JP3346010B2 - Method for producing Al or Al alloy - Google Patents
Method for producing Al or Al alloyInfo
- Publication number
- JP3346010B2 JP3346010B2 JP00326794A JP326794A JP3346010B2 JP 3346010 B2 JP3346010 B2 JP 3346010B2 JP 00326794 A JP00326794 A JP 00326794A JP 326794 A JP326794 A JP 326794A JP 3346010 B2 JP3346010 B2 JP 3346010B2
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- composite oxide
- present
- impurity
- based composite
- 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 - Fee Related
Links
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【産業上の利用分野】本発明は、ＡｌまたはＡｌ合金を
製造する方法に関し、詳細にはＡｌまたはＡｌ合金溶湯
から不純物であるＰｂを除去する方法に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing Al or an Al alloy, and more particularly to a method for removing Pb as an impurity from a molten Al or Al alloy.
【０００２】[0002]
【従来の技術】ＡｌまたはＡｌ合金は、軽量性、加工
性、表面美麗性等の特徴を有することから種々の用途に
利用されている。しかし、不純物元素の混入によって、
共晶化合物が粗大化する等の不都合が生じ、強度、靭
性、表面処理性等が著しく劣るという問題がある。近
年、省資源・省エネルギーの観点から、ＡｌまたはＡｌ
合金製品のリサイクルが必要とされているが、不純物元
素を極力低減しなければリサイクルによって得られるＡ
ｌまたはＡｌ合金が使用に耐えないものとなってしま
う。2. Description of the Related Art Al or an Al alloy is used for various purposes because it has characteristics such as light weight, workability, and surface aesthetics. However, due to the inclusion of impurity elements,
Problems such as coarsening of the eutectic compound occur and there is a problem that strength, toughness, surface treatment properties, etc. are remarkably inferior. In recent years, from the viewpoint of resource saving and energy saving, Al or Al
It is necessary to recycle alloy products, but if impurity elements are not reduced as much as possible, A
The l or Al alloy becomes unusable.
【０００３】不純物のなかでもＰｂについては、特開平
５−１７８５６号に、純Ａｌ板材を所定温度に加熱保持
しＰｂを板表面に拡散移動させ、この表面部を除去する
方法が提案されているが、根本的な不純物除去方法とは
言えず、また溶湯における偏析法によってもＰｂの除去
は可能であるが効率が悪く工業的ではない。Regarding Pb among impurities, Japanese Patent Laid-Open No. Hei 5-17856 proposes a method in which a pure Al plate material is heated and held at a predetermined temperature to diffuse and move Pb to the plate surface to remove this surface portion. However, it cannot be said that this is a fundamental method for removing impurities, and Pb can be removed by a segregation method in a molten metal, but the efficiency is poor and the method is not industrial.
【０００４】この様にＡｌまたはＡｌ合金中のＰｂ不純
物を、安価でかつ生産性良好に除去し得る方法はまだ得
られていないのが現状である。[0004] As described above, a method capable of removing Pb impurities in Al or an Al alloy at low cost and with good productivity has not yet been obtained.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、上記従来技
術の問題を解決し、ＡｌまたはＡｌ合金溶湯中からＰｂ
不純物を安価でしかも生産性良好に除去し得る方法を提
供し、高純度なＡｌまたはＡｌ合金を製造することを目
的とする。SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art and solves the above problem by removing Pb from molten Al or Al alloy.
An object of the present invention is to provide a method capable of removing impurities at low cost and with good productivity, and to produce high-purity Al or Al alloy.
【０００６】[0006]
【課題を解決するための手段】本発明のＡｌまたはＡｌ
合金の製造方法は、不純物としてＰｂを含むＡｌまたは
Ａｌ合金溶湯中に、ＳｉＯ2 および／またはＳｉ系複合
酸化物を添加し、不純物Ｐｂとの間にＳｉ−Ｐｂ−Ｏ系
複合酸化物を形成させてこれを分離する工程を含むとこ
ろに要旨を有する。また、該複合酸化物の形成されたＡ
ｌまたはＡｌ合金溶湯中に、不活性ガスを吹込み溶湯中
の該複合酸化物の浮上分離を促進する方法や、該複合酸
化物を耐火性フィルターを介して除去する方法も好まし
く採用できる。According to the present invention, Al or Al is used.
