JPH0222405A - Fine powder manufacturing apparatus - Google Patents
Fine powder manufacturing apparatusInfo
- Publication number
- JPH0222405A JPH0222405A JP17104688A JP17104688A JPH0222405A JP H0222405 A JPH0222405 A JP H0222405A JP 17104688 A JP17104688 A JP 17104688A JP 17104688 A JP17104688 A JP 17104688A JP H0222405 A JPH0222405 A JP H0222405A
- Authority
- JP
- Japan
- Prior art keywords
- container
- fine powder
- atmospheric gas
- gas
- vessel
- 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
Links
- 239000000843 powder Substances 0.000 title claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 238000002347 injection Methods 0.000 claims abstract description 12
- 239000007924 injection Substances 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 13
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 229910001111 Fine metal Inorganic materials 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims 1
- 239000010419 fine particle Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 238000009792 diffusion process Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 39
- 239000011882 ultra-fine particle Substances 0.000 description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 239000002184 metal Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 239000001257 hydrogen Substances 0.000 description 5
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000012768 molten material Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 125000004429 atom Chemical group 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 206010011224 Cough Diseases 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- PTVDYARBVCBHSL-UHFFFAOYSA-N copper;hydrate Chemical compound O.[Cu] PTVDYARBVCBHSL-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Landscapes
- Physical Or Chemical Processes And Apparatus (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は金属材料またはセラミックスの超微粒子の製造
装置に関する。更に詳しくはアークプラズマ放電、高周
波プラズマ放電等により活性化された二原子分子ガス（
水素、窒素など）と溶融金属との反応を利用した超微粒
子製造を製造するさいに雰囲気ガスによる人工龍巻を形
成させることによって超微粒子回収率を向上させた超微
粒子製造装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for producing ultrafine particles of metal materials or ceramics. More specifically, diatomic molecular gas (
The present invention relates to an ultrafine particle production device that improves the recovery rate of ultrafine particles by forming an artificial tornado using atmospheric gas when producing ultrafine particles using a reaction between molten metal and hydrogen (hydrogen, nitrogen, etc.).
特公昭５７−４４７２５号公報、特開昭５８−１０４１
０３号公報（特公昭５８−５４１６６号公報）、特開昭
６１−４２３１８号公報等は、アークやプラズマ放電に
よる超微粒子の製造法を開示する。その原理は、密閉容
器の超微粒子発生室内にセットした水冷銅台上に微粒子
化する材料を置き、この材料とタングステン電極との間
で放電を起こさせ、雰囲気ガスである水素または窒素や
酸素をアークで活性化させ、この活性化ガスをアーク熱
によって溶融した原材料に過飽和に溶解させそして放出
させることによって、原材料を強制的に蒸発させて超微
粒子を発生するものである。そして前記公報のうち、特
開昭５８−１０４１０３号公報（特公昭５Ｂ−５４１６
６号公報）は９発生した超微粒子を、循環する雰囲気ガ
スの気流によって発生室内から室外に排出させる方法を
開示している。そのさい、循環ガス導入口を、軸を垂直
にした円筒状の発生室上部において接線方向に取り付け
ると共に、吸込口を下端に設けることによって、室内で
下方に向かう旋回流を形成させ、この旋回流によって超
微粉を搬送する方法を開示する。Japanese Patent Publication No. 57-44725, Japanese Patent Publication No. 58-1041
03 (Japanese Patent Publication No. 58-54166), JP-A-61-42318, etc. disclose methods for producing ultrafine particles using arc or plasma discharge. The principle is that the material to be atomized is placed on a water-cooled copper stand set inside an ultrafine particle generation chamber in a sealed container, and a discharge is caused between this material and a tungsten electrode to release hydrogen, nitrogen, or oxygen from the atmospheric gas. The activated gas is supersaturated with the raw material melted by the arc heat and released, thereby forcibly evaporating the raw material and generating ultrafine particles. Among the above-mentioned publications, JP-A-58-104103 (JP-A-58-104103 (JP-A-5B-5416)
No. 6) discloses a method in which the generated ultrafine particles are discharged from a generation chamber to the outside by an air flow of a circulating atmospheric gas. At that time, by attaching the circulating gas inlet tangentially at the top of the cylindrical generation chamber with the axis vertical, and by providing the suction port at the lower end, a downward swirling flow is formed in the chamber, and this swirling flow Discloses a method for transporting ultrafine powder.
