JP2533916Y2 - Electrode plate for electrolytic recovery from precious metal electropolishing wastewater - Google Patents

Electrode plate for electrolytic recovery from precious metal electropolishing wastewater

Info

Publication number
JP2533916Y2
JP2533916Y2 JP12544990U JP12544990U JP2533916Y2 JP 2533916 Y2 JP2533916 Y2 JP 2533916Y2 JP 12544990 U JP12544990 U JP 12544990U JP 12544990 U JP12544990 U JP 12544990U JP 2533916 Y2 JP2533916 Y2 JP 2533916Y2
Authority
JP
Japan
Prior art keywords
electrode plate
electrolytic recovery
electropolishing
electrolytic
precious metal
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.)
Expired - Fee Related
Application number
JP12544990U
Other languages
Japanese (ja)
Other versions
JPH0481968U (en
Inventor
静男 生野
幹人 上條
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.)
Yamanashi Prefecture
Original Assignee
Yamanashi Prefecture
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 Yamanashi Prefecture filed Critical Yamanashi Prefecture
Priority to JP12544990U priority Critical patent/JP2533916Y2/en
Publication of JPH0481968U publication Critical patent/JPH0481968U/ja
Application granted granted Critical
Publication of JP2533916Y2 publication Critical patent/JP2533916Y2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Description

【考案の詳細な説明】 [産業上の利用分野] この考案は貴金属電解研磨廃液から貴金属を金−銀合
金(金87%、銀13%)として電解回収するとともに、析
出した貴金属を箔状に剥離することによって非常に作業
性よく回収できる貴金属電解研磨廃液からの電解回収用
電極板に関するものである。
[Detailed description of the invention] [Industrial application field] This invention electrolytically recovers a noble metal from a noble metal electropolishing wastewater as a gold-silver alloy (87% gold, 13% silver) and converts the deposited noble metal into a foil. The present invention relates to an electrode plate for electrolytic recovery from waste precious metal electropolishing waste liquid which can be recovered with excellent workability by peeling.

[従来の技術] 従来、例えば貴金属製品の電解研磨加工を行う工場な
どでは、電解研磨廃液からそのなかに含まれている金
を、例えば還元剤(亜鉛末等)を加えてたの貴金属と共
に沈殿させ、これを再び王水に溶解した後、更に亜硫酸
ナトリウム等の還元剤を使用して還元固化して回収して
いた。
[Prior art] Conventionally, for example, in a factory for performing electropolishing of precious metal products, gold contained in electropolishing waste liquid is precipitated together with a noble metal to which a reducing agent (such as zinc dust) is added, for example. This was again dissolved in aqua regia and then reduced and solidified using a reducing agent such as sodium sulfite to recover.

[考案が解決しようとする問題点] しかしながら、上記の回収手段では貴金属以外の卑金
属も共沈する上、それらの卑金属の除去をしなければな
らなく、また金が粉末状に析出するためにその後の取扱
いに手間がかかるという欠点があった。
[Problems to be Solved by the Invention] However, in the above-mentioned recovery means, base metals other than noble metals are co-precipitated, and these base metals must be removed. There is a drawback that it takes time to handle.

また電解回収して箔状のものを得ようとすることも考
えられるが、従来の電極板では析出した金が剥離しにく
かったり、また剥離しやすいときには鱗片状に小さく剥
れて電解槽中に脱落してしまって非常に回収効率が悪か
った。
It is also conceivable to try to obtain a foil by electrolytic recovery, but in the conventional electrode plate, the deposited gold is difficult to peel off, or when it is easy to peel off, when it is easily peeled, it is peeled off in a small scale like an electrolytic cell. It was dropped and the collection efficiency was very poor.

この考案は、従来例の以上の欠点を解消しようとする
もので、析出した金銀合金が電極板から簡単に剥離する
ことができ、しかもきれいな箔状で効率よく回収できる
貴金属電解研磨廃液からの電解回収用電極板を提供しよ
うとするものである。
This invention is intended to solve the above-mentioned disadvantages of the conventional example, and the deposited gold-silver alloy can be easily peeled off from the electrode plate, and can be efficiently recovered in a clean foil form from the precious metal electropolishing waste liquid. It is intended to provide a collecting electrode plate.

[問題点を解決するための手段] 即ち、この考案の貴金属電解研磨廃液からの電解回収
用電極板は、鏡面仕上げしたステンレス板の表面を陽極
酸化した後、酸と接触させ、酸化被膜を形成したことを
特徴とするものである。
[Means for Solving the Problems] That is, the electrode plate for electrolytic recovery from the noble metal electropolishing waste liquid of the present invention is formed by anodizing the surface of a mirror-finished stainless steel plate and then contacting with an acid to form an oxide film. It is characterized by having done.

[作用] この考案に係る貴金属電解研磨廃液からの電解回収用
電極板は、以上のように鏡面仕上げしたステンレス板の
表面を陽極酸化したのち酸と接触させ、酸化被膜を形成
したので、析出した金を電極板から簡単に剥がすことが
でき、しかもきれいな箔状で効率よく回収することがで
きる。
[Effect] The electrode plate for electrolytic recovery from the noble metal electropolishing waste liquid according to the present invention was precipitated because the surface of the mirror-finished stainless steel plate was anodized and then contacted with acid to form an oxide film. Gold can be easily peeled off from the electrode plate, and can be efficiently recovered in a clean foil form.

