JP2000309829A - Device for dispersing bubble into molten metal - Google Patents
Device for dispersing bubble into molten metalInfo
- Publication number
- JP2000309829A JP2000309829A JP11116140A JP11614099A JP2000309829A JP 2000309829 A JP2000309829 A JP 2000309829A JP 11116140 A JP11116140 A JP 11116140A JP 11614099 A JP11614099 A JP 11614099A JP 2000309829 A JP2000309829 A JP 2000309829A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- impeller
- gas
- hole
- cover
- 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)
- Treatment Of Steel In Its Molten State (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、溶融状態にある金属溶
湯に微細気泡として精製ガスを吹き込み、不純物を浮上
分離する気泡分散装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bubble dispersing apparatus for blowing purified gas as fine bubbles into a molten metal in a molten state to float and separate impurities.
【０００２】[0002]
【従来の技術】アルミニウム又はアルミニウム合金の溶
湯には、アルカリ金属，アルミニウムカーバイド，水素
ガス，炉材の微粉等の不純物が含まれている。比重の軽
い不純物は、溶湯中に塩素，窒素，Ａｒガス等の精製ガ
スを微細気泡として吹き込むことにより浮上分離する。
精製ガス吹込みに際し、溶湯中に渦流を発生させながら
精製ガスを吹き込むと、吹き込まれた精製ガスは微細気
泡となって溶湯中に効率よく分散し、処理効率を向上さ
せる。2. Description of the Related Art Molten aluminum or aluminum alloy contains impurities such as alkali metals, aluminum carbide, hydrogen gas, and fine powder of furnace materials. Impurities having a low specific gravity are floated and separated by blowing purified gas such as chlorine, nitrogen, and Ar gas as fine bubbles into the molten metal.
When the purified gas is blown while generating a vortex in the molten metal during the blowing of the purified gas, the injected purified gas becomes fine bubbles and is efficiently dispersed in the molten metal, thereby improving the processing efficiency.
【０００３】たとえば、特公平７−３９６１３号公報で
は、図１に示すように、精製ガス用の貫通孔を開け、先
端にインペラー１を固着した回転軸２を備えた気泡分散
装置が紹介されている。回転軸２と一体的に回転するイ
ンペラー１によって溶湯３中に渦流が発生する。インペ
ラー１の上方には被覆体４が設けられており、インペラ
ー１／被覆体４の間に侵入した溶湯は、インペラー１の
回転によって押し出され、溶湯循環流５となって溶湯容
器６内を循環する。精製ガスは、インペラー１の底面に
設けられている開口部７から溶湯中に吹き出され、微細
気泡８として溶湯循環流５に乗って溶湯全体に万遍なく
分散される。For example, Japanese Patent Publication No. 7-39613 discloses a bubble dispersing apparatus having a rotary shaft 2 having a through-hole for a purified gas and an impeller 1 fixed to the tip as shown in FIG. I have. A vortex is generated in the molten metal 3 by the impeller 1 that rotates integrally with the rotating shaft 2. A coating 4 is provided above the impeller 1, and the molten metal that has entered between the impeller 1 and the coating 4 is extruded by the rotation of the impeller 1 and circulates in the molten metal container 6 as a molten metal circulation flow 5. I do. The purified gas is blown into the molten metal from an opening 7 provided on the bottom surface of the impeller 1, and is dispersed as fine bubbles 8 on the molten metal circulation flow 5 throughout the molten metal.