The alloy is manufactured by adding SiO 2 and / or a Si-based composite oxide to Al or an Al alloy melt containing Pb as an impurity to form a Si—Pb—O-based composite oxide with the impurity Pb. The gist lies in that the method includes a step of separating it. In addition, the composite oxide formed A
A method of injecting an inert gas into the 1 or Al alloy melt to promote the floating separation of the composite oxide in the melt or a method of removing the composite oxide through a refractory filter can also be preferably employed.
【０００７】[0007]
【作用】ＡｌまたはＡｌ合金は極めて酸化し易く、かつ
その酸化傾向はＰｂより大きい。従って、ＡｌまたはＡ
ｌ合金溶湯からＰｂを酸化物として除去することは不可
能であることが知られている。しかし、本発明者らが鋭
意検討した結果、ＳｉとＰｂとの複合酸化物は、メタル
ロスを起こすことなくＡｌまたはＡｌ合金溶湯中に晶析
もしくは半溶融状態で存在し、ろ過によって分離除去し
得ることを見出し本発明に到達した。これは、Ｓｉ−Ｐ
ｂ−Ｏ系複合酸化物が、Ａｌの酸化物であるＡｌ2 Ｏ3
よりも生成自由エネルギーが低いためであると考えられ
る。このことから本発明では、ＡｌまたはＡｌ合金溶湯
中にＳｉと酸素源を存在させ、Ｐｂとの複合酸化物を形
成させてこれを除去することとしたのである。The Al or Al alloy is very easily oxidized, and its tendency to oxidize is higher than that of Pb. Therefore, Al or A
It is known that it is impossible to remove Pb as an oxide from a 1 alloy melt. However, as a result of diligent studies by the present inventors, the composite oxide of Si and Pb exists in a crystallized or semi-molten state in Al or Al alloy melt without causing metal loss, and can be separated and removed by filtration. The inventors have found that the present invention has been achieved. This is Si-P
The b-O-based composite oxide is Al 2 O 3 which is an oxide of Al.
This is considered to be because the free energy of formation is lower than that. Accordingly, in the present invention, Si and an oxygen source are present in the Al or Al alloy melt to form a composite oxide of Pb and remove it.
【０００８】本発明では、ＡｌまたはＡｌ合金溶湯中
に、ＳｉＯ2 および／またはＳｉ系複合酸化物を添加す
るが、用いることのできるＳｉ系複合酸化物としては、
ＭｇＳｉＯ3 、ＣａＳｉＯ3 、ＦｅＳｉＯ3 、ＭｎＳｉ
Ｏ3 、ＺｎＳｉＯ3 等が挙げられる。ＳｉＯ2 および／
またはＳｉ系複合酸化物の添加量は、溶湯中に混入して
いる不純物Ｐｂの量に応じて増減させる必要がある。こ
れらの化合物中のＳｉ総量の下限値は、Ｓｉ−Ｐｂ−Ｏ
系複合酸化物を形成し得る化学量論的当量である。当量
より少ないと、不純物Ｐｂの全てを複合酸化物として除
去できないためである。例えば、ＳｉＯ2 のみを添加し
て、（ＰｂＯ）（ＳｉＯ2 ）3 を形成させる場合、Ｐｂ
１モルに対しＳｉは３モル（化学量論的当量）必要であ
り、重量比としてはＳｉ：Ｐｂ＝８４．３（ＳｉＯ2 と
しては１８０．３）：２０７となる。従ってＰｂが１重
量％含まれる溶湯には、ＳｉＯ2 を０．４１重量％以上
添加すれば良いことになる。ただし、複合酸化物形成の
ための反応の場が少ないことを考慮すれば、当量の１．
５倍以上のＳｉを存在させることが好ましい。In the present invention, SiO 2 and / or Si-based composite oxide is added to the Al or Al alloy melt.
