JPS61131364A - Method of manufacturing negative electrode zinc powder for alkaline battery - Google Patents

Method of manufacturing negative electrode zinc powder for alkaline battery

Info

Publication number
JPS61131364A
JPS61131364A JP59251679A JP25167984A JPS61131364A JP S61131364 A JPS61131364 A JP S61131364A JP 59251679 A JP59251679 A JP 59251679A JP 25167984 A JP25167984 A JP 25167984A JP S61131364 A JPS61131364 A JP S61131364A
Authority
JP
Japan
Prior art keywords
zinc
mercury
negative electrode
melting
zinc powder
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
JP59251679A
Other languages
Japanese (ja)
Inventor
Kazuo Furushima
古嶋　和夫
Kazumasa Yoshida
和正 吉田
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.)
FDK Twicell Co Ltd
Original Assignee
Toshiba Battery 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 Toshiba Battery Co Ltd filed Critical Toshiba Battery Co Ltd
Priority to JP59251679A priority Critical patent/JPS61131364A/en
Publication of JPS61131364A publication Critical patent/JPS61131364A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
    • H01M4/42—Alloys based on zinc
    • 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

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)

Abstract

PURPOSE:To eliminate the complicated processes of crushing, washing and drying etc. by melting zinc or zinc alloy and mercury, and carrying out the hardening of zinc during the melting by spraying. CONSTITUTION:An electrozinc ingot and metal mercury are charged in a melting furnace, and are sealed and heated to make the molten zinc which is mixed with mercury and zinc. The molten zinc is transferred to another heating furnace which has a fine hole in the bottom, and it is dropped with a thin stream from the fine hole of a furnace bottom portion in a workroom which is interrupted and closed from the outside at the same time the molten zinc is sprayed by exposing a high speed air jet to make negative electrode zinc powder. The oxygen density in the air is set to the range of 1vol% to 0.01% to reduce the generation of mercury oxide in the spraying process. It is possible to safely carry out the work without scattering mercury vapor to the outside.

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明は水酸化カリウムまたは水酸化ナトリウム等のア
ルカリ電解液を用いるアルカリ電池に使・　用する負極
亜鉛粉末の製造方法に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for producing negative electrode zinc powder for use in alkaline batteries using an alkaline electrolyte such as potassium hydroxide or sodium hydroxide.

［従来の技術］ 従来のアルカリ電池用負極亜鉛粉末は溶融状態の亜鉛に
水銀を加えて冷却粉砕して亜鉛粉末とすることが特公昭
２７−４３６１号公報に示されている。また亜鉛粉末を
可溶性水銀塩を含む酸性溶液に亜鉛粉末を加えて氷化し
、その後に洗浄および乾燥等の工程を経て製造すること
が例えば特公昭３７−８３１１号公報に示されている。[Prior Art] Japanese Patent Publication No. 27-4361 discloses that a conventional negative electrode zinc powder for alkaline batteries is prepared by adding mercury to molten zinc and cooling and pulverizing the resulting zinc powder. Further, for example, Japanese Patent Publication No. 37-8311 discloses that zinc powder is produced by adding zinc powder to an acidic solution containing a soluble mercury salt, freezing it, and then performing washing and drying steps.

［発明が解決しようとする問題点１ 従来挟術による氷化亜鉛粉末は粉砕や、氷化させる工程
と洗浄、乾燥の後処理工程など煩雑な工程を必要として
いた。[Problem to be Solved by the Invention 1] Conventionally, icing zinc powder produced by a pinching process requires complicated processes such as pulverization, icing steps, and post-treatment steps of washing and drying.

［問題点を解決するための手段］ 本発明では、亜鉛または亜鉛合金と水銀とを溶融機噴霧
することによって、溶融中に亜鉛の氷化がおこなわれる
ので、従来技術における粉砕や洗浄、乾燥等の煩雑な工
程を必要とせず製造工程を簡略化できる。[Means for Solving the Problems] In the present invention, by spraying zinc or zinc alloy and mercury with a melter, the zinc freezes during melting. The manufacturing process can be simplified without the need for complicated processes.

［作用］ 本発明では溶融亜鉛を噴霧して負極亜鉛粉末とするため
、製造工程での噴流気体の循環系別を閉塞した状態にし
ておくことにより水銀蒸気が外部に飛散せず安全に作業
が出来る。[Function] In the present invention, molten zinc is sprayed to form negative electrode zinc powder, so by keeping the jet gas circulation system closed during the manufacturing process, mercury vapor does not scatter outside and work can be done safely. I can do it.

また、酸素濃度は通常の空気中に含まれる濃度の２０Ｖ
ＯＩ％でも空気中による酸素によって水銀が酸化水銀に
一部変化するが、アルカリ電池に使用した場合にはアル
カリ電解液により表面の酸化水銀は溶解するので電池性
能上の影響はない。In addition, the oxygen concentration is 20V, which is the concentration contained in normal air.
Even at OI%, mercury partially changes to mercury oxide due to oxygen in the air, but when used in an alkaline battery, the mercury oxide on the surface is dissolved by the alkaline electrolyte, so there is no effect on battery performance.