[実施例] 次に、この考案に係る貴金属電解研磨廃液からの電解
回収用電極板の一実施例を図面に基いて説明する。
[Example] Next, an example of an electrode plate for electrolytic recovery from a noble metal electropolishing waste liquid according to the present invention will be described with reference to the drawings.

第1図において、1は電解回収装置を示すものであ
る。この電解回収装置1は、電源や循環ポンプ、直流積
算電流計などを備えた制御部11、電解槽12、および複数
の室に区分され、液量に応じて使用する室の数を増減さ
せられるようにした貯槽13とで構成されている。
In FIG. 1, reference numeral 1 denotes an electrolytic recovery device. The electrolytic recovery apparatus 1 is divided into a control unit 11 having a power supply, a circulating pump, a DC integrating ammeter, and the like, an electrolytic cell 12, and a plurality of chambers, and the number of chambers used can be increased or decreased according to the amount of liquid. And a storage tank 13 as described above.

上記循環ポンプは、制御部11、電解槽12および貯槽13
間に配設した配管系14を介して電解液を強制的に循環さ
せるようになっている。
The circulation pump includes a control unit 11, an electrolytic tank 12, and a storage tank 13.
The electrolytic solution is forcibly circulated through a piping system 14 disposed therebetween.

電解槽12は、第2図に示すように、槽の下部に設けた
供給口21から電解液を供給され、上部に設けた排出口22
から貯槽13に回送される。槽内には所定の間隔で電極板
23が垂直に吊り下げられている。
As shown in FIG. 2, the electrolytic cell 12 is supplied with an electrolytic solution from a supply port 21 provided at a lower part of the cell and a discharge port 22 provided at an upper part thereof.
From the tank 13. Electrode plates at predetermined intervals in the tank
23 are suspended vertically.

上記電極板23としては、第3図に示すように、表面を
鏡面仕上げしたステンレス板31が使用される。
As the electrode plate 23, as shown in FIG. 3, a stainless steel plate 31 whose surface is mirror-finished is used.

表−1は、電極板として使用されるステンレス(本願
考案の電極)とインバー合金(従来の電極)との電析金
属の純度および剥離性を比較したものである。
Table 1 compares the purity and releasability of electrodeposited metal between stainless steel (electrode of the present invention) used as an electrode plate and an invar alloy (conventional electrode).

なお、表−1の本願考案実施例の電極は、以下のよう
にして作成したものである。
In addition, the electrode of this invention invention Example of Table 1 was produced as follows.

鏡面仕上したステンレス(SUS304)板表面に、陽極酸
化液として苛性ソーダ200g/を使用し、電圧10V、処理
時間10分で陽極酸化したのち、塩酸:水=1:4からなる
酸と20〜30秒間接触させ、酸化被膜を形成した。
Anodize caustic soda 200g / as anodizing solution on the mirror-finished stainless steel (SUS304) plate surface, anodize with voltage 10V, treatment time 10 minutes, then acid with hydrochloric acid: water = 1: 4 and acid for 20-30 seconds Contact was made to form an oxide film.

表−2は、電極板としてステンレスを使用したとき
(実施例)の電析金属の状態および剥離性を比較したも
のである。
Table 2 compares the state of the deposited metal and the peelability when stainless steel was used as the electrode plate (Example).

なお、表−2の本願考案実施例の電極は、以下のよう
にして作成したものである。
The electrodes of the present invention in Table 2 were prepared as follows.

鏡面仕上げしたステンレス板表面に、陽極酸化液とし
て苛性ソーダ200g/を使用し、電圧10V、処理時間10分
で陽極酸化したのち、塩酸:水=1:4からなる酸と30秒
間接触させ、酸化被膜を形成した。
The surface of the mirror-finished stainless steel plate was anodized using caustic soda 200g / as an anodizing solution at a voltage of 10 V for a treatment time of 10 minutes. Was formed.

表−2は、電極板としてステンレスを使用したとき
(実施例)の電析金属の状態および剥離性を比較したも
のである。
Table 2 compares the state of the deposited metal and the peelability when stainless steel was used as the electrode plate (Example).

また表−3は、ステンレス板の表面粗さと剥離性との
関係を示すものである。
Table 3 shows the relationship between the surface roughness of the stainless steel plate and the releasability.

*表−3中の「♯500」とは、かなり粗いメッシュを示
す。
* "$ 500" in Table 3 indicates a fairly coarse mesh.

*「♯1500」とは、細かい部類のメッシュを示す。* “♯1500” indicates a fine class of mesh.

*「青棒」とは鏡面研磨可能な研磨材を示す。* "Blue stick" indicates an abrasive that can be mirror-polished.

