JP3304009B2 - Vacuum furnace for metal melting - Google Patents
Vacuum furnace for metal meltingInfo
- Publication number
- JP3304009B2 JP3304009B2 JP34536593A JP34536593A JP3304009B2 JP 3304009 B2 JP3304009 B2 JP 3304009B2 JP 34536593 A JP34536593 A JP 34536593A JP 34536593 A JP34536593 A JP 34536593A JP 3304009 B2 JP3304009 B2 JP 3304009B2
- Authority
- JP
- Japan
- Prior art keywords
- gutter
- molten metal
- furnace
- melting
- vacuum
- 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 - Fee Related
Links
- 239000002184 metal Substances 0.000 title claims description 54
- 229910052751 metal Inorganic materials 0.000 title claims description 54
- 230000008018 melting Effects 0.000 title claims description 33
- 238000002844 melting Methods 0.000 title claims description 33
- 239000000956 alloy Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 238000010079 rubber tapping Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910000733 Li alloy Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 239000001989 lithium alloy Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
Landscapes
- Crucibles And Fluidized-Bed Furnaces (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、傾動式の真空溶解炉に
おいて、出湯された溶湯を受け溶湯排出部へ導く樋を予
熱する手段を備えた樋装置を出湯口近傍に配設した金属
溶解用真空炉に関し、特にＡ１ーＬｉ合金のような活性
な金属、合金の溶解に好適に使用されるものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal melting apparatus in a tilting type vacuum melting furnace, which is provided with a gutter device provided with means for preheating a gutter which guides a discharged molten metal to a molten metal discharge section in the vicinity of a tap hole. The present invention relates to a vacuum furnace for use, particularly one that is suitably used for melting active metals and alloys such as an A1-Li alloy.
【０００２】[0002]
【従来の技術】合金元素としてリチウムを含有するＡ１
ーＬｉ合金等活性な金属、合金の溶解は、酸化や水素ガ
ス吸収による耐火物との反応を防ぐため、真空雰囲気あ
るいはアルゴンガス、窒素ガス等の不活性雰囲気で行わ
れる。この溶解炉としては、通常炉体を傾動させて金属
溶湯を出湯する傾動式の真空溶解炉が使用される。傾動
式の真空溶解炉から出湯された溶湯は、炉の出湯口近傍
に配設された樋装置で受けてから溶湯排出口へ導かれ排
出口から排出されて溶湯処理が行われる。溶解が真空炉
中で行われても、出湯以降の雰囲気をクリーンに保たな
ければ溶融金属の酸化やガス吸収が生じるから、樋装置
には気密保持構造が採用され、樋装置を非酸化性雰囲気
にして出湯を行うようになっている。2. Description of the Related Art A1 containing lithium as an alloy element
Dissolution of an active metal or alloy such as a Li alloy is performed in a vacuum atmosphere or an inert atmosphere such as an argon gas or a nitrogen gas in order to prevent a reaction with a refractory due to oxidation or absorption of hydrogen gas. As the melting furnace, a tilting vacuum melting furnace is used in which a furnace body is tilted to discharge molten metal. The molten metal discharged from the tilting vacuum melting furnace is received by a gutter installed near the outlet of the furnace, then guided to the molten metal discharge port, discharged from the discharge port, and subjected to molten metal processing. Even if melting is performed in a vacuum furnace, if the atmosphere after tapping is not kept clean, oxidization of the molten metal and gas absorption will occur. The hot springs are made in the atmosphere.
