JP3407775B2 - Floating melting furnace - Google Patents
Floating melting furnaceInfo
- Publication number
- JP3407775B2 JP3407775B2 JP22759895A JP22759895A JP3407775B2 JP 3407775 B2 JP3407775 B2 JP 3407775B2 JP 22759895 A JP22759895 A JP 22759895A JP 22759895 A JP22759895 A JP 22759895A JP 3407775 B2 JP3407775 B2 JP 3407775B2
- Authority
- JP
- Japan
- Prior art keywords
- cooling water
- hole
- melting furnace
- plug
- truncated cone
- 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.)
- Expired - Lifetime
Links
Landscapes
- General Induction Heating (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、溶解金属を底部から
出湯する底部出湯式の浮揚溶解炉に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bottom-discharging type levitation melting furnace for discharging molten metal from the bottom.
【０００２】[0002]
【従来の技術】図４は従来例の構成図を示す。この図４
において、１は良導電金属製のるつぼ、２は誘導加熱コ
イル３に電力を供給する電源、４は金属溶湯、５はるつ
ぼ底部の出湯穴、６は出湯穴５を塞ぐ耐火物の栓を示
す。この図４において、良導電金属製のるつぼ１は有底
の円筒状に形成されその底部に溶湯を出す出湯穴５を有
し、円筒状の胴部には、放射状に略等間隔で縦長のスリ
ットが設けられて、スリット部分でるつぼ１が周方向に
分割された構造になっている。また、るつぼの外径側に
巻回された誘導コイル３はるつぼ内の金属を溶かし溶湯
４にするとともに、溶湯４を水平方向に収縮させる電磁
力と、浮揚させる電磁力とを与える。2. Description of the Related Art FIG. 4 is a block diagram of a conventional example. This Figure 4
In FIG. 1, 1 is a crucible made of a good conductive metal, 2 is a power source for supplying electric power to the induction heating coil 3, 4 is molten metal, 5 is a tap hole at the bottom of the crucible, and 6 is a refractory plug that closes the tap hole 5. . In FIG. 4, a crucible 1 made of a good conductive metal is formed in a cylindrical shape having a bottom, and has a tap hole 5 through which molten metal is discharged at the bottom thereof. A slit is provided, and the crucible 1 is divided in the circumferential direction at the slit portion. Further, the induction coil 3 wound around the outer diameter side of the crucible melts the metal in the crucible to form the molten metal 4, and gives an electromagnetic force for contracting the molten metal 4 in the horizontal direction and an electromagnetic force for levitating.
【０００３】耐火物の栓６は、溶解初期に少量の金属が
溶け出して、その少量の溶湯が浮揚力を受けて浮揚する
ほどの量に達しない場合に、少量の溶湯４が出湯穴５か
ら落下する恐れがあるので、これを防止するために使用
される。また、溶解中に、電源２の故障による遮断等に
より浮揚力が失われた場合に、溶湯４が出湯穴５から落
下するのを防止するために使用される。The refractory stopper 6 has a small amount of molten metal 4 that elutes at the initial stage of melting, and when a small amount of the molten metal does not reach the amount of being floated by the levitation force, a small amount of molten metal 4 emerges from the tap hole 5. It is used to prevent this, as it can fall off. It is also used to prevent the molten metal 4 from dropping from the tap hole 5 when the buoyancy is lost due to interruption of the power source 2 due to a failure during melting.
【０００４】[0004]
【発明が解決しようとする課題】従来例では、溶湯が耐
火物の栓に接触した場合に、耐火物が溶湯中に混入して
溶湯の純度を低下させる問題があった。栓を無くした場
合は、耐火物が溶湯中に混入するのを防げるが、溶解中
に溶湯が落下する恐れがあり危険である。この発明の目
的は、溶湯が栓に接触した場合でも、溶湯中に溶け込ま
ない栓を提供することにある。In the conventional example, when the molten metal comes into contact with the plug of the refractory material, the refractory material is mixed into the molten metal to lower the purity of the molten metal. When the plug is removed, refractory can be prevented from being mixed into the molten metal, but it is dangerous because the molten metal may fall during melting. An object of the present invention is to provide a stopper that does not melt into the melt even when the melt contacts the stopper.
