JPH01259135A - Rotary nozzle for removing impurity in molten metal - Google Patents
Rotary nozzle for removing impurity in molten metalInfo
- Publication number
- JPH01259135A JPH01259135A JP8757488A JP8757488A JPH01259135A JP H01259135 A JPH01259135 A JP H01259135A JP 8757488 A JP8757488 A JP 8757488A JP 8757488 A JP8757488 A JP 8757488A JP H01259135 A JPH01259135 A JP H01259135A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- rotor
- rotary nozzle
- shaft
- gas
- 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.)
- Granted
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 62
- 239000002184 metal Substances 0.000 title claims abstract description 62
- 239000012535 impurity Substances 0.000 title claims abstract description 49
- 239000000919 ceramic Substances 0.000 claims abstract description 24
- 239000011148 porous material Substances 0.000 claims abstract description 11
- 238000007664 blowing Methods 0.000 claims abstract description 3
- 238000003756 stirring Methods 0.000 claims description 5
- 239000007789 gas Substances 0.000 abstract description 52
- 238000000034 method Methods 0.000 abstract description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 6
- 239000000155 melt Substances 0.000 abstract 5
- 238000004140 cleaning Methods 0.000 abstract 2
- 229910052581 Si3N4 Inorganic materials 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 239000001257 hydrogen Substances 0.000 abstract 1
- 229910052739 hydrogen Inorganic materials 0.000 abstract 1
- 229910003465 moissanite Inorganic materials 0.000 abstract 1
- 229910010271 silicon carbide Inorganic materials 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 18
- 229910052782 aluminium Inorganic materials 0.000 description 17
- 238000007254 oxidation reaction Methods 0.000 description 17
- 238000012545 processing Methods 0.000 description 12
- 239000011261 inert gas Substances 0.000 description 10
- 230000003647 oxidation Effects 0.000 description 10
- 238000000746 purification Methods 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 241000282485 Vulpes vulpes Species 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000007872 degassing Methods 0.000 description 2
- 238000010309 melting process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- WDQNIWFZKXZFAY-UHFFFAOYSA-M fentin acetate Chemical compound CC([O-])=O.C1=CC=CC=C1[Sn+](C=1C=CC=CC=1)C1=CC=CC=C1 WDQNIWFZKXZFAY-UHFFFAOYSA-M 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
【発明の詳細な説明】
（＆楽土の利用分野）
本発明は溶融金属の不純物除去用回転ノズルに関し、特
にアルミニウム溶湯の脱ガスおよび介在物除去に多用さ
れる回転ノズルに関する。Detailed Description of the Invention (& Field of Application of Rakudo) The present invention relates to a rotary nozzle for removing impurities from molten metal, and particularly to a rotary nozzle frequently used for degassing and removing inclusions from molten aluminum.
（従来の技術）
近年、アルミニウム製品の利用範囲が拡大するのに伴っ
て品質の向上が要求されている。そしてアルミニウム製
品の品質を向」二させるために、製品の素材となる鋳塊
の品質を高めることが重要であり、高品質の鋳塊は溶解
、鋳造工程で溶湯中の水素ガスおよび介在物を除去する
ことによって得られる。つまり脱ガスおよび介在物除去
を目的とした溶湯処理を行うことによって品質の高い鋳
塊を得ることができる。(Prior Art) In recent years, as the scope of use of aluminum products has expanded, improvements in quality have been required. In order to improve the quality of aluminum products, it is important to improve the quality of the ingots that are the material for the products.High quality ingots are made by eliminating hydrogen gas and inclusions in the molten metal during the melting and casting process. Obtained by removing. In other words, a high quality ingot can be obtained by performing molten metal treatment for the purpose of degassing and removing inclusions.
即ち、アルミニウムの溶湯には、原材料の溶解過程にお
いて発生する水素ガス、酸化物などの介在物が不純物と
して含まれており、これらの不純物が鋳塊に混入すると
、鋳物にピンホールが発生し、また熱間加工中や中間焼
鈍時におけるフクレなどの表面欠陥を生じて、機械的性
質、成形性。In other words, molten aluminum contains impurities such as hydrogen gas and inclusions such as oxides, which are generated during the melting process of raw materials, and when these impurities mix into the ingot, pinholes occur in the casting. In addition, surface defects such as blisters may occur during hot working or intermediate annealing, resulting in poor mechanical properties and formability.
加工性および表面処理性等の特性を低下させることにな
る。したがって、前記溶湯処理によって不純物の除去が
なされる。Characteristics such as processability and surface treatability will be deteriorated. Therefore, impurities are removed by the molten metal treatment.
アルミニウムの溶湯処理方法として、従来、第５図に示
すように、溶湯Ａに浸漬された不純物除去用回転ノズル
ＢをモータＣによって回転駆動するとともに、不純物除
去用回転ノズルＢに形成されている送気通路（図示せず
）を通して、例えば不活性ガスを微細気泡りとして溶湯
Ａに吹き込み、水素ガスおよび介在物を浮上分離させる
ようにした回転ノズルによるガスバブリング法が知られ
ている。Conventionally, as shown in FIG. 5, a method for processing molten aluminum involves rotating a rotary nozzle B for removing impurities immersed in the molten metal A by a motor C, and also rotating a rotary nozzle B formed in the rotary nozzle B for removing impurities. A gas bubbling method using a rotating nozzle is known in which, for example, inert gas is blown into the molten metal A in the form of fine bubbles through an air passage (not shown) to float and separate hydrogen gas and inclusions.