MgSiO 3 , CaSiO 3 , FeSiO 3 , MnSi
O 3 and ZnSiO 3 are exemplified. SiO 2 and / or
Alternatively, the addition amount of the Si-based composite oxide needs to be increased or decreased according to the amount of the impurity Pb mixed in the molten metal. The lower limit of the total amount of Si in these compounds is Si-Pb-O
It is a stoichiometric equivalent capable of forming a system composite oxide. If the amount is less than the equivalent, all of the impurities Pb cannot be removed as a composite oxide. For example, when (PbO) (SiO 2 ) 3 is formed by adding only SiO 2 , Pb
3 mol (stoichiometric equivalent) of Si is necessary for 1 mol, and the weight ratio is Si: Pb = 84.3 (180.3 for SiO 2 ): 207. Therefore, 0.41% by weight or more of SiO 2 should be added to the molten metal containing 1% by weight of Pb. However, considering that the reaction field for forming the complex oxide is small, the equivalent of 1.
It is preferable to have five times or more Si.
【０００９】一方、Ｓｉは溶湯中のＰｂ量より過剰に多
く存在させると、却って溶湯汚染の原因となり、得られ
るＡｌまたはＡｌ合金の性能低下につながりかねない。
従って、Ｓｉの上限値は、複合酸化物を形成し得る化学
量論的当量の３倍程度とすることが好ましい。より好ま
しくは当量の２倍以下である。また、必要に応じて空気
吹込みを行ってもよく、余剰酸素によってＡｌ2 Ｏ3 が
形成されるのを極力防ぐ様に吹込み量を調整する。On the other hand, if Si is excessively present in excess of the amount of Pb in the molten metal, it may cause the contamination of the molten metal and lead to a reduction in the performance of the obtained Al or Al alloy.
Therefore, the upper limit of Si is preferably about three times the stoichiometric equivalent capable of forming a composite oxide. It is more preferably twice or less the equivalent. Further, air blowing may be performed as necessary, and the blowing amount is adjusted so as to minimize formation of Al 2 O 3 due to excess oxygen.
【００１０】本発明では、Ｐｂの複合酸化物が形成した
ＡｌまたはＡｌ合金溶湯中から、これらの複合酸化物を
分離することによって、不純物Ｐｂの除去が達成でき
る。複合酸化物の除去方法は特に限定されない。「溶湯
鎮静」として溶湯を静置して複合酸化物を浮上・もしく
は沈降させた後、除滓するか、耐火性の多孔体フィルタ
ーで溶湯濾過する等の方法で除去することが好ましい。
また複合酸化物は溶湯中に浮遊しているものも多いた
め、窒素、アルゴン、Ｈｅ、ネオン等の不活性ガスを微
細な気泡状に溶湯中に吹込み、気泡の浮上と共に複合酸
化物を浮上させて除滓する等の分離方法も好ましく採用
できる。この場合は脱水素も同時に達成することができ
る。In the present invention, the removal of impurities Pb can be achieved by separating these complex oxides from the molten Al or Al alloy formed by the complex oxides of Pb. The method for removing the composite oxide is not particularly limited. It is preferable that the molten metal is allowed to stand and the composite oxide is floated or settled as “melting of the molten metal” and then removed by a method of removing slag or filtering the molten metal with a refractory porous filter.
In addition, since many of the composite oxides are floating in the molten metal, an inert gas such as nitrogen, argon, He, or neon is blown into the molten metal in the form of fine bubbles to float the composite oxides together with the floating of the bubbles. Separation methods such as removal of the slag can also be preferably employed. In this case, dehydrogenation can be achieved at the same time.
【００１１】本発明におけるＡｌまたはＡｌ合金の溶解
温度としては、通常の７００〜９００℃でよく、複合酸
化物を形成させて濾過した後は、公知の方法で精錬を行
うことによって、高純度なＡｌまたはＡｌ合金を製造す
ることができる。[0011] The melting temperature of Al or Al alloy in the present invention may be usually 700 to 900 ° C, and after forming and filtering a complex oxide, high-purity can be obtained by refining by a known method. Al or Al alloy can be manufactured.