【０００５】[0005]
【課題を解決するための手段】発明１は、有底の円筒状
に形成されその底部に溶湯を出す出湯穴、および円筒状
部に放射状に略等間隔で設けられた縦長のスリットを有
する良導電金属製のるつぼと、るつぼの外径側に設けら
れた誘導コイルとを備えた浮揚溶解炉において、出湯穴
を塞ぐ栓は、水冷式銅製の栓である浮揚溶解炉とする。Means for Solving the Problems The invention 1 is good in that it has a tap hole for forming a molten metal at the bottom thereof, which is formed in a cylindrical shape with a bottom, and vertically long slits radially provided at substantially equal intervals in the cylindrical portion. In a levitation melting furnace having a crucible made of a conductive metal and an induction coil provided on the outer diameter side of the crucible, the plug for closing the tap hole is a levitation melting furnace which is a water-cooled copper plug.
【０００６】発明２は、発明１において、栓に冷却水を
導く冷却水導管を設け、この冷却水導管は、給排水路が
同芯円状に配された二重管である浮揚溶解炉とする。発
明３は、発明１または２において、栓と栓に冷却水を導
く冷却水導管との接続はねじ込み式である浮揚溶解炉と
する。A second aspect of the present invention is the levitation melting furnace according to the first aspect, wherein a cooling water conduit for introducing cooling water to the stopper is provided, and the cooling water conduit is a double tube in which the water supply and drainage channels are concentrically arranged. . A third aspect of the present invention is the levitation melting furnace according to the first or second aspect, in which the connection between the stopper and the cooling water conduit that guides the cooling water to the stopper is a screw type.
【０００７】発明４は、発明１〜３のいずれかにおい
て、栓は、先端部に近づくに従って外径が細くなる円錐
台と、円錐台の下端に円錐台の下端部より外径が大きい
円柱とから構成され、円錐台部分の内部には冷却水を通
水する孔を穿孔し、円柱部分には栓に冷却水を導く冷却
水導管をねじ込むねじ穴を穿孔し、円錐台部分の孔とね
じ穴とが繋がるように形成した浮揚溶解炉とする。A fourth aspect of the present invention is the plug according to any one of the first to third aspects, in which the plug has a truncated cone whose outer diameter becomes smaller toward the tip, and a cylinder having a lower outer diameter than the lower end of the truncated cone at the lower end of the truncated cone. A hole for passing cooling water is drilled inside the truncated cone part, and a screw hole for screwing a cooling water conduit that guides the cooling water to the stopper is drilled in the cylindrical part. The levitation melting furnace is formed so as to connect with the holes.
【０００８】発明５は、発明４において、円錐台部分の
内部は冷却水を通水する円錐形の孔を穿孔し、二重管構
造の冷却水導管の内管の先端部分を円錐形にするととも
に栓の円錐台部分の円錐形に穿孔された孔に挿入して円
錐形に穿孔された孔との隙間が冷却水の排水路になるよ
うにした浮揚溶解炉とする。According to a fifth aspect of the invention, in the fourth aspect, the inside of the truncated cone portion is provided with a conical hole through which cooling water is passed, and the tip portion of the inner pipe of the cooling water conduit having a double pipe structure is formed into a conical shape. At the same time, the levitation melting furnace is formed so that the gap between the conical hole of the truncated cone and the hole of the conical hole serves as a drainage channel for the cooling water.