【０００４】[0004]
【発明が解決しようとする課題】インペラー１は、溶湯
循環流５に推力を与えるように螺旋状の羽根をもってい
る。溶湯容器６内に安定した溶湯循環流５を発生させる
ためには、インペラー１／被覆体４との間から押し出さ
れる溶湯量に相応する量の溶湯がインペラー１／被覆体
４の間に流入することが必要である。しかし、図１に示
すようにインペラー１／被覆体４の間隙が狭いと、十分
な量の溶湯がインペラー１／被覆体４間に侵入できな
い。そのため、溶湯循環流５が不安定化し、吹き込まれ
た精製ガスの微細気泡８が溶湯容器６内に偏在しやす
く、結果として精製効率を低下させる。The impeller 1 has spiral blades so as to apply a thrust to the molten metal circulation flow 5. In order to generate a stable molten metal circulation flow 5 in the molten metal container 6, an amount of molten metal corresponding to the amount of molten metal extruded from between the impeller 1 and the coating 4 flows between the impeller 1 and the coating 4. It is necessary. However, if the gap between the impeller 1 and the coating 4 is narrow as shown in FIG. 1, a sufficient amount of molten metal cannot enter between the impeller 1 and the coating 4. Therefore, the molten metal circulation flow 5 is destabilized, and the fine gas bubbles 8 of the injected purified gas tend to be unevenly distributed in the molten metal container 6, thereby lowering the purification efficiency.
【０００５】[0005]
【課題を解決するための手段】本発明は、このような問
題を解消すべく案出されたものであり、インペラーに対
する被覆体の位置関係を改良することにより、インペラ
ー／被覆体間に侵入する溶湯量を十分に確保して溶湯循
環流を安定化させ、溶湯に対する微細気泡の分散性を向
上させ、アルミニウム又はアルミニウム合金溶湯を効率
よく精製することを目的とする。本発明の気泡分散装置
は、その目的を達成するため、精製ガスを供給する貫通
孔が軸方向に延びる回転軸と、回転軸の下端に螺合さ
れ、半径方向外向きに広がったカバー部をもつ被覆体
と、回転軸の下端に螺合され、回転軸の貫通孔に一致す
るガス噴出孔が軸方向に貫通して形成され、傾斜した複
数の羽根部が円周方向に等間隔で周面に形成されたイン
ペラーとを備え、インペラーの上面と同じ高さ又はイン
ペラーの上面よりも高い位置にカバー部の底面が設定さ
れていることを特徴とする。SUMMARY OF THE INVENTION The present invention has been devised to solve such a problem. By improving the positional relationship of the covering with respect to the impeller, it is possible to penetrate between the impeller and the covering. An object of the present invention is to secure a sufficient amount of molten metal, stabilize a circulating flow of molten metal, improve dispersibility of fine bubbles in the molten metal, and efficiently purify molten aluminum or aluminum alloy. In order to achieve the object, the bubble dispersing device of the present invention includes a rotating shaft having a through-hole for supplying purified gas extending in an axial direction, and a cover portion which is screwed to a lower end of the rotating shaft and spreads radially outward. And a gas ejection hole that is screwed to the lower end of the rotating shaft, and is formed in the axial direction through a gas ejection hole that matches the through hole of the rotating shaft. And an impeller formed on the surface, wherein the bottom surface of the cover portion is set at the same height as the upper surface of the impeller or at a position higher than the upper surface of the impeller.
【０００６】[0006]
【実施の形態】本発明に従った気泡分散装置は、図２の
分解斜視図に示すように、軸方向に延びる貫通孔１１が
形成された回転軸１０の先端に、被覆体２０及びインペ
ラー３０を装着している。回転軸１０，被覆体２０及び
インペラー３０は、アルミニウム又はアルミニウム合金
溶湯による侵食に耐え、耐熱性に優れたグラファイト，
セラミックス等で作られている。回転軸１０は、軸方向
に延びる貫通孔１１が全長にわたって穿設されている。
回転軸１０の下端部には、被覆体２０を挟み込み、イン
ペラー３０の雌ネジ部３１に螺合する雄ネジ部１３がイ
ンペラー３０の回転方向と逆ネジに刻設されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in an exploded perspective view of FIG. 2, a bubble dispersing device according to the present invention has a coating body 20 and an impeller 30 at a tip end of a rotating shaft 10 having a through hole 11 extending in an axial direction. Is installed. The rotating shaft 10, the covering 20, and the impeller 30 are made of graphite, which is resistant to erosion by aluminum or aluminum alloy melt and has excellent heat resistance.
