JP2002047505A - Manufacturing method of zinc or zinc alloy powder for battery - Google Patents
Manufacturing method of zinc or zinc alloy powder for batteryInfo
- Publication number
- JP2002047505A JP2002047505A JP2000228033A JP2000228033A JP2002047505A JP 2002047505 A JP2002047505 A JP 2002047505A JP 2000228033 A JP2000228033 A JP 2000228033A JP 2000228033 A JP2000228033 A JP 2000228033A JP 2002047505 A JP2002047505 A JP 2002047505A
- Authority
- JP
- Japan
- Prior art keywords
- zinc
- zinc alloy
- battery
- molten
- spray
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電池用亜鉛又は亜
鉛合金粉末の製造方法に関し、詳しくは微粉化され、か
つ安定した品質を有し電池に配したときにガス発生が抑
制され、しかも良好な収率をもって量産可能な電池用亜
鉛又は亜鉛合金粉末の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing zinc or zinc alloy powder for a battery, and more particularly, to a method for producing a fine powder, having a stable quality, suppressing gas generation when disposed in a battery, and improving the quality The present invention relates to a method for producing zinc or zinc alloy powder for batteries which can be mass-produced with a high yield.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】従来よ
り電池用、特にアルカリ電池用負極活物質として用いら
れる亜鉛又は亜鉛合金粉末の製造には、高圧空気又は不
活性ガスで亜鉛又は亜鉛合金溶湯を噴霧する高圧アトマ
イズ法が用いられている。2. Description of the Related Art Conventionally, zinc or zinc alloy powder used as a negative electrode active material for batteries, particularly for alkaline batteries, has been produced by using high-pressure air or an inert gas to melt zinc or zinc alloy. A high-pressure atomizing method of spraying water is used.
【０００３】この従来の高圧アトマイズ法は、まず亜鉛
又は亜鉛合金原料を溶融炉に投入して溶融し、溶湯とす
る。次に、この溶湯を所定量滴下させ、この滴下された
溶湯流に対して直角方向に噴霧媒体をノズル先端開口部
より噴射して上記溶湯を噴霧化し、得られる粉末を回収
するものである。ここに用いられるノズルの先端開口部
の断面形状は円状又は環状が一般的であり、また噴霧媒
体としては空気が用いられていた。このようにして得ら
れる亜鉛又は亜鉛合金粉末は、粒径が２０〜２００メッ
シュの範囲にあるものが７５重量％前後であった。In the conventional high-pressure atomizing method, first, a zinc or zinc alloy raw material is charged into a melting furnace and melted to form a molten metal. Next, a predetermined amount of the molten metal is dropped, and a spray medium is jetted from the opening at the nozzle tip in a direction perpendicular to the flow of the dropped molten metal to atomize the molten metal and collect the obtained powder. The cross-sectional shape of the tip opening of the nozzle used here is generally circular or annular, and air has been used as the spray medium. Of the zinc or zinc alloy powder thus obtained, those having a particle size in the range of 20 to 200 mesh were around 75% by weight.
【０００４】しかし、最近のデジタル化の急速な発展に
伴って、アルカリ電池のさらなるハイレート化の要請が
高まっており、このため亜鉛又は亜鉛合金粉末において
も、微粉化による活性化の向上や電池に配したときにガ
ス発生が抑制され安定した品質が求められ、このような
要求特性を満足する亜鉛又は亜鉛合金粉末の量産化が可
能な製造方法が求められていた。However, with the rapid development of digitalization in recent years, there has been an increasing demand for higher-rate alkaline batteries. For this reason, zinc and zinc alloy powders have been improved in their activation by pulverization and have been used for batteries. Gas distribution is suppressed when the components are arranged, stable quality is required, and a production method capable of mass-producing zinc or zinc alloy powder satisfying such required characteristics has been required.
【０００５】従って、本発明の目的は、微粉化され、か
つ安定した品質を有し電池に配したときにガス発生が抑
制され、しかも良好な収率をもって量産可能な電池用亜
鉛又は亜鉛合金粉末の製造方法を提供することにある。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a zinc or zinc alloy powder for a battery which can be mass-produced in a fine powder, has stable quality, suppresses gas generation when disposed in a battery, and has a good yield. It is to provide a manufacturing method of.
