JP2011184755A - Agitator for molten metal - Google Patents

Agitator for molten metal Download PDF

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Publication number
JP2011184755A
JP2011184755A JP2010052290A JP2010052290A JP2011184755A JP 2011184755 A JP2011184755 A JP 2011184755A JP 2010052290 A JP2010052290 A JP 2010052290A JP 2010052290 A JP2010052290 A JP 2010052290A JP 2011184755 A JP2011184755 A JP 2011184755A
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molten metal
shaft
stirrer
gas
air passage
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JP5486357B2 (en
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Tetsuya Uchino
哲也 内野
Hideki Tsutsumi
英気 堤
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Mitsui Mining and Smelting Co Ltd
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Mitsui Mining and Smelting Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an agitator for molten metal which can prevent the clogging of a shaft due to molten metal. <P>SOLUTION: The agitator 1 for molten metal has a shaft 2 whose inside is made into a ventilation path 22 through which a blowing gas can be circulated, and the ventilation path 22 is provided with a clogging prevention part 4 making the blowing gas pass through and further cutting-off the raise of molten metal. The clogging prevention part 4 can be formed in such a manner that the ventilation path 22 is disposed with a pipe material clogging the lower edge part and provided with one or more blowing-out holes 41 at the circumferential face. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、アルミニウムなどの金属溶湯の脱ガス処理をするために用いる金属溶湯用攪拌体に関する。   The present invention relates to a molten metal stirrer used for degassing a molten metal such as aluminum.

従来の金属溶湯用攪拌体１０は、図９に示すように、脱ガス装置１１に取り付け、アルミニウム、アルミニウム合金などの金属溶湯１２に浸漬させて金属溶湯１２の脱ガス処理を行うために用いるものであり、例えば、シャフト１３は、アルゴン、窒素などの吹き込みガスが通過できる円筒状としてあり、シャフト１３の下端に円盤状の攪拌羽根１４を設けた構成としてある（例えば、下記特許文献１〜４参照）。   As shown in FIG. 9, a conventional molten metal stirring member 10 is attached to a degassing device 11 and is used for degassing the molten metal 12 by being immersed in a molten metal 12 such as aluminum or aluminum alloy. For example, the shaft 13 has a cylindrical shape through which a blowing gas such as argon or nitrogen can pass, and has a configuration in which a disc-shaped stirring blade 14 is provided at the lower end of the shaft 13 (for example, Patent Documents 1 to 4 below) reference).

実開平６−７３７００号公報Japanese Utility Model Publication No. 6-73700 特開平７−５４０５９号公報Japanese Patent Laid-Open No. 7-54059 特開２００１−５９１２２号公報JP 2001-59122 A 特開２００８−１０５０８４号公報JP 2008-105084 A

このような攪拌体１０を用いて行う脱ガス処理は、シャフト１３の下端から吹き込みガスを放出させながら、攪拌羽根１４を回転させて行い、これにより、吹き込みガスが金属溶湯１２中の水素などの不純物を取り込みながら上昇し、不純物を除去することができるものである。   The degassing process performed using such a stirring body 10 is performed by rotating the stirring blade 14 while discharging the blown gas from the lower end of the shaft 13, whereby the blown gas is made into hydrogen or the like in the molten metal 12. It rises while taking in impurities, and can remove impurities.

しかし、金属溶湯用攪拌体１０のシャフト１３の下端は開放形状としてあるため、攪拌体１０は、吹き込みガスを放出させながら、長時間回転させると、シャフト１３内部に浸入した金属溶湯１２が上方まで舞い上がることがあり、図１０に示すように、溶湯１２の湯面よりも上方に達すると急激に冷却されて内部で固化して塊１５を作り、シャフト１３を閉塞してしまい、吹き込みガスが放出できない事態が生じることがあった。   However, since the lower end of the shaft 13 of the metal melt agitator 10 is open, when the agitator 10 is rotated for a long time while releasing the blown gas, the metal melt 12 that has entered the shaft 13 reaches the top. As shown in FIG. 10, when it reaches above the surface of the molten metal 12, it rapidly cools and solidifies inside to form a lump 15, closing the shaft 13, and blowing gas is released. There was a situation that could not be done.