It is made of ceramics. The rotating shaft 10 is provided with a through hole 11 extending in the axial direction over the entire length.
At the lower end of the rotating shaft 10, a male screw portion 13 that sandwiches the covering body 20 and is screwed into the female screw portion 31 of the impeller 30 is formed in a reverse direction to the rotation direction of the impeller 30.
【０００７】被覆体２０は、上方から回転軸１０が嵌め
込まれる凹部が内周面に形成された装着用筒部２２を備
えている。装着用筒部２２の内部には、図３に示すよう
に回転軸１０の下端面が当接する段差部２３が形成され
ている。段差部２３の下方には、小径部２４を介して、
下広がりのテーパ状孔部２５が形成されている。装着用
筒部２２の外側では、カバー部２６が半径方向外向きに
広がっている。カバー部２６は、図４に示すようにイン
ペラー３０よりも若干大きな外径をもっている。図３
（ａ）の例では、カバー部２６の周縁が若干下向きに偏
向した垂直部２７になっている。垂直部２７の長さは、
下端面２８がインペラー３０の上面と同じ高さ又はイン
ペラー３０の上面よりも高く位置する範囲で適宜設定さ
れる。カバー部２６は、図３（ｂ）に示すように装着用
筒部２２から水平方向に延びたフラット形状であっても
良い。[0007] The cover 20 has a mounting tube portion 22 having a concave portion on the inner peripheral surface into which the rotating shaft 10 is fitted from above. As shown in FIG. 3, a step portion 23 with which the lower end surface of the rotating shaft 10 abuts is formed inside the mounting tube portion 22. Below the step 23, via a small diameter portion 24,
A tapered hole 25 extending downward is formed. Outside the mounting tube portion 22, the cover portion 26 extends radially outward. The cover 26 has an outer diameter slightly larger than that of the impeller 30, as shown in FIG. FIG.
In the example of (a), the periphery of the cover portion 26 is a vertical portion 27 slightly deflected downward. The length of the vertical part 27 is
The lower end surface 28 is appropriately set within a range where the lower end surface 28 is located at the same height as the upper surface of the impeller 30 or higher than the upper surface of the impeller 30. The cover 26 may have a flat shape extending horizontally from the mounting tube 22 as shown in FIG. 3B.
【０００８】インペラー３０は、回転軸１０の雄ネジ部
１３がねじ込まれる雌ネジ部３１を内周面に刻設した筒
状部３２を備えている。筒状部３２の外周角部は、被覆
体２０に形成したテーパ状孔部２５の傾斜面に対応する
角度を付けた面取り部３３になっている。筒状部３２の
中心には、回転軸１０の貫通孔１１に一致するガス噴出
孔３４が形成されている。ガス噴出孔３４は、図４に示
すようにインペラー３０を貫通し、インペラー３０の底
面に開口している。インペラー３０の外周面には、複数
の羽根部３５が円周方向に等間隔で放射状に形成されて
いる。個々の羽根部３５は、インペラー３０の上面又は
底面に対して角度α（図２）で傾斜している。羽根部３
５の傾斜角αは、溶湯に与える推力を大きくする上では
狭い傾斜角ほど好ましいが、狭すぎる角度ではインペラ
ー３０の回転に大きな駆動力を必要とするばかりでな
く、乱流が発生しやすくなる。実際の操業条件を前提に
すると、３０〜６０度の範囲で傾斜角αを設定すること
が好ましい。The impeller 30 has a cylindrical portion 32 in which a female screw portion 31 into which the male screw portion 13 of the rotating shaft 10 is screwed is formed on the inner peripheral surface. The outer peripheral corner of the cylindrical portion 32 is a chamfer 33 at an angle corresponding to the inclined surface of the tapered hole 25 formed in the cover 20. At the center of the cylindrical portion 32, a gas ejection hole 34 corresponding to the through hole 11 of the rotating shaft 10 is formed. The gas ejection hole 34 penetrates through the impeller 30 as shown in FIG. 4 and opens at the bottom surface of the impeller 30. On the outer peripheral surface of the impeller 30, a plurality of blade portions 35 are formed radially at equal intervals in the circumferential direction. Each blade 35 is inclined at an angle α (FIG. 2) with respect to the top or bottom surface of the impeller 30. Wings 3
The inclination angle α of 5 is preferably as narrow as possible in order to increase the thrust given to the molten metal. However, if the inclination angle is too small, not only a large driving force is required to rotate the impeller 30 but also turbulence is likely to occur. . Assuming actual operating conditions, it is preferable to set the inclination angle α in the range of 30 to 60 degrees.
