JPH0678865B2 - Crucible induction furnace - Google Patents
Crucible induction furnaceInfo
- Publication number
- JPH0678865B2 JPH0678865B2 JP63145184A JP14518488A JPH0678865B2 JP H0678865 B2 JPH0678865 B2 JP H0678865B2 JP 63145184 A JP63145184 A JP 63145184A JP 14518488 A JP14518488 A JP 14518488A JP H0678865 B2 JPH0678865 B2 JP H0678865B2
- Authority
- JP
- Japan
- Prior art keywords
- crucible
- furnace
- induction heating
- water
- heating coil
- 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
Description
【発明の詳細な説明】 ［産業上の利用分野］ この発明は、るつぼを水冷銅体で形成したるつぼ形誘導
炉に関する。TECHNICAL FIELD The present invention relates to a crucible-type induction furnace in which a crucible is made of a water-cooled copper body.
［従来の技術］ 第４図は、「Proceedings of the FIFTHINTERNATIONAL
SYNPOSIUM ON ELECTROSLAG AND OTHERSPECIALMELTING T
ECNOROGIES」（1974年10月、米国ピッツバーグで開催）
に記載された水冷銅セグメントで炉壁を形成したるつぼ
形誘導炉の構造を示す図である。31はるつぼの炉壁を形
成している。内部に冷却水を通す水冷銅セグメント、32
は下面から水冷される銅製の炉底板、33は水冷セグメン
トの外周に設けられた誘導加熱コイルである。このるつ
ぼ形誘導炉に金属を装入し、誘導加熱コイル33に通電し
て金属を溶解すると、水冷銅セグメント31および炉底板
32に接した溶融金属34は凝固し、溶融金属を収容するス
カル（炉殻）35を形成する。そして、隣接する水冷銅セ
グメント間の隙間36を塞ぎ、溶融金属34が外部に漏れる
のを防ぐ。この形式のるつぼは、溶融金属の凝固殻でる
つぼ炉体を形成するので、るつぼ炉体から酸素が溶融金
属中に移行し、溶融金属を酸化することがないから、酸
化され易い金属を溶解するのに有利である。[Prior Art] Fig. 4 shows "Proceedings of the FIFTH INTERNATIONAL".
SYNPOSIUM ON ELECTROSLAG AND OTHERSPECIALMELTING T
ECNOROGIES "(held in Pittsburgh, USA in October 1974)
It is a figure which shows the structure of the crucible type induction furnace which formed the furnace wall by the water-cooled copper segment described in. 31 forms the furnace wall of the crucible. 32 water-cooled copper segments that pass cooling water inside
Is a furnace bottom plate made of copper that is water-cooled from the lower surface, and 33 is an induction heating coil provided on the outer periphery of the water-cooling segment. When a metal is charged into this crucible type induction furnace and the induction heating coil 33 is energized to melt the metal, the water-cooled copper segment 31 and the bottom plate of the furnace.
The molten metal 34 in contact with 32 solidifies to form a skull (furnace shell) 35 containing the molten metal. Then, the gap 36 between the adjacent water-cooled copper segments is closed to prevent the molten metal 34 from leaking to the outside. Since this type of crucible forms a crucible furnace body with a solidified shell of molten metal, oxygen from the crucible furnace body does not migrate into the molten metal and does not oxidize the molten metal, so it dissolves easily oxidizable metals. It is advantageous to
［発明が解決しようとする課題］ 従来の水冷銅セグメントで形成したるつぼ形誘導炉は、
下注ぎができないため鋳型に鋳込む場合、誘導加熱コイ
ルを含んだ炉全体の傾注装置が必要となり、また出湯を
鋳型に導くため樋が必要となる。このため、装置が複雑
となるとともに操作が煩雑になる。[Problems to be Solved by the Invention] A conventional crucible-type induction furnace formed of water-cooled copper segments is
When pouring into a mold because it cannot be poured downward, a tilting device for the entire furnace including an induction heating coil is required, and a gutter is required to guide the tapped water to the mold. Therefore, the device becomes complicated and the operation becomes complicated.
また、出湯された溶湯が樋を流れる間に温度が下がるの
で、溶湯の温度が十分高くないと鋳型湯道で凝固して湯
道詰まりを起こし易く、正常な鋳込み作業が行えなくな
る。In addition, since the temperature of the molten metal that has been discharged falls while flowing through the gutter, unless the temperature of the molten metal is sufficiently high, the molten metal is likely to solidify in the mold runner and clog the runner, making it impossible to perform normal casting work.