【０００９】[0009]
【作用】栓は、熱伝導率が高い銅製にして水冷すること
により、少量の溶湯が接触しても溶湯が冷却されて凝固
するので、栓が溶けて溶湯に混入することはない。ま
た、栓が、先端部に近ずくに従って外径が細くなる円錐
台と円錐台の下端に円錐台の下端部より外径が大きい円
柱とを組み合わせた形状であり、円錐台部分の内部は冷
却水を通水する孔が穿孔され、円柱部分は冷却水導管を
ねじ込むねじ穴が穿孔され、円錐台部分の孔とねじ穴と
は繋がっている構造にすることにより、栓の先端部の直
径を円柱部分の、直径より小さくなり、栓の先端部での
渦電流の集中が防止できて、その部分での発熱が少なく
なる。The plug is made of copper having a high thermal conductivity and is water-cooled, so that even if a small amount of the molten metal comes into contact with the molten metal, the molten metal is cooled and solidified. Therefore, the plug is not melted and mixed into the molten metal. In addition, the stopper has a shape in which a truncated cone whose outer diameter becomes smaller as it approaches the tip and a lower end of the truncated cone are combined with a cylinder having an outer diameter larger than the lower end of the truncated cone, and the inside of the truncated cone is cooled. A hole for passing water is drilled, a screw hole for screwing a cooling water conduit is drilled for the cylindrical part, and the hole of the truncated cone part and the screw hole are connected to each other, so that the diameter of the tip of the stopper is increased. The diameter is smaller than the diameter of the cylindrical portion, eddy current can be prevented from concentrating at the tip of the plug, and heat generation at that portion is reduced.
【００１０】さらに、栓に冷却水を給排水する配管を二
重管にすることにより、栓及び栓に繋がる許容配管スペ
ースを有効に使用できるので給排水路の断面積が広くな
り、冷却効果があがる。なお、円錐台部分の内部は冷却
水を通水する円錐形の孔を穿孔するとともに、二重管の
内管の先端部を円錐形にして栓の先端近くまでとどくよ
うにすることにより、先端部まで冷却効果を効かせるこ
とができる。Further, since the pipe for supplying and draining the cooling water to the plug is a double pipe, the plug and the allowable piping space connected to the plug can be effectively used, so that the cross-sectional area of the water supply and drainage channel is widened and the cooling effect is enhanced. In addition, the inside of the truncated cone part has a conical hole through which cooling water passes, and the tip of the inner pipe of the double pipe is made conical so that it reaches near the tip of the stopper. The cooling effect can be applied to all parts.
【００１１】また、栓と配管との接続をねじ込み式にす
ることにより、栓の交換が容易になる。Further, the plug can be easily replaced by screwing the plug and the pipe together.
【００１２】図１は、第１の実施例の主要部の構成図を
示す。この図１において、従来例と同一の符号を付けた
部材はおおよそ同一の機能を有するのでその説明は省略
する。この図１において、６１は水冷式銅製の栓、６１
ａは栓６１の円錐台形部、６１ｂは栓６１の円柱形部、
６１ｃは栓６１の冷却水孔、６１ｄは栓６１のねじ部、
７は栓６１に冷却水を給排水する冷却水導管、８は漏水
を防止するＯリングを示す。FIG. 1 is a block diagram showing the main part of the first embodiment. In FIG. 1, members given the same reference numerals as those in the conventional example have approximately the same functions, and therefore their explanations are omitted. In FIG. 1, 61 is a water-cooled copper stopper, 61
a is a truncated cone portion of the stopper 61, 61b is a cylindrical portion of the stopper 61,
61c is a cooling water hole of the stopper 61, 61d is a threaded portion of the stopper 61,
Reference numeral 7 denotes a cooling water conduit for supplying and discharging cooling water to the stopper 61, and 8 denotes an O-ring for preventing water leakage.
【００１３】この図１において、栓６１は先端が細くな
る円錐台部６１ａに円柱形部６１ｂを組み合わせて、冷
却水孔６１ｃを円錐台部の内面に穿孔し、円柱形部６１
ｂにはＯリング８を挿入して、内管と外管とから成る二
重管構造の冷却水導管７の外管をねじ込み取付けするね
じ穴６１ｄが開けられた構造になっている。冷却水は内
管内を通って冷却水孔６１ｃに達し、その後矢印で示さ
れるように内管と外管との間の空間を通って流出する。
これにより円錐台部６１ａが冷却される。In FIG. 1, a plug 61 has a conical truncated portion 61a having a narrow tip and a cylindrical portion 61b combined with each other, and a cooling water hole 61c is bored on the inner surface of the truncated conical portion to form a cylindrical portion 61a.