【０００９】回転軸１０にインペラー３０を固着するに
際し、先ず被覆体２０を挟み込み、インペラー３０の雌
ネジ部３１に螺合する。雄ネジ部１３のねじ込みに伴っ
て被覆体２０のテーパ状孔部２５のテーパ面が筒状部３
２の面取り部３３に押し付けられるので、インペラー３
０は隙間なく被覆体２０に密着する。また、雄ネジ部１
３は、インペラー３０の回転方向と逆ネジに刻設されて
いるため、運転中にネジが緩むことなく強固に被覆体２
０を圧着できる。組み立てられた気泡分散装置は、図４
に示すようにインペラー３０の上面３６よりも高い位置
に、或いは少なくとも上面３６と同じ高さ位置に垂直部
２７の下端面２８が位置する。そのため、被覆体２０／
インペラー３０間の間隙Ｇが狭くならず、気泡分散装置
を溶湯Ｍに浸漬したとき、図５に示すように間隙Ｇは周
囲の溶湯Ｍに開放されている。When fixing the impeller 30 to the rotating shaft 10, first, the cover 20 is sandwiched and screwed into the female screw portion 31 of the impeller 30. The tapered surface of the tapered hole portion 25 of the cover 20 is changed to the cylindrical portion 3 with the screwing of the male screw portion 13.
2 so that the impeller 3
0 closely adheres to the coating body 20 without any gap. In addition, male screw part 1
3 is engraved on the reverse screw with the rotation direction of the impeller 30, so that the cover 2 is firmly fixed without loosening the screw during operation.
0 can be crimped. The assembled bubble dispersion device is shown in FIG.
The lower end surface 28 of the vertical portion 27 is located at a position higher than the upper surface 36 of the impeller 30 or at least at the same height position as the upper surface 36 as shown in FIG. Therefore, the coating 20 /
The gap G between the impellers 30 does not become narrow, and when the bubble dispersion device is immersed in the molten metal M, the gap G is opened to the surrounding molten metal M as shown in FIG.
【００１０】開放された間隙Ｇは、溶湯循環流５を効果
的に安定化させる。すなわち、気泡分散装置を溶湯Ｍに
浸漬してインペラー３０を回転させるとき、羽根部３５
によって推力が付与された溶湯Ｍはインペラー３０の下
部からから送り出される。ここで、間隙Ｇが周囲の溶湯
Ｍに開放されているので、溶湯Ｍの送出し量に対応した
量の溶湯Ｍが間隙Ｇから被覆体２０／インペラー３０間
に流入する。その結果、溶湯容器６の内部に安定した溶
湯循環流５が発生する。この溶湯循環流５にインペラー
３０の噴出孔３４から精製ガスが吹き込まれるので、精
製ガスは微細気泡８として溶湯循環流５にのって溶湯容
器６内の溶湯Ｍに分散される。The open gap G effectively stabilizes the molten metal circulation flow 5. That is, when rotating the impeller 30 by immersing the bubble dispersing device in the molten metal M, the blade portion 35
The molten metal M to which the thrust is given is sent out from the lower part of the impeller 30. Here, since the gap G is open to the surrounding molten metal M, an amount of the molten metal M corresponding to the amount of the molten metal M flows from the gap G into the space between the coating body 20 and the impeller 30. As a result, a stable molten metal circulation flow 5 is generated inside the molten metal container 6. Since the purified gas is blown into the molten metal circulation flow 5 from the ejection hole 34 of the impeller 30, the purified gas is dispersed as fine bubbles 8 in the molten metal M in the molten metal container 6 along the molten metal circulation flow 5.
