten metal supply unit 55 includes a tundish 61 for holding the molten metal 53 supplied from an induction melting furnace (not shown) and supplying the molten metal 53 to a heat retaining / stirring unit 59 and a stopper 62 for stopping outflow of the molten metal 53. Is a plurality of water-cooled segments 52 as an electromagnetic field mold shown in FIG.
Are formed vertically adjacent to each other through a slit 54, and a high-frequency power supply unit 58 is spirally wound around the outer peripheral side of the side wall 51 in a vertically spiral manner through a cable 67.
A coil 66 to which a high-frequency current is supplied from the controller and a support portion 68 for supporting the coil 66 are provided. Casting part 5
6 includes a support table 72 fixed to the vibration device 71 and a support table 7.
2, a water-cooled mold 73 placed on the top, a water spray 74,
At the lower part of the water spray 74, there are provided withdrawing portions 57 using weights 75, respectively. Heat insulation / stirrer 59
The side wall 51 is usually made of copper or a copper alloy having both good heat conductivity and good electric conductivity so that the cooling efficiency is high and the induction heating is difficult. As shown in FIG. A plurality of segments 52 are arranged adjacent to each other in the circumferential direction, and are formed in a polygon such as a square or a circle (not shown) as a whole.
(D), as indicated by an arrow, cooling water flows upward in one direction or in a reciprocating direction with an inner pipe 52 ". The cooling water in the side wall flows in one direction. In addition, a system in which the passage is formed in a U-shape to discharge in a reciprocating direction and then discharged, and each segment is constituted by a pair of unit segments, one of which is an inflow channel and the other is an outflow channel. Some have been developed.
【０００４】図５（Ａ）を参照してこの連続鋳造装置５
０の作動を簡単に説明すると、タンディッシュ６１の中
央部から給湯された溶湯５３は、側壁５１の内周側に形
成された溶湯プールの中に落下し、ここでコイル６６に
より保温されて溶解したまま撹拌される。保温・撹拌部
５９の溶湯は、引張り作用により引抜き部５７の下方に
徐々に下降し、水冷鋳型７３の内周側に、さらに水スプ
レー７４の近傍に進むにつれて、外周側から冷却されて
徐々に凝固相を形成して最後に断面全体が凝固した棒状
の固体として鋳造が完了する。なお、溶湯供給部の代わ
りに粉末状あるいは粒状の固体を供給する被溶解材料供
給部が設けられて、保温・撹拌部で投入された被溶解材
料の溶解も行う連続溶解鋳造装置も使用されている。図
６は、従来技術による連続鋳造装置の保温・撹拌部８１
の一例を示す縦断面の模式図である。この図では詳細部
分は省略しているが、各部材は全体として筒状に構成さ
れており、上方から順に、溶湯１３の外周側への飛散を
防止するためテーパ部を有する絶縁材料製のカバー８２
と、このカバー８２と連続して配置された銅製の複数の
セグメントによる側壁１１と、この側壁１１の外周側に
所定の間隔を有して図のほぼ上下中央部に巻回されたコ
イル１２と、コイル１２や図示しないケーブルを支持す
る銅製のフレーム８６と、内径が前記の側壁１１の外径
とほぼ同じでこの側壁１１の外周側でコイル１２の上下
に配置され前記のフレーム８６と複数のボルト５とナッ
ト６で固定された上、下のこの例では円板２′、３′な
どが配置されている。通常、上の円板２′は絶縁性のベ
ークライト製に、下の円板３′は磁束を遮断するため銅
製にされている。[0004] Referring to FIG.
In brief, the operation of No. 0 will be described. The molten metal 53 supplied from the central part of the tundish 61 falls into a molten metal pool formed on the inner peripheral side of the side wall 51, where it is kept warm by the coil 66 and melted. Stir while stirring. The molten metal of the heat retaining / stirring section 59 gradually descends below the drawing section 57 by a pulling action, and is gradually cooled down from the outer peripheral side toward the inner peripheral side of the water-cooled mold 73 and further to the vicinity of the water spray 74. Casting is completed as a rod-like solid having a solidified phase formed and finally solidified in its entire cross section. In addition, a continuous melting casting device is also used in which a material to be melted supply unit that supplies a powdery or granular solid is provided in place of the melt supply unit, and also melts the material to be melted supplied in the warming / stirring unit. I have. FIG. 6 shows a heat retaining / stirring unit 81 of a conventional continuous casting apparatus.
It is a schematic diagram of a longitudinal section showing an example of the above. Although detailed parts are omitted in this figure, each member is formed in a cylindrical shape as a whole, and a cover made of an insulating material having a tapered portion in order from the top to prevent the molten metal 13 from scattering to the outer peripheral side. 82
And a side wall 11 composed of a plurality of copper segments arranged continuously with the cover 82, and a coil 12 wound around the upper and lower center of the figure at a predetermined interval on the outer peripheral side of the side wall 11. A copper frame 86 for supporting the coil 12 and a cable (not shown), and a plurality of frames 86, which are arranged above and below the coil 12 on the outer peripheral side of the side wall 11 and have an inner diameter substantially equal to the outer diameter of the side wall 11. In this example below, disks 2 ', 3', etc. are arranged, which are fixed by bolts 5 and nuts 6. Usually, the upper disk 2 'is made of insulating bakelite, and the lower disk 3' is made of copper to block magnetic flux.