【０００６】[0006]
【課題を解決するための手段】本発明者らは、検討の結
果、亜鉛又は亜鉛合金粉末の高圧アトマイズ法におい
て、ノズルを複数本互いに平行に配置し、ノズル先端開
口部の断面形状及び噴霧圧力を特定し、かつ噴霧される
噴霧室内を正圧とすることによって、上記目的が達成し
得ることを知見した。As a result of the study, the present inventors have found that, in the high-pressure atomization method of zinc or zinc alloy powder, a plurality of nozzles are arranged in parallel with each other, and the sectional shape of the nozzle tip opening and the spray pressure. It has been found that the above object can be achieved by specifying the pressure and making the spray chamber to be sprayed a positive pressure.
【０００７】本発明は、上記知見に基づいてなされたも
ので、 溶湯亜鉛又は亜鉛合金を滴下して溶湯流とな
し、該溶湯流に対して直角方向に、噴霧媒体をノズル先
端開口部より噴射して上記溶湯亜鉛又は亜鉛合金を噴霧
化する電池用亜鉛又は亜鉛合金粉末の製造方法であっ
て、上記ノズルが複数本互いに平行に配置され、かつ該
ノズル先端開口部の断面形状がＶ字状、Ｕ字状又は円弧
状であり、上記噴霧媒体が空気又は不活性ガスからな
り、噴霧圧力が４〜９ｋｇ／ｃｍ2であり、上記溶湯亜
鉛又は亜鉛合金が噴霧化される噴霧室内が正圧に保持さ
れている、ことを特徴とする電池用亜鉛又は亜鉛合金粉
末の製造方法を提供するものである。The present invention has been made on the basis of the above-described findings, and a molten zinc or zinc alloy is dropped to form a molten metal stream, and a spray medium is injected from a nozzle tip opening in a direction perpendicular to the molten metal stream. A method for producing zinc or zinc alloy powder for a battery in which the molten zinc or zinc alloy is atomized, wherein a plurality of the nozzles are arranged in parallel with each other, and the cross-sectional shape of the nozzle tip opening is V-shaped. , U-shaped or arc-shaped, the spray medium is air or inert gas, the spray pressure is 4 to 9 kg / cm 2 , and the spray chamber in which the molten zinc or the zinc alloy is atomized has a positive pressure. And a method for producing a zinc or zinc alloy powder for a battery.
【０００８】[0008]
【発明の実施の形態】以下、本発明の実施の形態につい
て図面に基づいて説明する。Embodiments of the present invention will be described below with reference to the drawings.
【０００９】図１は、本発明の製造方法によつて、亜鉛
又は亜鉛合金溶湯流をノズルからの噴霧媒体流によって
噴霧粉末とする状態を示す断面図である。図１におい
て、１は溶湯流、２はノズル、３は噴霧媒体流、４は噴
霧粉末をそれぞれ示す。FIG. 1 is a cross-sectional view showing a state in which a zinc or zinc alloy melt is formed into spray powder by a spray medium flow from a nozzle according to the production method of the present invention. In FIG. 1, 1 indicates a molten metal flow, 2 indicates a nozzle, 3 indicates a spray medium flow, and 4 indicates a spray powder.
【００１０】亜鉛又は亜鉛合金（以下、場合により亜鉛
と総称する）原料を溶融炉に投入して溶融することより
得られる溶湯亜鉛は、一定の細孔より所定量滴下され、
溶湯流１とされる。[0010] Molten zinc obtained by charging a zinc or zinc alloy (hereinafter sometimes collectively referred to as zinc) raw material into a melting furnace and melting is dropped in a predetermined amount from a predetermined pore.
The molten metal stream 1 is used.
【００１１】この溶湯流１に対して直角方向に、噴霧媒
体をノズル２の先端開口部より噴射して噴霧媒体流３を
形成し、上記亜鉛溶湯を噴霧化して噴霧亜鉛粉末（アト
マイズ亜鉛粉末）４とする。A spray medium is jetted from the opening at the tip of the nozzle 2 in a direction perpendicular to the molten metal stream 1 to form a spray medium stream 3, and the zinc melt is atomized to spray zinc powder (atomized zinc powder). 4 is assumed.