【００１１】この点、図１に示すように翼体１の側部及
び上部を被覆体４が覆っていると、翼体１の回転で押し
出された溶湯量に見合った量の溶湯３が翼体１／被覆体
４間に十分に供給されず、回転によって溶湯Ｍを下方に
移動させる推進力が弱くなり易い。その結果、翼体１／
被覆体４間に流入する溶湯量が不規則に変動し、溶湯循
環流５が不安定になりやすい。このようにして安定化さ
れた溶湯循環流５に精製ガスが吹き込まれるため、精製
ガスの微細気泡が溶湯Ｍに万遍なく行き渡り、ガス吹込
みによる精製効率が向上する。In this regard, as shown in FIG. 1, when the side and upper portions of the wing body 1 are covered with the covering body 4, the amount of molten metal 3 corresponding to the amount of molten metal extruded by the rotation of the wing body 1 is increased. Propelling force for moving the molten metal M downward by rotation is likely to be weakened due to insufficient supply between the body 1 and the coated body 4. As a result,
The amount of molten metal flowing between the coatings 4 fluctuates irregularly, and the molten metal circulation flow 5 tends to be unstable. Since the purified gas is blown into the molten metal circulation flow 5 stabilized in this way, fine bubbles of the purified gas are uniformly distributed throughout the molten metal M, and the purification efficiency by gas injection is improved.
【００１２】[0012]
【実施例】インペラー１の下方まで延びた被覆体４を備
えた気泡分散装置（従来例：図１）及びインペラー３０
の上面３６より６０ｍｍ高い位置に被覆体２０の下端面
２８がある気泡分散装置（本発明例：図４）を用い、被
覆体４又は２０の形状が脱ガス効率に及ぼす影響を調査
した。脱ガス処理される溶湯Ｍとしてアルミニウム合金
溶湯１０トンを溶湯保持処理炉に移した。本発明に従っ
た気泡分散装置を溶湯Ｍに浸漬し、吹込み速度６Ｎｍ 3
／時でＡｒ混合ガスを貫通孔１１及びガス噴出孔３４を
経て溶湯Ｍに吹き込みながら４００ｒｐｍでインペラー
３０を３０分間回転させた。処理後の溶湯Ｍに含まれて
いるガス含有量Ｘ2 を測定し、処理前のガス含有量Ｘ1
と比較して脱ガス効率η［＝（Ｘ1 −Ｘ2 ）／Ｘ1 ×１
００（％）］を求めた。調査結果を表１に示す。なお、
表１では、従来の気泡分散装置（図１）を用いて同じ条
件下で溶湯Ｍを脱ガス処理した場合を比較例として示
す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A coating 4 extending below an impeller 1 is provided.
Bubble dispersion device (conventional example: FIG. 1) and impeller 30
Lower end surface of the cover 20 at a position 60 mm higher than the upper surface 36 of the
28 using a bubble dispersing apparatus (Example of the present invention: FIG. 4).
