JPH04301011A - Device for producing metal powder - Google Patents
Device for producing metal powderInfo
- Publication number
- JPH04301011A JPH04301011A JP8903591A JP8903591A JPH04301011A JP H04301011 A JPH04301011 A JP H04301011A JP 8903591 A JP8903591 A JP 8903591A JP 8903591 A JP8903591 A JP 8903591A JP H04301011 A JPH04301011 A JP H04301011A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- chamber
- gas nozzle
- metal powder
- atomization
- 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
- 239000002184 metal Substances 0.000 title claims abstract description 48
- 239000000843 powder Substances 0.000 title claims abstract description 29
- 238000000889 atomisation Methods 0.000 claims abstract description 23
- 238000007664 blowing Methods 0.000 claims abstract description 10
- 238000005192 partition Methods 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 238000010992 reflux Methods 0.000 claims description 14
- 239000007921 spray Substances 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 238000009689 gas atomisation Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 55
- 230000000694 effects Effects 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 230000006698 induction Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は金属溶湯をガス噴射によ
り微粒化して金属粉末を製造する、いわゆるガスアトマ
イズ法を実施する金属粉末製造装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal powder production apparatus for carrying out the so-called gas atomization method, in which metal powder is produced by atomizing molten metal by gas injection.
【０００２】0002
【従来の技術】図３は従来のガスアトマイズ法による金
属粉末製造装置を示している。１は噴霧チャンバ、２は
噴霧チャンバの上部に設けたガスノズル、３は溶湯４を
入れるタンディッシュ、５は高周波誘導炉等の溶湯炉、
６は溶湯の落下口、７は粉末回収槽、８は金属粉末を示
す。高周波誘導炉５からタンディッシュ３に入れられた
溶湯４は、落下口６から少しづつ自重で落下し、ガスノ
ズル２からの高圧ガスが落下する溶湯に噴射されて溶湯
を微粒化し、金属粉末を作り、この金属粉末は粉末回収
槽７に集められる。2. Description of the Related Art FIG. 3 shows a conventional metal powder manufacturing apparatus using the gas atomization method. 1 is a spray chamber, 2 is a gas nozzle provided at the top of the spray chamber, 3 is a tundish into which the molten metal 4 is placed, 5 is a molten metal furnace such as a high frequency induction furnace,
Reference numeral 6 indicates a molten metal falling port, 7 indicates a powder recovery tank, and 8 indicates a metal powder. The molten metal 4 put into the tundish 3 from the high-frequency induction furnace 5 falls little by little under its own weight from the drop port 6, and high-pressure gas from the gas nozzle 2 is injected into the falling molten metal to atomize the molten metal and create metal powder. , this metal powder is collected in a powder collection tank 7.
【０００３】0003
【発明が解決しようとする課題】しかし、ガスノズルか
ら斜め下方に向けてガスが噴射されるとき、このガス流
にまわりのガスが吸引されて、ガスノズル間の空間とそ
の上方に負圧部ができ、それより下方からこの負圧部に
向ってガスの吹上げ現象が生じ、溶湯も吹上げられて安
定した金属粉末の製造ができなくなり、また落下口６を
閉塞するという問題を生じていた。[Problem to be Solved by the Invention] However, when gas is injected diagonally downward from a gas nozzle, surrounding gas is sucked into the gas flow, creating a negative pressure area in the space between the gas nozzles and above it. A phenomenon in which gas blows up from below toward this negative pressure section occurs, and the molten metal is also blown up, making it impossible to produce stable metal powder, and also causing problems in that the drop opening 6 is blocked.
【０００４】本発明は、従来生じていた、噴霧チャンバ
内での吹上げ現象を防止し、安定した金属粉末製造を行
うことのできる金属粉末製造装置を提供することを目的
とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a metal powder manufacturing apparatus that can prevent the blow-up phenomenon that has conventionally occurred in a spray chamber and can stably manufacture metal powder.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成する本発
明の金属粉末製造装置は次の装置から成る。すなわち、
噴霧チャンバにガスノズルを設け、ガスノズルの上方に
溶湯の落下口を設け、該落下口から落下する溶湯にガス
ノズルからのガスを噴射して微粒化し金属粉末を製造す
る金属粉末製造装置において、噴霧チャンバを、仕切板
によって、ガス噴射部および溶湯通過部を除き、ガスノ
ズルから上方のガスノズル室とガスノズルより下方のア
トマイズ室とに区画し、ガスノズル室とアトマイズ室と
を還流通路で連通し、該還流通路にアトマイズ室からガ
スノズル室にガスを還流せしめる送風手段を設けたこと
を特徴とする金属粉末製造装置。[Means for Solving the Problems] The metal powder manufacturing apparatus of the present invention which achieves the above object is comprised of the following apparatus. That is,
In a metal powder manufacturing apparatus, a spray chamber is provided with a gas nozzle, a molten metal falling port is provided above the gas nozzle, and a gas from the gas nozzle is injected into the molten metal falling from the falling port to atomize the metal powder to produce metal powder. The gas nozzle chamber is divided into a gas nozzle chamber above the gas nozzle and an atomization chamber below the gas nozzle, excluding the gas injection part and the molten metal passage part, by a partition plate, and the gas nozzle chamber and the atomization chamber are communicated with each other by a reflux passage, and the reflux passage is connected to the reflux passage. A metal powder manufacturing apparatus characterized by being provided with a blower means for circulating gas from an atomization chamber to a gas nozzle chamber.