［課題を解決するための手段］ 本発明は、以上のような問題点を解決しようとするもの
で、 その一つは、炉壁および底部の注湯ノズルを、内部に冷
却水を通す水冷銅セグメントで形成したるつぼ体と、前
記炉壁の外周に設けた第１の誘導加熱コイルと、前記注
湯ノズルの外周に設けた第２の誘導加熱コイルとを備え
たことを特徴とするるつぼ形誘導炉であり、 他の一つは、炉壁および底部の注湯ノズルを、内部に冷
却水を通す誘導加熱用銅コイルで形成し、且つ、炉壁部
コイルを第１の誘導加熱コイルとし、注湯ノズル部コイ
ルを第２の誘導加熱コイルとしたことを特徴とするるつ
ぼ形誘導炉である。[Means for Solving the Problems] The present invention is intended to solve the above problems, and one of them is a water-cooled copper through which cooling water is passed through the pouring nozzles of the furnace wall and the bottom. A crucible shape comprising: a crucible body formed of segments; a first induction heating coil provided on the outer periphery of the furnace wall; and a second induction heating coil provided on the outer periphery of the pouring nozzle. The other is an induction furnace, and the other one is that the pouring nozzles on the furnace wall and the bottom are made of copper coils for induction heating through which cooling water is passed, and the furnace wall coil is used as the first induction heating coil. A crucible-type induction furnace characterized in that the pouring nozzle coil is a second induction heating coil.
［作用］ 本発明のるつぼ炉は、底部に注湯ノズルを有するため、
溶湯を鋳型に注湯する場合、るつぼを傾斜させることな
く注湯ノズルの真下に置かれた鋳型に、最短距離で注湯
することができる。特に、金属あるいは、その合金の特
性により高温にすることができない場合に、鋳込み作業
中に温度低下をきたすことなく、速やかに注湯できるの
で、鋳造品の欠陥がなくなり歩留まりが向上する。[Operation] Since the crucible furnace of the present invention has the pouring nozzle at the bottom,
When pouring the molten metal into the mold, the molten metal can be poured into the mold placed immediately below the pouring nozzle in the shortest distance without tilting the crucible. In particular, when the temperature cannot be raised to a high temperature due to the characteristics of the metal or its alloy, it is possible to quickly pour the molten metal without causing a temperature drop during the casting operation, so that there are no defects in the cast product and the yield is improved.
［実施例］ 本発明の実施例を図面に基ずいて以下に説明する。第１
図は、本発明の一つのるつぼ形誘導炉の縦断面図で、１
は内部に冷却水を通す水冷銅セグメントで、上部が炉壁
を、下部が注湯ノズルを形成するように曲げ成形されて
いる。そして、この水冷銅セグメント１複数個を組み立
ててるつぼ炉体を形成してある。４はるつぼ炉の炉壁２
の外周に配設された第１の誘導加熱コイルで、５はるつ
ぼ炉の注湯ノズル３の外周に配設された第２の誘導加熱
コイルである。[Embodiment] An embodiment of the present invention will be described below with reference to the drawings. First
FIG. 1 is a vertical sectional view of one crucible induction furnace of the present invention.
Is a water-cooled copper segment through which cooling water is passed, the upper part is bent and the lower part forms a pouring nozzle. A crucible furnace body is formed by assembling one or more water-cooled copper segments. 4 Furnace wall of crucible furnace 2
Is a first induction heating coil disposed on the outer periphery of the second induction heating coil 5 is disposed on the outer periphery of the pouring nozzle 3 of the crucible furnace.
第２図は、本発明の他の一つのるつぼ形誘導炉の縦断面
図で、８は内部に冷却水を通す水冷銅コイルで、るつぼ
炉の炉壁２と注湯ノズル３を形成している。そして、る
つぼ炉の炉壁２を形成する水冷銅コイルは第１の誘導加
熱コイル４として、また、るつぼ炉の注湯ノズル３を形
成する水冷銅コイルは第２の誘導加熱コイルとしての機
能を持たせている。FIG. 2 is a longitudinal sectional view of another crucible-type induction furnace according to the present invention, in which 8 is a water-cooled copper coil through which cooling water is passed to form the furnace wall 2 and the pouring nozzle 3 of the crucible furnace. There is. The water-cooled copper coil forming the furnace wall 2 of the crucible furnace functions as the first induction heating coil 4, and the water-cooled copper coil forming the pouring nozzle 3 of the crucible furnace functions as the second induction heating coil. I have it.