Investigating the effect of the shape of the cover 4 or 20 on degassing efficiency
did. Aluminum alloy as molten metal M to be degassed
Ten tons of the molten metal were transferred to a molten metal holding furnace. According to the invention
Immersed in the molten metal M, blowing speed 6Nm Three
/ Hour through the through hole 11 and the gas ejection hole 34
Impeller at 400 rpm while blowing into molten metal M
30 was rotated for 30 minutes. Included in molten metal M after treatment
Gas content XTwo And the gas content X before processing1
Degassing efficiency η [= (X1 -XTwo ) / X1 × 1
00 (%)]. Table 1 shows the survey results. In addition,
In Table 1, the same conditions were obtained using a conventional bubble dispersing apparatus (FIG. 1).
The case where the molten metal M was degassed under the above conditions is shown as a comparative example.
You.
【００１３】 [0013]
【００１４】表１にみられるように、本発明に従った気
泡分散装置を用いて溶湯Ｍを脱ガス処理した場合、何れ
も従来の気泡分散装置を用いた脱ガス処理に比較して格
段に高い脱ガス効率を示した。脱ガス処理時に炉内を観
察すると、従来の気泡分散装置を用いた脱ガス処理で
は、溶湯Ｍに吹き込まれたＡｒガスが気泡分散装置近傍
の溶湯表面に大きな気泡となってぼこぼこと排出される
様子が観察された。大きな気泡の湧出は、溶湯Ｍの内部
で安定的な気泡分散が阻害されていることを意味する。
他方、本発明に従った気泡分散装置を用いた脱ガス処理
では、溶湯表面に達する気泡が安定的に微細化されてお
り、溶湯表面でぱちぱちはじける様子が観察された。こ
の溶湯表面における気泡の湧出形態からしても、吹き込
まれたＡｒガスが脱ガス反応に有効に寄与していること
が判る。As can be seen from Table 1, when the molten metal M is degassed by using the bubble dispersing device according to the present invention, the degassing process is significantly different from the degassing process using the conventional bubble dispersing device. It showed high degassing efficiency. When observing the inside of the furnace during the degassing process, in the degassing process using the conventional bubble dispersing device, the Ar gas blown into the molten metal M becomes large bubbles on the surface of the molten metal near the bubble dispersing device and is exhausted. The situation was observed. The spouting of large bubbles means that stable bubble dispersion is inhibited inside the melt M.
On the other hand, in the degassing treatment using the bubble dispersing device according to the present invention, the bubbles reaching the surface of the molten metal were stably miniaturized, and the appearance of flapping on the surface of the molten metal was observed. Even from the appearance of bubbles on the surface of the molten metal, it can be seen that the blown Ar gas effectively contributes to the degassing reaction.
【００１５】[0015]
【発明の効果】以上に説明したように、本発明の気泡分
散装置は、インペラーの上部に設ける被覆体がインペラ
ーの周囲に閉鎖空間を形成しないように、インペラーの
上面と同じ高さ又は上面よりも高い位置に被覆体の底面
を設定している。これにより、周囲の溶湯が被覆体／イ
ンペラー間に流入する抵抗が少なくなり、インペラーで
推力が与えられた押し出される溶湯量に見合った量の溶
湯が被覆体／インペラー間に容易に流入し、下方に向か
った強い流動力が溶湯に与えられるので、溶湯容器内に
生じる溶湯循環流が安定化する。安定した溶湯循環流に
精製ガスが吹き込まれるため、精製ガスが微細気泡とし
て溶湯容器内の溶湯に万遍なく行き渡り、ガス吹込みに
よる精製効率が向上する。As described above, the bubble dispersing device of the present invention has a height equal to or higher than the upper surface of the impeller so that the covering provided on the impeller does not form a closed space around the impeller. Also set the bottom surface of the covering at a higher position. Thereby, the resistance of the surrounding molten metal flowing between the coating body and the impeller is reduced, and the molten metal having an amount corresponding to the amount of molten metal to be thrusted by the impeller easily flows between the coating body and the impeller. Is applied to the molten metal, so that the molten metal circulating flow generated in the molten metal container is stabilized. Since the purified gas is blown into the stable molten metal circulation flow, the purified gas is uniformly distributed as fine bubbles to the molten metal in the molten metal container, and the purification efficiency by gas injection is improved.