該公報に示される原理によって発生室内で生成した超微
粒子はその全てが循環ガスによつて室外に搬送されフィ
ルターで捕集されることが望ましい。しかし、実際には
超微粒子発生室の内壁、電極への付着または銅水冷台上
へ付着する超微粒子の量が多く、超微粒子の全発生量に
対するフィルターでの回収量は装置の構造及び循環ポン
プの能力に著しく影響され、フィルターでの完全な回収
を図ることが困難であることがわかった。It is desirable that all of the ultrafine particles generated in the generation chamber according to the principle disclosed in the publication be transported outside by circulating gas and collected by a filter. However, in reality, a large amount of ultrafine particles adhere to the inner walls of the ultrafine particle generation chamber, the electrodes, or the copper water cooling table, and the amount recovered by the filter compared to the total amount of ultrafine particles generated depends on the structure of the device and the circulation pump. It was found that it was difficult to achieve complete recovery using a filter.
ゆえに本発明の目的は、前記のような原理によって超微
粒子を製造するさいに、超微粒子発生室内壁等への超微
粒子の付着を減少させ、フィルターでの回収率を向上さ
せる装置を提供することにある。Therefore, an object of the present invention is to provide an apparatus that reduces the adhesion of ultrafine particles to the walls of an ultrafine particle generation chamber and improves the recovery rate in a filter when producing ultrafine particles using the principle described above. It is in.
本発明は人工龍巻発生機構を超微粒子発生装置内に取入
れることによって前記の問題点の解決を図ったものであ
る。すなわち、密閉容器内において電極と被処理材料と
の間で放電させる微粉発生帯域を形成し、この密閉容器
内に雰囲気ガスとして水素、窒素、酸素等の二原子分子
ガスを循環させると共に該微粉発生帯域で発生した微粉
を雰囲気ガスの排出気流に同伴させて密閉容器から取り
出すようにした微粉製造装置において、該密閉容器とし
て軸を水平方向にした円筒状の容器を使用し、この容器
の軸芯部若しくはその近傍に微粉発生帯域を形成すると
共に容器内の内周面近傍に容器の軸と実質上平行にパイ
プ状の雰囲気ガス供給ヘソグーを配置し、このヘラグー
に、容器内周面の接線方向にノズル口を向けた雰囲気ガ
ス噴射ノズルを、容器胴部のほぼ全長さにわたって連設
し。The present invention aims to solve the above-mentioned problems by incorporating an artificial tornado generating mechanism into an ultrafine particle generator. That is, a fine powder generation zone is formed between an electrode and a material to be treated in a closed container, and a diatomic molecular gas such as hydrogen, nitrogen, or oxygen is circulated as an atmospheric gas in this closed container, and the fine powder is generated. In a fine powder production device in which fine powder generated in a zone is taken out from a closed container by being accompanied by an exhaust airflow of atmospheric gas, a cylindrical container with the axis oriented horizontally is used as the closed container, and the axis of the container is A fine powder generation zone is formed at or near the inner circumferential surface of the container, and a pipe-shaped atmospheric gas supplying groove is arranged substantially parallel to the axis of the container near the inner circumferential surface of the container. Atmospheric gas injection nozzles with nozzle ports facing toward the inside are installed in series along almost the entire length of the container body.
