JPH05179316A - Production of metal powder - Google Patents

Production of metal powder

Info

Publication number
JPH05179316A
JPH05179316A JP34623891A JP34623891A JPH05179316A JP H05179316 A JPH05179316 A JP H05179316A JP 34623891 A JP34623891 A JP 34623891A JP 34623891 A JP34623891 A JP 34623891A JP H05179316 A JPH05179316 A JP H05179316A
Authority
JP
Japan
Prior art keywords
plasma jet
metal
metal powder
powder
melting
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.)
Pending
Application number
JP34623891A
Other languages
Japanese (ja)
Inventor
Kengo Inage
賢吾 稲毛
Makoto Oya
誠 大矢
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokuriki Honten Co Ltd
Original Assignee
Tokuriki Honten Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tokuriki Honten Co Ltd filed Critical Tokuriki Honten Co Ltd
Priority to JP34623891A priority Critical patent/JPH05179316A/en
Publication of JPH05179316A publication Critical patent/JPH05179316A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To easily obtain metal powder utilizable for powder metallurgy, electric conductive paste, etc., even from a small amt. of metal stock by blowing a plasma jet on the metal stock, sputtering the metal melted by the plasma jet and collecting the resulting metal powder. CONSTITUTION:A plasma jet torch for generating a high-temp. high-speed plasma jet and melting metal stock is prepd. Such a plasma jet is directly blown on metal stock such as an ingot or wire with the torch to locally melt the metal stock. This melted metal is sputtered with the gas of the plasma jet itself and the resulting metal powder is collected.

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、粉末冶金や導電ペース
ト等に広く利用されている金属粉の製造方法に関するも
のである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing metal powder which is widely used in powder metallurgy, conductive paste and the like.

【0002】[0002]

【従来の技術】金属粉は粉末冶金や導電ペースト等に広
く利用されている。また、金属粉は表面積が大きく化学
反応が早いことを利用して、回収精製において作業能率
を上げることにも利用が可能である。これらのことよ
り、金属を粉にして利用することは、今後もますます範
囲が広がって行くことが予想される。
2. Description of the Related Art Metal powder is widely used in powder metallurgy, conductive paste and the like. In addition, the fact that metal powder has a large surface area and a rapid chemical reaction can be used to improve work efficiency in recovery and purification. From these things, it is expected that the use of powdered metal will continue to expand in the future.

【0003】従来における金属粉の製造方法は、化学反
応を利用した製造方法、やすり等の機械的な製造方法、
溶解した金属を水やガスで吹き飛ばすアトマイズによる
方法が取られており、各々の方法は目的の金属の種類や
形状等により選択される。
[0003] Conventional methods for producing metal powders include a production method utilizing a chemical reaction, a mechanical production method such as a file,
Atomization is used in which the dissolved metal is blown off with water or gas, and each method is selected according to the type and shape of the target metal.

【0004】[0004]

【発明が解決しようとする課題】従来における金属粉の
製造方法の内、アトマイズはある一定量の目的の金属ま
たは合金を溶解炉を用いて融点以上にし、溶解した状態
から流速の早い水あるいはガス等で吹き飛ばし、霧吹き
のような状態で金属粉を製造するものである。そのた
め、装置も溶解,アトマイズ,回収,乾燥装置等、大が
かりな装置が必要で、導入にはかなりのスペースを必要
とする問題がある。
Among the conventional methods for producing metal powder, atomization is a method in which a certain amount of a target metal or alloy is made to have a melting point or higher by using a melting furnace, and water or gas having a high flow rate from a molten state is used. The metal powder is manufactured in a state like a spray of water. Therefore, a large-scale apparatus such as a melting, atomizing, collecting, and drying apparatus is required as the apparatus, and there is a problem that a considerable space is required for introduction.

【0005】また、アトマイズを行うにはある程度の溶
解量を必要とし、少量のものには不向きであるという問
題がある。さらに、多くの高融点金属では、その融点以
上の耐火物がないためアトマイズ作業用の溶解るつぼが
無く、多くの高融点金属の場合、アトマイズでは金属粉
の製造がほとんど不可能であるという問題がある。
Further, there is a problem that a certain amount of dissolution is required to perform atomization, and it is not suitable for small amounts. Further, in many refractory metals, there is no melting crucible for atomizing work because there is no refractory above the melting point, and in the case of many refractory metals, there is a problem that it is almost impossible to produce metal powder by atomization. is there.

【0006】本発明は、このような問題を解決するため
になされたもので、アトマイズを改良して、装置を小型
化し、かつ少量の金属素材からでも金属粉を捕集でき、
さらに高融点の金属や合金からでも金属粉を捕集できる
金属粉の製造方法を提供することを目的とする。
The present invention has been made in order to solve such a problem, and improves atomizing, downsizing the apparatus, and collecting metal powder from a small amount of metal material.
It is another object of the present invention to provide a method for producing metal powder that can collect metal powder even from a metal or alloy having a high melting point.