【図１】 従来の被覆体を備えた気泡分散装置FIG. 1 shows a conventional bubble dispersing apparatus provided with a coating.
【図２】 本発明に従った気泡分散装置の分解斜視図FIG. 2 is an exploded perspective view of a bubble dispersing device according to the present invention.
【図３】 垂直部をもつ被覆体（ａ）及びカバー部がフ
ラットな被覆体（ｂ）の断面図FIG. 3 is a cross-sectional view of a cover (a) having a vertical portion and a cover (b) having a flat cover portion.
【図４】 回転軸に被覆体及びインペラーを装着した気
泡分散装置の要部断面図FIG. 4 is a cross-sectional view of a main part of a bubble dispersion device in which a coating body and an impeller are mounted on a rotating shaft.
【図５】 本発明に従った気泡分散装置を使用して溶湯
を脱ガス処理している状態の説明図FIG. 5 is an explanatory view of a state in which a molten metal is degassed using the bubble dispersing device according to the present invention.
５：溶湯循環流 ６：溶湯容器 ８：微細気泡 １０：回転軸 １１：貫通孔 １３：雄ネジ部 ２０：被覆体 ２２：装着用筒部 ２３：段差部
２４：小径部 ２５：テーパ状孔部 ２６：カバ
ー部 ２７：垂直部 ２８：垂直部の下端面 インペラー３０： ３１：雌ネジ部 ３２：筒状部
３４：噴出孔 ３５：羽根部 ３６：上面 α：羽根部の傾斜角 Ｇ：被覆体／インペラーの間
隙 Ｍ：溶湯5: Molten metal circulation flow 6: Molten container 8: Fine bubbles 10: Rotating shaft 11: Through hole 13: Male screw part 20: Coating body 22: Mounting cylinder part 23: Step part
24: small diameter portion 25: tapered hole portion 26: cover portion 27: vertical portion 28: lower end surface of the vertical portion impeller 30: 31: female screw portion 32: cylindrical portion 34: ejection hole 35: blade portion 36: upper surface α : Inclination angle of blade part G: Cover / impeller gap M: Molten metal
フロントページの続き (72)発明者 加藤 彰 静岡県庵原郡蒲原町蒲原161番地 日本軽 金属株式会社蒲原工場内 (72)発明者 久保田 昇 静岡県庵原郡蒲原町蒲原161番地 日本軽 金属株式会社蒲原工場内 (72)発明者 佐野 剛 静岡県庵原郡蒲原町蒲原161番地 日本軽 金属株式会社蒲原工場内 (72)発明者 橋本 義介 静岡県庵原郡蒲原町蒲原161番地 日本軽 金属株式会社蒲原工場内 Ｆターム(参考） 4G035 AB14 AB17 AE13 4G078 AA01 AB01 AB11 BA05 CA01 CA05 CA12 DA21 DB10 DC06 EA10 4K001 AA02 BA23 EA03 GB03 4K013 BA09 BA14 CA02 CA11 CA16 CC02 CC09 Continued on the front page (72) Inventor Akira Kato 161 Kambara, Kambara-cho, Abara-gun, Shizuoka Prefecture Inside the Nippon Light Metal Co., Ltd. Kambara Plant Inside the plant (72) Inventor Tsuyoshi Sano 161 Kambara, Kambara-cho, Anbara-gun, Shizuoka Prefecture Inside the Kambara Plant of Nippon Light Metal Co., Ltd. F term (reference) 4G035 AB14 AB17 AE13 4G078 AA01 AB01 AB11 BA05 CA01 CA05 CA12 DA21 DB10 DC06 EA10 4K001 AA02 BA23 EA03 GB03 4K013 BA09 BA14 CA02 CA11 CA16 CC02 CC09
Claims (1)
びる回転軸と、回転軸の下端に螺合され、半径方向外向
きに広がったカバー部をもつ被覆体と、回転軸の下端に
螺合され、回転軸の貫通孔に一致するガス噴出孔が軸方
向に貫通して形成され、傾斜した複数の羽根部が円周方
向に等間隔で周面に形成されたインペラーとを備え、イ
ンペラーの上面と同じ高さ又はインペラーの上面よりも
高い位置にカバー部の底面が設定されている溶湯への気