この溶湯処理方法によれば、アルミニウム溶湯Ａにでき
るだけ微細な不活性ガス気泡りを分散放出させるととも
に、溶湯Ａを適度に攪拌して溶湯Ａと気泡りを積極的に
接触させることによって、不純物の除去を行う。したが
って、溶湯Ａにできるだけ微細な不活性ガス気泡りを分
散放出させることが溶湯処理での大きな課題であり、微
細な不活性ガス気泡を分散放出させるのに適した不純物
除去用回転ノズルＢが種々提案されている。According to this molten metal processing method, impurities are removed by dispersing and releasing inert gas bubbles as fine as possible into the molten aluminum metal A, and by stirring the molten metal A moderately to bring the molten metal A into active contact with the bubbles. Perform removal. Therefore, dispersing and releasing as fine inert gas bubbles as possible into the molten metal A is a major challenge in molten metal processing, and there are various impurity removal rotary nozzles B suitable for dispersing and releasing the fine inert gas bubbles. Proposed.
前記不純物除去用回転ノズルＢは第６図および第７図に
示すように、シャフト部Ｂ１とこのシャフト部旧の下部
に設けられたロータ部Ｂ２を備えており、カーボンによ
って形成されている。そして、シャフト部Ｂ１の軸線に
沿って形成された送気通路ｂ１から送られる不活性ガス
が、ロータ部Ｂ２の中間部に形成されている出１」ｂ２
から放出され、放射状に形成しである１ｌＩＩｉｂ３お
よびこれらの溝ｂ３の外端に連続する外周切欠部ｂ４に
よって粉砕微細化して分散させるとともに、外周切欠部
ｂ４によって溶湯の攪拌を行うようになっている。As shown in FIGS. 6 and 7, the impurity removing rotary nozzle B includes a shaft portion B1 and a rotor portion B2 provided at the lower part of the shaft portion, and is made of carbon. The inert gas sent from the air supply passage b1 formed along the axis of the shaft part B1 is supplied to the outlet 1"b2 formed in the intermediate part of the rotor part B2.
The molten metal is released from the molten metal and is pulverized and dispersed by the radially formed grooves 1lIIb3 and outer circumferential notches b4 continuous to the outer ends of these grooves b3, and the molten metal is stirred by the outer circumferential notches b4. .
（発明が解決しようとする課題）
しかし、前記従来の不純物除去用回転ノズルＢはカーボ
ンによって形成されているから、７００’Ｃを越えるア
ルミニウム溶湯に浸漬して使用しても、耐熱性には問題
がないけれども、１耐摩耗性および耐酸化性に劣り短命
である。即ち、りん酸含浸等の耐酸化処理を施したカー
ボン回転ノズルを用いても酸化反応が起こって大きい損
耗を生じ、溶湯との摩擦によっても比較的大きい摩耗を
生じる。(Problem to be Solved by the Invention) However, since the conventional rotary nozzle B for removing impurities is made of carbon, there is a problem in heat resistance even if it is used by immersing it in molten aluminum exceeding 700'C. However, it has poor wear resistance and oxidation resistance and is short-lived. That is, even if a carbon rotary nozzle that has been subjected to oxidation-resistant treatment such as impregnated with phosphoric acid is used, oxidation reactions occur and cause a large amount of wear, and friction with the molten metal also causes a relatively large amount of wear.
その結果、回転ノズルの交換頻度が高くなって処理作業
性を低下させるばかりでなく、経済的にも不利な問題点
がある。As a result, the rotating nozzle must be replaced more frequently, which not only reduces processing efficiency but also poses an economical disadvantage.
そこで、不純物除去用回転ノズルを耐摩耗性および耐酸
化性にすぐれた緻密質セラミックスで形成することが考
えられるけれども、緻密質セラミックスは、機械加工性
がきわめて悪く、シャツｉ・部Ｂｌとロータ部Ｂ２の外
形はもとより、送気通路ｂｌ、出ロｂ２．放射状の溝ｂ
３および外周切欠部ｂ４等の加工が相当困難である上、
高価格である欠点を有している。Therefore, it is conceivable to form the rotary nozzle for removing impurities with dense ceramics that have excellent wear resistance and oxidation resistance, but dense ceramics have extremely poor machinability and are In addition to the external shape of B2, the air supply passage bl, outlet b2. radial groove b
3 and the outer peripheral notch b4 etc. are considerably difficult to process, and
It has the disadvantage of being expensive.
また、従来の不純物除去用回転ノズルＢでは、ロータ部
Ｂ２に形成された放射状の溝ｂ３と外周切欠部ｂ４を利
用して不活性ガス気泡を粉砕することによって微細化す
るようにしているから、不純物除去用回転ノズルＢを比
較的高速で回転させなけれはならない。In addition, in the conventional rotary nozzle B for removing impurities, the radial grooves b3 and the outer peripheral notch b4 formed in the rotor part B2 are used to crush inert gas bubbles to make them fine. The rotary nozzle B for removing impurities must be rotated at a relatively high speed.
