JP2583492B2 - Gas injection tube for molten aluminum - Google Patents
Gas injection tube for molten aluminumInfo
- Publication number
- JP2583492B2 JP2583492B2 JP61230044A JP23004486A JP2583492B2 JP 2583492 B2 JP2583492 B2 JP 2583492B2 JP 61230044 A JP61230044 A JP 61230044A JP 23004486 A JP23004486 A JP 23004486A JP 2583492 B2 JP2583492 B2 JP 2583492B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- gas injection
- molten aluminum
- injection pipe
- sialon
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Furnace Charging Or Discharging (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、アルミニウム溶解炉に用いられる脱ガスの
ためのアルミニウム溶湯用ガス吹込管に関するものであ
る。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas injection pipe for molten aluminum for degassing used in an aluminum melting furnace.
従来の技術 アルミニウム溶解炉において、ガス吹込管によりArガ
スを溶湯中に吹込んで発泡させて脱ガスが行なわれてい
る。2. Description of the Related Art In an aluminum melting furnace, degassing is performed by blowing Ar gas into a molten metal through a gas injection pipe to foam the molten metal.
このガス吹込管は鉄又は鋳鉄単独、あるいはこれらを
芯金としてその外表面に耐火材を被覆したものが用いら
れている。そして、これらのガス吹込管は１本のパイプ
でできたものやその先端部が複数本に枝分れしたもの等
がある。The gas injection pipe is made of iron or cast iron alone, or a core metal having an outer surface coated with a refractory material. These gas injection pipes include a pipe made of a single pipe and a pipe whose tip end is branched into a plurality of pipes.
しかしながら、上述のような鉄又は鋳鉄製ガス吹込管
は、溶湯により侵蝕され、溶湯中への鉄等の溶出があ
り、これが製品中へ不純物として混入し、材質に悪影響
を及ぼす。ガス吹込管の表面に、溶湯による侵蝕を防ぐ
ために、耐火材を被覆したものも用いられているが、使
用により剥離したりするので手直しする必要があり、メ
インテナンスの工数が必要である。また、被覆により容
積と重要が必要以上に大きくなって取扱いに不便があ
る。However, the gas injection pipe made of iron or cast iron as described above is eroded by the molten metal, and iron or the like is eluted into the molten metal, which is mixed into the product as an impurity and adversely affects the material. In order to prevent the erosion by the molten metal, the surface of the gas injection pipe is coated with a refractory material. However, since it is peeled off by use, it needs to be reworked, and the number of maintenance steps is required. In addition, the coating makes the volume and importance larger than necessary, which is inconvenient to handle.
また、軸心方向の中空部が処理ガス通路とされた黒鉛
パイプの先端にポーラスプラグが装着されたアルミニウ
ム溶湯用の撹拌棒が、特開昭58−1025号として、窒化珪
素管の内面及び外面のいずれか一方を水ガラスで被覆し
たガス吹込管が実開昭58−163555号として開示されてい
る。Further, a stirring rod for molten aluminum in which a porous plug is mounted at the tip of a graphite pipe having a hollow portion in the axial direction as a processing gas passage is disclosed in Japanese Patent Application Laid-Open No. 58-1025, as the inner and outer surfaces of a silicon nitride tube. Is disclosed in Japanese Utility Model Laid-Open No. 58-163555.
しかし、上記のものは、強度が不十分であったり、耐
酸化性が十分ではないので、表面に付着物が溜まり易
く、浸蝕される虞があり、このため、手入れを頻繁に行
わなければならないばかりか、寿命も短いものである。However, the above-mentioned ones have insufficient strength or insufficient oxidation resistance, so that deposits are likely to accumulate on the surface and may be eroded. For this reason, frequent care must be taken. Not only that, the life is short.