【０００６】[0006]
【作用】送風手段によるガスの還流によって、ガスノズ
ル室の方がアトマイズ室より圧力が高くなっているから
、仕切板の、ガス噴射部および溶湯通路部のための開口
には、上方から下方へのガスの流れが生じている。した
がって、アトマイズ室からガスノズル室への前記開口を
通してのガスの吹上りは防止され、従来のような吹上り
による不具合は生じない。[Operation] Due to the gas reflux caused by the blowing means, the pressure in the gas nozzle chamber is higher than that in the atomization chamber. Gas flow is occurring. Therefore, gas blowing up through the opening from the atomizing chamber to the gas nozzle chamber is prevented, and problems caused by blowing up as in the conventional case do not occur.
【０００７】[0007]
【実施例】図１、図２に本発明に係る金属粉末製造装置
の望ましい実施例を示す。ただし、図３の従来例に準じ
る構造の部分には、同じ符号を付してある。噴霧チャン
バ１は、仕切板９によって上下に、すなわち、ガスノズ
ル２を含みガスノズル２から上方のガスノズル室１０と
、ガスノズル２より下方のアトマイズ室１１とに区画さ
れている。ただし、仕切板９には、ガスノズル２からの
ガス噴射部および落下口６からの溶湯４の通過部に対応
する部分に、噴射ガスおよび落下溶湯を通過させるため
の開口１２が形成されている。また、図２に示すように
、ガスノズル室１０とアトマイズ室１１とは、開口１２
とは別に、還流通路（または還流パイプ）１３によって
連通されている。還流通路１３の途中には、アトマイズ
室１１からガスノズル室１０にガスを還流せしめる送風
手段１４が設けられている。送風手段１４は、たとえば
送風機、インジェクタ等から成る。送風手段１４を制御
することにより、ガスノズル室１０の圧力Ｐ１とガスア
トマイズ室１１の圧力Ｐ２との比（Ｐ１／Ｐ２≧１）を
自在に変化させることができる。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 and 2 show a preferred embodiment of a metal powder manufacturing apparatus according to the present invention. However, the same reference numerals are given to the parts having a structure similar to that of the conventional example shown in FIG. The spray chamber 1 is divided vertically by a partition plate 9 into a gas nozzle chamber 10 that includes the gas nozzle 2 and is above the gas nozzle 2, and an atomization chamber 11 that is below the gas nozzle 2. However, in the partition plate 9, an opening 12 is formed in a portion corresponding to the gas injection part from the gas nozzle 2 and the passage part of the molten metal 4 from the falling port 6, through which the injected gas and the falling molten metal pass. Further, as shown in FIG. 2, the gas nozzle chamber 10 and the atomization chamber 11 are
Separately, they are communicated by a reflux passage (or reflux pipe) 13. A blower means 14 is provided in the middle of the reflux passage 13 for refluxing gas from the atomization chamber 11 to the gas nozzle chamber 10. The blowing means 14 includes, for example, a blower, an injector, and the like. By controlling the blowing means 14, the ratio between the pressure P1 in the gas nozzle chamber 10 and the pressure P2 in the gas atomization chamber 11 (P1/P2≧1) can be freely changed.
【０００８】ガスノズル２は高圧発生源に導管１５によ
って接続されている。また、噴霧チャンバ１はダクト１
６によって排気装置に接続される。Gas nozzle 2 is connected by a conduit 15 to a high pressure source. Also, the spray chamber 1 is connected to the duct 1
6 to the exhaust system.
【０００９】次に、作用を説明する。金属粉末の製造は
従来と同様、落下口６から溶湯４を落下させ、落下する
溶湯にガスノズル２からの噴射ガス（Ｎ２ ガス、Ａｒ
ガス等の不活性ガス）をあてて微粒化することによって
行う。溶湯は噴射ガスをあてられてアトマイズ室１１で
徐々に拡がって微粒化、固化し、金属粉末となる。この
場合、送風手段１４によって、アトマイズ室１１のガス
を還流通路１３を介してガスノズル室１０に還流させ、
ガスノズル室１０の圧力をアトマイズ室１１の圧力より
若干高くする。その結果、開口１２を通して、ガスノズ
ル室１０からアトマイズ室１１に、すなわち下方に向っ
てのガス流が生じ、従来のようなガスの吹上げ現象は生
じない。したがって当然に、吹上げられた溶湯によって
落下口６がつまるという現象も生じない。Next, the operation will be explained. The production of metal powder is similar to the conventional method, in which the molten metal 4 is dropped from the drop port 6, and the falling molten metal is injected with gas (N2 gas, Ar) from the gas nozzle 2.