An O-ring 8 is inserted in b, and a screw hole 61d for screwing and mounting the outer pipe of the cooling water conduit 7 having a double pipe structure including an inner pipe and an outer pipe is formed. The cooling water passes through the inside of the inner pipe to reach the cooling water hole 61c, and then flows out through the space between the inner pipe and the outer pipe as shown by the arrow.
As a result, the truncated cone portion 61a is cooled.
【００１４】図２は、第２の実施例の主要部の構成図を
示す。この図２が図１と異なる点は、二重管構造の冷却
水導管の内管の先端部分を円錐形にして、栓６１の円錐
台部分６１ａの円錐形に穿孔された孔６１ｃに挿入し
て、円錐形に穿孔された孔６１ｃとの隙間が冷却水の排
水路になるようにした点である。このようにすることに
より、冷却水は円錐形の冷却水孔６１ｃの先端まで送り
込まれるようになり、円錐台部６１ａの冷却効果が高ま
る。FIG. 2 is a block diagram showing the main part of the second embodiment. 2 is different from FIG. 1 in that the tip portion of the inner pipe of the cooling water conduit having the double pipe structure is made into a conical shape and is inserted into the conical hole 61c of the truncated cone portion 61a of the stopper 61. The gap between the conical hole 61c and the hole 61c serves as a drainage channel for the cooling water. By doing so, the cooling water is fed to the tip of the conical cooling water hole 61c, and the cooling effect of the truncated cone portion 61a is enhanced.
【００１５】図３はこの発明の栓を使用したるつぼの構
成断面図を示す。この図３において、良導電金属製のる
つぼ１は有底の円筒状に形成されその底部に溶湯を出す
出湯穴５を有し、円筒状の胴部には、放射状に略等間隔
で縦長のスリットが設けられて、スリット部分でるつぼ
１が周方向に分割された構造になっている。また、るつ
ぼの外径側に巻回された誘導コイル３は、るつぼ１に渦
電流を誘導するとともに、スリットからるつぼ１内に進
入した磁束によりるつぼ内の金属を溶かし溶湯４にする
とともに、溶湯４を水平方向に収縮させる電磁力と、浮
揚させる電磁力とを与える。FIG. 3 is a sectional view showing the construction of a crucible using the stopper of the present invention. In FIG. 3, a crucible 1 made of a good conductive metal is formed in a cylindrical shape having a bottom, and has a tap hole 5 through which molten metal is ejected at the bottom thereof. A slit is provided, and the crucible 1 is divided in the circumferential direction at the slit portion. The induction coil 3 wound on the outer diameter side of the crucible induces an eddy current in the crucible 1 and melts the metal in the crucible into a molten metal 4 by the magnetic flux entering the crucible 1 through the slit. An electromagnetic force that contracts 4 in the horizontal direction and an electromagnetic force that levitates the 4 are applied.
【００１６】また、スリットからるつぼ１内に進入した
磁束は出湯穴５を通過するのでそこにある金属（栓６
１）に渦電流を発生させる。この渦電流の発生量は誘導
コイル３から離れるほど少なくなるので、溶湯からの輻
射熱を受ける栓６１の先端では、その径を小さくして発
熱を少なくするようにしている。栓６１は、二重管構造
の冷却水導管７から給排水されて冷却されており、溶解
初期に少量の金属が溶け出して、その少量の溶湯が浮揚
力を受けて浮揚するほどの量に達しない場合に、少量の
溶湯４が出湯穴５から落下する恐れがあるので、これを
防止するために使用される。また、溶解中に、電源２の
故障による遮断等により浮揚力が失われた場合に、溶湯
４が出湯穴５から落下するのを防止するために使用され
る。Further, since the magnetic flux that has entered the crucible 1 through the slit passes through the tap hole 5, the metal (plug 6)
An eddy current is generated in 1). Since the amount of generation of this eddy current decreases as the distance from the induction coil 3 increases, the diameter of the tip of the plug 61, which receives radiant heat from the molten metal, is reduced to reduce heat generation. The plug 61 is supplied and drained from the cooling water conduit 7 having a double pipe structure to be cooled, and a small amount of metal is melted out at the initial stage of melting, and the small amount of the molten metal reaches the amount of being floated by the levitation force. Otherwise, a small amount of the molten metal 4 may drop from the tap hole 5, and is used to prevent this. It is also used to prevent the molten metal 4 from dropping from the tap hole 5 when the buoyancy is lost due to interruption of the power source 2 due to a failure during melting.