【０００５】側壁１１内の溶湯１３はコイル１２が発生
して図５（Ｂ）に示された隣接するセグメント５２間の
スリット５４を通過する磁束の交番磁界による前記の電
磁閉じ込め力によって、図６に示したように中央部が盛
り上がり側壁１１の内周面とは僅かに接触するだけであ
り、コイル１２の上下の中央部を過ぎて下方に下がった
部分は磁束密度が小さくなりコイル１２の加熱作用が減
少し外周側から凝固して凝固相１３ａを形成する。コイ
ル１２による磁束φは、このコイル１２の軸線に直角に
環状に形成され、側壁１１内部の溶湯１３や凝固相１３
ａに当たると表皮効果のため表面側を通過し内部には侵
入せず、側壁１１の外周側では大きく形成されて遠くま
で及んでいる。このような磁束の発生状況は、ホットウ
ォールやコールドウォールのルツボによる高周波の誘導
溶解炉においても同様である。The molten metal 13 in the side wall 11 is generated by the electromagnetic confinement force of the alternating magnetic field of the magnetic flux generated by the coil 12 and passing through the slit 54 between the adjacent segments 52 shown in FIG. As shown in the figure, the central portion rises and only makes slight contact with the inner peripheral surface of the side wall 11, and the magnetic flux density decreases in the portion that goes down below the upper and lower central portions of the coil 12, and the coil 12 is heated. The action is reduced, and the solidification is performed from the outer peripheral side to form a solidified phase 13a. The magnetic flux φ generated by the coil 12 is annularly formed at right angles to the axis of the coil 12,
When it hits “a”, it passes through the surface side due to the skin effect and does not enter the inside, but is formed largely on the outer peripheral side of the side wall 11 and extends far. Such a situation of generation of magnetic flux is the same in a high-frequency induction melting furnace using a crucible of a hot wall or a cold wall.
【０００６】[0006]
【発明が解決しようとする課題】ところが、コイルに電
流が流れることにより発生する磁束は、コイルの内周側
すなわち側壁内の溶湯側だけではなく、コイルの外周側
にも達するループを形成するため、この磁束が達する位
置の範囲内に配置された鋼製などの誘導加熱され易い金
属は、磁場による加熱作用を受けてしまう。この磁束は
軸方向上方から見て放射状に発生しているため、半径方
向内方の溶湯側で磁束密度が大きく側壁の外周側では磁
束密度が小さくなる傾向を有するが、それでも、側壁に
近い位置に配置された金属は溶湯とほぼ同様の加熱作用
を受けるため、金属部材の種類によっては溶解されてし
まうことがある。そのため、従来、側壁の近傍には、構
造部材として電気抵抗値の小さな銅などの金属かあるい
は絶縁性の樹脂やセラミックスなどの材料を配置するし
か方法がなかった。さらに、側壁の外周側にも発生する
磁束によりコイルに流れる電流が無駄に消費されて、印
加電力量の割に溶解あるいは保温できる溶湯の量が少な
いという欠点を有していた。本発明は、高周波誘導加熱
を利用した連続鋳造装置や誘導溶解炉において上記の欠
点をなくし、誘導加熱され易いが強度が大きな鋼材をコ
イル近傍で使用可能にし、また印加電力量に対する溶解
効率を増大できる磁束遮断装置を備えた連続鋳造装置を
提供することを課題とする。However, the magnetic flux generated by the current flowing through the coil forms a loop that reaches not only the inner peripheral side of the coil, that is, the molten metal side in the side wall, but also the outer peripheral side of the coil. However, a metal such as steel, which is arranged within a range where the magnetic flux reaches, and is easily subjected to induction heating, is subjected to a heating action by the magnetic field. Since this magnetic flux is generated radially when viewed from above in the axial direction, the magnetic flux density tends to be large on the molten metal side inward in the radial direction and small on the outer peripheral side of the side wall. Is subjected to a heating action substantially similar to that of the molten metal, and may be melted depending on the type of the metal member. Therefore, conventionally, there has been no alternative but to dispose a metal such as copper having a small electric resistance or a material such as an insulating resin or ceramic as a structural member in the vicinity of the side wall. Further, there is a disadvantage that the current flowing through the coil is wasted by the magnetic flux also generated on the outer peripheral side of the side wall, and the amount of molten metal that can be melted or kept warm is small for the amount of applied power. The present invention eliminates the above-mentioned drawbacks in a continuous casting apparatus or induction melting furnace using high-frequency induction heating, makes it possible to use steel that is easily heated by induction but has a high strength near the coil, and increases the melting efficiency with respect to the applied electric energy. An object of the present invention is to provide a continuous casting apparatus provided with a magnetic flux interrupting device that can be used.
【０００７】[0007]
【課題を解決するための手段】本発明は、コイルの上、
下両側および外周側を囲むように、円環状または四角形
など角形環状で軸方向断面でコイル側が開いたコの字
形、または直立筒形で磁性材料製の磁気遮断部材を、コ
イルと所定の間隔を有して配置して上記の課題を解決し
た。具体的には、電気抵抗値が大きなけい素鋼などの電
磁鋼板の積層体やＦｅ2Ｏ3を主成分とするフェライトな
どの磁性材料を軸方向断面がコの字形、または直立円筒
状や多角筒状に成形した磁気遮断部材の凹部または内面
をコイルの外周に向けて配置し、この磁気遮断部材の
上、下の両端面を、銅または銅合金製で内周の寸法が側
壁の外周の寸法とほぼ等しい内周の寸法で中央部が開口
された上、下の円板または多角板で挟み、さらに外周の
寸法が前記の上、下の円板または多角板の外周の寸法と
ほぼ等しくかつ軸方向断面が外周側に開いた、前記の磁
気遮断部材の外周側に所定の間隔で離して配置した鋼製
のフレームの上、下のフランジ部と、前記の上、下の円
板または多角板とを複数のボルトとナットで固定した構
成による磁束遮断装置によって上記の課題を解決した。
また、磁気遮断部材の形状を筒形に変えた構成や、磁気
遮断部材をコイルの外周側に周方向の所定の等しい間隔
で分離して配置した構成によっても上記の課題を解決し
た。SUMMARY OF THE INVENTION The present invention provides a method for controlling
A magnetic shielding member made of a magnetic material in a U-shape having a coil side open in an axial cross section in an annular cross section such as an annular shape or a square shape or an upright cylindrical shape so as to surround the lower side and the outer peripheral side at a predetermined distance from the coil. The above problem has been solved. Specifically, a laminate of magnetic steel sheets such as silicon steel having a large electric resistance value or a magnetic material such as ferrite containing Fe 2 O 3 as a main component has a U-shaped cross section in the axial direction, an upright cylindrical shape or a polygonal shape. The concave portion or the inner surface of the magnetic shielding member formed in a cylindrical shape is arranged toward the outer periphery of the coil, and both upper and lower end surfaces of the magnetic shielding member are made of copper or a copper alloy, and the inner peripheral dimension of the outer peripheral surface of the side wall. The upper and lower discs or polygonal plates are sandwiched between upper and lower discs or polygonal plates with the center part opened with dimensions of the inner circumference substantially equal to the dimensions, and the outer dimensions are approximately equal to the outer dimensions of the upper, lower discs or polygonal plates. And the axial section is open to the outer peripheral side, the upper and lower flange portions of the steel frame arranged at predetermined intervals on the outer peripheral side of the magnetic shielding member, and the upper and lower disks or Magnetic flux cut-off device with polygon plate fixed with multiple bolts and nuts Therefore, the foregoing problems are eliminated.