【００１２】ここで用いられる噴霧媒体としては、空気
や窒素ガス、アルゴンガス等の不活性ガスが用いられ
る。また、噴霧圧力は４〜９ｋｇ／ｃｍ2 であること
が、高い収率で、微粉化された粉末を得る上で必要であ
る。噴霧圧力が４ｋｇ／ｃｍ2 未満では、噴霧圧力が低
いため、溶湯量が通常なら、噴霧乱れが多く収率が悪く
なり、９ｋｇ／ｃｍ2 を超えると、噴霧圧力が高いため
噴霧品は非常に細かくなり、安定的に噴霧するにはノズ
ル位置の調整等が難しくなる。As the spraying medium used here, air, an inert gas such as a nitrogen gas or an argon gas is used. Further, the spray pressure is required to be 4 to 9 kg / cm 2 in order to obtain a fine powder with a high yield. When the spray pressure is less than 4 kg / cm 2 , the spray pressure is low, so that when the amount of the molten metal is normal, the spray turbulence is large and the yield is poor. When the spray pressure exceeds 9 kg / cm 2 , the spray pressure is high and the spray product is very poor. It becomes difficult to adjust the nozzle position and the like for fine and stable spraying.
【００１３】本発明に用いられるノズル先端２開口部の
断面形状は、Ｖ字状２ａ（図２参照）、Ｕ字状３ｂ（図
３参照）又は円弧状２ｃ（図４参照）であることが必要
である。このようなノズル２を用いることによって、溶
湯を噴霧する際の湯滴の生成が極めて少ないため、噴霧
亜鉛粉末４の微粉化が達成される。The sectional shape of the opening of the nozzle tip 2 used in the present invention may be V-shaped 2a (see FIG. 2), U-shaped 3b (see FIG. 3) or arc-shaped 2c (see FIG. 4). is necessary. By using such a nozzle 2, since the generation of droplets when the molten metal is sprayed is extremely small, pulverization of the sprayed zinc powder 4 is achieved.
【００１４】また、図５に示されるように、ノズル２は
複数本、好ましくは３〜４本互いに平行に配置されるこ
とが必要である。さらには、同一平面上に３〜４本互い
に平行に配置されることが好ましい。このようにノズル
２を複数本平行に配置することによって、効率的に、ま
た安定した状態で噴霧品の量産が容易に実施可能とな
る。As shown in FIG. 5, a plurality of nozzles 2, preferably three to four nozzles 2, must be arranged in parallel with each other. Furthermore, it is preferable that three or four pieces are arranged in parallel on the same plane. By arranging a plurality of nozzles 2 in parallel in this way, it is possible to easily and efficiently perform mass production of sprayed products in a stable state.
【００１５】さらに、溶湯亜鉛が噴霧化され、噴霧亜鉛
粉末４とされる噴霧室７内は、高性能のフィルター６を
通して清浄な空気を導入して正圧に維持されている。こ
のように噴霧室内を正圧に保ち、クリーン度を向上させ
ることによって、噴霧亜鉛粉末４への不純物の混入が防
止され、この亜鉛粉末を電池に配したときのガス発生が
抑制される。なお、図５において、５はチャンバーを示
す。Further, the interior of the spray chamber 7 in which the molten zinc is atomized to be spray zinc powder 4 is maintained at a positive pressure by introducing clean air through a high-performance filter 6. As described above, by keeping the spray chamber at a positive pressure and improving the cleanness, contamination of the sprayed zinc powder 4 with impurities is prevented, and gas generation when the zinc powder is disposed in the battery is suppressed. In FIG. 5, reference numeral 5 denotes a chamber.