【０００３】通常の溶解では、出湯に先立って溶湯を受
ける樋の予熱が必要であり、大気中での溶解作業におい
ては炭またはガスバーナーを使用して樋の予熱を行って
いる。しかしながら、上記真空溶解においては、不活性
雰囲気に保持された樋装置内で予熱を行わなければなら
ないため、燃焼用酸素がなくまた燃焼不純物が発生する
おそれも大きいので大気中での予熱方式は採用できな
い。このため樋の予熱を行わない場合には、高温の溶湯
が樋に接触することにより樋の割れや溶湯の飛散が生
じ、溶湯の温度降下に起因して鋳造不良を生じることも
ある。更に、樋中に水分があったような場合には活性金
属溶湯と接触して爆発を起こす危険性もある。In normal melting, preheating of a gutter receiving molten metal is required prior to tapping. In a melting operation in the atmosphere, charcoal or a gas burner is used to preheat the gutter. However, in the above vacuum melting, preheating must be performed in a gutter device maintained in an inert atmosphere, so there is no combustion oxygen and there is a high possibility that combustion impurities will be generated. Can not. For this reason, when the gutter is not preheated, the high-temperature molten metal comes into contact with the gutter, causing cracks in the gutter or scattering of the molten metal, which may cause poor casting due to a drop in the temperature of the molten metal. Furthermore, if there is moisture in the gutter, there is a danger of explosion due to contact with the active metal melt.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、特に金属溶
解用真空炉の樋装置に設置された樋の予熱の問題点を解
消するためになされたものであり、その目的は、気密に
保持され不活性雰囲気状態となっている樋装置中におい
ても確実に樋の予熱を行うことができる予熱手段を備え
た金属溶解用真空炉を提供するものである。SUMMARY OF THE INVENTION The present invention has been made in order to solve the problem of preheating of a gutter installed in a gutter of a vacuum furnace for melting metal, and an object of the present invention is to keep the airtight. It is an object of the present invention to provide a metal melting vacuum furnace provided with a preheating means capable of surely preheating a gutter even in a gutter device in an inert atmosphere state.
【０００５】[0005]
【課題を解決するための手段】本発明の金属溶解用真空
炉は、炉体を傾動させて金属溶湯を出湯する傾動式金属
溶解用真空炉において、炉の出湯口近傍に、出湯された
溶湯を受け溶湯排出口へ導く炉体の傾動に対して固定さ
れた樋を有する樋装置を配設し、樋の近傍にヒータを設
け、樋装置のうち炉体の傾動に対して固定されている溶
湯排出部に電流導入端子を取り付けて、電流導入端子か
ら前記ヒータに通電し樋の予熱を行うようにしたことを
特徴とするものである。SUMMARY OF THE INVENTION A vacuum furnace for metal melting according to the present invention is a tilting vacuum furnace for metal melting in which a furnace body is tilted to discharge molten metal. A gutter device having a gutter fixed to the tilt of the furnace body for receiving the molten metal to the molten metal discharge port is provided, a heater is provided near the gutter, and the gutter device is fixed to the tilt of the furnace body in the gutter device. The present invention is characterized in that a current introduction terminal is attached to the molten metal discharge portion, and the heater is energized from the current introduction terminal to preheat the gutter.
【０００６】[0006]
【作用】本発明の真空溶解炉は、樋装置内の樋の近傍に
ヒータを設け、ヒータに電流を通じて加熱し樋の予熱を
行うようにしたので、非酸化性雰囲気に保持された樋装
置内でも雰囲気を汚染することなく確実に樋を予熱する
ことができるものである。In the vacuum melting furnace of the present invention, a heater is provided in the vicinity of the gutter in the gutter, and the heater is heated by passing an electric current to preheat the gutter. However, the gutter can be reliably preheated without polluting the atmosphere.
【０００７】[0007]
【実施例】以下、本発明の実施例を図１ないし図３を参
照して詳細に説明する。金属溶解用真空炉は、図３に示
すように、真空蓋３を有する真空チャンバー１内に例え
ば高周波誘導加熱による溶解炉２が配置されている。真
空チャンバー１の両側には油圧シリンダ４が設けられ、
真空チャンバー１の先端側は回転軸５に支持されて油圧
シリンダ４の伸出により真空チャンバー１を回動させる
ようになっている。また真空チャンバー１の先端には、
内部に水平な樋７を設けた樋装置６が設けられ、真空チ
ャンバー１と共に傾動する溶解炉２の出湯口８から溶湯
が樋７に出湯されるようになっている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIGS. As shown in FIG. 3, in the vacuum furnace for metal melting, a melting furnace 2 by, for example, high-frequency induction heating is arranged in a vacuum chamber 1 having a vacuum lid 3. Hydraulic cylinders 4 are provided on both sides of the vacuum chamber 1,
The distal end side of the vacuum chamber 1 is supported by a rotating shaft 5 so as to rotate the vacuum chamber 1 by extending a hydraulic cylinder 4. At the tip of the vacuum chamber 1,
A gutter device 6 having a horizontal gutter 7 provided therein is provided, and the molten metal flows out of the gutter 7 from a tap hole 8 of the melting furnace 2 which tilts with the vacuum chamber 1.
