JPH0820826A - Vacuum degassing method and ladle type vacuum degassing apparatus - Google Patents
Vacuum degassing method and ladle type vacuum degassing apparatusInfo
- Publication number
- JPH0820826A JPH0820826A JP25299794A JP25299794A JPH0820826A JP H0820826 A JPH0820826 A JP H0820826A JP 25299794 A JP25299794 A JP 25299794A JP 25299794 A JP25299794 A JP 25299794A JP H0820826 A JPH0820826 A JP H0820826A
- Authority
- JP
- Japan
- Prior art keywords
- ladle
- molten metal
- hot water
- pipe
- vacuum degassing
- 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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Links
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- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は金属の溶湯を真空脱ガ
スする方法、および真空脱ガスをおこなう取鍋式真空脱
ガス装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for vacuum degassing a molten metal and a ladle type vacuum degassing apparatus for performing vacuum degassing.
【０００２】[0002]
【従来の技術】たとえばアルミニウム、銅、亜鉛などの
非鉄金属あるいはその合金などを鋳造する際に、鋳造製
品の欠陥を除去し高品質化をはかるために、溶湯を収容
した減圧槽内を真空にし溶湯中の有害ガスを吸引除去す
る真空脱ガス法が、採用されるようになった。ところが
従来の真空脱ガス法においては、一般に先ず溶解炉から
開放状態の取鍋内に大気中で溶湯を注湯し、この溶湯を
入れた取鍋を運搬して減圧槽内に収容し、真空脱ガス
後、取鍋を取出して鋳造装置等の溶湯使用装置まで運搬
し、鋳造装置の保持炉へ取鍋を傾動させて配湯したり、
大型鋳物の場合等は直接鋳型への注湯を取鍋を傾動させ
ておこなっている。2. Description of the Related Art When casting a non-ferrous metal such as aluminum, copper or zinc, or an alloy thereof, for example, in order to remove defects in the cast product and to improve the quality, a vacuum tank containing the molten metal is evacuated. A vacuum degassing method, which sucks and removes harmful gas in molten metal, has been adopted. However, in the conventional vacuum degassing method, generally, the molten metal is first poured from the melting furnace into the open ladle in the atmosphere, and the ladle containing the molten metal is transported and stored in a decompression tank, and the vacuum is removed. After degassing, take out the ladle, transport it to the molten metal using equipment such as casting equipment, tilt the ladle to the holding furnace of the casting equipment, distribute hot water,
In the case of large castings, the molten metal is poured directly into the mold and the pan is tilted.
【０００３】このため従来の真空脱ガス法においては、
取鍋への注湯時や運搬中および溶湯使用装置部における
注湯時などに、溶湯の大気との接触や大気の巻込みによ
り、溶湯が酸化しやすく、また溶湯が大気中の水素ガス
を吸収しやすく（特に高湿度のとき著しい）、折角脱ガ
スをおこなっていながら溶湯品質が劣化し、鋳造製品中
に気泡が発生して強度が低下するという問題があった。
また減圧槽への取鍋の収容、取出しにも手間がかかり、
取鍋を収容する大容量の減圧槽内を減圧するのに時間が
かかり、真空排気装置も大容量のものが必要であった。Therefore, in the conventional vacuum degassing method,
When pouring into a ladle, during transportation, or when pouring in a device that uses the molten metal, the molten metal is likely to oxidize due to contact with the atmosphere or entrainment of the atmosphere, and the molten metal may also absorb hydrogen gas in the atmosphere. There is a problem that it is easily absorbed (particularly when the humidity is high), the quality of the molten metal deteriorates while performing degassing, and bubbles are generated in the cast product to lower the strength.
In addition, it takes time to store and remove the ladle in the decompression tank,
It took time to depressurize the large-capacity decompression tank that accommodates the ladle, and the vacuum exhaust device also needed to have a large capacity.
【０００４】[0004]
【発明が解決しようとする課題】この発明は上記従来の
問題点を解決するもので、溶湯の取鍋内への注湯から真
空脱ガス後の溶湯の溶湯使用装置への配湯までの間にお
ける、溶湯の大気との接触や大気の巻込みを減らして、
溶湯の品質向上および真空脱ガスの生産性向上をはかる
ことができ、真空排気装置も小容量のもので済む真空脱
ガス方法および取鍋式真空脱ガス装置を提供しようとす
るものである。SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problems of the prior art, from the pouring of the molten metal into the ladle to the distribution of the molten metal to the device using the molten metal after vacuum degassing. In order to reduce the contact of molten metal with the atmosphere and the entrainment of the atmosphere,
It is an object of the present invention to provide a vacuum degassing method and a ladle type vacuum degassing apparatus which can improve the quality of molten metal and improve the productivity of vacuum degassing, and require only a small capacity of the vacuum exhaust device.
【０００５】[0005]
【課題を解決するための手段】この出願の第１の発明の
真空脱ガス方法は、取鍋本体に被せた蓋を貫通するスト
−クをそなえた密閉式の取鍋の前記スト−クと溶解炉と
を吸湯管により接続し、前記取鍋内を減圧して前記溶解
炉内の溶湯を前記取鍋内に吸引し、前記溶湯を所定量吸
引後密閉した前記取鍋内を減圧して該溶湯の真空脱ガス
をおこなったのち、前記取鍋内に酸化防止用ガスを封入
した状態で前記取鍋の運搬をおこない、溶湯使用装置と
前記スト−クとを配湯管により接続し、前記取鍋内に加
圧ガスを送入して前記溶湯を前記溶湯使用装置に加圧配
湯することを特徴とする。The vacuum degassing method of the first invention of the present application is the above-mentioned stowage of a closed-type ladle provided with a stow which penetrates a lid put on a ladle body. The melting furnace is connected by a hot water pipe, the inside of the ladle is depressurized, the molten metal in the melting furnace is sucked into the ladle, the molten metal is sucked by a predetermined amount, and the inside of the sealed ladle is depressurized. After vacuum degassing the molten metal, the ladle is transported while the antioxidant gas is enclosed in the ladle, and the molten metal using device and the stork are connected by a hot water pipe. It is characterized in that pressurized gas is fed into the ladle to distribute the molten metal under pressure to the molten metal using apparatus.