【００１２】[0012]
【実施例】以下実施例によって本発明をさらに詳述する
が、下記実施例は本発明を制限するものではなく、前・
後記の趣旨を逸脱しない範囲で変更実施することは全て
本発明の技術範囲に包含される。EXAMPLES The present invention will be described in more detail with reference to the following Examples, which do not limit the present invention.
Modifications and alterations that do not depart from the spirit described below are all included in the technical scope of the present invention.
【００１３】原料として、Ｐｂ１．０重量％を含むＪＩ
Ｓの１１００の純Ａｌ系スクラップを用いて、溶解温度
は７１０℃、溶解炉は１０トンの反射型溶解炉（重油炊
き）で大気溶解とした。またＰｂ１．０重量％を含むＪ
ＩＳ６０６３系のＡｌ合金スクラップは、７５０℃、３
トンの低周波誘導炉を用い、大気溶解とした。表１〜２
に示した添加物を用いて原料溶解を行い、元素分析を行
った。また溶湯残留酸化物による欠陥の発生の有無を検
査し合否を求めた。結果を表１〜２に示した。JI containing 1.0% by weight of Pb as a raw material
The melting temperature was 710 ° C using 1100 pure Al-based scrap of S, and the melting furnace was melted in the atmosphere in a 10-ton reflection melting furnace (fired with heavy oil). J containing 1.0% by weight of Pb
IS6063 Al alloy scrap is 750 ° C, 3
Using a ton low-frequency induction furnace, the atmosphere was dissolved. Table 1-2
The raw materials were dissolved using the additives shown in (1) and elemental analysis was performed. In addition, the presence or absence of defects due to the residual oxide in the molten metal was inspected to determine whether the defect was acceptable. The results are shown in Tables 1 and 2.
【００１４】[0014]
【表１】 [Table 1]
【００１５】[0015]
【表２】 [Table 2]
【００１６】[0016]
【発明の効果】本発明は以上の様に構成されており、Ａ
ｌまたはＡｌ合金中の不純物Ｐｂを安価にかつ効率よく
除去することができ、高純度なＡｌ、Ａｌ合金を製造す
ることができた。The present invention is configured as described above.
Impurity Pb in 1 or Al alloy could be efficiently removed at low cost, and high-purity Al and Al alloy could be manufactured.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 長尾 元裕 兵庫県神戸市西区高塚台１丁目５番５号 株式会社神戸製鋼所 神戸総合技術研 究所内 (72)発明者 大隅 研治 兵庫県神戸市西区高塚台１丁目５番５号 株式会社神戸製鋼所 神戸総合技術研 究所内 (72)発明者 大賀 清正 兵庫県神戸市西区高塚台１丁目５番５号 株式会社神戸製鋼所 神戸総合技術研 究所内 (72)発明者 新井 基浩 兵庫県神戸市西区高塚台１丁目５番５号 株式会社神戸製鋼所 神戸総合技術研 究所内 (72)発明者 益田 穣司 山口県下関市長府港町14番１号 株式会 社神戸製鋼所長府製造所内 (58)調査した分野(Int.Cl.7，ＤＢ名) C22B 1/00 - 61/00 C22C 1/02 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Motohiro Nagao 1-5-5 Takatsukadai, Nishi-ku, Kobe-shi, Hyogo Kobe Steel, Ltd. Kobe Research Institute (72) Inventor Kenji Osumi Kobe-shi, Hyogo 1-5-5 Takatsukadai, Nishi-ku Kobe Steel, Ltd.Kobe Research Institute (72) Inventor Kiyomasa Oga 1-5-5 Takatsukadai, Nishi-ku, Kobe-shi, Hyogo Kobe Steel, Ltd.Kobe Research Institute In-house (72) Inventor Motohiro Arai 1-5-5 Takatsukadai, Nishi-ku, Kobe City, Hyogo Prefecture Inside Kobe Steel Research Institute, Kobe Research Institute (72) Inventor Joji Masuda 14-1, Minato-cho, Nagafucho, Shimonoseki City, Yamaguchi Company Kobe Steel Chofu Works (58) Field surveyed (Int.Cl. 7 , DB name) C22B 1/00-61/00 C22C 1/02
Claims (3)
合金溶湯中に、ＳｉＯ2 および／またはＳｉ系複合酸化
物を添加し、不純物Ｐｂとの間にＳｉ−Ｐｂ−Ｏ系複合
酸化物を形成させてこれを分離する工程を含むことを特
徴とするＡｌまたはＡｌ合金の製造方法。1. Al or Al containing Pb as an impurity
A step of adding SiO 2 and / or a Si-based composite oxide to the molten alloy, forming a Si—Pb—O-based composite oxide with the impurity Pb, and separating the same. Manufacturing method of Al or Al alloy.