This is done by applying an inert gas (e.g. gas) to atomize the particles. The molten metal is exposed to a jet gas and gradually spreads in the atomization chamber 11, becomes atomized and solidified, and becomes metal powder. In this case, the gas in the atomization chamber 11 is refluxed to the gas nozzle chamber 10 via the reflux passage 13 by the blowing means 14,
The pressure in the gas nozzle chamber 10 is made slightly higher than the pressure in the atomization chamber 11. As a result, a gas flow is generated from the gas nozzle chamber 10 to the atomization chamber 11, that is, downward, through the opening 12, and the blow-up phenomenon of gas as in the conventional case does not occur. Therefore, naturally, the phenomenon that the drop opening 6 is clogged by the blown up molten metal does not occur.
【００１０】0010
【発明の効果】本発明によれば、次の効果を得る。第１
に、ガスノズル室１０の圧力をアトマイズ室１１の圧力
より高めに設定できるので、吹上げ現象を防止でき、安
定噴霧が可能となって安定した金属粉末の製造が可能と
なり、かつ落下口のつまり等も防止できる。第２に、本
発明では、微粒化を促進するガス圧、ガス量の増大、あ
るいは噴霧角度（鉛直方向となす角）の増大など、操業
上極めて過酷な条件下でも、安定噴霧が可能となる。第
３に、上記のような効果を内部の不活性ガスを有効に利
用しつつ達成できるので、不活性ガスのコスト増大には
つながらないという利点がある。[Effects of the Invention] According to the present invention, the following effects can be obtained. 1st
In addition, since the pressure in the gas nozzle chamber 10 can be set higher than the pressure in the atomization chamber 11, blow-up phenomenon can be prevented, stable atomization is possible, stable production of metal powder is possible, and clogging of the drop opening can be prevented. can also be prevented. Second, the present invention enables stable spraying even under extremely harsh operational conditions, such as increased gas pressure and gas volume that promote atomization, or increased spray angle (angle with the vertical direction). . Thirdly, since the above effects can be achieved while effectively utilizing the internal inert gas, there is an advantage that the cost of inert gas does not increase.
【図１】本発明の一実施例に係る金属粉末製造装置の全
体断面図である。FIG. 1 is an overall sectional view of a metal powder manufacturing apparatus according to an embodiment of the present invention.
【図２】図１の装置のうち、還流通路の部分の拡大断面
図である。FIG. 2 is an enlarged sectional view of a reflux passage portion of the apparatus of FIG. 1;
【図３】従来の金属粉末製造装置の全体断面図である。FIG. 3 is an overall sectional view of a conventional metal powder manufacturing apparatus.
１ 噴霧チャンバ ２ ガスノズル ４ 溶湯 ６ 落下口 ８ 金属粉末 ９ 仕切板 １０ ガスノズル室 １１ アトマイズ室 １２ 開口 １３ 還流通路 １４ 送風手段 1 Spray chamber 2 Gas nozzle 4 Molten metal 6 Drop opening 8 Metal powder 9 Partition plate 10 Gas nozzle chamber 11 Atomization chamber 12 Opening 13 Reflux passage 14. Air blowing means
Claims (1)
スノズルの上方に溶湯の落下口を設け、該落下口から落
下する溶湯にガスノズルからのガスを噴射して微粒化し
金属粉末を製造する金属粉末製造装置において、噴霧チ
ャンバを、仕切板によって、ガス噴射部および溶湯通過
部を除き、ガスノズルから上方のガスノズル室とガスノ
ズルより下方のアトマイズ室とに区画し、ガスノズル室
とアトマイズ室とを還流通路で連通し、該還流通路にア
トマイズ室からガスノズル室にガスを還流せしめる送風
手段を設けたことを特徴とする金属粉末製造装置。1. A metal powder manufacturing apparatus that includes a gas nozzle in a spray chamber, a molten metal drop port above the gas nozzle, and injects gas from the gas nozzle onto the molten metal falling from the drop port to atomize the metal powder and produce metal powder. The atomizing chamber is divided by a partition plate into a gas nozzle chamber above the gas nozzle and an atomization chamber below the gas nozzle, excluding the gas injection section and the molten metal passage section, and the gas nozzle chamber and the atomization chamber are communicated through a reflux passage. A metal powder manufacturing apparatus, characterized in that the reflux passage is provided with a blowing means for refluxing gas from the atomization chamber to the gas nozzle chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8903591A JPH04301011A (en) | 1991-03-29 | 1991-03-29 | Device for producing metal powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8903591A JPH04301011A (en) | 1991-03-29 | 1991-03-29 | Device for producing metal powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04301011A true JPH04301011A (en) | 1992-10-23 |
Family
ID=13959642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8903591A Pending JPH04301011A (en) | 1991-03-29 | 1991-03-29 | Device for producing metal powder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04301011A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102712044A (en) * | 2009-12-15 | 2012-10-03 | 韩国机械研究院 | Production method and production device for a composite metal powder using the gas spraying method |
-
1991
- 1991-03-29 JP JP8903591A patent/JPH04301011A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102712044A (en) * | 2009-12-15 | 2012-10-03 | 韩国机械研究院 | Production method and production device for a composite metal powder using the gas spraying method |
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