In addition, the above-mentioned problems have been solved by a configuration in which the shape of the magnetic shielding member is changed to a cylindrical shape, or a configuration in which the magnetic shielding members are arranged on the outer peripheral side of the coil at predetermined equal circumferential intervals.
【０００８】[0008]
【作用】誘導加熱型連続鋳造装置あるいは誘導溶解炉の
コイルの上下両側および／または外周側に配置したけい
素鋼板などの電磁鋼板やフェライトは、磁束をコイルの
外周側では近傍で短絡させその外部に対しては磁束を遮
断するため、磁束遮断装置の近傍の外周側に鉄系の構造
材料を配置しても渦電流による発熱を生じることなく使
用できる。さらに、前記の電磁鋼板やフェライトは電気
抵抗値が大きいため、高周波の交番磁界中に置かれても
渦電流損が少なく、かつ従来に比べて磁路を小さく短絡
させるため単位印加電流あたりのコイルの発生磁束数を
増し溶解のため消費される電力効率が従来より増大す
る。[Function] An electromagnetic steel sheet or ferrite such as a silicon steel sheet disposed on both upper and lower sides and / or an outer peripheral side of a coil of an induction heating type continuous casting apparatus or an induction melting furnace causes a magnetic flux to be short-circuited in the vicinity of the outer peripheral side of the coil, thereby causing an external short circuit. Therefore, even if an iron-based structural material is arranged on the outer peripheral side in the vicinity of the magnetic flux cut-off device, it can be used without generating heat due to eddy current. Further, since the above-mentioned magnetic steel sheet and ferrite have a large electric resistance value, even if they are placed in a high-frequency alternating magnetic field, the eddy current loss is small, and the magnetic circuit is short-circuited as compared with the conventional one. And the power efficiency consumed for melting is increased as compared with the conventional case.
【０００９】[0009]
【実施例】図１は、本発明による第１実施例である磁束
遮断装置１０を付設した連続鋳造装置の保温・撹拌部１
９を示す縦断面の模式図である。第１実施例の磁束遮断
装置１０は、円環状で内径側が開いて軸線方向断面がコ
の字形形状に形成されたＦｅ2Ｏ3系のフェライト製のあ
るいはけい素鋼など積層電磁鋼板などの磁性材料製の磁
気遮断部材１を、側壁１１の外周側のコイル１２の上
方、下方および外周側から所定の間隔で離して包むよう
に配置する。この磁気遮断部材１より大きな外径を有し
磁気遮断部材１の上下両端面１ａ、１ｂをそれぞれ挟ん
で支持する２枚の中空の円板２、３と、これらの２枚の
円板２、３の対向面２ａ、３ａの外縁側で磁気遮断部材
１の外周面１ｃとは接しないように上、下の円板２、３
に挟まれた円環状で外径側が開いて軸線方向断面がコの
字形形状の鋼製のフレーム４とは、このフレーム４の上
下のフランジ部４ａ、４ｂがそれぞれ上、下の円板２、
３に複数のボルト５とナット６により固定され相互に支
持されている。コイル１２は、側壁１１と上、下の円板
２、３と磁気遮断部材１で囲まれる空間にアルミナ、シ
リカなどセラミック製の絶縁粒子７を充填して保持され
ている。なお、符号８は全体または一部が鋼製のカバー
である。コイル１２の別の保持手段としては、ガラスエ
ポキシ積層板やベークライトなどの絶縁材料を前記の空
間に挿入する方法も採用できる。図１のその他の部材の
構成は、図６の構成と同様であるので説明は省略する。
なお、図１以下に示す各実施例では、水平方向断面形状
が円環状の側壁を有する連続鋳造装置または誘導溶解炉
について説明するが、側壁が四角形など多角形の環状で
あり、その外周側に配置される磁気遮断部材など環状の
各部材が多角形である場合も、説明する各実施例とは部
材の形状が異なるだけであって、作用および効果は各実
施例の場合と全く同じであるため、説明は省略する。FIG. 1 shows a heat retaining / stirring unit 1 of a continuous casting apparatus provided with a magnetic flux cut-off device 10 according to a first embodiment of the present invention.
FIG. 9 is a schematic view of a vertical section showing 9. The magnetic flux interrupter 10 of the first embodiment is made of a magnetic material such as a laminated magnetic steel plate such as a Fe 2 O 3 -based ferrite or silicon steel having an annular shape with an inner diameter side open and an axial cross section formed in a U-shape. The magnetic shielding member 1 made of a material is arranged so as to be wrapped at predetermined intervals from above, below, and the outer peripheral side of the coil 12 on the outer peripheral side of the side wall 11. Two hollow disks 2, 3 having an outer diameter larger than that of the magnetic shielding member 1 and supporting the upper and lower end surfaces 1a, 1b of the magnetic shielding member 1, respectively; The upper and lower disks 2 and 3 are arranged so that the outer edges of the opposing surfaces 2a and 3a do not contact the outer peripheral surface 1c of the magnetic shielding member 1.