そこで、本発明の目的は、金属溶湯によるシャフトの閉塞を防止することができる金属溶湯用攪拌体を提供することにある。   Then, the objective of this invention is providing the stirring body for molten metal which can prevent the obstruction | occlusion of the shaft by a molten metal.

本発明の金属溶湯用攪拌体は、内部を吹き込みガスが流通可能な通気路としたシャフトを有する金属溶湯用攪拌体において、該通気路に、吹き込みガスを通過させるとともに、金属溶湯が上昇するのを遮断する閉塞防止部を設けたことを特徴とする。   The metal melt stirrer of the present invention is a metal melt stirrer having a shaft that has an air passage through which the blown gas can flow, and allows the blown gas to pass through the air passage and the molten metal rises. The present invention is characterized in that a blockage prevention unit for blocking the above is provided.

本発明の金属溶湯用攪拌体は、シャフトの通気路に金属溶湯が上昇するのを遮断する閉塞防止部を設けたため、内部に浸入した金属溶湯がシャフトの上方まで舞い上がらずに跳ね返され、これにより、通気路内で金属溶湯が固化することを防止することができる。   The stirring member for molten metal according to the present invention is provided with a blockage preventing portion for blocking the rising of the molten metal in the air passage of the shaft, so that the molten metal that has entered the inside is rebounded without flying up to the upper side of the shaft. It is possible to prevent the molten metal from solidifying in the air passage.

本発明の一実施形態の金属溶湯用攪拌体を用いた脱ガス装置を示した概略断面図である。It is the schematic sectional drawing which showed the degassing apparatus using the stirring body for molten metal of one Embodiment of this invention. 図１の攪拌体の構成部品であるシャフトの下端側を示した拡大断面図である。It is the expanded sectional view which showed the lower end side of the shaft which is a component of the stirring body of FIG. 図１の攪拌体の構成部品であるシャフトの一変形例を示し、その下端側を示した拡大断面図である。It is the expanded sectional view which showed the modification of the shaft which is a component of the stirring body of FIG. 1, and showed the lower end side. 図１の攪拌体の上端部側を示した拡大断面図である。FIG. 2 is an enlarged cross-sectional view showing an upper end side of the stirring body in FIG. 1. 図１の攪拌体の上端部側を示した分解斜視図である。It is the disassembled perspective view which showed the upper end part side of the stirring body of FIG. 図１の攪拌体の構成部品である閉塞防止部を示し、（Ａ）は斜視図、（Ｂ）は断面図である。The blockage prevention part which is a component of the stirring body of FIG. 1 is shown, (A) is a perspective view, (B) is sectional drawing. 図１の攪拌体の構成部品である閉塞防止部の一変形例を示した拡大断面図である。It is the expanded sectional view which showed the modification of the obstruction | occlusion prevention part which is a component of the stirring body of FIG. 図１の攪拌体の構成部品である閉塞防止部の他の変形例を示した拡大断面図である。FIG. 10 is an enlarged cross-sectional view showing another modification of the blockage prevention unit that is a component of the stirring body in FIG. 1. 従来の攪拌体を用いた脱ガス装置の一例を示した概略断面図である。It is the schematic sectional drawing which showed an example of the degassing apparatus using the conventional stirring body. 従来の攪拌体の不具合状態を示した概略断面図である。It is the schematic sectional drawing which showed the malfunctioning state of the conventional stirring body.

以下、本発明を、金属溶湯用攪拌体の一実施形態に基づいて説明する。   Hereinafter, this invention is demonstrated based on one Embodiment of the stirring body for molten metal.

本発明の一実施形態の金属溶湯用攪拌体１は、図１に示すように、シャフト２の通気路２２に閉塞防止部４を設けたことを特徴とするものである。   As shown in FIG. 1, the molten metal stirrer 1 according to one embodiment of the present invention is characterized in that a blockage preventing portion 4 is provided in the air passage 22 of the shaft 2.