されたＡｌまたはＡｌ合金溶湯中に、不活性ガスを吹込
んで溶湯中の該複合酸化物の浮上分離を促進するもので
ある請求項１に記載の製造方法。2. The method according to claim 1, wherein an inert gas is blown into the Al or Al alloy melt on which the Si—Pb—O-based composite oxide is formed to promote the floating separation of the composite oxide in the melt. Item 1. The production method according to Item 1.
されたＡｌまたはＡｌ合金溶湯中の該複合酸化物を、耐
火性フィルターを介して分離除去するものである請求項
１または２に記載の製造方法。3. The method according to claim 1, wherein the composite oxide in the Al or Al alloy melt on which the Si—Pb—O-based composite oxide is formed is separated and removed through a refractory filter. The manufacturing method as described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00326794A JP3346010B2 (en) | 1994-01-17 | 1994-01-17 | Method for producing Al or Al alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00326794A JP3346010B2 (en) | 1994-01-17 | 1994-01-17 | Method for producing Al or Al alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07207363A JPH07207363A (en) | 1995-08-08 |
| JP3346010B2 true JP3346010B2 (en) | 2002-11-18 |
Family
ID=11552691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP00326794A Expired - Fee Related JP3346010B2 (en) | 1994-01-17 | 1994-01-17 | Method for producing Al or Al alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3346010B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012161460A2 (en) * | 2011-05-20 | 2012-11-29 | 한국생산기술연구원 | Aluminium alloy and manufacturing method for same |
| RU2754862C1 (en) * | 2020-10-20 | 2021-09-08 | федеральное государственное бюджетное образовательное учреждение высшего образования "Иркутский национальный исследовательский технический университет" (ФГБОУ ВО "ИРНИТУ") | Method for producing silumins using amorphous microsilica |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5034103B2 (en) * | 2005-12-06 | 2012-09-26 | 地方独立行政法人北海道立総合研究機構 | Pellet or granular material for aluminum recovery, method for producing the pellet or granular material, and method for recovering aluminum |
| KR101341091B1 (en) | 2011-05-20 | 2014-01-02 | 한국생산기술연구원 | Aluminium alloy and manufacturing method thereof |
-
1994
- 1994-01-17 JP JP00326794A patent/JP3346010B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012161460A2 (en) * | 2011-05-20 | 2012-11-29 | 한국생산기술연구원 | Aluminium alloy and manufacturing method for same |
| WO2012161460A3 (en) * | 2011-05-20 | 2013-01-17 | 한국생산기술연구원 | Aluminium alloy and manufacturing method for same |
| KR101402896B1 (en) * | 2011-05-20 | 2014-06-02 | 한국생산기술연구원 | Aluminium alloy and manufacturing method thereof |
| RU2754862C1 (en) * | 2020-10-20 | 2021-09-08 | федеральное государственное бюджетное образовательное учреждение высшего образования "Иркутский национальный исследовательский технический университет" (ФГБОУ ВО "ИРНИТУ") | Method for producing silumins using amorphous microsilica |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07207363A (en) | 1995-08-08 |
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