The upper and lower flanges 4a and 4b of the frame 4 are an upper and lower disk 2, respectively.
3 are fixed by a plurality of bolts 5 and nuts 6 and are mutually supported. The coil 12 is held by filling ceramic insulating particles 7 such as alumina and silica into a space surrounded by the side wall 11, the upper and lower disks 2 and 3, and the magnetic blocking member 1. Reference numeral 8 is a cover entirely or partially made of steel. As another holding means of the coil 12, a method of inserting an insulating material such as a glass epoxy laminate or bakelite into the space can be adopted. The configuration of the other members in FIG. 1 is the same as the configuration in FIG.
In each of the embodiments shown in FIG. 1 and subsequent figures, a continuous casting apparatus or an induction melting furnace having an annular side wall having a horizontal cross-sectional shape will be described. However, the side wall is a polygonal ring such as a square, and an outer peripheral side thereof is provided. When each annular member such as a magnetic shielding member to be arranged is polygonal, the operation and effects are exactly the same as those in each embodiment, except that the shape of each member is different from each embodiment described. Therefore, the description is omitted.
【００１０】図１のように磁束遮断装置１０を設ける
と、コイル１２が発生する磁束φの通路（磁路）は、コ
イル１２の内周側では従来通りであるが、コイル１２の
外周側では近接して配置された磁気遮断部材１内を通り
上方、下方と外周側の遠方に漏れることがなくなる。こ
の結果、図６に示した従来のフレーム８６のように誘導
加熱しにくく渦電流損が小さいが、強度が小さな銅など
を使用する必要がなくなり、本発明のように鋼製のフレ
ーム４を使用することも可能になった。同様に、従来の
技術では加工性が悪く製造コストが高いセラミックなど
絶縁材料が使用されていた図６に示したカバー８２は、
本発明では加工性が良好で低コストで製造できる鋼製の
カバー８を採用することが可能になった。この他にも、
従来は図５に示すコイル６６に電流を供給するケーブル
６７において従来生じていたジュール損も、本発明では
図示しないケーブルまでは磁束が及ばなくなるため無視
できる程度に減少される。さらに、磁気遮断部材１を配
置したことによるもう一つの効果として、コイルによる
磁場内の磁気抵抗が減少してコイルに流れる電流による
発生磁束数が増大された。この点に関する試験の結果を
以下に示す。図１に示した第１実施例の構成による保温
・撹拌部を実施例１として、図６に示した磁束遮断装置
を設けない構成の保温・撹拌部を比較例１として、それ
ぞれのコイルに高周波電流を通電してインダクタンスを
求めた。なお、試験に供した分割鋳型は図５（Ｂ）に示
したように四角形で、その寸法は内周の各辺が１４９ｍ
ｍ、外周の各辺が１９７ｍｍであり、コイルも四角形で
寸法は内周の各辺が２１３ｍｍで、上下の寸法が８０ｍ
ｍで巻数は４ターンである。When the magnetic flux blocking device 10 is provided as shown in FIG. 1, the path (magnetic path) of the magnetic flux φ generated by the coil 12 is the same as the conventional one on the inner peripheral side of the coil 12, but is on the outer peripheral side of the coil 12. It does not leak to the upper, lower, and outer distant portions through the inside of the magnetic shielding member 1 arranged close to. As a result, unlike the conventional frame 86 shown in FIG. 6, the induction heating is difficult and the eddy current loss is small, but there is no need to use copper or the like having a small strength, and the steel frame 4 is used as in the present invention. It became possible to do it. Similarly, the cover 82 shown in FIG. 6, which uses an insulating material such as ceramic which is poor in workability and high in manufacturing cost in the related art,
In the present invention, it has become possible to employ a steel cover 8 which has good workability and can be manufactured at low cost. Besides this,
In the present invention, the Joule loss which has conventionally occurred in the cable 67 for supplying a current to the coil 66 shown in FIG. 5 is also reduced to a negligible extent because the magnetic flux does not reach the cable not shown in the present invention. Further, as another effect of the arrangement of the magnetic blocking member 1, the magnetic resistance in the magnetic field by the coil is reduced, and the number of magnetic fluxes generated by the current flowing through the coil is increased. The results of the test on this point are shown below. The heat retaining / stirring unit having the configuration of the first embodiment shown in FIG. 1 as the first embodiment, and the heat retaining / stirring unit without the magnetic flux shut-off device shown in FIG. A current was applied to determine the inductance. The split mold used for the test was a square as shown in FIG. 5 (B), and the size was 149 m on each side of the inner circumference.
m, each side of the outer circumference is 197 mm, the coil is also rectangular and the size is 213 mm on each side of the inner circumference, and the upper and lower dimensions are 80 m
m is 4 turns.
【００１１】インダクタンスＬは（１）式により求めら
れ、コイルに流れる単位電流当たりの発生磁束数として
得られる。 Ｌ＝Φ／Ｉ （１） ここで、Ｌ：インダクタンス Φ：磁束数 Ｉ：電流値 この試験の結果によるインダクタンスＬの値は、実施例
１の構成で２．０μＨ（ヘンリー、以下同じ）、比較例
１の構成で０．９５μＨであり、この比つまり約２．１
倍だけ実施例１の構成では同一電流を通電した場合に多
くの磁束を発生できることが判明した。図２は、本発明
による第２実施例である磁束遮断装置２０を付設した連
続鋳造装置の保温・撹拌部２９を示す縦断面の模式図で
ある。第２実施例の磁束遮断装置２０は磁気遮断部材２
１の形状が筒形である点だけが前記の第１実施例と異な
るものであるが、コイル１２の外周側の磁束φを閉じ込
める効果は第１実施例の場合と同様に得られる。図３
は、本発明による第３実施例である磁束遮断装置３０を
付設した連続鋳造装置の保温・撹拌部３９を示す一部破
断斜視図である。The inductance L is obtained by the equation (1) and is obtained as the number of magnetic fluxes generated per unit current flowing through the coil. L = Φ / I (1) Here, L: inductance Φ: number of magnetic fluxes I: current value The value of the inductance L based on the results of this test is 2.0 μH (Henry, the same applies hereinafter) in the configuration of the first embodiment. 0.95 μH in the configuration of Example 1, this ratio, ie, about 2.1
It has been found that in the configuration of the first embodiment, a large amount of magnetic flux can be generated when the same current is applied. FIG. 2 is a schematic longitudinal sectional view showing a heat retaining / stirring unit 29 of a continuous casting apparatus provided with a magnetic flux blocking device 20 according to a second embodiment of the present invention. The magnetic flux blocking device 20 according to the second embodiment includes a magnetic blocking member 2.