【００１７】また、図示されていないが、栓６１はるつ
ぼ１から独立して、栓保持具に取り付けられており、溶
湯４を出湯させる際には栓６１をるつぼ１から抜いて出
湯の邪魔にならない位置に移動させるようにしている。Although not shown, the stopper 61 is attached to the stopper holder independently of the crucible 1. When the molten metal 4 is to be discharged, the stopper 61 is pulled out of the crucible 1 to interfere with the discharge. I am trying to move it to a position where it does not become.
【００１８】[0018]
【発明の効果】この発明によれば、溶湯中に栓が溶け込
まないので溶湯中に不純物か混入しないため高純度の金
属を溶解できる効果がある。また、水冷することによ
り、栓が高温に耐えるようになり融点が２２００Ｋ以上
の金属の溶解が可能になる。According to the present invention, since the stopper does not melt into the molten metal, impurities are not mixed in the molten metal, so that high-purity metal can be dissolved. Further, by cooling with water, the stopper can withstand a high temperature and a metal having a melting point of 2200K or more can be melted.
【００１９】さらに、栓をるつぼと独立して設けること
により、溶解中に栓を取り外して、るつぼを動かすこと
無く下穴から溶湯を取り出すことが可能になる。なお、
栓の先端を細くして、先端部への渦電流の発生を少なく
しているので、るつぼへの投入電力を大きくする際に、
栓の過熱が投入電力の制限にはならない。Further, by providing the stopper independently of the crucible, it becomes possible to remove the stopper during melting and take out the molten metal from the prepared hole without moving the crucible. In addition,
Since the tip of the stopper is made thinner to reduce the generation of eddy currents at the tip, when increasing the input power to the crucible,
Overheating of the stopper does not limit the input power.
【図１】第１の実施例の主要部分の構成図FIG. 1 is a configuration diagram of a main part of a first embodiment.
【図２】第２の実施例の主要部分の構成図FIG. 2 is a configuration diagram of a main part of a second embodiment.
【図３】この発明の栓を使用したるつぼの構成断面図FIG. 3 is a sectional view showing the configuration of a crucible using the stopper of the present invention.
【図４】従来例の構成図FIG. 4 is a block diagram of a conventional example
７ 冷却水導管 ８ Ｏリング ６１ 栓 ６１ａ 円錐台部 ６１ｂ 円柱形部 ６１ｃ 冷却水孔 ６１ｄ ねじ穴 7 Cooling water conduit 8 O-ring 61 stopper 61a truncated cone part 61b cylindrical part 61c Cooling water hole 61d screw hole
───────────────────────────────────────────────────── フロントページの続き (72)発明者 芦田 有 神奈川県川崎市川崎区田辺新田１番１号 富士電機株式会社内 (72)発明者 藤田 満 神奈川県川崎市川崎区田辺新田１番１号 富士電機株式会社内 (58)調査した分野(Int.Cl.7，ＤＢ名) H05B 6/32 F27B 14/04 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Ari Ashida 1-1 Tanabe Nitta, Kawasaki-ku, Kawasaki City, Kanagawa Prefecture Fuji Electric Co., Ltd. (72) Mitsuru Fujita 1 Tanabe Nitta, Kawasaki-ku, Kanagawa Prefecture No. 1 within Fuji Electric Co., Ltd. (58) Fields investigated (Int.Cl. 7 , DB name) H05B 6/32 F27B 14/04
Claims (5)
出す出湯穴、および円筒状部に放射状に略等間隔で設け
られた縦長のスリットを有する良導電金属製のるつぼ
と、るつぼの外径側に設けられた誘導コイルとを備えた
浮揚溶解炉において、出湯穴を塞ぐ栓は、水冷式銅製の
栓であることを特徴とする浮揚溶解炉。1. A crucible and a crucible made of a good conductive metal, which has a bottomed cylindrical shape and has a tap hole through which molten metal is discharged, and vertically elongated slits radially arranged at substantially equal intervals in the cylindrical section. In the levitation melting furnace having an induction coil provided on the outer diameter side of the levitation melting furnace, the plug for closing the tap hole is a water-cooled copper plug.