次に本発明のるつぼ形誘導炉の使用方法について以下に
説明する。るつぼ形誘導炉は、真空または不活性ガス雰
囲気に保持できる容器内に設置されている。るつぼ内に
チタン等の金属塊を投入し、第１の誘導加熱コイルに通
電して金属塊を溶解する。溶解した溶融金属はるつぼ底
部に流れ落ち、注湯ノズル３の小径に絞られた水冷銅セ
グメントまたは水冷銅コイルに接して凝固し、注湯ノズ
ル３の開口を閉塞する。その後、溶融金属の液面が上昇
するにしたがって、るつぼの炉壁２を形成する水冷銅セ
グメントまたは水冷銅コイルに接触する溶融金属は、炉
壁２の内側に凝固殻を形成し、ついには第１図、第２図
に示すようなスカル（炉殻）７が形成される。そして、
溶融金属６は、このスカル７内に保持される。その後、
スカル７内の溶融金属６を十分に攪拌し、成分の均質化
を計る。注湯する時は、注湯ノズル３の外周に設けられ
た第２の誘導加熱コイル５に通電して注湯ノズル３の開
口を閉塞している凝固殻を溶解する。これにより、注湯
可能となる。この際、最初に流出する溶湯は、底部の凝
固殻が溶解したものであり、品質的に好ましくない場合
は捨て湯とする。Next, a method of using the crucible induction furnace of the present invention will be described below. The crucible induction furnace is installed in a container that can be maintained in a vacuum or an inert gas atmosphere. A metal mass such as titanium is put into the crucible, and the first induction heating coil is energized to melt the metal mass. The melted molten metal flows down to the bottom of the crucible, contacts the water-cooled copper segment or the water-cooled copper coil having a small diameter of the pouring nozzle 3 and solidifies to close the opening of the pouring nozzle 3. Thereafter, as the liquid level of the molten metal rises, the molten metal contacting the water-cooled copper segment or water-cooled copper coil forming the furnace wall 2 of the crucible forms a solidified shell inside the furnace wall 2 and finally A skull (furnace shell) 7 as shown in FIGS. 1 and 2 is formed. And
The molten metal 6 is held in this skull 7. afterwards,
The molten metal 6 in the skull 7 is sufficiently stirred to homogenize the components. When pouring, the second induction heating coil 5 provided on the outer periphery of the pouring nozzle 3 is energized to melt the solidified shell that closes the opening of the pouring nozzle 3. This enables pouring. At this time, the molten metal that flows out first is the one in which the solidified shell at the bottom is melted, and is discarded when the quality is unfavorable.
実施例では、誘導加熱コイルを第１の誘導加熱コイルと
第２の誘導加熱コイルに分け、それぞれ別の電源から通
電するようにしてあるが、第１の誘導加熱コイルと第２
の誘導加熱コイルを通電切替え端子で接続し、一つの電
源から通電するようにしてもよい。In the embodiment, the induction heating coil is divided into a first induction heating coil and a second induction heating coil, and they are energized from different power sources, respectively.
The induction heating coil may be connected with a power switching terminal so that power is supplied from one power source.
また、本発明例では溶融金属で注湯ノズル３を閉塞する
ようにしてあるが、注湯ノズル３の口径を大きくしたい
場合には、溶融金属で閉塞することが困難となる。この
ような場合には、第３図に示すように予め作成した金属
栓９を注湯ノズル３に差し込んでおいてもよい。Further, in the example of the present invention, the molten metal is used to block the pouring nozzle 3, but when it is desired to increase the diameter of the pouring nozzle 3, it is difficult to block the molten metal with the molten metal. In such a case, a metal plug 9 made in advance as shown in FIG. 3 may be inserted into the pouring nozzle 3.
［発明の効果］ 本発明は、水冷銅セグメントまたは水冷銅コイルで形成
した注湯ノズルをるつぼ底部に設け、注湯ノズルの外周
に設けた第２の誘導加熱コイルの通電の切りまたは入り
により、注湯ノズルの閉塞または開口を行うようにした
から、傾注装置が不要となり、出湯作業中に溶湯の温度
降下が殆ど無くなる。従って、溶湯の温度をより高温に
しなくとも鋳込み作業が容易に行え、鋳造品の欠陥がな
くなり、歩留まりが向上する。[Advantages of the Invention] The present invention provides a pouring nozzle formed of a water-cooled copper segment or a water-cooled copper coil at the bottom of a crucible, and by turning on or off a second induction heating coil provided on the outer periphery of the pouring nozzle, Since the pouring nozzle is closed or opened, the tilting pouring device is unnecessary, and the temperature drop of the molten metal during the tapping operation is almost eliminated. Therefore, the casting operation can be easily performed without increasing the temperature of the molten metal, defects in the cast product are eliminated, and the yield is improved.