1 is different from the above-described first embodiment only in that the shape is cylindrical. However, the effect of confining the magnetic flux φ on the outer peripheral side of the coil 12 can be obtained as in the case of the first embodiment. FIG.
FIG. 7 is a partially cutaway perspective view showing a heat retaining / stirring unit 39 of a continuous casting apparatus provided with a magnetic flux blocking device 30 according to a third embodiment of the present invention.
【００１２】この磁束遮断装置３０はコイル１２の外周
側に、円周方向に分割して複数の磁気遮断部材３１を配
置して、全体として磁束遮断装置３０として構成したも
のであり、この例では磁気遮断部材３１として積層電磁
鋼板を使用しているがフェライトを使用することも可能
である。磁気遮断部材３１は円周方向両端面３１ａ、３
１ｂを断面Ｌ字形の銅板３２により固定されて銅板の足
部３２ａ、３２ｂが図示しない環状支持部材に固定され
保持されている。上記の各実施例はいずれも連続鋳造装
置の保温・撹拌部に対して磁束遮断装置を適用したもの
であるが、この磁束遮断装置は、バッチ式に溶解して鋳
型に注湯するホットウォール、コールドウォールを含め
た高周波誘導溶解炉に対しても同じ構成で適用できる。
図４は、本発明による第４実施例である磁束遮断装置４
０を付設したコールドウォール型の高周波誘導溶解炉４
９の主要部の縦断面図である。本図の高周波誘導溶解炉
４９の構成は、コールドウォールのルツボ４９ａの水室
４６ｂを形成する底板４６が側壁４５と一体化されて炉
床４６ａが固定している点が図２の連続鋳造装置と異な
るだけであり、側壁４５の外周側に配置されたコイル４
８のさらに外周側に筒形の磁気遮断部材４１がコイル４
８と離れて配置され、この磁気遮断部材４１は前記の底
板４６と上部の銅製（あるいは絶縁材料製）の中央部が
開口した円板４２とに上下を挟まれて支持されている。
底板４６と円板４２は、さらに軸方向の断面が外周側に
開いたコの字形で円周方向の等しい所定の間隔で上下方
向に延在するリブ４４ｃで補強された構成のフレーム４
４のフランジ部４４ａ、４４ｂを挟み図示しないボルト
で固定されている。側壁４５と円板４２と磁気遮断部材
４１と底板４６に囲まれた空間には、例えばアルミナ、
シリカなどセラミック製の絶縁粒子４７が充填されてい
て、コイル４８が保持されている。なお、図中の符号４
３は溶湯、４３ａはスカルである。This magnetic flux interrupting device 30 is configured as a magnetic flux interrupting device 30 as a whole by arranging a plurality of magnetic interrupting members 31 on the outer peripheral side of the coil 12 in a circumferential direction and arranging them. Although the laminated electromagnetic steel sheet is used as the magnetic shielding member 31, ferrite can be used. The magnetic blocking member 31 has both circumferential end surfaces 31a, 3a.
1b is fixed by a copper plate 32 having an L-shaped cross section, and the foot portions 32a and 32b of the copper plate are fixed and held by an annular support member (not shown). Each of the above embodiments is a case where a magnetic flux cut-off device is applied to the heat retaining / stirring unit of the continuous casting device, but this magnetic flux cut-off device is a hot wall that is melted in a batch type and poured into a mold. The same configuration can be applied to a high-frequency induction melting furnace including a cold wall.
FIG. 4 shows a magnetic flux cutoff device 4 according to a fourth embodiment of the present invention.
Cold-wall high-frequency induction melting furnace 4 with 0
9 is a vertical sectional view of a main part of FIG. The configuration of the high-frequency induction melting furnace 49 of this figure is different from the continuous casting apparatus of FIG. 2 in that the bottom plate 46 forming the water chamber 46b of the cold wall crucible 49a is integrated with the side wall 45 and the hearth 46a is fixed. And the coil 4 disposed on the outer peripheral side of the side wall 45.
Further, on the outer peripheral side of the coil 8, a cylindrical magnetic blocking member 41 is provided.
The magnetic shielding member 41 is supported by being sandwiched between the bottom plate 46 and an upper disc 42 made of copper (or made of an insulating material) having a central portion opened.
The bottom plate 46 and the disk 42 have a U-shape whose cross section in the axial direction is open to the outer peripheral side, and the frame 4 is configured to be reinforced with ribs 44c extending vertically at equal predetermined intervals in the circumferential direction.
4 are fixed by bolts (not shown) with the flange portions 44a and 44b therebetween. In the space surrounded by the side wall 45, the disk 42, the magnetic shielding member 41, and the bottom plate 46, for example, alumina,
The coil 48 is held by being filled with ceramic insulating particles 47 such as silica. Note that reference numeral 4 in FIG.
3 is a molten metal, 43a is a skull.