容器の軸と直角方向の一方のサイド壁面の中央部に雰囲
気ガス吸引口を設け、該へラグ−の噴射ノズルから容器
内に雰囲気ガスを噴射し且つ該吸引口から該ガスを吸引
することにより容器軸回りに旋回しつつ前記吸引口に向
けて縮流する雰囲気ガスの龍巻状流れを容器内に形成さ
せ、この龍巻状ガス流れに乗せて該微粉発生帯域で発生
した微粉を吸引口から容器外に搬出するようにしたこと
を特徴とする微粉製造装置である。By providing an atmospheric gas suction port in the center of one side wall in the direction perpendicular to the axis of the container, injecting the atmospheric gas into the container from the injection nozzle of the heater and sucking the gas from the suction port. A tornado-like flow of atmospheric gas is formed in the container, swirling around the axis of the container and condensing toward the suction port, and the fine powder generated in the fine powder generation zone is carried by this tornado-like gas flow to the suction port. This is a fine powder manufacturing apparatus characterized in that the fine powder is transported from the container to the outside of the container.
本装置は、溶融した材料に活性化されたガス流を接触さ
せると材料中に該ガス原子が過飽和に溶解し、この過飽
和に溶解した原子が再び雰囲気中に分子状となって放出
するさいに溶融材料表面から該材料の微粒子が雰囲気中
に同伴放出されるという現象を微粉製造に利用するもの
であり、したがって、溶融した材料に活性化されたガス
が溶解し放出するという現象が生ずる限りあらゆる材料
から微粉を製造することができるが、一般には金属また
はセラミックが好適である。材料の溶融およびガスの活
性化を同時に行なう方式には熱プラズマが好ましく、ア
ーク放電、高周波放電も適用できる。This device works by bringing an activated gas flow into contact with a molten material, causing the gas atoms to dissolve in the material to a supersaturated state, and when the supersaturated dissolved atoms are released into the atmosphere as molecules again. The phenomenon in which fine particles of the material are released from the surface of the molten material into the atmosphere is utilized in the production of fine powder. Therefore, as long as the phenomenon of activated gas dissolving and releasing into the molten material occurs, any Although fine powders can be made from the materials, metals or ceramics are generally suitable. Thermal plasma is preferred as a method for melting the material and activating the gas at the same time, and arc discharge and high frequency discharge are also applicable.
以下に図面に示した本発明装置の実施例について説明す
る。Embodiments of the apparatus of the present invention shown in the drawings will be described below.
第１図および第２図は本発明装置の要部を示したちので
１図示のように１本発明では微粒子を発生させる密閉容
器として軸を水平方向にしてセントした円筒状容器１使
用する。図示の例ではこの円筒状容器ｌは１円周内面を
もつ円筒胴部２とこの円筒胴部２の両端を塞ぐ軸と直角
なサイド壁３ａおよび３ｂとで構成されている。この円
筒状密閉容器１内において、先の諸公報に示されたのと
同様の原理によって金属またはセラミンク等の微粒子を
発生させるのであるが、このために２円筒胴部２のほぼ
中実軸芯部に微粉発生帯域４（以下、これを放電帯域４
と呼ぶが、熱プラズマの投射帯域もこれに含まれるもの
である）を形成させる。1 and 2 show the main parts of the apparatus of the present invention, and as shown in FIG. 1, the present invention uses a cylindrical container 1 with its axis oriented horizontally as a closed container for generating fine particles. In the illustrated example, the cylindrical container 1 is composed of a cylindrical body 2 having one circumferential inner surface and side walls 3a and 3b perpendicular to the axis that close both ends of the cylindrical body 2. Inside this cylindrical closed container 1, fine particles of metal or ceramics are generated according to the same principle as shown in the previous publications. Part of the fine powder generation zone 4 (hereinafter referred to as discharge zone 4)
(this also includes a projection zone of thermal plasma).