【００１６】このようにして得られた亜鉛粉末は、−２
００メッシュのものが２０〜７０重量％であり、微粉化
が達成される。また、亜鉛粉末への不純物の混入がない
ため、安定した品質を有し電池に配したときにガス発生
が抑制される。さらに、良好な収率を有するため量産が
可能となる。[0016] The zinc powder thus obtained is
The content of the 00 mesh is 20 to 70% by weight, and pulverization is achieved. Further, since no impurities are mixed into the zinc powder, gas generation is suppressed when the battery has a stable quality and is arranged in a battery. Furthermore, since it has a good yield, mass production becomes possible.
【００１７】[0017]
【実施例】以下、実施例に基づいて本発明を具体的に説
明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on embodiments.
【００１８】〔実施例１〕下記噴霧条件によって、溶湯
亜鉛を噴霧した。その結果は、下記の通りであった。Example 1 Molten zinc was sprayed under the following spray conditions. The results were as follows.
【００１９】 ＜噴霧条件＞ ・Ｖ字状ノズル ；両翼の開き（度） ６０ ・噴霧媒体 空気 噴霧圧力 （ｋｇ／ｃｍ2 ）６．８ ・溶湯亜鉛の噴霧時温度（℃） ４９０〜５００ ・溶湯亜鉛の流下位置（ノズルに対し） 直角 ・滴下溶湯亜鉛とノズル先端との距離 （ｍｍ）３５〜４０ ・噴霧室内 ；圧力 正圧<Spray conditions> V-shaped nozzle; opening of both wings (degree) 60 Spray medium Air Spray pressure (kg / cm 2 ) 6.8 Spray temperature of molten zinc (° C) 490-500 Melt Zinc flow down position (with respect to nozzle) Right angle ・ Distance between molten zinc dripping and nozzle tip (mm) 35-40 ・ Spray chamber; pressure Positive pressure
【００２０】 ＜噴霧成績＞ ・溶湯亜鉛の滴下量（ｋｇ／ｍｉｎ） ２５ ・−２００メッシュ亜鉛粉末の収率（重量％） ４０ ・−２００メッシュ亜鉛粉末の生産量（ｋｇ／ｍｉｎ） ８<Spraying results>-Drop amount of molten zinc (kg / min) 25-Yield of -200 mesh zinc powder (% by weight) 40-Production amount of -200 mesh zinc powder (kg / min) 8
【００２１】[0021]
【発明の効果】本発明の製造方法によって、微粉化さ
れ、かつ安定した品質を有し電池に配したときにガス発
生が抑制される亜鉛又は亜鉛合金粉末が、良好な収率を
もって量産できる。According to the production method of the present invention, zinc or zinc alloy powder that is finely divided, has stable quality, and suppresses gas generation when disposed in a battery can be mass-produced with a good yield.
【図１】図１は、本発明の製造方法によつて、亜鉛又は
亜鉛合金溶湯流をノズルからの噴霧媒体流によって噴霧
粉末とする状態を示す断面図である。FIG. 1 is a cross-sectional view showing a state in which a molten zinc or zinc alloy is formed into a spray powder by a spray medium flow from a nozzle according to a production method of the present invention.
【図２】図２は、本発明に用いられるＶ字状のノズル先
端開口部の断面図である。FIG. 2 is a sectional view of a V-shaped nozzle tip opening used in the present invention.
【図３】図３は、本発明に用いられるＵ字状のノズル先
端開口部の断面図である。FIG. 3 is a sectional view of a U-shaped nozzle tip opening used in the present invention.
【図４】図４は、本発明に用いられる円弧状のノズル先
端開口部の断面図である。FIG. 4 is a sectional view of an arc-shaped nozzle tip opening used in the present invention.
【図５】図５は、本発明の製造方法に用いられる噴霧室
の平面図である。FIG. 5 is a plan view of a spray chamber used in the manufacturing method of the present invention.