発明が解決しようとする問題点 本発明は上述のような実状に対応するため検討を重ね
て創作されたもので、その目的とするところは、吹込ま
れたArガスが吹込管の先端で微細な泡が発泡するように
して脱ガスの効率を向上させ、さらに、アルミニウム溶
湯に対する耐食性および強度を持たせ、表面をなめらか
にしてアルミニウム溶湯の付着を防止し、なおかつ、被
覆耐火材などの手入れ工数をなくすると共に小型軽量化
により取扱いやすくしたアルミニウム溶湯用ガス吹込管
を提供することである。Problems to be Solved by the Invention The present invention was created by repeatedly studying in order to cope with the above-mentioned actual situation, and the purpose is that the injected Ar gas is fine at the tip of the blowing pipe. Improve the efficiency of degassing by foaming foam, furthermore, provide corrosion resistance and strength to molten aluminum, smooth the surface to prevent the adhesion of molten aluminum, and reduce the number of man-hours for maintenance such as coated refractory material. An object of the present invention is to provide a gas injection pipe for molten aluminum which is easy to handle by eliminating the size and weight.
問題点を解決するための手段 上記問題点を解決するために、本発明のアルミニウム
溶湯用ガス吹込管は、先端部にポーラスな充填材を装着
した吹出口を有し、各部を構成する部品が、曲げ強度が
50kg/mm2以上で、密度が理論密度の95％以上で、水中投
下法による熱衝撃温度が△Ｔ＝400℃以上のサイアロン
から成り、前記サイアロンは、α相を75重量％以上含む
Si3N470重量％以上と、周期律表III a族元素の酸化物の
なかの１種以上10重量％以下と、Al2O310重量％以下
と、AlN固溶体（AlN−Si3N4・Al2O3系）もしくはAlN10
重量％以下とからなる混合物を焼結したものである。Means for Solving the Problems In order to solve the above problems, the gas injection pipe for molten aluminum of the present invention has a blowout port with a porous filler mounted at the tip, and the components constituting each part are , Bending strength
50 kg / mm 2 or more, the density is 95% or more of the theoretical density, and the thermal shock temperature by underwater drop method is made of sialon with ΔT = 400 ° C or more, and the sialon contains 75% by weight or more of α phase.
70% by weight or more of Si 3 N 4 , one or more kinds of oxides of Group IIIa elements in the periodic table III and 10% by weight or less, 10% by weight or less of Al 2 O 3, and an AlN solid solution (AlN—Si 3 N 4. Al 2 O 3 ) or AlN10
It is a mixture obtained by sintering a mixture consisting of less than 10% by weight.
また、サイアロンは、α相を75重量％以上含むSi3N48
0重量％以上と、周期律表III a族元素の酸化物のなかの
１種以上10重量％以下と、Al2O310重量％以下とからな
る混合物を焼結したものでもよい。In addition, Sialon is composed of Si 3 N 4 8 containing at least 75% by weight of α phase.
It may be a sintered product of a mixture of 0% by weight or more, one or more kinds of oxides of Group IIIa elements of the periodic table and 10% by weight or less, and Al 2 O 3 10% by weight or less.
作 用 吹込棒より吹込んだArガスは、吹出口の先端部にポー
ラス耐火材が装着されているので、耐火材の微小な空隙
間を通って溶通中に発泡し、泡を微細化することができ
る。The porous gas refractory material is attached to the tip of the air outlet, so the Ar gas blown from the blow rod foams through the small gaps in the refractory material during fusion and refines the bubbles. be able to.
また、アルミニウム溶湯用ガス吹込管を構成する各部
品の材質を、耐酸化性に富んだサイアロンにすることに
より、その表面のSiO2とアルミニウム溶融に浮遊するフ
ラックス成分との反応が抑制されて、付着物が形成され
にくく、侵蝕されにくい。In addition, by making the material of each component constituting the gas injection tube for molten aluminum into a sialon having high oxidation resistance, the reaction between the SiO 2 on the surface thereof and the flux component floating in the aluminum melt is suppressed, It is difficult for deposits to be formed and eroded.
さらに、高強度を有しているので、ガス吹込みにより
撹拌される溶湯から受ける曲げに対しても耐え、取扱中
に、衝撃荷重を受けても破損することがない。また、高
密度化により表面がなめらかになっているので、溶湯の
付着を防止することができる。Furthermore, since it has high strength, it can withstand bending received from a molten metal stirred by gas injection, and does not break even if it receives an impact load during handling. Further, since the surface is smoothed by the high density, the adhesion of the molten metal can be prevented.