この放電帯域４は、容器１内の底部に設置された水冷銅
部材からなる溶解台５の上の被処理材料６（以下、金属
材料を例として説明する）と、容器ｊ内に上部から挿入
し７た電極７とを対向配置することによって形成されて
いる。これによって容器１内を水素含有ガス雰囲気とし
て放電を行わせると、活性化した水素が溶融した金属６
に溶解して金属が強制的に蒸発し金属微粉末が生成する
。This discharge zone 4 is connected to a material to be processed 6 (hereinafter explained using a metal material as an example) on a melting table 5 made of a water-cooled copper member installed at the bottom of the container j, and a material to be treated that is inserted from the top into the container j. It is formed by arranging the electrodes 7 facing each other. As a result, when the inside of the container 1 is made into a hydrogen-containing gas atmosphere and a discharge is performed, the activated hydrogen becomes a molten metal 6.
The metal is forcibly evaporated and fine metal powder is produced.
雰囲気ガスに酸素または窒素を使用すると、咳金属の酸
化物または窒化物のセラミック微粉末を得ることができ
る。When oxygen or nitrogen is used as the atmospheric gas, fine ceramic powders of oxides or nitrides of metals can be obtained.
本発明装置においては、容器胴部２の長さにほぼ等しい
長さを有するバイブ状のヘッダー８を容器】の軸と実質
上平行に、容器１内の内周面近傍に配置する。このヘッ
ダー８には容器胴部の内周面の接線方向にノズル口を向
けた雰囲気ガス噴射ノズル９が容器胴部２のほぼ全長さ
にわたって連設されている。これによって、雰囲気ガス
供給管路１０からヘッダー８内に雰囲気ガスが供給され
ると、各噴射ノズル９から容器胴部の内周面に沿う方向
にガスが一斉に吐出し、容器胴部全体にわたって軸回り
の旋回流が形成される。なお１図示の例では噴射ノズル
９はヘングー８に所定間隔を開けて連設した小口径ノズ
ルの例を示したが、これに代えてヘッダー８にスリット
状の開口を設けたものでもよい。このスリント状開ロノ
ズルを使用する場合にもその吐出口の方向が容器胴部の
内周面の接線方向であることが必要である。In the apparatus of the present invention, a vibrator-shaped header 8 having a length approximately equal to the length of the container body 2 is arranged in the vicinity of the inner circumferential surface of the container 1, substantially parallel to the axis of the container. Atmospheric gas injection nozzles 9 are connected to the header 8 over substantially the entire length of the container body 2, the nozzle opening of which is oriented tangentially to the inner peripheral surface of the container body. As a result, when the atmospheric gas is supplied from the atmospheric gas supply pipe 10 into the header 8, the gas is discharged all at once from each injection nozzle 9 in the direction along the inner circumferential surface of the container body, and the gas is discharged over the entire container body. A swirling flow around the axis is formed. In the example shown in Figure 1, the injection nozzles 9 are small-diameter nozzles arranged in series on the header 8 at a predetermined interval, but instead of this, the header 8 may have slit-like openings. When using this slint-like open nozzle, it is also necessary that the direction of the discharge port be tangential to the inner circumferential surface of the container body.
他方、容器１の一方のサイド壁３ｂの中央部に雰囲気ガ
ス吸引口１１を設ける。この吸引口１１は吸弓ダクト１
２を経て循環ファン１３に接続され、この循環ファン１
３の吐出側にヘッダー８に通ずるガス供給管１０が接続
されている。そして、９引ダクト１２にはフィルターユ
ニット１４が介装され、ガス供給管１０にはガスＩｃが
流量調整弁Ｖを介して接続されている。On the other hand, an atmospheric gas suction port 11 is provided in the center of one side wall 3b of the container 1. This suction port 11 is the suction bow duct 1
2 to the circulation fan 13, and this circulation fan 1
A gas supply pipe 10 leading to a header 8 is connected to the discharge side of the gas pump 3 . A filter unit 14 is interposed in the nine-pull duct 12, and a gas Ic is connected to the gas supply pipe 10 via a flow rate regulating valve V.