しかし、ノズルを高速回転させると、湯面の酸化膜を巻
き込むだけでなく、湯面を乱して酸化量を増加さる原因
になり、しかも摩擦力が増大して摩耗が多くなる不都合
を生しる。そのために、従来はノズルを低速回転させ、
不活性ガスの流量を多くすることによって不活性ガス気
泡の微細化を補っている。したがって、当然、ガス消費
量が多くなり、経済的負担が大きくなる問題点を有して
いる。However, when the nozzle is rotated at high speed, it not only involves the oxide film on the surface of the hot water, but also disturbs the surface of the hot water and increases the amount of oxidation.Furthermore, the frictional force increases, causing more wear. Ru. To do this, conventionally the nozzle was rotated at low speed,
The miniaturization of inert gas bubbles is compensated for by increasing the flow rate of inert gas. Naturally, therefore, there is a problem that the amount of gas consumed increases and the economic burden increases.
本発明はこのような事情に鑑みなされたもので、耐摩耗
性と耐酸化性にすぐれて延命化が達成され、その結果、
交換頻度を大幅に低下させて処理作業性の向上を図るこ
とができるとともに、加工性にすぐれ、かつ微細な浄化
ガス（不活性ガス等）気泡を分散放出させることによっ
て、低速回転下における浄化ガス消費量の低減を図り、
しかも低価格化の現実が可能な溶融金属の不純物除去用
回転ノズルを提供することを目的とする。The present invention was developed in view of the above circumstances, and has excellent wear resistance and oxidation resistance, thereby extending the life of the product.
In addition to significantly reducing the frequency of replacement and improving process workability, it also has excellent processability and disperses and releases fine purification gas (inert gas, etc.) bubbles, making it possible to remove purification gas even under low-speed rotation. In order to reduce consumption,
Moreover, it is an object of the present invention to provide a rotary nozzle for removing impurities from molten metal, which can be realized at a low cost.
（課題を解決するだめの手段）
前記目的を達成するために、本発明に係る第１発明は、
シャフト部とロータ部を偵ｊえた溶融金属の不純物除去
用回転ノズルを多孔質セラミックスて形成したものであ
る。(Means for solving the problem) In order to achieve the above object, the first invention according to the present invention includes:
A rotary nozzle for removing impurities from molten metal with a shaft and a rotor is formed of porous ceramic.
また、前記目的を達成するために、本発明に係る第２発
明は、シャフト部とロータ部を備えた溶融金属の不純物
除去用回転ノズルを多孔質セラミフクスで形成し、かつ
前記ロータ部−１面の浄化ガス放出部を前記シャフト部
およびロータ部よりも細孔径の大きい多孔質セラミック
スで形成したものである。Further, in order to achieve the above object, a second invention according to the present invention is such that a rotary nozzle for removing impurities from molten metal, which includes a shaft portion and a rotor portion, is formed of porous ceramic fuchs, and the first surface of the rotor portion The purified gas discharge section is formed of porous ceramics having a larger pore diameter than the shaft section and the rotor section.
（作用）
前記第１の発明によれば、耐摩耗性および耐酸化性か向
」ニするから、溶融金属との摩擦によって生じる厚耗、
溶融金属との酸化反応による損耗をそれぞれ抑制して延
命化が達成され交換頻度を大幅に低下させ、これにより
溶融金属の不純物除去処理の作業性を向」ニさせること
ができる。(Function) According to the first invention, since the wear resistance and oxidation resistance are improved, the wear resistance caused by friction with molten metal,
By suppressing wear and tear due to oxidation reactions with molten metal, the service life can be extended and the frequency of replacement can be significantly reduced, thereby improving the workability of removing impurities from molten metal.
また、前記第２の発明によれば、耐摩耗性および耐酸化
性か向」−するから、溶融金属との摩擦によって生しる
ｌｆｆ１７Ｌ、溶融金属との酸化反応によるＪｉｆ耗を
それぞれ抑制して延命化か達成され、交換頻度を大幅に
低下させ、これにより溶融金属の不純物除去処理の作業
性を向上させることができるとともに、シャフト部およ
びロータ部よりも細孔径の大きい多孔質セラミックスで
形成された浄化ガス放出部から微細な浄化ガス気泡を分
散放出させることかできるから、溶融金属と浄化ガス気
泡との接触状態が良好になる。したがって低速回転させ
ても浄化ガス消費量を低減できる。Further, according to the second invention, since the wear resistance and oxidation resistance are improved, Lff17L caused by friction with molten metal and JIF wear caused by oxidation reaction with molten metal are suppressed. The service life has been extended, the frequency of replacement has been significantly reduced, and the workability of removing impurities from molten metal has been improved. Since fine purifying gas bubbles can be dispersed and discharged from the purifying gas discharge section, the state of contact between the molten metal and the purifying gas bubbles is improved. Therefore, the amount of purified gas consumed can be reduced even if the rotation speed is low.
（実施例） 以下、本発明の実施例を図面に基いて説明する。(Example) Embodiments of the present invention will be described below with reference to the drawings.
第１図は本発明に係る第１の発明の実施例を一部断面に
て示す正面図、第２図は拡大底面図を示し、これらの図
において不純物除去用回転ノズル１は細長状のシャフト
部１０と、このシャフト部１゜の下部に設けられた大径
円盤状のロータ部２ｏとからなり、それぞれは、ＳｉＣ
，５ｉ３Ｎｎ 、 Ａ文２０３．サイアロン或いはそれ
らの複合体によってなり、かつ０゜１〜］００ｇｍの４
＋１孔径の気泡を持つ多孔質セラミフクスによって形成
されている。FIG. 1 is a partially sectional front view of a first embodiment of the present invention, and FIG. 2 is an enlarged bottom view. portion 10, and a large-diameter disc-shaped rotor portion 2o provided at the lower part of this shaft portion 1°, each of which is made of SiC.