シャフト２は、図１又は２に示すように、下端部側には攪拌羽根２１が取り付けてあり、シャフト２の内部を吹き込みガスが通る通気路２２とした円筒形状としてある。シャフト２の底面２３には金属溶湯中に吹き込みガスを噴出するガス噴射口２４が設けてある。
ガス噴出口２４の内径は、シャフト２の内径に対して１％〜５０％、特に１０％〜２５％に形成するのが好ましい。ガス噴出口２３の内径を、この範囲にすることにより、金属溶湯がシャフト２内に入りにくくなるとともに吹き込みガスを微細な泡にして噴出することができる。
ガス噴出口２４は、図２に示すように、シャフト２の内周面２５に設けたテーパ部２６で滑らかに内周面２５と連ならせてある。このように内周面２５とガス噴出口２４とを滑らかに連ならせることにより、吹き込みガスの乱流を防止でき、金属溶湯の浸入をより防止することができる。
テーパ部２６の傾斜角は、底面２３に対して１０°〜８０°、特に３０°〜６０°に形成するのが好ましい。
シャフト２及び攪拌羽根２１は、窒化珪素系セラミックス、サイアロン系セラミックス、炭化珪素系セラミックス、カーボンセラミックス、カーボン、チタン酸アルミなどから形成することができる。 As shown in FIG. 1 or 2, the shaft 2 has a stirring blade 21 attached to the lower end side, and has a cylindrical shape as a ventilation path 22 through which the blown gas passes through the inside of the shaft 2. The bottom surface 23 of the shaft 2 is provided with a gas injection port 24 through which gas is blown into the molten metal.
The inner diameter of the gas outlet 24 is preferably 1% to 50%, more preferably 10% to 25% with respect to the inner diameter of the shaft 2. By setting the inner diameter of the gas outlet 23 within this range, it is difficult for the molten metal to enter the shaft 2 and the injected gas can be ejected as fine bubbles.
As shown in FIG. 2, the gas outlet 24 is smoothly connected to the inner peripheral surface 25 by a tapered portion 26 provided on the inner peripheral surface 25 of the shaft 2. In this way, by smoothly connecting the inner peripheral surface 25 and the gas ejection port 24, it is possible to prevent the turbulent flow of the blown gas and further prevent the molten metal from entering.
The inclination angle of the tapered portion 26 is preferably 10 ° to 80 °, particularly 30 ° to 60 ° with respect to the bottom surface 23.
The shaft 2 and the stirring blade 21 can be formed from silicon nitride ceramics, sialon ceramics, silicon carbide ceramics, carbon ceramics, carbon, aluminum titanate, or the like.

本実施形態では、シャフト２の内周面２５にテーパ部２６を設けてあるが、図３に示すように、曲面状に形成したＲ部２７を設けて内周面２５とガス噴出口２４とを滑らかに連ならせてもよく、この場合、Ｒ部２７の曲率を０．０１〜０．２（１／ｍｍ）、特に０．０３〜０．１（１/ｍｍ）にするのが好ましい。   In the present embodiment, the tapered portion 26 is provided on the inner peripheral surface 25 of the shaft 2, but as shown in FIG. 3, an R portion 27 formed in a curved surface is provided, and the inner peripheral surface 25, the gas outlet 24, In this case, it is preferable that the curvature of the R portion 27 is 0.01 to 0.2 (1 / mm), particularly 0.03 to 0.1 (1 / mm). .

シャフト２の上端側には、図１又は４に示すように、フランジ部材３が取り付けてあり、シャフト２を回転させる駆動部５に連結できるとともに閉塞防止部４を取り付けることができるようしてある。
フランジ部材３は、図４又は５に示すように、下側部材６と上側部材７との上下に分割できるように形成してある。これは金属素材等で形成するのが好ましい。 As shown in FIG. 1 or 4, a flange member 3 is attached to the upper end side of the shaft 2, so that it can be connected to a drive unit 5 that rotates the shaft 2 and can be attached to a blocking prevention unit 4. .
As shown in FIG. 4 or 5, the flange member 3 is formed so that it can be divided into a lower member 6 and an upper member 7. This is preferably formed of a metal material or the like.