【０００６】第１の発明における酸化防止用ガスとして
は、窒素ガス、又はアルゴンやヘリウム等の不活性ガス
を使用することができる。As the oxidation preventing gas in the first invention, nitrogen gas or an inert gas such as argon or helium can be used.
【０００７】この出願の第２の発明の真空脱ガス方法
は、取鍋本体に被せた蓋を貫通するスト−クをそなえた
密閉式の取鍋の前記スト−クと溶解炉とを吸湯管により
接続し、前記取鍋内を減圧して前記溶解炉内の溶湯を前
記取鍋内に吸引し、前記溶湯を所定量吸引後密閉した前
記取鍋内を減圧して該溶湯の真空脱ガスをおこなったの
ち、前記取鍋内に乾燥空気を封入した状態で前記取鍋の
運搬をおこない、溶湯使用装置と前記スト−クとを配湯
管により接続し、前記取鍋内に加圧ガスを送入して前記
溶湯を前記溶湯使用装置に加圧配湯することを特徴とす
る。In the vacuum degassing method of the second invention of the present application, the stokes and melting furnace of a closed-type ladle having a stow penetrating a lid covered with a ladle body absorb water. It is connected by a pipe, the inside of the ladle is depressurized, the molten metal in the melting furnace is sucked into the ladle, the molten metal is sucked in a predetermined amount, and then the sealed ladle is depressurized to release the molten metal in vacuum. After gas is fed, the ladle is transported in a state where the ladle is filled with dry air, the molten metal using device and the stork are connected by a hot water pipe, and the ladle is pressurized. It is characterized in that gas is fed to distribute the molten metal under pressure to the molten metal using apparatus.
【０００８】この出願の第３の発明の真空脱ガス方法
は、取鍋本体に被せた蓋を貫通するスト−クをそなえた
密閉式の取鍋の前記スト−クと溶解炉とを吸湯管により
接続し、前記取鍋内を減圧して前記溶解炉内の溶湯を前
記取鍋内に吸引し、前記溶湯を所定量吸引後密閉した前
記取鍋内を減圧して該溶湯の真空脱ガスをおこなったの
ち、前記取鍋内を真空に維持した状態で前記取鍋の運搬
をおこない、溶湯使用装置と前記スト−クとを配湯管に
より接続し、前記取鍋内に加圧ガスを送入して前記溶湯
を前記溶湯使用装置に加圧配湯することを特徴とする。In the vacuum degassing method of the third invention of this application, a hot water is melted between the stalk and the melting furnace of a closed-type ladle having a stalk penetrating a lid placed on the ladle body. It is connected by a pipe, the inside of the ladle is depressurized, the molten metal in the melting furnace is sucked into the ladle, the molten metal is sucked in a predetermined amount, and then the sealed ladle is depressurized to release the molten metal in vacuum. After performing the gas, the ladle is transported in a state where the inside of the ladle is maintained in a vacuum, and the molten metal use device and the stork are connected by a hot water distribution pipe, and the pressurized gas in the ladle is used. Is fed and the molten metal is distributed under pressure to the molten metal using device.
【０００９】またこの出願の第４の発明の取鍋式真空脱
ガス装置は、取鍋本体に蓋を密閉開放自在に被せ、下端
部が前記取鍋本体内に開口し上端部に吸湯管と配湯管が
択一的に接続される吸配湯接続口をそなえたスト−ク
を、前記蓋に取付けるとともに、一端部が前記取鍋本体
の上部空間内に開口し他端部に真空排気装置に接続され
る排気接続口をそなえた排気管と、一端部が前記取鍋本
体の上部空間内に開口し他端部に加圧ガス供給装置に接
続される給気接続口をそなえた給気管とを、前記蓋また
は前記取鍋本体に取付けたことを特徴とする。Further, in the ladle type vacuum degassing apparatus of the fourth invention of this application, the ladle body is covered with a lid so that the lid can be freely opened and closed, the lower end portion is opened in the ladle body, and the hot water pipe is provided at the upper end portion. And a pipe with a hot and cold water distribution connection port to which the hot water distribution pipe is selectively connected are attached to the lid, and one end opens into the upper space of the ladle body and a vacuum is applied to the other end. An exhaust pipe provided with an exhaust connection connected to an exhaust device, and an air supply connection provided at one end opening into the upper space of the ladle body and the other end connected to a pressurized gas supply device. An air supply pipe is attached to the lid or the ladle body.
【００１０】この出願の第５の発明の取鍋式真空脱ガス
装置は、壁部に電熱ヒ−タを埋設した取鍋本体に蓋を密
閉開放自在に被せ、下端部が前記取鍋本体内に開口し上
端部に吸湯管と配湯管が択一的に接続される吸配湯接続
口をそなえたスト−クを、前記蓋に取付けるとともに、
一端部が前記取鍋本体の上部空間内に開口し他端部に真
空排気装置に接続される排気接続口をそなえた排気管
と、一端部が前記取鍋本体の上部空間内に開口し他端部
に加圧ガス供給装置に接続される給気接続口をそなえた
給気管とを、前記蓋または前記取鍋本体に取付けたこと
を特徴とする。In the ladle-type vacuum degassing device of the fifth invention of this application, the ladle body in which the electric heating heater is embedded in the wall is covered with a lid so that the lower end is inside the ladle body. Attached to the lid is a stork that has a hot and cold water distribution connection opening to which the hot water distribution pipe and the hot water distribution pipe are selectively connected at the upper end.
An exhaust pipe having one end opening in the upper space of the ladle body and the other end having an exhaust connection port connected to a vacuum exhaust device, and one end opening in the upper space of the ladle body, etc. An air supply pipe having an air supply connection port connected to a pressurized gas supply device at its end is attached to the lid or the ladle body.
【００１１】この発明において加圧ガスとしては、窒素
ガス、又はアルゴンやヘリウム等の不活性ガス、又は乾
燥空気などを使用することができる。In the present invention, the pressurized gas may be nitrogen gas, an inert gas such as argon or helium, or dry air.