実施例 以下、本発明の実施例を図面に基づいて説明する。Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
第１図（ａ）は本発明の実施例に係るアルミニウム溶
湯用ガス吹込管の正面図、（ｂ）は下面図、第２図は第
１図の縦断面図である。FIG. 1 (a) is a front view of a gas injection pipe for molten aluminum according to an embodiment of the present invention, FIG. 1 (b) is a bottom view, and FIG. 2 is a longitudinal sectional view of FIG.
第１図（ａ）および（ｂ），第２図に示すように、ア
ルミニウム溶湯用のガス吹込管１は吹込棒2,継手3,分配
棒4,吹出口５より構成されている。継手３にはねじ孔7,
8が連通して設けられており、それぞれ分配棒４と吹込
棒２を螺嵌する。As shown in FIGS. 1 (a) and 1 (b) and FIG. 2, the gas injection pipe 1 for molten aluminum is composed of an injection rod 2, a joint 3, a distribution rod 4, and an outlet 5. The joint 3 has a screw hole 7,
8 are provided in communication with each other, and the distribution rod 4 and the blowing rod 2 are screw-fitted respectively.
分配棒４の他端には中空パイプ状の吹出口５を螺嵌
し、吹出口５の先端空間部に充填材６としてポーラス耐
火材を装着する。A hollow pipe-shaped outlet 5 is screwed into the other end of the distribution rod 4, and a porous refractory material is mounted as a filler 6 in a tip end space of the outlet 5.
吹込棒２よりArガスを吹込むと、継手3,分配棒４を通
って吹出口５よりArガスは４方向に分れて流出し、吹出
口５には充填材６としてポーラス耐火材が装着されてい
るので、微小な空隙間を通って溶湯中に発泡した泡は微
細化され、脱ガスの効率が向上する。When Ar gas is blown from the blow rod 2, the Ar gas passes through the joint 3 and the distribution rod 4 and flows out of the blowout port 5 in four directions, and the blowout port 5 is provided with a porous refractory material as a filler 6. As a result, the bubbles foamed into the molten metal through the minute voids are miniaturized, and the degassing efficiency is improved.
ガス吹込管１を構成する各部品の材質として、サイア
ロンを用い、その曲げ強度は60kg/mm2、密度は理論密度
の98％、水中投入法による熱衝撃温度は△Ｔ＝500℃以
上である。また、このサイアロンは、α相を85重量％以
上含むSi3N480重量％以上と、周期律表III a族元素の酸
化物のなかの１種以上７重量％以下と、Al2O37重量％以
下と、AlN固溶体（AlN−Si3N4・Al2O3系）もしくはAlN6
重量％以下とからなる混合物を焼結したものである。Sialon is used as a material of each part constituting the gas injection pipe 1, its bending strength is 60 kg / mm 2 , its density is 98% of the theoretical density, and its thermal shock temperature by underwater injection method is ΔT = 500 ° C. or more. . Further, the sialon, and Si 3 N 4 80% by weight or more, including the α phase 85% by weight or more, with one or more 7 wt% or less among the oxides of the Periodic Table III a group element, Al 2 O 3 7 wt% or less and, AlN solid solution (AlN-Si 3 N 4 · Al 2 O 3 system) or AlN6
It is a mixture obtained by sintering a mixture consisting of less than 10% by weight.
上記材質のガス吹込管１をアルミニウム溶解炉に用い
た結果、微細な泡が得られ、脱ガスの効率が向上し、さ
らに、溶湯による侵蝕は殆んど見られず、使用中の衝撃
荷重や熱衝撃にも充分耐えた。As a result of using the gas injection pipe 1 of the above-mentioned material in an aluminum melting furnace, fine bubbles are obtained, the efficiency of degassing is improved, furthermore, almost no erosion by the molten metal is observed, Withstands enough thermal shock.