第１図は本発明の一実施例のるつぼ形誘導炉を示す縦断
面図、第２図は本発明の他の実施例のるつぼ形誘導炉を
示す縦断面図、第３図は本発明の一実施例のるつぼ形誘
導炉の注湯ノズルを金属栓で閉塞した状態を示す縦断面
図、第４図は従来のるつぼ形誘導炉を示す縦断面図であ
る。 １…水冷銅セグメント、２…炉壁、 ３…注湯ノズル、４…第１の誘導加熱コイル、 ５…第２の誘導加熱コイル、６…溶融金属、 ７…スカル、８…水冷銅コイル。FIG. 1 is a vertical sectional view showing a crucible induction furnace according to an embodiment of the present invention, FIG. 2 is a vertical sectional view showing a crucible induction furnace according to another embodiment of the present invention, and FIG. FIG. 4 is a vertical cross-sectional view showing a state in which the pouring nozzle of the crucible induction furnace of one embodiment is closed by a metal stopper, and FIG. 4 is a vertical cross-sectional view showing a conventional crucible induction furnace. DESCRIPTION OF SYMBOLS 1 ... Water cooling copper segment, 2 ... Furnace wall, 3 ... Pouring nozzle, 4 ... 1st induction heating coil, 5 ... 2nd induction heating coil, 6 ... Molten metal, 7 ... Skull, 8 ... Water cooling copper coil.
Claims (2)
却水を通す水冷銅セグメントで形成したるつぼ体と、前
記炉壁の外周に設けた第１の誘導加熱コイルと、前記注
湯ノズルの外周に設けた第２の誘導加熱コイルとを備え
たことを特徴とするるつぼ形誘導炉。Claim: What is claimed is: 1. A crucible body having a furnace wall and a bottom pouring nozzle made of a water-cooled copper segment through which cooling water is passed, a first induction heating coil provided on the outer periphery of the furnace wall, and the pouring tank. A crucible-type induction furnace, comprising: a second induction heating coil provided on the outer circumference of the nozzle.
却水を通す誘導加熱用銅コイルで形成し、且つ、炉壁部
コイルを第１の誘導加熱コイルとし、注湯ノズル部コイ
ルを第２の誘導加熱コイルとしたことを特徴とするるつ
ぼ形誘導炉。2. A pouring nozzle for the furnace wall and the bottom is formed of a copper coil for induction heating, through which cooling water is passed, and the furnace wall coil is used as a first induction heating coil. Is a second induction heating coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63145184A JPH0678865B2 (en) | 1988-06-13 | 1988-06-13 | Crucible induction furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63145184A JPH0678865B2 (en) | 1988-06-13 | 1988-06-13 | Crucible induction furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01314892A JPH01314892A (en) | 1989-12-20 |
| JPH0678865B2 true JPH0678865B2 (en) | 1994-10-05 |
Family
ID=15379369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63145184A Expired - Lifetime JPH0678865B2 (en) | 1988-06-13 | 1988-06-13 | Crucible induction furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0678865B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4652537B2 (en) * | 1999-10-28 | 2011-03-16 | 株式会社神戸製鋼所 | Method for melting titanium or titanium alloy scrap |
| JP2006153362A (en) * | 2004-11-30 | 2006-06-15 | Daido Steel Co Ltd | Metal melting and tapping device, and its casting device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4841403A (en) * | 1971-10-02 | 1973-06-18 |
-
1988
- 1988-06-13 JP JP63145184A patent/JPH0678865B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01314892A (en) | 1989-12-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3389208A (en) | Consumable electrode furnace for electroslag refining | |
| CN101748282A (en) | Electric slag liquid pouring method | |
| US5799721A (en) | Method of remelting metals to form an elongate portion and apparatus therefor | |
| US3608618A (en) | Electroslag ingot production | |
| JPH0678865B2 (en) | Crucible induction furnace | |
| US3610318A (en) | Electroslag ingot production | |
| JPH06263B2 (en) | Continuous casting method | |
| JPS5944141B2 (en) | Casting nozzle of continuous casting equipment | |
| JPH0520673B2 (en) | ||
| JPS6150065B2 (en) | ||
| US3455373A (en) | Apparatus for ultrahigh purity precision casting | |
| JPS5849179Y2 (en) | molten metal injection equipment | |
| JPS6340628B2 (en) | ||
| JPH0318979B2 (en) | ||
| CA1058378A (en) | Methods of adding reactive metals | |
| SU364231A1 (en) | Method of electroslag casting of ingots | |
| US3788381A (en) | Metal refining process | |
| US6558446B1 (en) | In situ electroslag refining hot start | |
| USRE29035E (en) | Methods of adding reactive metals to form a remelting electrode | |
| JPH10318679A (en) | Method and apparatus for melting and casting metal | |
| JPH08145571A (en) | Bottom pouring cold wall melting furnace | |
| RU2071979C1 (en) | Apparatus for electroslag casting of steel and alloys | |
| US3952792A (en) | Method and apparatus for casting a plurality of ingots | |
| SU585220A1 (en) | Method of refining metal melts | |
| JPH0791844A (en) | Metal melting method and melting furnace |