この構成によって、循環ファン１３を駆動し雰囲気ガス
を容器１内に循環すると、ヘッダー８の噴射ノズル９か
ら容器１内に吐出した雰囲気ガスは容器胴部２の全内周
面に沿った旋回流を形成しつつ吸込口１１からの吸込気
流に巻き込まれ、一方のサイド壁３ｂから吸込口１１の
存在するサイド壁４の方向に向けて咳旋回流が漸次縮径
した渦流を形成する。放電帯域４は容器胴部２のほぼ中
央における軸芯部に形成されていることから、放電帯域
４で発生した微粉末は前記の縮径した渦流に巻き込まれ
一種の龍巻状の流れとなって吸込口１１に向がって流れ
込む、すなわち、吸込口１１が一方のサイド壁３ｂの中
央に設けられ、この中央の吸込口１１からの吸込流によ
って負圧域が容器胴部２の軸芯に沿って形成され、この
負圧コア一部が前記の旋回流に求心力を付与するので、
遠心力と求心力がバランスする範囲で循環流は渦流とな
り中心部に収束しながら吸込口１１に向かう龍巻状の流
れが生成する。これによって、放電帯域４で発生した微
粉末は容器内壁に向かう方向の拡散が抑制され、容器内
壁や内部部材への付着更には容器底部への堆積が防止さ
れる。特に本発明装置では上下方向にアークを飛ばす放
電帯域４から直ちに横方向に向かう龍巻流が形成される
ので、電極７や溶解台６に向かう上下方向への微粉末の
拡散が抑制され。With this configuration, when the circulation fan 13 is driven to circulate the atmospheric gas into the container 1, the atmospheric gas discharged into the container 1 from the injection nozzle 9 of the header 8 flows into a swirling flow along the entire inner peripheral surface of the container body 2. The cough swirl flow is caught in the suction airflow from the suction port 11 and forms a whirlpool whose diameter gradually decreases from one side wall 3b toward the side wall 4 where the suction port 11 is present. Since the discharge zone 4 is formed at the axial center of the container body 2, the fine powder generated in the discharge zone 4 is caught up in the diameter-reduced vortex and forms a kind of tornado-like flow. In other words, the suction port 11 is provided at the center of one side wall 3b, and the suction flow from the central suction port 11 creates a negative pressure area that is aligned with the axis of the container body 2. A part of this negative pressure core applies centripetal force to the swirling flow, so
In a range where the centrifugal force and the centripetal force are balanced, the circulating flow becomes a vortex, and a tornado-like flow that heads toward the suction port 11 while converging at the center is generated. As a result, the fine powder generated in the discharge zone 4 is suppressed from diffusing toward the inner wall of the container, and is prevented from adhering to the inner wall or internal members of the container and further from being deposited on the bottom of the container. In particular, in the apparatus of the present invention, since a tornado flow is immediately formed in the horizontal direction from the discharge zone 4 that sends an arc in the vertical direction, the diffusion of fine powder in the vertical direction toward the electrode 7 and the melting table 6 is suppressed.
その結果電極７や溶解台６付近への微粉末の付着が効果
的に防止できる。As a result, adhesion of fine powder to the vicinity of the electrode 7 and the melting table 6 can be effectively prevented.