【0007】[0007]

【課題を解決するための手段】この目的を達成するた
め、本発明は、金属素材を溶解しうる高温,高速のプラ
ズマジェットを発生するプラズマジェットトーチを備
え、プラズマジェットを例えばインゴットや線材等の金
属素材に直接吹きつけて該金属素材を局部的に溶解し、
これをプラズマジェット自体のガスを利用して吹き飛ば
すことにより金属粉を捕集する金属粉の製造方法であ
る。
In order to achieve this object, the present invention comprises a plasma jet torch for generating a high-temperature, high-speed plasma jet capable of melting a metal material. Directly spray the metal material to locally dissolve the metal material,
This is a method for producing metal powder in which the metal powder is collected by blowing it off using the gas of the plasma jet itself.

【0008】以上の金属粉の製造方法では、プラズマジ
ェットの当たった部分だけが溶解し、かつそれをプラズ
マジェット自体のガスを利用して吹き飛ばして金属粉を
捕集するので、少量の金属素材からでも金属粉を捕集で
き、また金属素材の形状も問題とならない。さらに溶解
炉が不要なので装置も小型で済み、また、高エネルギー
のプラズマジェット(例えば温度6000〜12000
℃、速度マッハ3〜5)を利用するため高融点の金属や
合金にも利用できる。
In the above-described method for producing metal powder, only the portion hit by the plasma jet is melted, and the gas of the plasma jet itself is used to blow it off to collect the metal powder. However, the metal powder can be collected, and the shape of the metal material does not matter. Furthermore, since a melting furnace is not required, the device can be made small, and a high-energy plasma jet (for example, a temperature of 6000 to 12000)
Since the temperature and the velocity Mach 3 to 5) are used, it can be used for high melting point metals and alloys.

【0009】そして、溶解時に問題となるるつぼ等から
の不純物の汚染を防ぐことができる。
Further, it is possible to prevent the contamination of impurities from the crucible or the like which is a problem during melting.

【0010】[0010]

【実施例】以下、本発明の実施例を説明する。第1の実
施例として、厚み3mm,幅5mmのPt板を素材と
し、このPt板を溶解しうる高温,高速のプラズマジェ
ットを発生する溶断用プラズマトーチを使用して、この
溶断用プラズマトーチのプラズマジェットがPt板に当
たるように溶断用プラズマトーチをPt板を挟んで一方
に設置する。
EXAMPLES Examples of the present invention will be described below. As a first embodiment, a Pt plate having a thickness of 3 mm and a width of 5 mm is used as a raw material, and a plasma torch for melting that generates a high-temperature, high-speed plasma jet capable of melting the Pt plate is used. A plasma torch for fusing is installed on one side of the Pt plate so that the plasma jet hits the Pt plate.

【0011】さらに、Pt板が溶解されてプラズマジェ
ットにより吹き飛ばされる金属粉を捕集するために、水
を入れた水槽をPt板を挟んで他方に配置する。そし
て、プラズマジェットをPt板に吹きつけ、該Pt板を
局部的に溶解し、これをプラズマジェット自体のガスに
より吹き飛ばして水槽に集め、水槽の水を乾燥させて金
属粒子を捕集したところ、約φ1〜0.1の金属粉を得
た。
Further, in order to collect the metal powder that is melted by the Pt plate and blown away by the plasma jet, a water tank containing water is arranged on the other side of the Pt plate. Then, a plasma jet was blown onto the Pt plate, the Pt plate was locally dissolved, and the Pt plate was blown away by the gas of the plasma jet itself and collected in a water tank, and the water in the water tank was dried to collect metal particles, A metal powder having a diameter of about φ1 to 0.1 was obtained.

【0012】第2の実施例として、線径φ4mmの10
Rh−Pt合金ワイヤを素材とし、この10Rh−Pt
合金ワイヤを溶解しうる高温,高速のプラズマジェット
を発生する溶断用プラズマトーチを使用して、この溶断
用プラズマトーチのプラズマジェットが10Rh−Pt
合金ワイヤに当たるように溶断用プラズマトーチを10
Rh−Pt合金ワイヤを挟んで一方に設置する。
As a second embodiment, a wire diameter of 10 mm with a diameter of 4 mm is used.
Using Rh-Pt alloy wire as the material,
A plasma torch for fusion cutting that generates a high-temperature, high-speed plasma jet capable of melting the alloy wire is used, and the plasma jet of this plasma torch for fusion cutting is 10 Rh-Pt
Use a plasma torch for fusing 10 to hit the alloy wire.
The Rh-Pt alloy wire is sandwiched and installed on one side.