, 5i3Nn, A sentence 203. Made of Sialon or a composite thereof, and 0゜1~]00gm 4
It is formed by porous ceramic fuchs with bubbles of +1 pore size.
シャフト部１０には１１〜１１線に沿って第１通路１１
か貫通形成され、上端連結部１２が図示されていないカ
ップリンク等を介して回転駆動系およびＡｒ、Ｎ２．Ｈ
ｅなどの不活性ガス或いは塩素との混合ガスによってな
る浄化ガス供給源（ともに図示せず）に連結される。A first passage 11 is provided in the shaft portion 10 along the line 11 to 11.
The upper end connecting portion 12 is formed through the rotary drive system and Ar, N2, . H
It is connected to a purification gas supply source (both not shown) made of an inert gas such as e or a mixed gas with chlorine.
ロータ部２０にはその上部にシャフト部１０の下端部を
圧入嵌合する嵌合凹部２１が形成され、この嵌合凹部２
１の下側同心位置に若干小径の雌ねじ部２２を形成する
とともに、雌ねじ部２２の下側に大径の空間部２３を形
成しである。そして、外周部には等間隔を有して複数（
例えば８個）の切欠部２４が形成されており、前記空間
部２３の底壁２３ａの下面に中心近傍から放射状にのび
てそれぞれが切欠部２４に連続する複数の溝２５を形成
し、各溝２５が対応している底壁２３ａには所定の間隔
を有して複数の小孔２６を貫通形成することによって、
空間部２３と溝２５を連通させ、これにより前記シャフ
ト部１０の第１通路１１．空間部２３および小孔２６で
送気通路２を形成している。また、シャフト部１０には
その下端に雄ねじ部１３が形成されてり、この雄ねじ部
１３をロータ部２０の雌ねじ部２２に螺合することによ
って、シャフト部１０の下部にロータ部を一体的に設け
た構成になっている。A fitting recess 21 is formed in the upper part of the rotor part 20, into which the lower end of the shaft part 10 is press-fitted.
A female threaded portion 22 of a slightly smaller diameter is formed at a concentric position on the lower side of the threaded portion 1, and a space portion 23 of a larger diameter is formed below the female threaded portion 22. Then, on the outer periphery, a plurality of (
For example, eight notches 24 are formed, and a plurality of grooves 25 are formed on the lower surface of the bottom wall 23a of the space 23, extending radially from near the center and each continuous with the notch 24. By forming a plurality of small holes 26 at predetermined intervals in the bottom wall 23a to which the holes 25 correspond,
The space 23 and the groove 25 communicate with each other, thereby allowing the first passage 11 of the shaft portion 10 to communicate with each other. The air supply passage 2 is formed by the space 23 and the small hole 26. Further, the shaft portion 10 has a male threaded portion 13 formed at its lower end, and by screwing the male threaded portion 13 into the female threaded portion 22 of the rotor portion 20, the rotor portion is integrally attached to the lower portion of the shaft portion 10. It has a set configuration.
前記構成において、不純物除去用回転ノズル１は、例え
ば従来例の第５図で述べたアルミニウム溶湯処理装置に
装着され、アルミニウム溶湯に浸漬回転させるとともに
、送気通路２を通して前述の浄化ガスを吹き込んでアル
ミニウム溶湯に分散放出させる。In the above configuration, the impurity removing rotary nozzle 1 is installed in, for example, the conventional aluminum molten metal processing apparatus described in FIG. Disperse and release into molten aluminum.
即ち、浄化ガスは送気通路２の出口、つまり複数の小孔
２６から放射状の満２５に放出され、これらの溝２５と
各溝２５の外端に連続する切欠部２４とによって粉砕さ
れ、微細な浄化ガス気泡として溶湯に分散放出されて浮
上する。そして切欠部２４によって溶湯を適度に攪拌す
ることで溶湯と浄化ガス気泡を積極的に接触させ、水素
ガス、醇化物などの介在物を不純物として除去する溶湯
処理がなされる。That is, the purifying gas is discharged radially from the outlet of the air supply passage 2, that is, from the plurality of small holes 26, and is crushed by these grooves 25 and the notches 24 continuous to the outer ends of each groove 25, and becomes fine particles. The purified gas is dispersed and released into the molten metal as bubbles and floats to the surface. Then, by appropriately stirring the molten metal through the notch 24, the molten metal is brought into active contact with the purified gas bubbles, and molten metal treatment is performed in which inclusions such as hydrogen gas and molten metal are removed as impurities.
不純物除去用回転ノズルｌは耐摩耗性および耐酸化性に
すぐれており、またアルミニウム溶湯に対して不活性で
ある。したがって溶湯との摩擦による摩耗および酸化反
応による損耗が抑えられ延命化を達成できる。そのため
に不純物除去用回転ノズル１の交換頻度が大幅に低下し
、メンテナンスの省略化を図ることができるから経済的
負担も軽減するとともに、溶湯処理作業性が向上する。The rotary nozzle l for removing impurities has excellent wear resistance and oxidation resistance, and is inert to molten aluminum. Therefore, wear caused by friction with the molten metal and wear caused by oxidation reactions are suppressed, and life extension can be achieved. Therefore, the frequency of replacing the rotary nozzle 1 for removing impurities is significantly reduced, and maintenance can be omitted, which reduces the economic burden and improves molten metal processing workability.