【０００８】樋装置６は、図１および図２に示すよう
に、内部に樋７を有するドラム型のもので、溶湯導入部
９と溶湯排出部10と、この間に介在させたカップリング
機構11とで構成されている。出湯口８から出湯された溶
湯を受ける溶湯導入部９は溶解炉２の傾動とともに回動
し、溶湯排出部10は溶解炉２の傾動に対し固定されてい
る。樋７の基端側は溶湯排出部10に固定され、樋７の先
端側は回動する溶湯導入部９内に挿入されており、溶解
炉２の傾動に対して固定された状態となっている。また
樋７に出湯された溶湯は、樋７に導かれて樋装置６の溶
湯排出部10に至りこの基端側に設けられた溶湯排出口12
から排出される。また溶湯導入部９と溶湯排出部10との
間は、回動中にも樋装置６内の気密保持がなされるカッ
プリング機構11で連結されている。As shown in FIGS. 1 and 2, the gutter device 6 is of a drum type having a gutter 7 therein, and has a molten metal introduction part 9, a molten metal discharge part 10, and a coupling mechanism 11 interposed therebetween. It is composed of The molten metal inlet 9 for receiving the molten metal discharged from the tap 8 rotates with the tilt of the melting furnace 2, and the molten metal discharge unit 10 is fixed to the tilt of the melting furnace 2. The base end of the gutter 7 is fixed to the molten metal discharge section 10, and the tip end of the gutter 7 is inserted into the rotating molten metal introduction section 9, and is fixed against tilting of the melting furnace 2. I have. Further, the molten metal discharged from the gutter 7 is guided by the gutter 7 to reach the molten metal discharge portion 10 of the gutter device 6 and the molten metal discharge port 12 provided on the base end side.
Is discharged from Further, the molten metal introduction section 9 and the molten metal discharge section 10 are connected by a coupling mechanism 11 for maintaining the airtightness in the gutter device 6 during rotation.
【０００９】樋装置６内に設置された樋７の上部には、
電気で加熱される材料で形成されたヒータ14が樋７に沿
って設けられている。ヒータ14に電流を通じるための電
流導入端子15は、樋装置６の溶湯排出部10に取り付られ
ている。なお13は溶湯排出口12に取付けられた真空ゲー
トバルブである。[0009] Above the gutter 7 installed in the gutter device 6,
A heater 14 made of a material heated by electricity is provided along the gutter 7. A current introduction terminal 15 for passing a current through the heater 14 is attached to the molten metal discharge section 10 of the gutter device 6. Reference numeral 13 denotes a vacuum gate valve attached to the molten metal outlet 12.
【００１０】上記真空溶解炉において、溶解作業開始に
あたっては先ず真空チャンバー１内を真空に引いたの
ち、チャンバー１内に不活性ガスを封入し、不活性ガス
雰囲気中で溶解作業を行う。出湯に際しては、油圧シリ
ンダ４を作動させて回転軸５を中心として真空チャンバ
ー１とともに溶解炉２を傾動させ、出湯口８から樋装置
６の固定された樋７内に出湯する。出湯された溶湯は、
図１および図２に示すように樋７に導かれて樋装置６の
溶湯排出部10に至り溶湯排出口12から排出される。In the vacuum melting furnace, when starting the melting operation, the inside of the vacuum chamber 1 is first evacuated, then an inert gas is sealed in the chamber 1, and the melting operation is performed in an inert gas atmosphere. At the time of tapping, the melting cylinder 2 is tilted together with the vacuum chamber 1 about the rotating shaft 5 by operating the hydraulic cylinder 4, and tapping is performed from the tap 8 into the gutter 7 to which the gutter device 6 is fixed. The molten metal that has been poured is
As shown in FIG. 1 and FIG.
【００１１】一方、樋装置６内に設置された樋７の上部
に設けられたヒータ14は、電流導入端子15から通電され
て発熱し、この下方に設けた樋７が加熱され、予熱が行
なわれる。この予熱されて水分が蒸発した樋７に溶湯が
導かれるため、高温の溶湯が樋７に接触しても樋７の割
れや溶湯の飛散、水蒸気爆発を防止できると共に、溶湯
の温度降下が少なく鋳造不良を防止することができる。
なお真空チャンバー１および溶解炉２が傾動しても樋７
やヒータ14は回動することなく固定されているから、配
線は動くことがなく通電に支障を生じることはない。し
かも樋７の加熱は電気により行われるから、不活性雰囲
気中でも樋７の予熱が確実に行われ、しかもクリーンな
雰囲気が維持される。On the other hand, the heater 14 provided above the gutter 7 installed in the gutter device 6 is energized by the current introduction terminal 15 to generate heat, and the gutter 7 provided below is heated and preheated. It is. Since the molten metal is guided to the preheated gutter 7 in which the moisture has evaporated, even if the high-temperature molten metal comes into contact with the gutter 7, cracking of the gutter 7, scattering of the molten metal, and steam explosion can be prevented, and the temperature drop of the molten metal is small. Poor casting can be prevented.