【００１３】本実施例の磁束遮断装置４０は、前記の磁
気遮断部材４１が円板４２と底板４６とに固定され、磁
気遮断部材４１と側壁４５との間の空間に絶縁粒子４７
が充填され、磁気遮断部材４１の外周側に所定の間隔を
有してフレーム４４が配置され、これらが全体として固
定された構成である。この場合、図示しない磁束が磁気
遮断部材４１の外周側に漏れない効果として、溶湯４３
の注湯時にルツボ４９ａを傾斜させるための図示しない
鋼製の回転軸の誘導加熱が防止され、温度上昇による強
度低下が避けられる。一例として筒形の磁気遮断部材４
１を使用した磁束遮断装置４０を示したが、連続鋳造装
置の図１および図３に示した軸方向の断面がコの字形で
全体として円環状の、または分割型の磁気遮断部材を誘
導溶解炉に使用しても第４実施例の場合と同様の効果が
得られる。なお、上記の全実施例において、鋼製のフレ
ームは渦電流損が大きいので、磁気遮断部材に接触する
と漏れ磁束を拾うため非接触にする必要がある。In the magnetic flux blocking device 40 of the present embodiment, the magnetic blocking member 41 is fixed to the disk 42 and the bottom plate 46, and the insulating particles 47 are provided in the space between the magnetic blocking member 41 and the side wall 45.
And a frame 44 is arranged at a predetermined interval on the outer peripheral side of the magnetic shielding member 41, and these are fixed as a whole. In this case, as an effect that magnetic flux (not shown) does not leak to the outer peripheral side of the
Induction heating of a steel rotary shaft (not shown) for inclining the crucible 49a at the time of pouring is prevented, and a decrease in strength due to a rise in temperature is avoided. As an example, a cylindrical magnetic shielding member 4
1 and FIG. 3, the axial cross section of the continuous casting apparatus shown in FIGS. 1 and 3 has a U-shape, and an annular or divided magnetic shielding member as a whole is induction-melted. Even when used in a furnace, the same effects as in the fourth embodiment can be obtained. In all of the above-described embodiments, the steel frame has a large eddy current loss, so that it needs to be in a non-contact state in order to pick up a leakage magnetic flux when it comes into contact with the magnetic interrupting member.
【００１４】[0014]
【発明の効果】本発明の磁束遮断装置は、コイルが発生
する磁束をコイルの外周側を包むように近接して配置し
たフェライト製や電磁鋼板製の磁気遮断部材により捕捉
してそれより外周側への漏洩をなくし、コイル近傍に配
置された鋼製などの構造部材の発熱による強度低下や溶
融を防止すると共に、外周側のジュール損をなくしてコ
イルに供給される高周波電流による発生磁束密度を高め
て溶解効率を増大するという優れた効果を有する。According to the magnetic flux cut-off device of the present invention, the magnetic flux generated by the coil is captured by a magnetic cut-off member made of ferrite or electromagnetic steel sheet which is disposed close to the outer circumference of the coil, and is captured toward the outer circumference. To prevent the strength reduction and melting due to heat generation of the structural members such as steel placed near the coil, and to eliminate the Joule loss on the outer peripheral side to increase the magnetic flux density generated by the high-frequency current supplied to the coil. And has an excellent effect of increasing dissolution efficiency.
【図１】本発明による第１実施例である磁束遮断装置を
付設した連続鋳造装置の保温・撹拌部を示す縦断面の模
式図である。FIG. 1 is a schematic longitudinal sectional view showing a heat retaining / stirring unit of a continuous casting apparatus provided with a magnetic flux blocking device according to a first embodiment of the present invention.
【図２】本発明による第２実施例である磁束遮断装置を
付設した連続鋳造装置の保温・撹拌部を示す縦断面の模
式図である。FIG. 2 is a schematic longitudinal sectional view showing a heat retaining / stirring unit of a continuous casting apparatus provided with a magnetic flux blocking device according to a second embodiment of the present invention.
【図３】本発明による第３実施例である磁束遮断装置を
付設した連続鋳造装置の保温・撹拌部を示す一部破断斜
視図である。FIG. 3 is a partially broken perspective view showing a heat retaining / stirring part of a continuous casting apparatus provided with a magnetic flux blocking device according to a third embodiment of the present invention.
【図４】本発明による第４実施例である磁束遮断装置を
付設したコールドウォール型の高周波誘導溶解炉の主要
部の縦断面図である。FIG. 4 is a longitudinal sectional view of a main part of a cold wall type high frequency induction melting furnace provided with a magnetic flux blocking device according to a fourth embodiment of the present invention.
【図５】従来技術による高周波誘導加熱法によるコール
ドウォール型の連続鋳造装置を示すもので、本図（Ａ）
は、連続鋳造装置の縦断面図であり、本図（Ｂ）は、ル
ツボの側壁だけを上方から見た平面図であり、本図
（Ｃ）は、本図（Ｂ）の側壁を構成するセグメントの一
つをＸ−Ｘ線で切断した断面図であり、本図（Ｄ）は別
のセグメントの構造の一部を示す断面図である。FIG. 5 shows a cold-wall type continuous casting apparatus using a high-frequency induction heating method according to the prior art.
1 is a longitudinal sectional view of a continuous casting apparatus, FIG. 1 (B) is a plan view of only the side wall of the crucible viewed from above, and FIG. 1 (C) constitutes the side wall of FIG. 1 (B). It is sectional drawing which cut | disconnected one of the segments by XX line, and this figure (D) is sectional drawing which shows a part of structure of another segment.
【図６】従来技術による連続鋳造装置の保温・撹拌部の
別の一例を示す縦断面の模式図である。FIG. 6 is a schematic view of a longitudinal section showing another example of a heat retaining / stirring unit of a conventional continuous casting apparatus.