下側部材６は、左右対称に二分割できるように形成してあり、シャフト２の上端部側を挟み込む円筒状の挟み込み部６１と、その上端部から外方に張り出した円形状の張出部６２と、挟み込み部６１の周面から上下方向に沿い矩形状に張り出した固定部６３とを形成してある。
挟み込み部６１の内径は、シャフト２の外径と略同じ又は外径よりも若干大きく形成してある。
張出部６２の面上には、周方向に六箇所の円孔６４が設けてある。
固定部６３の面上には、上下に二箇所の円孔６５が形成してあり、この円孔６５に締結部材を挿し通して締結することにより、シャフト２にフランジ部３を固定できるようにしてある。 The lower member 6 is formed so as to be bilaterally symmetric, and has a cylindrical sandwiching portion 61 that sandwiches the upper end side of the shaft 2 and a circular projecting portion that projects outward from the upper end portion. 62 and a fixing portion 63 projecting in a rectangular shape from the peripheral surface of the sandwiching portion 61 in the vertical direction.
The inner diameter of the sandwiching portion 61 is formed to be substantially the same as or slightly larger than the outer diameter of the shaft 2.
On the surface of the overhang portion 62, six circular holes 64 are provided in the circumferential direction.
On the surface of the fixing portion 63, two circular holes 65 are formed on the upper and lower sides, and a fastening member is inserted into the circular hole 65 and fastened to fix the flange portion 3 to the shaft 2. It is.

上側部材７は、中心にシャフト２と連通する円孔７１を設けた円板状に形成してあり、下側部材６の張出部６２上に載る形状としてある。
上側部材７の円孔７１の上側縁部は段状に形成し、閉塞防止部材４が取り付けできる取付部７２としてある。
上側部材７の面上には、周方向に六箇所の円孔７３が設けてあり、張出部６２の円孔６４と連通するように形成してある。 The upper member 7 is formed in a disk shape having a circular hole 71 communicating with the shaft 2 at the center, and is shaped to be placed on the overhanging portion 62 of the lower member 6.
The upper edge portion of the circular hole 71 of the upper member 7 is formed in a step shape, and serves as an attachment portion 72 to which the blocking prevention member 4 can be attached.
On the surface of the upper member 7, six circular holes 73 are provided in the circumferential direction, and are formed so as to communicate with the circular holes 64 of the projecting portion 62.

閉塞防止部４は、吹き込みガスを通過させるとともに、気体、液体や固体などの直進を遮る作用をし、金属溶湯が上昇するのを遮断するものであり、図４又は６に示すように、下端部を閉塞し、周面に吹き込みガスを通過させる吹き出し孔４１を形成し、上端部に外方に円形状に張り出したフランジ部４２を形成したパイプ材としてある。
閉塞防止部４は、シャフト２の通気路２２に配してあり、シャフト２の内周面と適宜な間隔を設けて配してある。
閉塞防止部４の外径は、シャフト２の内径に対して１０％〜５０％、特に１５％〜３０％に形成するのが好ましい。また、閉塞防止部４の長さは、５ｍｍ〜５００ｍｍ、特に５０ｍｍ〜１５０ｍｍに形成するのが好ましい。 The blockage prevention unit 4 allows the blown gas to pass therethrough and acts to block the straight advance of gas, liquid, solid, etc., and blocks the rise of the molten metal, as shown in FIG. The pipe member is formed by closing a portion, forming a blow-out hole 41 through which gas is blown into the peripheral surface, and forming a flange portion 42 protruding outward in a circular shape at the upper end portion.
The blocking prevention unit 4 is disposed in the air passage 22 of the shaft 2 and is disposed at an appropriate interval from the inner peripheral surface of the shaft 2.
The outer diameter of the blocking prevention portion 4 is preferably 10% to 50%, particularly 15% to 30% with respect to the inner diameter of the shaft 2. The length of the blocking prevention part 4 is preferably 5 mm to 500 mm, particularly 50 mm to 150 mm.