そして２本発明装置では、フィルターユニット１４に捕
集される微粉末の増減によって気体循環経路の圧填の変
化が生し、−・ラダー８の噴射ノズル９からの吐出速度
に若干の変化が生じても旋回流の流れパターンには大き
な変化はなく、吸込口１】からの吸引流によって所定の
負圧が発生する限り龍巻流が形成される。したがって、
処理の始めから終わりまで微粉末の容器壁等への付着と
堆積が防止できることから、フィルターユニット１４で
の微粉末の回収率を高めることができ１前述の従来法の
問題が解決されたものである。2. In the device of the present invention, the pressure in the gas circulation path changes depending on the increase or decrease of the fine powder collected in the filter unit 14, and the discharge speed from the injection nozzle 9 of the ladder 8 changes slightly. However, there is no major change in the flow pattern of the swirling flow, and as long as a predetermined negative pressure is generated by the suction flow from the suction port 1, a tornado flow is formed. therefore,
Since it is possible to prevent the fine powder from adhering to and accumulating on the container wall etc. from the beginning to the end of the treatment, the collection rate of the fine powder in the filter unit 14 can be increased, and the problems of the conventional method mentioned above have been solved. be.
装置の諸元は次のとおりである。 The specifications of the device are as follows.
容器１の内径： ４０ＯＮ１１
容器胴部２の長さ： ８００ｍ翔
電極７：タングステン電極 直径４ＩＩＭ循環ガス流量
： １３５１ ／＋ｓｉｎその内トーチ： ５ ｉ／ｍ
ｉｎ
龍巻流： １３０ （１／ｍｉｎ
供試材及び処理条件
供試材：純鉄
雰囲気ガス：５０％Ｈｚ −Ａ ｒ
アーク電流１５０Ａ
アーク電圧：３０■
処理時間：６０分
以上の条件で純鉄の超微粉を製造した。その結果、フィ
ルターユニット１４で回収された超微粉の量は、全発生
量の７２．４％に達し、容器１内に滞留した量は２７．
６％にすぎなかった。Inner diameter of container 1: 40ON11 Length of container body 2: 800m Electrode 7: Tungsten electrode Diameter 4IIM Circulating gas flow rate: 1351 /+sin internal torch: 5 i/m
in Tornado flow: 130 (1/min) Test material and processing conditions Test material: Pure iron Atmosphere gas: 50% Hz -A r Arc current 150A Arc voltage: 30■ Processing time: Pure iron under conditions of 60 minutes or more As a result, the amount of ultrafine powder collected by the filter unit 14 reached 72.4% of the total amount generated, and the amount retained in the container 1 was 27.4%.
It was only 6%.
これに対し、特開昭５８−１０４１０３号公報に記載の
装置の場合にはフィルターでの回収率は５６．４％であ
り、容器内に滞留した量は４３．６％にも達した。On the other hand, in the case of the apparatus described in JP-A-58-104103, the recovery rate in the filter was 56.4%, and the amount retained in the container reached 43.6%.
第１図は本発明装置の要部を示す略断面図、第２図は第
１図の■−■線矢視断面図である。
１・・円筒状容器、 ２・・容器胴部、 ３・容器
のサイド壁、 ４・・微粉発生帯域（放電帯域、
５・・溶解台、 ６・・被処理材料。
７・・電極、 ８・・ガス供給ヘッダー９・・噴射ノ
ズル、１１・・吸込口、 １３・・循環ファン、１４
・・フィルターユニット。FIG. 1 is a schematic sectional view showing the main parts of the apparatus of the present invention, and FIG. 2 is a sectional view taken along the line ■--■ in FIG. 1. Cylindrical container, 2. Container body, 3. Side wall of the container, 4. Fine powder generation zone (discharge zone,
5. Melting table, 6. Material to be processed. 7. Electrode, 8. Gas supply header 9. Injection nozzle, 11. Suction port, 13. Circulation fan, 14
...filter unit.