また、取り扱いが容易であると共に寿命も従来の鋳鉄
製ガス吹込管に比べ大幅に延び、手入れなしで１年以上
の長寿命となり、使用中の事故がない限り、ほぼ半永久
的に使用できることがわかった。In addition, it is easy to handle and the service life is much longer than that of conventional cast iron gas injection pipes. The service life is longer than one year without care, and it can be used almost semi-permanently unless there is an accident during use. Was.
ガス吹込管１を構成する各部品の材質は本実施例のみ
に限定されるものではない。他のサイアロン、例えばα
相を75重量％以上含むSi3N4を80重量％以上と、周期律
表III a族元素の酸化物のなかの１種以上10重量％以下
と、Al2O310重量％以下とからなる混合物を焼結したも
のでもよい。The material of each component constituting the gas injection pipe 1 is not limited to the present embodiment. Other sialons, for example α
80% by weight or more of Si 3 N 4 containing 75% by weight or more of a phase, at least 10% by weight or less of one or more oxides of Group IIIa elements in the periodic table, and 10% by weight or less of Al 2 O 3 May be sintered.
発明の効果 以上説明したように、本発明によれば、吹込棒より吹
込んだArガスはアルミニウム溶湯中に微細化して発泡す
るので、脱ガスの効率が向上する。Effect of the Invention As described above, according to the present invention, the Ar gas blown from the blowing rod is refined and foamed in the molten aluminum, so that the degassing efficiency is improved.
さらに、本発明はアルミニウム溶湯用ガス吹込管を構
成する各部分の材質を、高強度を有すると共に、耐酸化
性に富んだサイアロンにすることにより、サイアロン表
面のSiO2とアルミニウム溶融に浮遊するフラックス成分
のNa2O,K2O等との反応が抑制されるので、ガス吹込管の
表面に付着物が形成されたり、表面が浸蝕されるのを抑
えることができ、しかし、物理的な損傷も受けにくく、
このため、ガス吹込管の寿命を大幅に向上し得るのみな
らず、使用中の手入れの必要をなくす。Further, the material of each part present invention constituting the gas blowing tubes for molten aluminum, which has a high strength, by the sialon rich in oxidation resistance, flux suspended in SiO 2 and aluminum melting sialon surface Since the reaction with the components Na 2 O, K 2 O, etc. is suppressed, it is possible to suppress the formation of deposits on the surface of the gas injection pipe and the erosion of the surface, but to prevent physical damage. Hard to receive,
For this reason, not only can the life of the gas injection tube be significantly improved, but also the need for maintenance during use is eliminated.
また、小型軽量のため取り扱いが容易であり、製品へ
の不純物の混入を避けることにより悪影響を排除し、製
品を安定かつ良好に製造し得るなどの効果を有するもの
であって、工業的にその価値は高い。In addition, it is easy to handle due to its small size and light weight, and has the effect of eliminating adverse effects by avoiding the entry of impurities into the product, and has the effect of enabling the product to be manufactured stably and satisfactorily. The value is high.
第１図（ａ）は本発明の実施例に係るガス吹込管の正面
図、（ｂ）は下面図、第２図は第１図の縦断面図であ
る。 １……アルミニウム溶湯用のガス吹込管、２……吹込
棒、５……吹出口、６……充填材1A is a front view of a gas injection pipe according to an embodiment of the present invention, FIG. 1B is a bottom view, and FIG. 2 is a longitudinal sectional view of FIG. 1. Gas blow pipe for molten aluminum 2. Blow rod 5, Blow outlet 6, Filler
Claims (2)
先端部にポーラスな充填材を装着した吹出口を有し、各
部を構成する部品が、曲げ強度が50kg/mm2以上で、密度
が理論密度の95％以上で、水中投下法による熱衝撃温度
が△Ｔ＝400℃以上のサイアロンから成り、前記サイア
ロンは、α相を75重量％以上含むSi3N470重量％以上
と、周期律表III a族元素の酸化物のなかの１種以上10
重量％以下と、Al2O310重量％以下と、AlN固溶体（AlN
−Si3N4・Al2O3系）もしくはAlN10重量％以下とからな
る混合物を焼結したものであることを特徴とするアルミ
ニウム溶湯用ガス吹込管。1. A gas injection pipe for molten aluminum,
Has air outlet fitted with porous filler tip, parts constituting each unit is, in bending strength 50 kg / mm 2 or more, a density of 95% or more of the theoretical density, thermal shock temperature by water dropping method Is composed of a sialon having a temperature of ΔT = 400 ° C. or higher, and the sialon includes at least 70% by weight of Si 3 N 4 containing at least 75% by weight of an α phase, and at least one of oxides of Group IIIa elements in the periodic table. Ten
Wt% and less, and Al 2 O 3 10 wt% or less, AlN solid solution (AlN
A gas injection pipe for molten aluminum, which is obtained by sintering a mixture of (Si 3 N 4 .Al 2 O 3 ) or AlN 10% by weight or less.