【００１２】[0012]
【作用】この発明の真空脱ガス方法においては、溶解炉
内から取鍋への溶湯の給湯は吸湯管を介しての減圧吸引
により、また取鍋内から溶湯使用装置内への溶湯の配湯
は配湯管を介しての加圧配湯によりおこなわれるので、
注湯に伴う溶湯中への大気の巻込みが少ない。また真空
脱ガスは取鍋内を直接減圧することによりおこなうの
で、取鍋を大型の減圧槽内に装入、取出する必要はな
く、能率的に真空脱ガスがおこなえるうえ、真空排気装
置も小型少容量のもので済む。In the vacuum degassing method of the present invention, the molten metal is supplied from the melting furnace to the ladle by vacuum suction through the suction pipe, and the molten metal is distributed from the ladle to the molten metal using apparatus. Hot water is delivered by pressure distribution through the hot water distribution pipe,
There is little air entrainment in the molten metal when pouring. In addition, vacuum degassing is performed by directly depressurizing the inside of the ladle, so there is no need to load and unload the ladle into a large decompression tank.Vacuum degassing can be performed efficiently, and the vacuum exhaust device is small. Only a small capacity is required.
【００１３】また第１の発明においては、真空脱ガス後
の溶湯を収容した取鍋の運搬中には、取鍋内に封入した
酸化防止用ガスが溶湯と大気との接触を防止し、溶湯の
酸化および大気中の水素ガスの吸収を防止する。Further, in the first aspect of the present invention, during transportation of the ladle containing the molten metal after vacuum degassing, the antioxidant gas enclosed in the ladle prevents contact between the molten metal and the atmosphere, Of hydrogen and absorption of hydrogen gas in the atmosphere.
【００１４】また第２の発明においては、真空脱ガス後
の溶湯を収容した取鍋の運搬中には、取鍋内に封入した
乾燥空気が溶湯と大気との接触を防止し、溶湯の大気中
の水素ガスの吸収を防止する。In the second aspect of the present invention, during transportation of the ladle containing the molten metal after vacuum degassing, the dry air enclosed in the ladle prevents contact between the molten metal and the atmosphere, and the atmosphere of the molten metal is prevented. Prevents absorption of hydrogen gas inside.
【００１５】また第３の発明においては、真空脱ガス後
の溶湯を収容した取鍋の運搬中には、取鍋内の真空雰囲
気が溶湯と大気との接触を防止し、溶湯の酸化および大
気中の水素ガスの吸収を防止するとともに、運搬中の揺
れ等に伴う溶湯の撹拌により運搬中にも真空脱ガスが進
行する。Further, in the third invention, during transportation of the ladle containing the molten metal after vacuum degassing, the vacuum atmosphere in the ladle prevents contact between the molten metal and the atmosphere, and oxidation of the molten metal and the atmosphere. In addition to preventing the absorption of hydrogen gas inside, vacuum degassing also progresses during transportation due to the agitation of the molten metal that accompanies shaking during transportation.
【００１６】第４の発明の取鍋式真空脱ガス装置によれ
ば、吸排湯接続口と吸湯管および配湯管の接続切離、お
よび排気接続口と真空排気装置との接続切離、および給
気接続口と加圧ガス供給装置との接続切離により、第１
〜第３の発明の真空脱ガス方法を能率的におこなうこと
ができる。According to the ladle-type vacuum degassing device of the fourth aspect of the present invention, the intake / exhaust hot water connection port is disconnected from the hot water intake pipe and the hot water distribution pipe, and the exhaust connection port is disconnected from the vacuum exhaust device. By disconnecting the connection between the air supply connection port and the pressurized gas supply device,
~ The vacuum degassing method of the third invention can be efficiently performed.
【００１７】第５の発明の取鍋式真空脱ガス装置によれ
ば、第４の発明と同様に、吸排湯接続口と吸湯管および
配湯管の接続切離、および排気接続口と真空排気装置と
の接続切離、および給気接続口と加圧ガス供給装置との
接続切離により、第１〜第３の発明の真空脱ガス方法を
能率的におこなうことができるうえ、電熱ヒ−タに通電
することにより、取鍋本体あるいは取鍋本体と該取鍋本
体内の溶湯の加熱をおこなうことができる。According to the ladle-type vacuum degassing apparatus of the fifth invention, as in the fourth invention, the hot water suction / exhaust gas connection port is disconnected from the hot water pipe and the hot water distribution pipe, and the exhaust gas connection port and the vacuum are connected. By connecting / disconnecting the exhaust device and connecting / disconnecting the air supply connection port and the pressurized gas supply device, the vacuum degassing method of the first to third inventions can be efficiently performed, and the electric heating heater can be used. It is possible to heat the ladle body or the ladle body and the molten metal in the ladle body by energizing the ladle.
【００１８】[0018]
【実施例】以下図１乃至図４によりこの発明の一実施例
を説明する。図１および図２において１は、取鍋本体２
に蓋３を密閉開放自在に被せた密閉式の取鍋である。取
鍋本体２は黒鉛製のるつぼ４と鋼製の外殻５の間に耐火
断熱材６を充填して成り、脚部７には、フォ−クリフト
による運搬用のフォ−ク穴７ａが設けてある。蓋３は外
殻１０の内面に断熱材製の内張り１１を施し、そのフラ
ンジ部１２は、取鍋本体２のフランジ部８上に重ねら
れ、ねじ込み式のクランプ装置１３により両フランジ部
８，１２が締付けられ、Ｏリングから成るシ−ル材１４
により密封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 with reference to FIGS. 1 and 2, 1 is a ladle body 2
It is a closed-type ladle that is covered with a lid 3 so as to be freely opened and closed. The ladle body 2 is formed by filling a refractory heat insulating material 6 between a graphite crucible 4 and a steel outer shell 5, and a leg portion 7 is provided with a fork hole 7a for carrying by a forklift. There is. The lid 3 is provided with an inner lining 11 made of a heat insulating material on an inner surface of an outer shell 10, and a flange portion 12 thereof is superposed on a flange portion 8 of the ladle body 2, and both flange portions 8 and 12 are attached by a screw-type clamp device 13. Seal material 14 that is tightened with and consists of an O-ring
It is designed to be sealed by.