Claims (2)
る微粉発生帯域を密閉容器内に形成し、該密閉容器内に
雰囲気ガスを循環させると共に該微粉発生帯域で発生し
た微粉を該雰囲気ガスの排出気流に同伴させて該密閉容
器から取り出すようにした金属微粉の製造装置において
、 前記の密閉容器として円筒状の容器を使用し、該容器の
軸芯部若しくはその近傍に前記の微粉発生帯域を形成し
、 該容器内の内周面近傍に容器の軸と実質上平行にパイプ
状の雰囲気ガス供給ヘッダーを配置し、このヘッダーに
、該内周面の接線方向にノズル口を向けた雰囲気ガス噴
射ノズルを、容器胴部のほぼ全長さにわたって連設し、 該円筒状容器を形成する軸と直角方向の一方のサイド壁
面の中央部に雰囲気ガス吸引口を設け、該噴射ノズルか
ら容器内に雰囲気ガスを噴射し且つ該吸引口から該ガス
を吸引することにより容器の軸回りに旋回しつつ前記吸
引口に向けて縮流する雰囲気ガスの龍巻状のガス流れを
容器内に形成させ、 この龍巻状ガス流れに乗せて該微粉発生帯域で発生した
微粉を該吸引口から容器外に搬出するようにしたことを
特徴とする微粉製造装置。(1) A fine powder generation zone is formed in a closed container in which activated gas is brought into contact with the melt of the material to be treated, and atmospheric gas is circulated within the closed container and the fine powder generated in the fine powder generation zone is In an apparatus for producing fine metal powder, which is taken out from the closed container along with the exhaust airflow of atmospheric gas, a cylindrical container is used as the closed container, and the fine powder is placed at or near the axis of the container. A generating zone is formed, a pipe-shaped atmospheric gas supply header is arranged near the inner peripheral surface of the container substantially parallel to the axis of the container, and a nozzle opening is directed to the header in a tangential direction of the inner peripheral surface. Atmospheric gas injection nozzles are arranged in series along almost the entire length of the container body, and an atmospheric gas suction port is provided in the center of one side wall surface in a direction perpendicular to the axis forming the cylindrical container, and from the injection nozzles By injecting atmospheric gas into the container and suctioning the gas from the suction port, a tornado-shaped gas flow of the atmospheric gas that constricts toward the suction port while rotating around the axis of the container is created inside the container. A fine powder manufacturing apparatus characterized in that the fine powder generated in the fine powder generation zone is transported out of the container from the suction port along with the tornado-shaped gas flow.
る請求項１に記載の微粉製造装置。(2) The fine powder manufacturing apparatus according to claim 1, wherein the closed container is a cylindrical container with an axis oriented horizontally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17104688A JPH0222405A (en) | 1988-07-11 | 1988-07-11 | Fine powder manufacturing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17104688A JPH0222405A (en) | 1988-07-11 | 1988-07-11 | Fine powder manufacturing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0222405A true JPH0222405A (en) | 1990-01-25 |
Family
ID=15916082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17104688A Pending JPH0222405A (en) | 1988-07-11 | 1988-07-11 | Fine powder manufacturing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0222405A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5854166A (en) * | 1981-09-24 | 1983-03-31 | 新進通信株式会社 | Standard structure |
| JPS58104103A (en) * | 1981-12-17 | 1983-06-21 | Natl Res Inst For Metals | Method and device for producing fine metallic particle |
| JPS62178826A (en) * | 1986-01-31 | 1987-08-05 | Nippon Air Curtain Kk | Device for preventing harmful gas from diffusing |
| JPS62225838A (en) * | 1986-03-26 | 1987-10-03 | Nippon Air Curtain Kk | Air shower device |
-
1988
- 1988-07-11 JP JP17104688A patent/JPH0222405A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5854166A (en) * | 1981-09-24 | 1983-03-31 | 新進通信株式会社 | Standard structure |
| JPS58104103A (en) * | 1981-12-17 | 1983-06-21 | Natl Res Inst For Metals | Method and device for producing fine metallic particle |
| JPS62178826A (en) * | 1986-01-31 | 1987-08-05 | Nippon Air Curtain Kk | Device for preventing harmful gas from diffusing |
| JPS62225838A (en) * | 1986-03-26 | 1987-10-03 | Nippon Air Curtain Kk | Air shower device |
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