また、従来の緻密セラミックスと比較して機械加工性に
すぐれているから、シャフト部ＩＯとロータ部２０の加
工を所望の設計条件に対応して容易に行うことができる
上、きわめて低価格である経済的な有利性をもっている
。In addition, since it has superior machinability compared to conventional dense ceramics, it is possible to easily process the shaft part IO and rotor part 20 according to desired design conditions, and it is extremely low cost. It has economic advantages.
第５図に示した処理装置に本発明に係る不純物除去用回
転ノズル１ （シャフト部の外径６０ｍｍφ）を装着し
た場合と、従来のカーボン製の不純物除去用回転ノズル
Ｂ （シャフト部の外径７０ｍｍφ）を装着した場合に
ついて、アルミニウド溶湯温度６８０−７５０°Ｃ１回
転数１８０−！３００ｒ、ｐ、＋ｎ、Ａｔガス流流量０
〜８父
た諸条件で比較テストを行った結果、カーボン製の不純
物除去用回転ノズルＢが１７時間運転で５ｍｍの摩耗を
生じたのにもかかわらず、本発明に係る不純物除去用回
転ノズル１は５０時間運転において全く摩耗を生じなか
った。A case where the rotary nozzle 1 for removing impurities according to the present invention (external diameter of the shaft portion is 60 mmφ) is attached to the processing apparatus shown in FIG. 70mmφ) is installed, the aluminum molten metal temperature is 680-750°C and the number of revolutions is 180-! 300r, p, +n, At gas flow rate 0
~ 8 As a result of a comparative test under various conditions, although the rotary nozzle B for removing impurities made of carbon suffered 5 mm of wear after 17 hours of operation, the rotary nozzle 1 for removing impurities according to the present invention No wear occurred during 50 hours of operation.
第３図は本発明に係る第２の発明の実施例を一部断面に
て示す正面図、第４図は同底面図を示す。FIG. 3 is a partially sectional front view showing a second embodiment of the present invention, and FIG. 4 is a bottom view thereof.
尚前記第１の発明と同一もしくは相当部分には同一符号
を付して説明する。Note that the same or equivalent parts as those in the first invention will be described with the same reference numerals.
前記第３図および第４図において、不純物除去用回転ノ
ズル１は前記第１の発明と同様の多孔質セラミックスに
よって形成されたシャフト部１０と、このシャフト部１
０の下部に設けられた大径円盤状のロータ部２０とから
なっている。そしてシャフト部１０には軸線に沿って第
１通路１１が貫通形成され、上端連結部１２が図示され
ていないカップリング等を介して回転駆動系および浄化
ガス供給源（ともに図示せず）に連結される。3 and 4, the rotary nozzle 1 for removing impurities includes a shaft portion 10 made of porous ceramics similar to that of the first invention, and this shaft portion 1.
The rotor section 20 has a large diameter disk shape and is provided at the lower part of the rotor section 20. A first passage 11 is formed through the shaft portion 10 along the axis, and an upper end connecting portion 12 is connected to a rotational drive system and a purification gas supply source (both not shown) via a coupling or the like (not shown). be done.
０一タ部２０にはその上部にシャフト部１０の下端部を
圧入嵌合する嵌合凹部２１が形成され、この嵌合凹部２
１の下側同心位置に若干小径の雌ねじ部２２を形成する
とともに、雌ねじ部２２の下側は下方に向けて大きく開
口しである。そして、この開口部の下端に浄化ガス放出
部３を圧入嵌着しである。A fitting recess 21 into which the lower end of the shaft part 10 is press-fitted is formed in the upper part of the 0-taper part 20.
A female threaded portion 22 of a slightly smaller diameter is formed at a concentric position on the lower side of the threaded portion 1, and the lower side of the female threaded portion 22 is largely opened downward. Then, the purified gas discharge part 3 is press-fitted into the lower end of this opening.
浄化ガス放出部３は前記シャフト部１０およびロータ部
２０よりも細孔径の大きい気孔（１０〜１００ｗｍ）を
もつ多孔質セラミックスによって形成されており、特に
中心部の肉厚を大きくして、中心部からの浄化ガス放出
を抑えている。また浄化ガス放出部３の上部に空間部２
３を形成し、シャフト部１０の第１通路１１，空間部２
３および浄化ガス放出部３の細孔径の大きい気孔で送気
通路２を形成している。そして、シャフト部１０には、
第１の発明と同様にその下端に雄ねじ部１３が形成され
ており、この雄ねじ部１３をロータ部２０の雌ねじ部２
２に螺合することによって、シャフト部ＩＯの下部にロ
ータ部２０を設けた構成になっており、ロータ部２０の
外周には複数の切欠部２４を形成しである。The purified gas discharge section 3 is made of porous ceramics having pores with a larger pore diameter (10 to 100 wm) than the shaft section 10 and the rotor section 20. This suppresses the release of purification gas from the In addition, there is a space 2 above the purified gas discharge part 3.
3, the first passage 11 of the shaft part 10, the space part 2
3 and the large-diameter pores of the purified gas discharge section 3 form an air supply passage 2. And, in the shaft part 10,
Similar to the first invention, a male threaded portion 13 is formed at the lower end, and this male threaded portion 13 is connected to the female threaded portion 2 of the rotor portion 20.
2, the rotor part 20 is provided at the lower part of the shaft part IO, and a plurality of notches 24 are formed on the outer periphery of the rotor part 20.