【００１９】１６は下端部が取鍋本体２内に開口するス
ト−クで、その上端部は、蓋３を貫通して固着された保
持筒１７内に支持されている。保持筒１７の上部にはフ
ランジ式の吸配湯管接続口（以下単に接続口という）１
８が形成され、図１においては運搬時密封用の円板状の
キャップ１９が、レバ−式のクランプ装置２０によって
接続口１８を密封している。２１はキャップ１９の下面
に固着した石綿パッキンから成るシ−ル材、２２は接続
口１８の上面に装着したＯリングから成るシ−ル材、２
３は接続口１８の上面に突設固着した位置ぎめピンであ
る。Reference numeral 16 denotes a stoker whose lower end portion opens into the ladle body 2, and its upper end portion is supported in a holding cylinder 17 which is fixed through the lid 3. A flange-type suction and distribution pipe connection port (hereinafter simply referred to as connection port) 1 is provided on the upper portion of the holding cylinder 17.
8 is formed, and in FIG. 1, a disk-shaped cap 19 for sealing during transportation seals the connection port 18 by a lever type clamp device 20. Reference numeral 21 denotes a seal material made of asbestos packing fixed to the lower surface of the cap 19, 22 denotes a seal material made of an O-ring mounted on the upper surface of the connection port 18, 2
Reference numeral 3 is a positioning pin protrudingly fixed to the upper surface of the connection port 18.
【００２０】蓋３には、該蓋を貫通して、下端部が取鍋
本体２の上部空間２ａ（詳しくは取鍋本体２内の溶湯４
０の上面と蓋３の内面との間）に開口する排気管３１と
給気管３２が固設してある。排気管３１の上端部には、
排気用のホ−ス６０（図３参照）がワンタッチで着脱さ
れるレバ−操作式のカプラから成る排気接続口３３が設
けられ、また給気管３２の上端部には、給気用のホ−ス
５０（図３参照）がワンタッチで着脱されるカプラから
成る給気接続口３４が設けてある。３５および３６はレ
バ−操作式ボ−ル弁から成る開閉弁である。The lid 3 penetrates through the lid 3 and the lower end portion is the upper space 2a of the ladle body 2 (specifically, the molten metal 4 in the ladle body 2 is
An exhaust pipe 31 and an air supply pipe 32, which are opened between the upper surface of 0 and the inner surface of the lid 3, are fixed. At the upper end of the exhaust pipe 31,
An exhaust hose 60 (see FIG. 3) is provided with an exhaust connection port 33 composed of a lever-operated coupler to which the exhaust hose 60 is attached / detached with one touch, and an air supply hose is provided at the upper end of the air supply pipe 32. An air supply connection port 34, which is a coupler to which the switch 50 (see FIG. 3) is attached / detached with one touch, is provided. Reference numerals 35 and 36 are open / close valves composed of lever-operated ball valves.
【００２１】次に上記構成の取鍋式真空脱ガス装置を用
いて、溶湯４０の真空脱ガスをおこなう方法について説
明する。先ず図３（なお図３および図４において取鍋１
は、クランプ装置の図示を省略するなど、略示図面とし
てある。）に示すように、溶解炉４１の出湯口部４２の
近傍に取鍋１を置く。この実施例における溶解炉４１は
アルミ地金を溶解してアルミの溶湯４０を得るものであ
り、反射炉やるつぼ炉その他の種々の形式の炉が用いら
れる。４３はライニング材で内張りした吸湯管で、その
一端部には、溶解炉４１の溶湯貯留部４４内に開口する
スト−ク４５を接続してある。スト−ク４５を図示のよ
うに炉蓋４６の穴４６ａを通して炉体４７内に挿入し、
吸湯管４３の他端部を取鍋１のスト−ク１６の接続口１
８に接続しクランプ装置２０によりクランプする。４８
は吸湯管４３の他端部に固着された石綿パッキンから成
るシ−ル材である。なおスト−ク４５は炉蓋４６部へ固
設し、これに対して吸湯管４３を着脱するようにしても
よい。Next, a method for performing vacuum degassing of the molten metal 40 using the ladle type vacuum degassing device having the above-described structure will be described. First, referring to FIG. 3 (note that in FIG. 3 and FIG.
Is a schematic drawing, such as omitting the illustration of the clamp device. ), The ladle 1 is placed near the tap hole 42 of the melting furnace 41. The melting furnace 41 in this embodiment is for melting the aluminum base metal to obtain the molten aluminum 40, and a reverberatory furnace, a crucible furnace or other various types of furnaces are used. Reference numeral 43 denotes a hot water absorption pipe lined with a lining material, and one end of the hot water absorption pipe is connected to a stock 45 that opens into a molten metal storage portion 44 of the melting furnace 41. Insert the stork 45 into the furnace body 47 through the hole 46a of the furnace lid 46 as shown,
The other end of the hot water pipe 43 is the connection port 1 of the stork 16 of the ladle 1.
8 and clamp with a clamp device 20. 48
Is a seal material composed of asbestos packing fixed to the other end of the hot water pipe 43. The stock 45 may be fixed to the furnace lid 46, and the hot water suction pipe 43 may be attached to and detached from the stove 45.
【００２２】また取鍋１の給気接続口３４には、給気用
のホ−ス５０を介して窒素ガス供給装置５１を接続す
る。この窒素ガス供給装置５１は、窒素ガスボンベ５２
に減圧弁５３と電磁開閉弁５４を接続して成る。さらに
取鍋１の排気接続口３３には、排気用のホ−ス６０を介
して真空排気装置６１を接続する。この真空排気装置６
１は、真空タンク６２に真空ポンプ６３を接続して成
り、６４は電磁開閉弁である。A nitrogen gas supply device 51 is connected to the air supply connection port 34 of the ladle 1 via an air supply hose 50. This nitrogen gas supply device 51 includes a nitrogen gas cylinder 52
The pressure reducing valve 53 and the electromagnetic on-off valve 54 are connected to the. Further, a vacuum exhaust device 61 is connected to the exhaust connection port 33 of the ladle 1 via an exhaust hose 60. This vacuum exhaust device 6
Reference numeral 1 denotes a vacuum tank 62 connected to a vacuum pump 63, and 64 denotes an electromagnetic opening / closing valve.