１、２１、３１、４１ 磁気遮断部材 ２、３、４２ 円板 ４、４４ フレーム ４ａ、４ｂ、４４ａ、４４ｂ フランジ部 ５ ボルト ６ ナット ８ カバー ７、４７ 絶縁粒子 １１、４５ 側壁 １２、４８ 誘導加熱コイル １９、２９、３９ 保温・撹拌部 ３１ａ、３１ｂ 端面 ３２ 銅板 ４６ 底板 ４６ｂ 水室 ４９ａ ルツボ φ 磁束 1, 21, 31, 41 Magnetic shielding member 2, 3, 42 Disk 4, 44 Frame 4a, 4b, 44a, 44b Flange part 5 Bolt 6 Nut 8 Cover 7, 47 Insulating particles 11, 45 Side wall 12, 48 Induction heating Coil 19, 29, 39 Heat insulation / stirrer 31a, 31b End face 32 Copper plate 46 Bottom plate 46b Water chamber 49a Crucible φ Magnetic flux
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｈ０５Ｂ 6/30 Ｈ０５Ｂ 6/30 (72)発明者 綾田 研三 兵庫県加古川市尾上町池田字池田開拓 2222番地１株式会社神戸製鋼所 加古川 研究地区内 (56)参考文献 特開 平５−38555（ＪＰ，Ａ) 特開 平４−220149（ＪＰ，Ａ) 特開 平６−277805（ＪＰ，Ａ) 特開 平１−181954（ＪＰ，Ａ) 特開 昭62−104656（ＪＰ，Ａ) 特開 平２−287091（ＪＰ，Ａ) 特開 平６−251864（ＪＰ，Ａ) 特開 平４−323314（ＪＰ，Ａ) 特開 平３−67989（ＪＰ，Ａ) 特開 平４−333351（ＪＰ，Ａ) 特開 昭61−182859（ＪＰ，Ａ) 特開 平７−280452（ＪＰ，Ａ) 特開 平４−59931（ＪＰ，Ａ) 実開 平４−53199（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B22D 11/041 B22D 11/04 311 B27B 17/00 B27D 11/06 H05B 6/30 ────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 7 Identification code FI H05B 6/30 H05B 6/30 (72) Inventor Kenzo Ayata 2222 Ikeda Ikeda Ikeda, Onoe-cho, Kakogawa-shi, Hyogo Kobe Co., Ltd. Steel Works Kakogawa Research Area (56) References JP-A-5-38555 (JP, A) JP-A-4-220149 (JP, A) JP-A-6-277805 (JP, A) JP-A-1-181954 (JP, A) JP-A-62-104656 (JP, A) JP-A-2-287910 (JP, A) JP-A-6-251864 (JP, A) JP-A-4-323314 (JP, A) JP-A-3-67989 (JP, A) JP-A-4-333351 (JP, A) JP-A-61-182859 (JP, A) JP-A-7-280452 (JP, A) JP-A-4-59931 ( JP, A) JP-A 4-53199 (JP, U) (58) Fields surveyed (Int. Cl. 7 , (DB name) B22D 11/041 B22D 11/04 311 B27B 17/00 B27D 11/06 H05B 6/30
Claims (7)
と、保温・撹拌部と、鋳造部と、引抜き部と、高周波電
源部と、制御部とを含んで成る連続鋳造装置として；前
記保温・撹拌部は冷却水通路が内部に設けられスリット
を介して周方向に隣接する複数のセグメントにより形成
され上下に延在する筒状の側壁と；該側壁の外周部に所
定の間隔を有して螺旋状に巻回され前記高周波電源部か
らケーブルを介して高周波電流が通電され内部が冷却水
通路とされた中空管状の誘導加熱コイルと；前記側壁の
上端部に連続して固定され内径が上方ほど広くなる倒立
中空円錐または角錐の台形部を含むカバーと；前記側壁
の外周の上方と下方に水平に配置され前記誘導加熱コイ
ルの外周より大きな寸法の外周を有する上、下の円板ま
たは多角板と；前記誘導加熱コイルのさらに外周側に所
定の間隔を有して配置され、円環状または多角形環状で
前記の上、下の円板または多角板の外端部間を支持する
フレームと；を有し、該フレームと該フレームの上、下
に配置された円板または多角板とが連結された連続鋳造
装置において：前記のカバーの全体または一部と、フレ
ームとが鋼製であり；前記保温・撹拌部にはさらに、前
記誘導加熱コイルの外周と前記フレームの内周との間に
それぞれ所定の間隔を保って配置され、軸方向では前記
の上、下の円板または多角板の間に把持された積層電磁
鋼板またはフェライトの磁性材料製の磁気遮断部材を有
し、 前記電源部から前記誘導加熱コイルに通電されて発生す
る交番磁界の磁束が前記磁気遮断部材に捕捉されて、該
磁気遮断部材の外周側への磁束の漏洩が防止されること
を特徴とする磁束遮断装置を有する誘導加熱による連続
鋳造装置。1. A continuous casting apparatus comprising: a material to be melted supply unit, an induction heating coil, a heat keeping / stirring unit, a casting unit, a drawing unit, a high frequency power supply unit, and a control unit; The agitating section has a cylindrical side wall which is formed by a plurality of segments which are provided with a cooling water passage therein and which are circumferentially adjacent to each other via a slit and which extends vertically; a predetermined interval is provided at the outer peripheral portion of the side wall; A hollow tubular induction heating coil spirally wound and supplied with a high-frequency current from the high-frequency power supply unit via a cable to form a cooling water passage therein; and an inner diameter continuously fixed to the upper end of the side wall. A cover including a trapezoidal portion of an inverted hollow cone or a pyramid that becomes wider upward, and upper and lower disks that are horizontally arranged above and below the outer circumference of the side wall and have a larger outer circumference than the outer circumference of the induction heating coil, or A polygonal plate; A frame disposed at a predetermined interval further around the outer circumference of the induction heating coil and supporting between the outer ends of the upper and lower disks or polygonal plates in an annular or polygonal annular shape; A continuous casting apparatus in which the frame and a disk or a polygonal plate arranged above and below the frame are connected: the whole or a part of the cover and the frame are made of steel; The stirring unit is further disposed at a predetermined interval between the outer periphery of the induction heating coil and the inner periphery of the frame, and is held between the upper and lower disks or polygonal plates in the axial direction. It has a magnetic interrupting member made of a magnetic material of laminated electromagnetic steel sheets or ferrite, and the magnetic flux of an alternating magnetic field generated by being energized from the power supply unit to the induction heating coil is captured by the magnetic interrupting member, Magnetic flux leakage to the outer circumference A continuous casting device by induction heating having a magnetic flux cut-off device characterized in that leakage is prevented.