前記構成において、不純物除去用回転ノズル１は、前記
第１の発明と同様にアルミニウム溶湯処理装置に装着さ
れ、アルミニウム溶湯に浸漬回転させるとともに、送気
通路２を通して浄化ガスを吹き込んでアルミニウム溶湯
に分散放出させる。In the above structure, the rotary nozzle 1 for removing impurities is installed in the molten aluminum processing apparatus as in the first invention, and is immersed and rotated in the molten aluminum while blowing purification gas through the air passage 2 to disperse it in the molten aluminum. Let it be released.
即ち、浄化ガスは送気通路２の出口を構成する浄化ガス
放出部３から微細な浄化ガス気泡として分散放出されて
浮上する。そして、切欠部２４によって溶湯を適度に攪
拌することで溶湯に旋回流を与えて浄化ガス微細気泡を
この流れにまき込んで浄化ガス気泡が溶湯の液面から排
出されるまでの滞留時間をかせいで、浄化ガス気泡とア
ルミニウム溶湯な積極的に接触させ、水素ガス、酸化物
などの介在物を不純物として除去する溶湯処理がなされ
る。That is, the purified gas is dispersed and released as fine purified gas bubbles from the purified gas discharge part 3 constituting the outlet of the air supply passage 2 and floats to the surface. Then, by appropriately stirring the molten metal using the notch 24, a swirling flow is given to the molten metal, and the purified gas microbubbles are mixed into this flow, increasing the residence time until the purified gas bubbles are discharged from the surface of the molten metal. Then, a molten metal treatment is performed in which the purified gas bubbles are brought into active contact with the molten aluminum to remove inclusions such as hydrogen gas and oxides as impurities.
不純物除去用回転ノズルｌは耐摩耗性および耐醇化性に
すぐれており、またアルミニウム溶湯に対して不活性で
ある。したがって溶湯との摩擦による摩耗および酸化反
応による損耗が抑えられ延命化を達成できる。そのため
に不純物除去用回転ノズル１の交換頻度が大幅に低下し
、メンテナンスの省略化を図ることができるから経済的
負担も軽減するとともに、処理作業性が向」ニする。The rotary nozzle l for removing impurities has excellent wear resistance and anti-corrosion properties, and is inert to molten aluminum. Therefore, wear caused by friction with the molten metal and wear caused by oxidation reactions are suppressed, and life extension can be achieved. Therefore, the frequency of replacing the rotary nozzle 1 for removing impurities is significantly reduced, and maintenance can be omitted, which reduces the economic burden and improves processing efficiency.
また、シャフト部１０およびロータ部２０よりも細孔径
の大きい気孔をもった多孔質セラミツクスによって形成
された浄化ガス放出部３から、浄化ガスを微細な浄化ガ
ス気泡として分散放出させることができるので、溶湯と
浄化ガス気泡との接触状態が良好である。したかって不
純物除去用回転ノズル１を低速回転させても浄化ガスの
流量を多くする必要がないために、浄化ガス消費量を低
減できる。Further, since the purified gas can be dispersed and released as fine purified gas bubbles from the purified gas discharge part 3 formed of porous ceramics having pores with a larger pore diameter than the shaft part 10 and the rotor part 20, There is good contact between the molten metal and the purified gas bubbles. Therefore, even if the rotary nozzle 1 for removing impurities is rotated at a low speed, there is no need to increase the flow rate of the purifying gas, so that the consumption amount of the purifying gas can be reduced.
さらに、従来の縁布セラミックスと比較して機械加工性
にすぐれているから、シャツ＋−＊ａ＋Ｏとロータ部２
０の加工を所望の設計条件に対応して容易に行うことが
できる上、きわめて低価格である経済的な有利性をもっ
ている。Furthermore, since it has superior machinability compared to conventional edge cloth ceramics, the shirt +-*a+O and rotor part 2
In addition to being able to easily process 0 according to desired design conditions, it also has an economical advantage of being extremely low cost.
第５図に示した処理装置に本発明に係る不純物除去用回
転ノズル１を装着した場合と、従来のカーホン製の不純
物除去用回転ノズルＢを装着した場合について、アルミ
ニウム？３湯温度ｓａｏ〜７５００Ｃ１回転数１８０−
９０Ｏｒ、ｐ、ｍ、 Ａｒガス流流量０〜８父
較テストを行った結果、従来の不純物除去用回転ノズル
では、Ａｒガスの均一微細分散化を得るために、回転数
６０吋＋Ｐ＋ｍ、ガスがこ量８文／ｍｉｎを要したもに
もかかわらず、第２の発明に係る不純物除去用回転ノズ
ル１では回転数４０Ｏｒ，ｐ，口、ガス流量６ｆｌ ／
ｍｉｎで同等の結果を得ることができた。Regarding the case where the rotary nozzle 1 for removing impurities according to the present invention is installed in the processing apparatus shown in FIG. 3 hot water temperature sao~7500C1 rotation speed 180-
90 Or, p, m, Ar gas flow rate 0 to 8 comparison test results show that in conventional impurity removal rotary nozzles, in order to obtain uniform and fine dispersion of Ar gas, the rotation speed is 60 inches + P + m, and the gas flow rate is 0 to 8. Although this amount required 8 strokes/min, the impurity removal rotary nozzle 1 according to the second invention has a rotation speed of 40 Or, p, a gas flow rate of 6 fl/min.
Equivalent results could be obtained with min.
尚、前記各実施例では、アルミニウム溶湯の不純物除去
について説明しているが、本発明に係る第１および第２
の発明は前記実施例にのみ限定されるものではなく、ア
ルミニウム以外の溶融金属に１，Ｂ入している不純物の
除去に適用可能であることはいうまでもない。Incidentally, in each of the above embodiments, removal of impurities from molten aluminum is explained, but the first and second embodiments according to the present invention
It goes without saying that the invention is not limited to the above-mentioned embodiments, but can be applied to the removal of impurities contained in 1,B in molten metals other than aluminum.