【００２３】上記の接続状態において、先ず開閉弁３５
を開、開閉弁３６を閉として、真空排気装置６１により
取鍋１内をたとえば１０〜１×１０-2Torr程度の真空に
排気すれば、溶解炉４１内の溶湯４０は取鍋１内に吸引
される。取鍋１内に溶湯４０が所定量吸引されたら、吸
湯管４３を接続口１８から切離し、図１に示すキャップ
１９により接続口１８を閉鎖し、次いで真空排気装置６
１により取鍋１内をたとえば１０〜１×１０-2Torr程度
の真空に所定時間（たとえば１０〜２０分間）保持し
て、真空脱ガスをおこなう。In the above-mentioned connected state, first the on-off valve 35
Is opened and the on-off valve 36 is closed, and if the inside of the ladle 1 is evacuated to a vacuum of, for example, about 10 to 1 × 10 −2 Torr by the vacuum evacuation device 61, the molten metal 40 in the melting furnace 41 enters the ladle 1. Sucked. When the molten metal 40 is sucked into the ladle 1 by a predetermined amount, the hot water pipe 43 is separated from the connection port 18, the connection port 18 is closed by the cap 19 shown in FIG.
1, the inside of the ladle 1 is held in a vacuum of, for example, about 10 to 1 × 10 -2 Torr for a predetermined time (for example, 10 to 20 minutes) to perform vacuum degassing.
【００２４】その後、開閉弁３５を閉じ、ホ−ス６０を
排気接続口３３から切離したのち、給気接続口３４部の
開閉弁３６を開いて窒素ガス供給装置５１から窒素ガス
を供給して、大気の侵入を阻止するために取鍋１内をた
とえば５０〜２００mmＡｑ程度の圧力に加圧し、開閉弁
３６を閉じホ−ス５０を給気接続口３４から切離す。こ
の状態（図１に示す状態）で、取鍋１をフォ−クリフト
等により運搬し、図４に示すように溶湯使用装置である
鋳造装置の保持炉７１の近傍へ、取鍋１を置く。After that, the on-off valve 35 is closed, the hose 60 is separated from the exhaust connection port 33, and then the on-off valve 36 at the air supply connection port 34 is opened to supply the nitrogen gas from the nitrogen gas supply device 51. In order to prevent the invasion of the atmosphere, the inside of the ladle 1 is pressurized to a pressure of, for example, about 50 to 200 mmAq, the on-off valve 36 is closed, and the hose 50 is disconnected from the air supply connection port 34. In this state (state shown in FIG. 1), the ladle 1 is transported by a forklift or the like, and as shown in FIG. 4, the ladle 1 is placed near the holding furnace 71 of the casting apparatus which is a molten metal using apparatus.
【００２５】図４において保持炉７１は、ヒ−タ７２を
そなえた炉体７３内にるつぼ７４を設置して成る。また
８１は窒素ガス供給装置で、図３における同装置と同構
成を有するものであり、図３と同一部分には同一符号を
付してある。９１はるつぼ７４内に開口するスト−ク９
２を先端部にそなえたライニング材で内張りした配湯管
で、この配湯管９１を接続口１８に接続するとともに、
給気接続口３４にホ−ス５０を介して窒素ガス供給装置
８１を接続する。なお９３は配湯管９１の端部に固着し
た石綿パッキンから成るシ−ル材である。In FIG. 4, the holding furnace 71 comprises a furnace body 73 having a heater 72 and a crucible 74 installed therein. Further, reference numeral 81 is a nitrogen gas supply device, which has the same configuration as the same device in FIG. 3, and the same parts as those in FIG. 3 are denoted by the same reference numerals. 91 Stalk 9 opening into crucible 74
With a hot water distribution pipe lined with a lining material having 2 at the tip, this hot water distribution pipe 91 is connected to the connection port 18,
The nitrogen gas supply device 81 is connected to the air supply connection port 34 via the hose 50. Reference numeral 93 is a seal material made of asbestos packing fixed to the end of the hot water pipe 91.
【００２６】そして開閉弁３６を開き、窒素ガスを取鍋
１内に送入して該取鍋１内をたとえば０．１〜０．５Kg
f ／cm2 程度に加圧し、該取鍋１内の溶湯４０を配湯管
９１を経て保持炉７１のるつぼ７４内に配湯する。所定
量の配湯後、図示しない他の保持炉に対して同様にして
配湯をおこない、取鍋１内の溶湯４０が不足状態となっ
たら、前記の工程により溶解炉４１内から新たな溶湯４
０を取鍋１内に吸湯し、以下同様の工程を繰返せばよ
い。Then, the on-off valve 36 is opened, nitrogen gas is fed into the ladle 1, and the inside of the ladle 1 is, for example, 0.1 to 0.5 kg.
The molten metal 40 in the ladle 1 is distributed to the crucible 74 of the holding furnace 71 through the distribution pipe 91 while applying a pressure of about f / cm 2 . After a predetermined amount of hot water has been distributed, hot water is distributed to other holding furnaces (not shown) in the same manner, and when the molten metal 40 in the ladle 1 becomes insufficient, a new molten metal is melted from the melting furnace 41 by the above process. Four
0 may be absorbed in the ladle 1 and the same steps may be repeated thereafter.
【００２７】上記のように、溶解炉４１から取鍋１への
給湯は、溶湯貯留部４４の溶湯４０中に先端部が浸積し
た吸湯管４３による吸引によりおこなわれるとともに、
保持炉７１への配湯も、取鍋１内の溶湯４０を該溶湯中
に浸積したスト−ク１６および配湯管９１を経て加圧供
給することによりおこなわれるので、溶湯への大気の巻
込みおよび溶湯の大気との接触が防止され、また真空脱
ガス後の取鍋１内に窒素ガスが封入された状態で溶湯の
運搬をおこなうので、運搬中における溶湯の大気との接
触および大気の巻込みが防止される。これによって溶湯
は酸化や水分を吸収することなく品質良好な状態で、溶
湯使用装置である保持炉７１内に供給できるのである。As described above, the hot water is supplied from the melting furnace 41 to the ladle 1 by suction by the hot water suction pipe 43 having the tip end immersed in the molten metal 40 of the molten metal storage section 44.