前記誘導加熱コイル側が開いたコの字形で、前記誘導加
熱コイルの上方、下方および外周側を包囲して配置され
ている請求項１記載の磁束遮断装置を有する誘導加熱に
よる連続鋳造装置。2. The magnetic shielding member has a U-shaped cross section in the axial direction with the induction heating coil side open, and is arranged so as to surround the upper, lower and outer peripheral sides of the induction heating coil. A continuous casting apparatus by induction heating having the magnetic flux cut-off device as described in the above.
直立の円筒形または多角筒形であり、前記誘導加熱コイ
ルの外周側を包囲して配置されている請求項１記載の磁
束遮断装置を有する誘導加熱による連続鋳造装置。3. The magnetic flux interrupting device according to claim 1, wherein the magnetic interrupting member has an upright cylindrical or polygonal cylindrical cross section in the axial direction, and is arranged so as to surround an outer peripheral side of the induction heating coil. Continuous casting apparatus by induction heating having
で、前記誘導加熱コイルの外周側の周方向に所定の等し
い間隔で複数個が配置され、前記磁気遮断部材のそれぞ
れの周方向の両端面が下端に足部を有する銅板により固
定され、それぞれの磁気遮断部材間の部分が解放された
請求項１記載の磁束遮断装置を有する誘導加熱による連
続鋳造装置。4. The magnetic shielding member has a rectangular cross section in the axial direction, and a plurality of magnetic shielding members are arranged at predetermined equal intervals in a circumferential direction on an outer peripheral side of the induction heating coil. 2. A continuous casting apparatus by induction heating having a magnetic flux shielding device according to claim 1, wherein both end surfaces are fixed by a copper plate having a foot portion at a lower end, and a portion between the respective magnetic shielding members is released.
端部と連続する底壁とにより囲まれた内部に被溶解材料
が装入されて溶解を行う溶解室と、この溶解室の外周側
に巻回された誘導加熱コイルを有する誘導溶解炉におい
て；前記誘導加熱コイルの少なくとも外周側を包囲して
配置され、該誘導加熱コイルと所定の間隔を保って配置
された積層電磁鋼板またはフェライトの磁性部材製の磁
気遮断部材による磁束遮断装置を有する誘導加熱による
溶解炉。5. A melting chamber in which a material to be melted is charged and melted by being enclosed by an annular vertically extending side wall and a bottom wall continuous with a lower end of the side wall, and a melting chamber of the melting chamber. In an induction melting furnace having an induction heating coil wound on the outer peripheral side; a laminated electromagnetic steel sheet disposed so as to surround at least the outer peripheral side of the induction heating coil and disposed at a predetermined distance from the induction heating coil; or A melting furnace by induction heating having a magnetic flux blocking device using a magnetic blocking member made of a ferrite magnetic member.
水通路を内部に有し周方向に所定の間隔を保って上下に
延在するスリットを介して隣接して配置され上下に延在
する筒状の側壁と、冷却水室を有して前記側壁の下端と
一体化された複数の底板とにより構成されるコールドウ
ォール溶解炉であり、前記の磁気遮断部材は軸方向断面
がコの字形で、前記誘導加熱コイルの上方、下方および
外周側を包囲してコの字形に配置されている請求項５記
載の磁束遮断装置を有する誘導加熱による溶解炉。6. The induction melting furnace, wherein the melting chamber has a cooling water passage therein, and is arranged adjacent to each other through a slit extending vertically at predetermined intervals in a circumferential direction and extending vertically. A cold wall melting furnace comprising a cylindrical side wall present and a plurality of bottom plates having a cooling water chamber and integrated with a lower end of the side wall, wherein the magnetic shut-off member has a coaxial section. 6. A melting furnace by induction heating having a magnetic flux cut-off device according to claim 5, which is arranged in a U-shape so as to surround the upper, lower and outer peripheral sides of the induction heating coil.
ックスなどの耐火材料性であり、前記の磁気遮断部材は
直立の円筒形または多角筒形で前記誘導加熱コイルの外
周を囲んで配置されている請求項５記載の磁束遮断装置
を有する誘導加熱による溶解炉。7. The induction melting furnace, wherein the melting chamber is made of a refractory material such as ceramics, and the magnetic shut-off member is arranged in an upright cylindrical or polygonal cylindrical shape so as to surround an outer periphery of the induction heating coil. A melting furnace by induction heating having the magnetic flux cut-off device according to claim 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06317717A JP3122321B2 (en) | 1994-11-29 | 1994-11-29 | Continuous casting equipment and melting furnace by induction heating with magnetic flux interruption device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06317717A JP3122321B2 (en) | 1994-11-29 | 1994-11-29 | Continuous casting equipment and melting furnace by induction heating with magnetic flux interruption device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08155591A JPH08155591A (en) | 1996-06-18 |
| JP3122321B2 true JP3122321B2 (en) | 2001-01-09 |
Family
ID=18091256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06317717A Expired - Fee Related JP3122321B2 (en) | 1994-11-29 | 1994-11-29 | Continuous casting equipment and melting furnace by induction heating with magnetic flux interruption device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3122321B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2704883T3 (en) * | 2011-03-14 | 2019-03-20 | Consarc Corp | Cool electric induction crucible with open bottom for use in electromagnetic casting of ingots and method for casting in the crucible |
| FR3115650B1 (en) | 2020-10-23 | 2022-11-11 | Orano Cycle | COMPACT AND LIGHTWEIGHT ELECTROMAGNETIC SHIELDING FOR HIGH POWER INDUCTOR |
| CN112605352B (en) * | 2020-10-27 | 2022-07-01 | 佛山市三水凤铝铝业有限公司 | Casting method of aluminum alloy cast rod |
| CN117336909B (en) * | 2023-11-30 | 2024-02-09 | 华中科技大学 | Device and method for improving heating uniformity and heating efficiency of continuous casting and rolling slab |
-
1994
- 1994-11-29 JP JP06317717A patent/JP3122321B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08155591A (en) | 1996-06-18 |
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