（発明の効果）
以上説明したように、本発明に係る第１の発明によれば
、シャフト部とこのシャフト部の下部にロータ部を設け
た溶融金属の不純物除去用回転ノズルを多孔質セラミッ
クスで形成しているから、耐摩耗性および耐酸化性が向
」ニする。したがって溶融金属との摩擦によって生じる
摩耗，溶融金属との酸化反応による損耗をそれぞれ抑制
することができるので、不純物除去用回転ノズルの交換
頻度が大幅に低下する。そのためにメンテナンスの省略
化を図ることができ、経済的負担を軽減させることがで
きるとともに、処理作業性を向」ニさせる。(Effects of the Invention) As explained above, according to the first aspect of the present invention, the rotary nozzle for removing impurities from molten metal, which includes a shaft portion and a rotor portion at the lower part of the shaft portion, is made of porous ceramics. This structure improves wear resistance and oxidation resistance. Therefore, wear caused by friction with the molten metal and wear caused by oxidation reaction with the molten metal can be suppressed, so that the frequency of replacing the impurity removing rotary nozzle is significantly reduced. Therefore, maintenance can be omitted, the economic burden can be reduced, and processing efficiency can be improved.
しかも、緻密質セラミックスと比較して機械加工性にす
ぐれているから、所望の設計条件に対応して容易に加工
することができる上、きわめて低価格である経済的な有
利性をもっている。Furthermore, since it has superior machinability compared to dense ceramics, it can be easily processed to meet desired design conditions, and it is economically advantageous as it is extremely low in price.
また、本発明は係る第２の発明によれば、シャフト部と
このシャフト部の下部にロータ部を設けた溶融金属の不
純物除去用回転ノズルを多孔質セラミックスで形成する
とともに、前記ロータ部下面の浄化ガス放出部を前記シ
ャフト部およびロータ部よりも細孔径の大きい多孔質セ
ラミツクスで形成しているから、耐摩耗性および耐酸化
性が向上する。したがって溶融金属との摩擦によって生
しる摩耗，溶融金属との酸化反応による損耗をそれぞれ
抑制することができるので、不純物除去用回転ノズルの
交換頻度が大幅に低下する。そのためにメンテナンスの
省略化を図ることができ、経済的負担を軽減させること
かできるとともに、処理作業性を向上させる。Further, according to a second aspect of the present invention, a rotary nozzle for removing impurities from molten metal, which has a shaft portion and a rotor portion provided at the lower part of the shaft portion, is formed of porous ceramics, and the rotary nozzle is formed of porous ceramics. Since the purified gas discharge section is formed of porous ceramics having a larger pore diameter than the shaft section and the rotor section, wear resistance and oxidation resistance are improved. Therefore, wear caused by friction with the molten metal and wear caused by oxidation reaction with the molten metal can be suppressed, so that the frequency of replacing the impurity removing rotary nozzle is significantly reduced. Therefore, maintenance can be omitted, the economic burden can be reduced, and processing efficiency can be improved.
また、シャフト部およびロータ部よりも細孔径の大きい
気孔をもった多孔質セラミックスによって形成された浄
化ガス放出部から、浄化ガスを微細な浄化ガス気泡とし
て分散放出させることができるので、溶融金属と浄化ガ
ス気泡との接触状態が良好になる。したがって不純物除
去用回転ノズルを低速回転させても浄化ガスの流量を多
くする必要がないので浄化ガス消費量を低減できる。In addition, the purified gas can be dispersed and released in the form of fine purified gas bubbles from the purified gas release section, which is made of porous ceramics with pores larger than those of the shaft and rotor parts, so that the purified gas can be dispersed and released from the molten metal. The contact condition with the purified gas bubbles becomes better. Therefore, even if the rotary nozzle for removing impurities is rotated at a low speed, there is no need to increase the flow rate of the purification gas, so that the consumption of the purification gas can be reduced.
しかも、緻密質セラミックスと比較して、機械加工性に
すくれているから、所望の設計条件に対応して容易に加
工することかできる上、きわめて低価格である経済的な
有利性をもっている。Moreover, since it has better machinability than dense ceramics, it can be easily processed to meet desired design conditions, and it is economically advantageous at an extremely low price.
第１図は本発明に係る第１の発明の実施例を−部断面に
て示す正面図、第２図は同拡大底面図、第３図は第２の
発明の実施例を一部断面にて示す正面図、第４図は同拡
大底面図、第５図は溶融金属処理装置の概略斜視図、第
６図は従来例を一部断面にて示す正面図、第７図は同拡
大底面図である。
１・・・不純物除去用回転ノズル
２・・・送気通路
３・・・浄化ガス放出部
１０・・・シャフト部
２０・・・ロータ部
特許出願人 日木ピラーエ業株式会社
代理人 弁理士 鈴 江 孝 −
９３図
第４図
第６１ｉ１
１：
：１
Ｉ７ 図
１１：Ｕ−、−８、ｌ。FIG. 1 is a front view showing an embodiment of the first invention according to the present invention in a cross section at the - part, FIG. 2 is an enlarged bottom view of the same, and FIG. 3 is a partially sectional view of an embodiment of the second invention. 4 is an enlarged bottom view of the same, FIG. 5 is a schematic perspective view of the molten metal processing equipment, FIG. 6 is a front view showing a conventional example partially in section, and FIG. 7 is an enlarged bottom view of the same. It is a diagram. 1... Rotating nozzle for removing impurities 2... Air supply passage 3... Purified gas discharge section 10... Shaft section 20... Rotor section Patent applicant Suzu, agent of Hiki Pillae Gyo Co., Ltd., patent attorney Jiang Xiao - Figure 93 Figure 4 Figure 61i1 1: :1 I7 Figure 11: U-, -8, l.