Hot water is also distributed to the holding furnace 71 by pressurizing and supplying the molten metal 40 in the ladle 1 through the stock 16 and the distribution pipe 91, which are immersed in the molten metal. Since the molten metal is carried in a state where entrainment and contact of the molten metal with the atmosphere are prevented, and nitrogen gas is enclosed in the ladle 1 after vacuum degassing, contact of the molten metal with the atmosphere and the atmosphere during transportation are carried out. Is prevented from being caught. As a result, the molten metal can be supplied into the holding furnace 71 which is a molten metal using device in a good quality state without absorbing oxidation or moisture.
【００２８】次に図５は第５の発明の取鍋式真空脱ガス
装置の一実施例を示し、取鍋本体２の壁部２ｂ内に電熱
ヒ−タ２５を埋設した点のみが、前記図１および図２に
示す取鍋式真空脱ガス装置と異なり、その他の構成は図
１および図２に示す装置と同じであるので、図１および
図２と同一部分に同一符号を付して図示し、その詳細な
説明は省略する。なお図５において、電熱ヒ−タ２５は
るつぼ４の胴部を包囲する環状を呈し、るつぼ４の胴部
に巻付けたセラミックウ−ル製の保温材層２６の上に嵌
着され、砂から成る耐火断熱材６の充填層内に埋設され
ている。２７は電熱ヒ−タ２５に至る給電線２８が接続
されたコンセントで、電熱ヒ−タ通電時に図示しないコ
−ドにより電源に接続される。Next, FIG. 5 shows an embodiment of the ladle type vacuum degassing apparatus of the fifth invention. The only difference is that the electric heating heater 25 is embedded in the wall portion 2b of the ladle body 2. Unlike the ladle-type vacuum degassing apparatus shown in FIGS. 1 and 2, the other configurations are the same as those of the apparatus shown in FIGS. 1 and 2, and therefore the same parts as those in FIGS. It is shown and its detailed description is omitted. In FIG. 5, an electric heating heater 25 has an annular shape surrounding the body of the crucible 4 and is fitted on the heat insulating material layer 26 made of ceramic wool wound around the body of the crucible 4 to form a sand. Is embedded in the packed layer of the fireproof heat insulating material 6. Reference numeral 27 is an outlet to which a power supply line 28 leading to the electric heating heater 25 is connected, and is connected to a power source by a code (not shown) when the electric heating heater is energized.
【００２９】図５に示す取鍋式真空脱ガス装置を用いれ
ば、前記実施例と同様にして溶湯４０の真空脱ガスをお
こなうことができるうえ、たとえば真空脱ガス操業開始
時に取鍋１が冷えた状態にある場合や、操業開始後に鋳
造工程などの後工程の関係で取鍋１を溶解炉４１の近傍
で長い待ち時間の間待機させる必要のある場合などは、
電熱ヒ−タ２５に通電して取鍋本体２を予熱し、溶湯４
０を温度低下させることなく吸引受湯して支障なく真空
脱ガスでき、さらに鋳造装置の故障などにより溶湯収容
状態で取鍋１を保持する必要がある場合なども、電熱ヒ
−タ２５に通電することにより取鍋本体２内の溶湯４０
の温度低下を防止して支障なく配湯することができる。By using the ladle type vacuum degassing apparatus shown in FIG. 5, the molten metal 40 can be vacuum degassed in the same manner as in the above-mentioned embodiment, and, for example, the ladle 1 is cooled at the start of the vacuum degassing operation. In the case where the ladle 1 is in a closed state or when it is necessary to wait the ladle 1 in the vicinity of the melting furnace 41 for a long waiting time due to a post process such as a casting process after the start of operation,
The electric heating heater 25 is energized to preheat the ladle body 2 and the molten metal 4
Even if it is necessary to hold the ladle 1 in the molten metal accommodation state due to a trouble such as a casting device failure, it is possible to carry out suction degassing without reducing the temperature of 0 and vacuum degassing can be performed without any problem. By doing this, the molten metal 40 in the ladle body 2
The temperature can be prevented from lowering and hot water can be distributed without any trouble.
【００３０】この発明は上記各実施例に限定されるもの
ではなく、たとえば上記実施例では排気接続口３３およ
び給気接続口３４部に、ワンタッチ式のカプラを用いた
ので、ホ−スの着脱が迅速容易におこなえるという長所
を有するものであるが、他の接続口構造とすることもで
きる。また排気管３１と給気管３２は、取鍋本体２部に
設けてもよく、さらに給気管３２は取鍋本体２の溶湯浸
積部にポ−ラスプラグ構造のものとして設けてもよい。
また取鍋１は、フォ−ク穴７ａのかわりに吊金具を取鍋
本体２部に設け、クレ−ン等で吊上げて運搬するように
してもよい。The present invention is not limited to the above embodiments. For example, in the above embodiments, since the one-touch type couplers are used for the exhaust connection port 33 and the air supply connection port 34, the hose is attached and detached. However, other connection port structures can be used. Further, the exhaust pipe 31 and the air supply pipe 32 may be provided in the ladle body 2 portion, and the air supply pipe 32 may be provided in the molten metal immersion portion of the ladle body 2 as a porous plug structure.
In addition, the ladle 1 may be provided with a hanging metal fitting in place of the fork hole 7a in the ladle body 2 and may be lifted by a crane or the like for transportation.
【００３１】また第２の発明を実施する場合には、窒素
ガス供給装置５１のかわりに乾燥空気供給装置を用いれ
ばよく、第３の発明を実施する場合には、真空脱ガス
後、給気管３２よりのガスの封入をおこなわず、真空排
気装置６１による取鍋内減圧状態のまま開閉弁３５を閉
じて、取鍋１の運搬をおこなえばよい。When the second invention is carried out, a dry air supply device may be used instead of the nitrogen gas supply device 51, and when the third invention is carried out, after the vacuum degassing, the air supply pipe is used. The gas from 32 is not filled, and the ladle 1 may be transported by closing the opening / closing valve 35 in the decompressed state of the ladle by the vacuum exhaust device 61.