Even if the vacuum chamber 1 and the melting furnace 2 are tilted, the gutter 7
Since the heater and the heater 14 are fixed without rotating, the wiring does not move and there is no trouble in energization. In addition, since the gutter 7 is heated by electricity, the gutter 7 is reliably heated even in an inert atmosphere, and a clean atmosphere is maintained.
【００１２】[0012]
【発明の効果】以上説明した如く本発明によれば、樋装
置内に設置された樋の予熱を不活性雰囲気中でしかもク
リーンな状態で行うことができ、特にＡ１ーＬｉ合金の
ような活性金属、合金の溶解用として有用な金属溶解用
真空炉を得ることができる。As described above, according to the present invention, it is possible to preheat a gutter installed in a gutter apparatus in an inert atmosphere and in a clean state. A metal melting vacuum furnace useful for melting metals and alloys can be obtained.
【図１】本発明の実施例による金属溶解用真空炉の樋装
置を示す要部正面図である。FIG. 1 is a front view of a main part showing a gutter device of a vacuum furnace for melting metal according to an embodiment of the present invention.
【図２】図１の樋装置を示す側面図である。FIG. 2 is a side view showing the gutter device of FIG.
【図３】本発明の金属溶解用真空炉を示す側面図であ
る。FIG. 3 is a side view showing the metal melting vacuum furnace of the present invention.
１ 真空チャンバー ２ 溶解炉 ３ 真空蓋 ４ 油圧シリンダ ５ 回転軸 ６ 樋装置 ７ 樋 ８ 出湯口 ９ 溶湯導入部 10 溶湯排出部 11 カップリング機構 12 溶湯排出口 13 真空ゲートバルブ 14 ヒータ 15 電流導入端子 DESCRIPTION OF SYMBOLS 1 Vacuum chamber 2 Melting furnace 3 Vacuum lid 4 Hydraulic cylinder 5 Rotating shaft 6 Gutter device 7 Gutter 8 Outlet 9 Molten introduction part 10 Molten discharge part 11 Coupling mechanism 12 Molten discharge port 13 Vacuum gate valve 14 Heater 15 Current introduction terminal
フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) F27B 14/04 F27B 14/02 F27B 14/18 Continued on the front page (58) Fields surveyed (Int.Cl. 7 , DB name) F27B 14/04 F27B 14/02 F27B 14/18
Claims (1)
動式金属溶解用真空炉において、炉の出湯口近傍に、出
湯された溶湯を受け溶湯排出部へ導くための炉体の傾動
に対して固定された樋を有する樋装置を配設し、樋の近
傍にヒータを設け、樋装置のうち炉体の傾動に対し固定
された溶湯排出部に電流導入端子を取り付けて、電流導
入端子から前記ヒータに通電し樋の予熱を行うようにし
たことを特徴とする金属溶解用真空炉。In a tilting type metal melting vacuum furnace in which a furnace body is tilted to discharge molten metal, a tilting of the furnace body for guiding a discharged molten metal to a molten metal discharge section is performed near a discharge port of the furnace. A gutter device having a gutter fixed thereto is provided, a heater is provided in the vicinity of the gutter, and a current introduction terminal is attached to a molten metal discharge portion of the gutter device fixed to the tilt of the furnace body. Characterized in that the heater is energized to preheat the gutter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34536593A JP3304009B2 (en) | 1993-12-21 | 1993-12-21 | Vacuum furnace for metal melting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34536593A JP3304009B2 (en) | 1993-12-21 | 1993-12-21 | Vacuum furnace for metal melting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07180969A JPH07180969A (en) | 1995-07-18 |
| JP3304009B2 true JP3304009B2 (en) | 2002-07-22 |
Family
ID=18376109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34536593A Expired - Fee Related JP3304009B2 (en) | 1993-12-21 | 1993-12-21 | Vacuum furnace for metal melting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3304009B2 (en) |
-
1993
- 1993-12-21 JP JP34536593A patent/JP3304009B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07180969A (en) | 1995-07-18 |
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