ところで以上の実験中、鏡面仕上して陽極酸化したも
のにおいてはきれいに剥れるものの、電解回収時に鱗片
状に小さく剥れて電解槽中に脱落してしまって非常に回
収効率が悪いという欠点のあることが判明した。そこで
この考案においては、鏡面仕上したステンレス板31の表
面を陽極酸化したのち酸と接触させ、適度に酸化被膜32
を形成したものである。
By the way, during the above experiment, although the mirror-finished and anodized one peels off neatly, it has a drawback that the recovery efficiency is very poor because it is peeled off in small scales and dropped into the electrolytic cell during electrolytic recovery. It has been found. Therefore, in the present invention, the surface of the mirror-finished stainless steel plate 31 is anodized, and then brought into contact with an acid to form an oxide film 32 appropriately.
Is formed.

ちなみに上記陽極酸化液としては苛性ソーダ200g/
とし、電圧10V、処理時間は10分が望ましい。
By the way, caustic soda 200g /
Preferably, the voltage is 10 V and the processing time is 10 minutes.

上記酸は例えば塩酸:水=1:4が望ましく、また上記
酸で処理する時間は20〜30秒が適当である。
The acid is preferably, for example, hydrochloric acid: water = 1: 4, and the treatment time with the acid is suitably 20 to 30 seconds.

このとき形成される酸化皮膜の厚さは、0.1〜50μ程
度である。
The thickness of the oxide film formed at this time is about 0.1 to 50 μm.

上記処理によって得られた酸化被膜32を有する電極板
23は、析出した金が電極板23から簡単に剥がすことがで
き、しかもきれいな箔状で効率よく回収できるものであ
った。
Electrode plate having oxide film 32 obtained by the above processing
In No. 23, the deposited gold could be easily peeled off from the electrode plate 23, and could be efficiently recovered in a clean foil form.

[考案の効果] この考案に係る貴金属電解研磨廃液からの電解回収用
電極板は、以上のように鏡面仕上げしたステンレス板の
表面を陽極酸化したのち酸と接触させ、適度に酸化被膜
を形成したので、析出した金が電極板から簡単に剥がす
ことができ、しかもきれいな箔状で効率よく回収でき
る。
[Effects of the Invention] The electrode plate for electrolytic recovery from the noble metal electropolishing waste liquid according to the present invention formed a moderately oxidized film by anodizing the surface of the stainless steel plate mirror-finished as described above and then contacting it with acid. Therefore, the deposited gold can be easily peeled off from the electrode plate, and can be efficiently recovered in a clean foil form.

また、電極板の加工にもあまり手間がかからないの
で、全体として低コストで金を電解回収することができ
る。
Further, since it does not take much time to process the electrode plate, gold can be electrolytically recovered at low cost as a whole.

【図面の簡単な説明】[Brief description of the drawings]

第1図は電解回収装置の斜視図、第2図は電解槽の斜視
図、第3図はこの考案の貴金属電解研磨廃液からの電解
回収用電極板の一実施例を示す断面図である。 1…電解回収装置、11…制御部 12…電解槽、13…貯槽 14…配管系、21…供給口 22…排出口、23…電極板 31…ステンレス板、32…酸化被膜
1 is a perspective view of an electrolytic recovery apparatus, FIG. 2 is a perspective view of an electrolytic cell, and FIG. 3 is a cross-sectional view showing an embodiment of an electrode plate for electrolytic recovery from a noble metal electropolishing waste liquid of the present invention. DESCRIPTION OF SYMBOLS 1 ... Electrolysis recovery apparatus, 11 ... Control part 12 ... Electrolysis tank, 13 ... Storage tank 14 ... Piping system, 21 ... Supply port 22 ... Exhaust port, 23 ... Electrode plate 31 ... Stainless steel plate, 32 ... Oxide film

Claims (1)

(57)【実用新案登録請求の範囲】(57) [Scope of request for utility model registration] 【請求項1】鏡面仕上げをしたステンレス板の表面を陽
極酸化した後、酸と接触させて酸化被膜を形成したこと
を特徴とする貴金属電解研磨廃液からの電解回収用電極
板。
1. An electrode plate for electrolytic recovery from electropolishing waste liquid, characterized in that a mirror-finished stainless steel plate is anodized on its surface and then contacted with an acid to form an oxide film.
JP12544990U 1990-11-27 1990-11-27 Electrode plate for electrolytic recovery from precious metal electropolishing wastewater Expired - Fee Related JP2533916Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12544990U JP2533916Y2 (en) 1990-11-27 1990-11-27 Electrode plate for electrolytic recovery from precious metal electropolishing wastewater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12544990U JP2533916Y2 (en) 1990-11-27 1990-11-27 Electrode plate for electrolytic recovery from precious metal electropolishing wastewater

Publications (2)

Publication Number Publication Date
JPH0481968U JPH0481968U (en) 1992-07-16
JP2533916Y2 true JP2533916Y2 (en) 1997-04-30

Family

ID=31873048

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12544990U Expired - Fee Related JP2533916Y2 (en) 1990-11-27 1990-11-27 Electrode plate for electrolytic recovery from precious metal electropolishing wastewater

Country Status (1)

Country Link
JP (1) JP2533916Y2 (en)

Also Published As

Publication number Publication date
JPH0481968U (en) 1992-07-16

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