【００３２】この発明は、溶湯使用装置が鋳型であっ
て、真空脱ガス後の溶湯を直接該鋳型に配湯管を経て注
湯する場合にも適用できる。さらにこの発明は、アルミ
以外の非鉄金属や鉄系金属から成る溶湯の真空脱ガスに
も適用できるものである。The present invention can also be applied to a case where the apparatus for using the molten metal is a mold and the molten metal after vacuum degassing is poured directly into the mold through a hot pipe. Further, the present invention can also be applied to vacuum degassing of a molten metal made of a non-ferrous metal other than aluminum or a ferrous metal.
【００３３】[0033]
【発明の効果】以上説明したようにこの発明によれば、
吸湯管による取鍋内への減圧吸湯と配湯管による溶湯使
用装置への加圧配湯により、溶湯の大気との接触や大気
の巻込みを減らして溶湯の品質向上をはかることがで
き、また取鍋内を直接減圧して真空脱ガスをおこなうの
で、能率的に真空脱ガスできるととともに、真空排気装
置も小容量のもので済む。As described above, according to the present invention,
It is possible to improve the quality of the molten metal by reducing the amount of contact of the molten metal with the atmosphere and the entrainment of the atmosphere by reducing the pressure of the molten metal into the ladle using the hot water pipe and distributing the pressure to the device that uses the molten metal using the hot water pipe. In addition, since vacuum degassing is performed by directly depressurizing the inside of the ladle, it is possible to efficiently perform vacuum degassing, and a vacuum exhaust device with a small capacity is sufficient.
【００３４】また第５の発明の真空脱ガス装置によれ
ば、電熱ヒ−タの通電により、取鍋本体あるいは取鍋本
体と該取鍋本体内の溶湯の加熱をおこなうことができ、
操業開始時に取鍋が冷えている場合や、取鍋内への溶湯
吸引前あるいは吸引後に待ち時間がある場合でも、溶湯
温度を低下させずに支障なく真空脱ガスおよび吸配湯を
おこなうことができる。According to the vacuum degassing apparatus of the fifth invention, the ladle body or the ladle body and the molten metal in the ladle body can be heated by energizing the electric heating heater.
Even if the ladle is cold at the start of operation, or if there is a waiting time before or after the molten metal has been sucked into the ladle, vacuum degassing and suction / delivery can be performed without lowering the molten metal temperature without any problem. it can.
【図１】この発明の一実施例を示す取鍋式真空脱ガス装
置の縦断面図である。FIG. 1 is a vertical sectional view of a ladle type vacuum degassing apparatus showing an embodiment of the present invention.
【図２】図１の装置の平面図である。2 is a plan view of the device of FIG. 1. FIG.
【図３】図１の装置による吸湯および真空脱ガス工程を
示す縦断面図である。FIG. 3 is a vertical cross-sectional view showing a hot water absorption and vacuum degassing process by the apparatus of FIG.
【図４】図１の装置による配湯工程を示す縦断面図であ
る。FIG. 4 is a vertical sectional view showing a hot water distribution process by the apparatus of FIG.
【図５】この発明の他の実施例を示す取鍋式真空脱ガス
装置の縦断面図である。FIG. 5 is a longitudinal sectional view of a ladle type vacuum degassing apparatus showing another embodiment of the present invention.
１…取鍋、２…取鍋本体、２ａ…上部空間、２ｂ…壁
部、３…蓋、１３…クランプ装置、１６…スト−ク、１
８…吸配湯管接続口、２０…クランプ装置、２５…電熱
ヒ−タ、３１…排気管、３２…給気管、３３…排気接続
口、３４…給気接続口、４０…溶湯、４１…溶解炉、４
３…吸湯管、４４…溶湯貯留部、４５…スト−ク、５０
…ホ−ス、５１…窒素ガス供給装置、６０…ホ−ス、６
１…真空排気装置、７１…保持炉、７４…るつぼ、８１
…窒素ガス供給装置、９１…配湯管、９２…スト−ク。DESCRIPTION OF SYMBOLS 1 ... Ladle, 2 ... Ladle body, 2a ... Upper space, 2b ... Wall part, 3 ... Lid, 13 ... Clamping device, 16 ... Stock, 1
8 ... suction / distribution pipe connection port, 20 ... clamp device, 25 ... electric heat heater, 31 ... exhaust pipe, 32 ... air supply pipe, 33 ... exhaust connection port, 34 ... air supply connection port, 40 ... molten metal, 41 ... Melting furnace, 4
3 ... Hot water pipe, 44 ... Molten metal reservoir, 45 ... Stalk, 50
... hose, 51 ... nitrogen gas supply device, 60 ... hose, 6
DESCRIPTION OF SYMBOLS 1 ... Evacuation device, 71 ... Holding furnace, 74 ... Crucible, 81
... Nitrogen gas supply device, 91 ... Hot water pipe, 92 ... stock.
Claims (5)
をそなえた密閉式の取鍋の前記スト−クと溶解炉とを吸
湯管により接続し、前記取鍋内を減圧して前記溶解炉内
の溶湯を前記取鍋内に吸引し、前記溶湯を所定量吸引後
密閉した前記取鍋内を減圧して該溶湯の真空脱ガスをお
こなったのち、前記取鍋内に酸化防止用ガスを封入した
状態で前記取鍋の運搬をおこない、溶湯使用装置と前記
スト−クとを配湯管により接続し、前記取鍋内に加圧ガ
スを送入して前記溶湯を前記溶湯使用装置に加圧配湯す
ることを特徴とする真空脱ガス方法。1. A closed type ladle having a stoke that penetrates a lid placed on a ladle body is connected to a melting furnace by a hot water pipe to reduce the pressure in the ladle. The molten metal in the melting furnace is sucked into the ladle, a predetermined amount of the molten metal is sucked, and the sealed ladle is decompressed to perform vacuum degassing of the molten metal, and then oxidized in the ladle. Carrying the ladle with the prevention gas sealed, connecting the molten metal using device and the stork with a hot water distribution pipe, and sending pressurized gas into the ladle to melt the molten metal. A vacuum degassing method characterized in that hot water is distributed under pressure to an apparatus using the melt.