１；溶湯流 ２；ノズル ２ａ、２ｂ、２ｃ；ノズル先端開口部 ３；噴霧媒体流 ４；噴霧（亜鉛）粉末 ５；チャンバー ６；フィルター ７；噴霧室 Reference Signs List 1: melt flow 2: nozzle 2a, 2b, 2c; nozzle tip opening 3: spray medium flow 4: spray (zinc) powder 5; chamber 6; filter 7; spray chamber
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小田原 忠良 山口県下関市彦島西山町２−８−７ Ｆターム(参考） 4K017 AA04 BA01 CA07 DA01 EB10 EB13 EB15 FA11 FA15 5H050 AA19 BA04 CB13 GA06 GA27 GA30 HA15 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tadayoshi Odawara 2-8-7 Nishiyamacho, Hikoshima, Shimonoseki-shi, Yamaguchi F-term (reference) 4K017 AA04 BA01 CA07 DA01 EB10 EB13 EB15 FA11 FA15 5H050 AA19 BA04 CB13 GA06 GA27 GA30 HA15
Claims (3)
となし、該溶湯流に対して直角方向に、噴霧媒体をノズ
ル先端開口部より噴射して上記溶湯亜鉛又は亜鉛合金を
噴霧化する電池用亜鉛又は亜鉛合金粉末の製造方法であ
って、上記ノズルが複数本互いに平行に配置され、かつ
該ノズル先端開口部の断面形状がＶ字状、Ｕ字状又は円
弧状であり、上記噴霧媒体が空気又は不活性ガスからな
り、噴霧圧力が４〜９ｋｇ／ｃｍ2であり、上記溶湯亜
鉛又は亜鉛合金が噴霧化される噴霧室内が正圧に保持さ
れている、ことを特徴とする電池用亜鉛又は亜鉛合金粉
末の製造方法。1. A molten zinc or zinc alloy is dropped to form a molten metal stream, and a spray medium is injected from a nozzle tip opening in a direction perpendicular to the molten metal stream to atomize the molten zinc or zinc alloy. A method for producing zinc or zinc alloy powder for a battery, wherein a plurality of the nozzles are arranged in parallel with each other, and the cross-sectional shape of the nozzle tip opening is V-shaped, U-shaped or arc-shaped, A battery comprising: a medium comprising air or an inert gas; a spray pressure of 4 to 9 kg / cm 2 ; and a spray chamber in which the molten zinc or zinc alloy is atomized is maintained at a positive pressure. For producing zinc or zinc alloy powder for use.
されている請求項１記載の電池用亜鉛又は亜鉛合金粉末
の製造方法。2. The method for producing zinc or zinc alloy powder for a battery according to claim 1, wherein three to four nozzles are arranged in parallel with each other.
ガスである請求項１又は２記載の電池用亜鉛又は亜鉛合
金粉末の製造方法。3. The method for producing zinc or zinc alloy powder for a battery according to claim 1, wherein the inert gas is nitrogen gas or argon gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000228033A JP2002047505A (en) | 2000-07-28 | 2000-07-28 | Manufacturing method of zinc or zinc alloy powder for battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000228033A JP2002047505A (en) | 2000-07-28 | 2000-07-28 | Manufacturing method of zinc or zinc alloy powder for battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002047505A true JP2002047505A (en) | 2002-02-15 |
Family
ID=18721401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000228033A Pending JP2002047505A (en) | 2000-07-28 | 2000-07-28 | Manufacturing method of zinc or zinc alloy powder for battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002047505A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6746509B2 (en) * | 2002-09-11 | 2004-06-08 | Mitsui Mining & Smelting Company, Ltd. | Process for producing zinc or zinc alloy powder for battery |
| JP2008541390A (en) * | 2005-05-19 | 2008-11-20 | ユミコア | Alloyed zinc powder with perforated particles for alkaline batteries |
| KR101404348B1 (en) | 2005-05-19 | 2014-06-09 | 유미코르 | Alloyed zinc powders with pierced particles for alkaline batteries |
-
2000
- 2000-07-28 JP JP2000228033A patent/JP2002047505A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6746509B2 (en) * | 2002-09-11 | 2004-06-08 | Mitsui Mining & Smelting Company, Ltd. | Process for producing zinc or zinc alloy powder for battery |
| JP2008541390A (en) * | 2005-05-19 | 2008-11-20 | ユミコア | Alloyed zinc powder with perforated particles for alkaline batteries |
| KR101404348B1 (en) | 2005-05-19 | 2014-06-09 | 유미코르 | Alloyed zinc powders with pierced particles for alkaline batteries |
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