Claims (2)
たロータ部を備え、溶融金属に浸漬回転させて溶融金属
を攪拌するとともに、前記シャフト部とロータ部に形成
した送気通路を通して浄化ガスを吹き込んで溶融金属に
分散放出させる溶融金属の不純物除去用回転ノズルにお
いて、前記シャフト部およびロータ部が多孔質セラミッ
クスで形成されていることを特徴とする溶融金属の不純
物除去用回転ノズル。(1) It is equipped with a shaft part and a rotor part provided at the lower part of this shaft part, and is immersed in molten metal and rotated to stir the molten metal, and the purified gas is passed through the air supply passage formed in the shaft part and the rotor part. A rotary nozzle for removing impurities from molten metal that blows and disperses impurities into the molten metal, wherein the shaft portion and the rotor portion are formed of porous ceramics.
ロータ部を備え、溶融金属に浸漬回転させて溶融金属を
攪拌するとともに、前記シャフト部とロータ部に形成し
た送気通路を通して浄化ガスを吹き込んで溶融金属に分
散放出させる溶融金属の不純物除去用回転ノズルにおい
て、前記シャフト部およびロータ部が多孔質セラミック
スで形成されかつ前記ロータ部下面の浄化ガス放出部を
前記シャフト部およびロータ部よりも細孔径の大きい多
孔質セラミックスで形成したことを特徴とする溶融金属
の不純物除去用回転ノズル。(2) It is equipped with a shaft part and a rotor part provided at the lower part of this shaft part, and is immersed in molten metal and rotated to stir the molten metal, and at the same time, purifying gas is supplied through the air supply passage formed in the shaft part and the rotor part. In a rotary nozzle for removing impurities from molten metal that is dispersed and discharged into the molten metal by blowing into the molten metal, the shaft portion and the rotor portion are formed of porous ceramics, and the purifying gas discharge portion on the lower surface of the rotor is arranged so as to be lower than the shaft portion and the rotor portion. A rotary nozzle for removing impurities from molten metal, characterized by being made of porous ceramics with large pore diameters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8757488A JPH0233780B2 (en) | 1988-04-08 | 1988-04-08 | YOJUKINZOKUNOFUJUNBUTSUJOKYOYOKAITENNOZURU |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8757488A JPH0233780B2 (en) | 1988-04-08 | 1988-04-08 | YOJUKINZOKUNOFUJUNBUTSUJOKYOYOKAITENNOZURU |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01259135A true JPH01259135A (en) | 1989-10-16 |
| JPH0233780B2 JPH0233780B2 (en) | 1990-07-30 |
Family
ID=13918773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8757488A Expired - Lifetime JPH0233780B2 (en) | 1988-04-08 | 1988-04-08 | YOJUKINZOKUNOFUJUNBUTSUJOKYOYOKAITENNOZURU |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0233780B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0391161U (en) * | 1989-12-29 | 1991-09-17 | ||
| WO1999034024A1 (en) * | 1997-12-24 | 1999-07-08 | Alcan International Limited | Injector for gas treatment of molten metals |
| DE10301561A1 (en) * | 2002-09-19 | 2004-05-27 | Hoesch Metallurgie Gmbh | Rotor, device and method for introducing fluids into a molten metal |
| WO2007138793A1 (en) * | 2006-05-29 | 2007-12-06 | Nippon Crucible Co., Ltd. | Lance pipe, degasification equipment, container with degasification equipment and watershoot with degasification equipment |
| US7669739B2 (en) | 2002-12-21 | 2010-03-02 | Foseco International Limited | Rotary stirring device for treating molten metal |
| JP2012223810A (en) * | 2011-04-22 | 2012-11-15 | Mitsui Mining & Smelting Co Ltd | Molten metal filtration device |
-
1988
- 1988-04-08 JP JP8757488A patent/JPH0233780B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0391161U (en) * | 1989-12-29 | 1991-09-17 | ||
| WO1999034024A1 (en) * | 1997-12-24 | 1999-07-08 | Alcan International Limited | Injector for gas treatment of molten metals |
| DE10301561A1 (en) * | 2002-09-19 | 2004-05-27 | Hoesch Metallurgie Gmbh | Rotor, device and method for introducing fluids into a molten metal |
| US7669739B2 (en) | 2002-12-21 | 2010-03-02 | Foseco International Limited | Rotary stirring device for treating molten metal |
| WO2007138793A1 (en) * | 2006-05-29 | 2007-12-06 | Nippon Crucible Co., Ltd. | Lance pipe, degasification equipment, container with degasification equipment and watershoot with degasification equipment |
| JP2008007848A (en) * | 2006-05-29 | 2008-01-17 | Nippon Crucible Co Ltd | Lance pipe, degasification equipment, container with degasification equipment and trough with degasification equipment |
| JP2012223810A (en) * | 2011-04-22 | 2012-11-15 | Mitsui Mining & Smelting Co Ltd | Molten metal filtration device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0233780B2 (en) | 1990-07-30 |
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