先端部にポーラスな充填材を装着した吹出口を有し、各
部を構成する部品が、曲げ強度が50kg/mm2以上で、密度
が理論密度の95％以上で、水中投下法による熱衝撃温度
が△Ｔ＝400℃以上のサイアロンから成り、前記サイア
ロンは、α相を75重量％以上含むSi3N480重量％以上
と、周期律表III a族元素の酸化物のなかの１種以上10
重量％以下と、Al2O310重量％以下とからなる混合物を
焼結したものであることを特徴とするアルミニウム溶湯
用ガス吹込管。2. A gas injection pipe for molten aluminum,
It has an air outlet with a porous filler at the tip, and the components that make up each part have a flexural strength of 50 kg / mm 2 or more, a density of 95% or more of the theoretical density, and a thermal shock temperature by the water drop method. Is composed of a sialon having a temperature of △ T = 400 ° C. or more, wherein the sialon includes at least 80% by weight of Si 3 N 4 containing at least 75% by weight of an α phase and at least one of oxides of Group IIIa elements in the periodic table. Ten
A gas injection pipe for molten aluminum, which is obtained by sintering a mixture of not more than 10% by weight of Al 2 O 3 and not more than 10% by weight of Al 2 O 3 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61230044A JP2583492B2 (en) | 1986-09-30 | 1986-09-30 | Gas injection tube for molten aluminum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61230044A JP2583492B2 (en) | 1986-09-30 | 1986-09-30 | Gas injection tube for molten aluminum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6386825A JPS6386825A (en) | 1988-04-18 |
| JP2583492B2 true JP2583492B2 (en) | 1997-02-19 |
Family
ID=16901681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61230044A Expired - Lifetime JP2583492B2 (en) | 1986-09-30 | 1986-09-30 | Gas injection tube for molten aluminum |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2583492B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102459664A (en) * | 2009-06-08 | 2012-05-16 | 三井金属矿业株式会社 | Lance pipe |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2571364Y2 (en) * | 1991-12-16 | 1998-05-18 | 日本重化学工業株式会社 | Gas injector for metal degassing equipment |
| JP2008200739A (en) * | 2007-02-22 | 2008-09-04 | Japan Metals & Chem Co Ltd | Rotary member for molten metal degassing apparatus, and molten metal degassing apparatus comprising the same |
| CN109182654A (en) * | 2018-10-22 | 2019-01-11 | 王子晨 | A kind of self-action Air blowing stick for liquid bottom blow |
| CN109182655A (en) * | 2018-10-23 | 2019-01-11 | 王子晨 | A kind of Air blowing stick for the low blow of liquid |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS581025A (en) * | 1981-05-27 | 1983-01-06 | Sumitomo Light Metal Ind Ltd | Treating device of molten metal |
| JPS58163555U (en) * | 1982-04-27 | 1983-10-31 | 住友金属鉱山株式会社 | Chlorine gas blowing pipe for molten metal refining |
-
1986
- 1986-09-30 JP JP61230044A patent/JP2583492B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102459664A (en) * | 2009-06-08 | 2012-05-16 | 三井金属矿业株式会社 | Lance pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6386825A (en) | 1988-04-18 |
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