フランジ部４２は、フランジ部３の取付部７２に嵌め込むことができるようにしてある。
閉塞防止部４は、特に限定するものではないが、フランジ部３と同じ金属で形成することが好ましく、このようにすることにより、フランジ部３と同じように膨張又は収縮するため破損などが起こりにくくなる。 The flange portion 42 can be fitted into the attachment portion 72 of the flange portion 3.
The blocking prevention portion 4 is not particularly limited, but is preferably formed of the same metal as the flange portion 3, and by doing so, the expansion or contraction is caused in the same manner as the flange portion 3, so that damage or the like occurs. It becomes difficult.

駆動部５は、下方側に突出した円筒状の連結部５１が形成してあり、シャフト２及び攪拌羽根２１を回転させるとともに吹き込みガスをシャフト２の通気路２２に送り出せるように形成してある。連結部５１の下端側には、外方に張り出した円形状のフランジ部５２が形成してあり、この面上には周方向に六箇所の円孔５３が形成してある。この円孔５３を、図４に示すように、フランジ部３の円孔６４，７３と連通させ、これらに締結部材を挿し通し、フランジ部３を取り付けできるようにしてある。   The driving part 5 is formed with a cylindrical connecting part 51 projecting downward, and is formed so as to rotate the shaft 2 and the stirring blade 21 and to send the blown gas into the air passage 22 of the shaft 2. . A circular flange portion 52 projecting outward is formed on the lower end side of the connecting portion 51, and six circular holes 53 are formed in the circumferential direction on this surface. As shown in FIG. 4, the circular hole 53 communicates with the circular holes 64 and 73 of the flange portion 3, and a fastening member is inserted into the circular holes 64 and 73 so that the flange portion 3 can be attached.

このような攪拌体１を用いてアルミニウムなどの金属溶湯の脱ガス処理をすると、吹き込みガスは、閉塞防止部４の周面の吹き出し孔５１から流れ出て、吹き込みガスを金属溶湯中に送り出すことができる。金属溶湯が、通気路２２内に浸入し舞い上げられたとしても、閉塞防止部４により、それよりも上方には到達されず、シャフト２が閉塞しにくくなる。   When the degassing process of the molten metal such as aluminum is performed using such a stirring body 1, the blown gas can flow out from the blowout holes 51 on the peripheral surface of the clogging prevention unit 4, and send the blown gas into the molten metal. it can. Even if the molten metal enters the air passage 22 and moves up, the blockage prevention unit 4 does not reach the upper side, and the shaft 2 is difficult to block.

本実施形態では、閉塞防止部４を、パイプ材で形成してあるが、これに限定するものではなく、吹き込みガスを通過させるとともに、金属溶湯が直接的に上昇するのを遮断することができればよく、例えば、通気路に、セラミックスなどの連通孔を有する多孔体を配したり、図７に示すように、ハニカム構造体４３を配したり、図８に示すように、折り曲げたパイプ材４４を配したりしてもよい。   In the present embodiment, the blocking prevention portion 4 is formed of a pipe material, but is not limited to this, and it is possible to allow the blown gas to pass through and prevent the molten metal from rising directly. Well, for example, a porous body having communication holes such as ceramics is arranged in the air passage, a honeycomb structure 43 is arranged as shown in FIG. 7, or a pipe material 44 bent as shown in FIG. May be arranged.

上記実施形態の構成態様は、本発明を限定するものとして挙げたものではなく、技術目的を共通にするかぎり変更は可能であり、本発明はそのような変更を含むものである。   The configuration aspect of the above embodiment is not intended to limit the present invention, but can be changed as long as the technical purpose is common, and the present invention includes such a change.