をそなえた密閉式の取鍋の前記スト−クと溶解炉とを吸
湯管により接続し、前記取鍋内を減圧して前記溶解炉内
の溶湯を前記取鍋内に吸引し、前記溶湯を所定量吸引後
密閉した前記取鍋内を減圧して該溶湯の真空脱ガスをお
こなったのち、前記取鍋内に乾燥空気を封入した状態で
前記取鍋の運搬をおこない、溶湯使用装置と前記スト−
クとを配湯管により接続し、前記取鍋内に加圧ガスを送
入して前記溶湯を前記溶湯使用装置に加圧配湯すること
を特徴とする真空脱ガス方法。2. A molten ladle is connected to the stow of a closed-type ladle having a stoke that penetrates a lid placed on the main body of the ladle, and the inside of the ladle is depressurized. The molten metal in the melting furnace is sucked into the ladle, a predetermined amount of the molten metal is sucked, the sealed ladle is decompressed to vacuum degas the molten metal, and then the molten metal is dried in the ladle. The ladle is transported in a state where air is enclosed, and the molten metal using device and the storage device are used.
A vacuum degassing method, characterized in that the molten metal is connected to the molten metal by a hot water distribution pipe, and pressurized gas is fed into the ladle to pressurize the molten metal to the molten metal using device.
をそなえた密閉式の取鍋の前記スト−クと溶解炉とを吸
湯管により接続し、前記取鍋内を減圧して前記溶解炉内
の溶湯を前記取鍋内に吸引し、前記溶湯を所定量吸引後
密閉した前記取鍋内を減圧して該溶湯の真空脱ガスをお
こなったのち、前記取鍋内を真空に維持した状態で前記
取鍋の運搬をおこない、溶湯使用装置と前記スト−クと
を配湯管により接続し、前記取鍋内に加圧ガスを送入し
て前記溶湯を前記溶湯使用装置に加圧配湯することを特
徴とする真空脱ガス方法。3. A molten ladle is connected to the stow of a closed-type ladle having a stoke that penetrates a lid placed on the main body of the ladle, and the inside of the ladle is depressurized. The molten metal in the melting furnace is sucked into the ladle, a predetermined amount of the molten metal is sucked, and the sealed ladle is decompressed to vacuum degas the molten metal, and then the ladle is vacuumed. The ladle is transported in a state of being maintained at, the molten metal using device and the stork are connected by a hot water distribution pipe, and pressurized gas is fed into the ladle to use the molten metal as the molten metal using device. Vacuum degassing method, characterized in that hot water is distributed under pressure.
端部が前記取鍋本体内に開口し上端部に吸湯管と配湯管
が択一的に接続される吸配湯接続口をそなえたスト−ク
を、前記蓋に取付けるとともに、一端部が前記取鍋本体
の上部空間内に開口し他端部に真空排気装置に接続され
る排気接続口をそなえた排気管と、一端部が前記取鍋本
体の上部空間内に開口し他端部に加圧ガス供給装置に接
続される給気接続口をそなえた給気管とを、前記蓋また
は前記取鍋本体に取付けたことを特徴とする取鍋式真空
脱ガス装置。4. A hot and cold water distribution connection in which a ladle body is covered with a lid so as to be hermetically and freely openable, a lower end portion is opened in the ladle body, and a hot water pipe and a hot water pipe pipe are selectively connected to the upper end portion. An exhaust pipe having an exhaust connection port, which is attached to the lid with a mouth provided with a mouth, has one end opening in the upper space of the ladle body and the other end connected to a vacuum exhaust device, An air supply pipe having one end opening into the upper space of the ladle body and the other end having an air supply connection port connected to a pressurized gas supply device is attached to the lid or the ladle body. Ladle type vacuum degassing device.
蓋を密閉開放自在に被せ、下端部が前記取鍋本体内に開
口し上端部に吸湯管と配湯管が択一的に接続される吸配
湯接続口をそなえたスト−クを、前記蓋に取付けるとと
もに、一端部が前記取鍋本体の上部空間内に開口し他端
部に真空排気装置に接続される排気接続口をそなえた排
気管と、一端部が前記取鍋本体の上部空間内に開口し他
端部に加圧ガス供給装置に接続される給気接続口をそな
えた給気管とを、前記蓋または前記取鍋本体に取付けた
ことを特徴とする取鍋式真空脱ガス装置。5. A ladle body having an electric heating heater embedded in a wall is covered with a lid so that the lid can be freely opened and closed, a lower end portion is opened in the ladle body, and a hot water suction pipe and a hot water distribution pipe are selected at the upper end portion. A stow having a hot and cold water distribution connection port, which is integrally connected, is attached to the lid, and one end is opened in the upper space of the ladle body and the other end is connected to a vacuum exhaust device. An exhaust pipe having an exhaust connection port, and an air supply pipe having one end opening in the upper space of the ladle body and the other end having an air supply connection port connected to a pressurized gas supply device, A ladle type vacuum degassing device, which is attached to a lid or the ladle body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25299794A JP2711515B2 (en) | 1994-05-02 | 1994-09-20 | Vacuum degassing method and ladle type vacuum degasser |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11586294 | 1994-05-02 | ||
| JP6-115862 | 1994-05-02 | ||
| JP25299794A JP2711515B2 (en) | 1994-05-02 | 1994-09-20 | Vacuum degassing method and ladle type vacuum degasser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0820826A true JPH0820826A (en) | 1996-01-23 |
| JP2711515B2 JP2711515B2 (en) | 1998-02-10 |
Family
ID=26454287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25299794A Expired - Fee Related JP2711515B2 (en) | 1994-05-02 | 1994-09-20 | Vacuum degassing method and ladle type vacuum degasser |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2711515B2 (en) |
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| WO2003068433A1 (en) * | 2002-02-14 | 2003-08-21 | Hoei Shokai Co., Ltd. | Container for supplying molten metal and safety device |
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1994
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2711515B2 (en) | 1998-02-10 |
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