泡分散装置。1. A cover having a rotary shaft having a through-hole for supplying purified gas extending in an axial direction, a cover screwed to a lower end of the rotary shaft and extending outward in a radial direction, and a lower end of the rotary shaft. A screw hole is formed, and a gas ejection hole corresponding to the through hole of the rotating shaft is formed so as to penetrate in the axial direction, and an impeller in which a plurality of inclined blade portions are formed on the peripheral surface at equal intervals in the circumferential direction, An apparatus for dispersing air bubbles in a molten metal in which a bottom surface of a cover portion is set at the same height as the upper surface of the impeller or at a position higher than the upper surface of the impeller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11614099A JP3465624B2 (en) | 1999-04-23 | 1999-04-23 | Bubble dispersion device for molten metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11614099A JP3465624B2 (en) | 1999-04-23 | 1999-04-23 | Bubble dispersion device for molten metal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000309829A true JP2000309829A (en) | 2000-11-07 |
| JP3465624B2 JP3465624B2 (en) | 2003-11-10 |
Family
ID=14679742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11614099A Expired - Fee Related JP3465624B2 (en) | 1999-04-23 | 1999-04-23 | Bubble dispersion device for molten metal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3465624B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006218534A (en) * | 2005-02-14 | 2006-08-24 | Kobe Steel Ltd | Method for removing inclusion in molten steel |
| EP1820866A1 (en) | 2006-02-13 | 2007-08-22 | Hydro Aluminium Deutschland GmbH | Aluminiumcarbide-free aluminium alloy |
| JP2014073513A (en) * | 2012-10-04 | 2014-04-24 | Hitachi Metals Ltd | Rotation body for stirring molten metal |
| US9914318B2 (en) | 2005-10-19 | 2018-03-13 | Hydro Aluminium Deutschland Gmbh | Aluminum strip for lithographic printing plate supports |
| JPWO2021205623A1 (en) * | 2020-04-09 | 2021-10-14 |
-
1999
- 1999-04-23 JP JP11614099A patent/JP3465624B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006218534A (en) * | 2005-02-14 | 2006-08-24 | Kobe Steel Ltd | Method for removing inclusion in molten steel |
| JP4669299B2 (en) * | 2005-02-14 | 2011-04-13 | 株式会社神戸製鋼所 | Method for removing inclusions in molten steel |
| US9914318B2 (en) | 2005-10-19 | 2018-03-13 | Hydro Aluminium Deutschland Gmbh | Aluminum strip for lithographic printing plate supports |
| EP1820866A1 (en) | 2006-02-13 | 2007-08-22 | Hydro Aluminium Deutschland GmbH | Aluminiumcarbide-free aluminium alloy |
| WO2007093605A1 (en) * | 2006-02-13 | 2007-08-23 | Hydro Aluminium Deutschland Gmbh | Aluminium alloy free from aluminium carbide |
| US8869875B2 (en) | 2006-02-13 | 2014-10-28 | Hydro Aluminium Deutschland Gmbh | Aluminum alloy free from aluminum carbide |
| JP2014073513A (en) * | 2012-10-04 | 2014-04-24 | Hitachi Metals Ltd | Rotation body for stirring molten metal |
| JPWO2021205623A1 (en) * | 2020-04-09 | 2021-10-14 | ||
| JP7109014B2 (en) | 2020-04-09 | 2022-07-29 | 日本軽金属株式会社 | Air bubble disperser and impeller |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3465624B2 (en) | 2003-11-10 |
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