【0013】さらに、10Rh−Pt合金ワイヤが溶解
されてプラズマジェットにより吹き飛ばされる金属粉を
捕集するために、キャンバス布製の捕集フィルタを入口
にセットした集塵装置を10Rh−Pt合金ワイヤを挟
んで他方に配置する。そして、プラズマジェットを10
Rh−Pt合金ワイヤに吹きつけ、該10Rh−Pt合
金ワイヤを局部的に溶解し、これをプラズマジェット自
体のガスにより吹き飛ばすとともに集塵装置で吸引し
て、フィルタにより金属粒子を捕集したところ、約φ1
〜0.001の金属粉を得た。
Further, in order to collect the metal powder that is melted by the 10Rh-Pt alloy wire and blown away by the plasma jet, a dust collector having a collection filter made of canvas cloth set at the inlet is sandwiched between the 10Rh-Pt alloy wire. And place it on the other side. And plasma jet 10
When the Rh-Pt alloy wire was blown, the 10Rh-Pt alloy wire was locally melted, and this was blown off by the gas of the plasma jet itself and sucked by the dust collector, and the metal particles were collected by the filter, About φ1
~ 0.001 metal powder was obtained.

【0014】[0014]

【発明の効果】以上説明したように、本発明は、金属素
材を溶解しうる高温,高速のプラズマジェットを発生す
るプラズマジェットトーチを備え、プラズマジェットを
金属素材に吹きつけて該金属素材を局部的に溶解し、こ
れをプラズマジェットで吹き飛ばすことにより金属粉を
捕集する金属粉の製造方法である。
As described above, the present invention is provided with a plasma jet torch for generating a high-temperature, high-speed plasma jet capable of melting a metal material, and spraying the plasma jet onto the metal material to localize the metal material. It is a method for producing a metal powder in which the metal powder is collected by melting it and blowing it off with a plasma jet.

【0015】上述した本発明における金属粉の製造方法
では、金属素材全体を溶解させるための溶解炉が不要
で、プラズマジェットの当たった部分だけが溶解し、か
つそれをプラズマジェット自体のガスを利用して吹き飛
ばして金属粉を捕集するので、少量の金属素材からでも
金属粉を捕集でき、また金属素材の形状も問題とならな
いという効果がある。
In the above-described method for producing metal powder according to the present invention, a melting furnace for melting the entire metal material is not required, only the portion hit by the plasma jet is melted and the gas of the plasma jet itself is used. Since the metal powder is then blown off and collected, the metal powder can be collected even from a small amount of metal material, and the shape of the metal material does not matter.

【0016】さらに溶解炉が不要なので装置も小型かつ
簡単で済み、また、高エネルギーのプラズマを利用する
ため高融点の金属や合金にも利用できるという効果があ
る。
Further, since the melting furnace is not necessary, the apparatus is small and simple, and since high energy plasma is used, it can be used for high melting point metals and alloys.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 金属素材を溶解しうる高温,高速のプラ
ズマジェットを発生するプラズマジェットトーチを備
え、プラズマジェットを金属素材に吹きつけて該金属素
材を局部的に溶解し、これをプラズマジェットで吹き飛
ばすことにより金属粉を捕集することを特徴とする金属
粉の製造方法。
1. A plasma jet torch for generating a high-temperature, high-speed plasma jet capable of melting a metal material is provided, and the plasma jet is blown onto the metal material to locally melt the metal material. A method for producing metal powder, which comprises collecting the metal powder by blowing it off.
JP34623891A 1991-12-27 1991-12-27 Production of metal powder Pending JPH05179316A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP34623891A JPH05179316A (en) 1991-12-27 1991-12-27 Production of metal powder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP34623891A JPH05179316A (en) 1991-12-27 1991-12-27 Production of metal powder

Publications (1)

Publication Number Publication Date
JPH05179316A true JPH05179316A (en) 1993-07-20

Family

ID=18382052

Family Applications (1)

Application Number Title Priority Date Filing Date
JP34623891A Pending JPH05179316A (en) 1991-12-27 1991-12-27 Production of metal powder

Country Status (1)

Country Link
JP (1) JPH05179316A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111712342A (en) * 2017-07-21 2020-09-25 加拿大派罗杰尼斯有限公司 Method for large scale cost-effective production of ultrafine spherical powders using thruster assisted plasma atomization

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111712342A (en) * 2017-07-21 2020-09-25 加拿大派罗杰尼斯有限公司 Method for large scale cost-effective production of ultrafine spherical powders using thruster assisted plasma atomization

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