なお、とくに好ましい酸素濃度としては、１ｖｏｔ％な
いし０．０１％の範囲にすれば噴霧工程での酸化水銀の
生成が減少するので好ましい。空気および窒素やアルゴ
ンの不活性ガスと空気とを混合して酸素濃度を低下すれ
ばよい。Note that a particularly preferable oxygen concentration is in the range of 1 vot% to 0.01%, since this reduces the production of mercury oxide during the spraying process. The oxygen concentration may be reduced by mixing air and an inert gas such as nitrogen or argon.

［実施例］ 以下本発明の実施例について説明する。[Example] Examples of the present invention will be described below.

実施例　（１） 純度９９．９９％の電気亜鉛インゴット１００重量部、
金属水銀５重量部を秤量して溶融炉に投入し、密閉した
のち温度４５０〜５５０℃に加熱して水銀と亜鉛とが混
合した溶融亜鉛とする。溶融した亜鉛は底部に細孔をも
つ別の加熱炉に移し、外部と遮断閉塞した作業室で炉底
部の細孔より細流滴下すると同時に高速空気噴流（酸素
濃度２０ｖｏ１％）に当て溶融亜鉛噴霧して負糧亜鉛粉
末とする。Example (1) 100 parts by weight of electrolytic zinc ingot with a purity of 99.99%,
5 parts by weight of metallic mercury is weighed and put into a melting furnace, which is sealed and then heated to a temperature of 450 to 550°C to form molten zinc in which mercury and zinc are mixed. The molten zinc is transferred to another heating furnace with pores at the bottom, and in a closed working chamber isolated from the outside, a small trickle is dripped through the pores at the bottom of the furnace, and at the same time it is exposed to a high-speed air jet (oxygen concentration 20VO1%) to spray molten zinc. It is made into negative food zinc powder.

実施例　■ 純度９９．９９％の電気亜鉛のインゴット１００重量部
、金属水！１５重量部ならびに鉛０．１重量部とを秤量
し溶融炉に投入し、実施例（１）と同じ温度で加熱して
溶融亜鉛合金としたのち、溶融した亜鉛合金は底部に細
孔をもつ別の加熱炉に移し、実施例（１）に記載の閉塞
作業室で炉底部の細孔より細流滴下と同時に酸素濃度１
ｖｏｌ％の窒素ガス高速噴流を当て溶融合金を噴霧して
負極亜鉛とする。Example ■ 100 parts by weight of electrolytic zinc ingot with a purity of 99.99%, metallic water! 15 parts by weight and 0.1 parts by weight of lead were weighed and put into a melting furnace, heated at the same temperature as in Example (1) to form a molten zinc alloy, and the molten zinc alloy had pores at the bottom. Transferred to another heating furnace, and at the same time the oxygen concentration was 1
A high-speed jet of vol% nitrogen gas is applied to spray the molten alloy to form negative electrode zinc.

［作用効果］ 本発明では溶融噴霧時における水銀蒸気の°外部飛散や
、洗浄、乾燥の後処理工程など煩雑な工程を必要としな
いアルカリ電池用の負極亜鉛の製造方法を毘供できるも
のである。[Operation and Effect] The present invention can provide a method for producing negative electrode zinc for alkaline batteries that does not require complicated steps such as external scattering of mercury vapor during melt spraying or post-treatment steps of washing and drying. .

Claims (2)

【特許請求の範囲】[Claims] （１）亜鉛または亜鉛合金と、水銀とを溶融したのち噴
霧することを特徴とするアルカリ電池用負極亜鉛粉末の
製造方法。(1) A method for producing negative electrode zinc powder for alkaline batteries, which comprises melting zinc or zinc alloy and mercury and then spraying. （２）前記噴霧が酸素濃度１ｖｏｌ％以下の雰囲気中に
おいておこなうことを特徴とする特許請求の範囲第１項
記載によるアルカリ電池用亜鉛粉末の製造方法。(2) The method for producing zinc powder for alkaline batteries according to claim 1, wherein the spraying is performed in an atmosphere with an oxygen concentration of 1 vol% or less.
JP59251679A 1984-11-30 1984-11-30 Method of manufacturing negative electrode zinc powder for alkaline battery Pending JPS61131364A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59251679A JPS61131364A (en) 1984-11-30 1984-11-30 Method of manufacturing negative electrode zinc powder for alkaline battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59251679A JPS61131364A (en) 1984-11-30 1984-11-30 Method of manufacturing negative electrode zinc powder for alkaline battery

Publications (1)

Publication Number Publication Date
JPS61131364A true JPS61131364A (en) 1986-06-19

Family

ID=17226396

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59251679A Pending JPS61131364A (en) 1984-11-30 1984-11-30 Method of manufacturing negative electrode zinc powder for alkaline battery

Country Status (1)

Country Link
JP (1) JPS61131364A (en)

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