１金属溶湯用攪拌体
２シャフト
２１攪拌羽根
２２通気路
２３底面
２４噴出口
２５内周面
２６テーパ部
２７Ｒ部
３フランジ部
６下側部材
６１挟み込み部
６２フランジ部
６３固定部
６４円孔
６５円孔
７上側部材
７１円孔
７２取付部
７３円孔
４閉塞防止部
４１吹き出し孔
４２フランジ部
５駆動部
５１連結部
５２フランジ部
５３円孔 1 Stirrer for molten metal
2 shafts 21 stirring blades 22 air passages 23 bottom surfaces 24 jet outlets 25 inner peripheral surfaces 26 taper portions 27R portions 3 flange portions 6 lower members 61 sandwiching portions 62 flange portions 63 fixed portions 64 circular holes 65 circular holes 7 upper members 71 circular holes 72 mounting part 73 circular hole 4 blocking prevention part 41 blowing hole 42 flange part 5 drive part 51 connecting part 52 flange part 53 circular hole

Claims (9)

内部を吹き込みガスが流通可能な通気路としたシャフトを有する金属溶湯用攪拌体において、該通気路に、吹き込みガスを通過させるとともに、金属溶湯が上昇するのを遮断する閉塞防止部を設けた金属溶湯用攪拌体。   A metal melt agitator having a shaft that has an air passage through which blown gas can flow, and is provided with a blockage prevention portion that allows the blown gas to pass through the vent passage and blocks the molten metal from rising. Stirrer for molten metal. 閉塞防止部は、通気路に、下端部を閉塞し、周面に１箇所以上の吹き出し孔を設けたパイプ材を配して形成した請求項１に記載の金属溶湯用攪拌体。   2. The molten metal stirrer according to claim 1, wherein the blocking prevention portion is formed by closing a lower end portion of the ventilation passage and a pipe member provided with one or more blowing holes on the peripheral surface. 閉塞防止部は、通気路に、ハニカム構造体又は多孔体を配して形成した請求項１に記載の金属溶湯用攪拌体。   The stirrer for molten metal according to claim 1, wherein the blockage preventing portion is formed by arranging a honeycomb structure or a porous body in the air passage. 閉塞防止部は、通気路に、折り曲げたパイプ材を配して形成した請求項１に記載の金属溶湯用攪拌体。   The stirrer for molten metal according to claim 1, wherein the blocking prevention part is formed by arranging a bent pipe material in the air passage. 前記シャフトの底面に設けたガス噴出口を、前記シャフトの内径の１％〜５０％の内径に形成した請求項１〜４のいずれかに記載の金属溶湯用攪拌体。   The stirrer for molten metal according to any one of claims 1 to 4, wherein a gas outlet provided on a bottom surface of the shaft is formed with an inner diameter of 1% to 50% of an inner diameter of the shaft. 前記シャフトは、内周面を、ガス噴出口に向けて窄まるように形成した請求項１〜５のいずれかに記載の金属溶湯用攪拌体。   The said shaft is the stirring body for molten metal in any one of Claims 1-5 formed so that an internal peripheral surface might narrow toward a gas jet nozzle. ガス噴射口に連なるテーパ部又はＲ部を設けて窄まるように形成した請求項６に記載の金属溶湯用攪拌体。   The stirrer for molten metal according to claim 6, wherein the stirrer is formed so as to be narrowed by providing a taper portion or an R portion connected to the gas injection port. 前記テーパ部の角度を、前記シャフトの底面に対して１０°〜８０°とした請求項７に記載の金属溶湯用攪拌体。   The stirrer for molten metal according to claim 7, wherein an angle of the tapered portion is 10 ° to 80 ° with respect to a bottom surface of the shaft. 前記Ｒ部の曲率を、０．０１〜０．２（１/ｍｍ）とした請求項７に記載の金属溶湯用攪拌体。   The stirrer for molten metal according to claim 7, wherein the curvature of the R part is 0.01 to 0.2 (1 / mm).
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CN108817330A (en) * 2018-07-06 2018-11-16 安徽思源三轻智能制造有限公司 A kind of casting stirring exhaust apparatus

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CN111672164A (en) * 2020-06-19 2020-09-18 北京博创朔方科技有限公司 Degassing and mixing device for casting aluminum alloy section

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