冷却水を導く冷却水導管を設け、この冷却水導管は、給
排水路が同芯円状に配された二重管であることを特徴と
する浮揚溶解炉。 2. The float melting furnace according to claim 1, wherein the stopper is provided.
A cooling water conduit for guiding the cooling water is provided, and this cooling water conduit is
The drainage channel is a double pipe arranged concentrically
Floating melting furnace.
炉において、栓と栓に冷却水を導く冷却水導管との接続
はねじ込み式であることを特徴とする浮揚溶解炉。 3. The levitation melting according to claim 1 or 2.
In the furnace, the connection between the plug and the cooling water conduit that guides the cooling water to the plug
Is a smelting type smelting furnace.
の浮揚溶解炉において、栓は、先端部に近づくに従って
外径が細くなる円錐台と、円錐台の下端に円錐台の下端
部より外径が大きい円柱とから構成され、円錐台部分の
内部には冷却水を通水する孔を穿孔し、円柱部分には栓
に冷却水を導く冷却水導管をねじ込むねじ穴を穿孔し、
円錐台部分の孔とねじ穴とが繋がるように形成したこと
を特徴とする浮揚溶解炉。 4. The method according to any one of claims 1 to 3.
In the levitation melting furnace of
A truncated cone with a smaller outer diameter and a lower end of the truncated cone at the lower end of the truncated cone
It is composed of a cylinder with an outer diameter larger than that of the
A hole for passing cooling water is drilled inside, and a plug is attached to the cylindrical part.
Drill a screw hole to screw the cooling water conduit that guides the cooling water to
Formed so that the hole of the truncated cone and the screw hole are connected
Floating and melting furnace.
錐台部分の内部は冷却水を通水する円錐形の孔を穿孔
し、二重管構造の冷却水導管の内管の先端部分を円錐形
にするとともに栓の円錐台部分の円錐形に穿孔された孔
に挿入して円錐形に穿孔された孔との隙間が冷却水の排
水路になるようにしたことを特徴とする浮揚溶解炉。 5. The levitation melting furnace according to claim 4, wherein
The inside of the frustum has a conical hole through which cooling water passes.
The tip of the inner pipe of the double-pipe cooling water conduit is conical
And a hole drilled into a conical shape in the truncated cone part of the stopper
The gap between the conical hole and the cooling water
A levitation melting furnace characterized by being designed as a water channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22759895A JP3407775B2 (en) | 1995-09-05 | 1995-09-05 | Floating melting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22759895A JP3407775B2 (en) | 1995-09-05 | 1995-09-05 | Floating melting furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0973980A JPH0973980A (en) | 1997-03-18 |
| JP3407775B2 true JP3407775B2 (en) | 2003-05-19 |
Family
ID=16863447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22759895A Expired - Lifetime JP3407775B2 (en) | 1995-09-05 | 1995-09-05 | Floating melting furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3407775B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110538967A (en) * | 2019-09-11 | 2019-12-06 | 浙江今飞摩轮有限公司 | Sprue spreader and casting mold |
-
1995
- 1995-09-05 JP JP22759895A patent/JP3407775B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0973980A (en) | 1997-03-18 |
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