JP2988193B2 - Gold electrolysis method - Google Patents
Gold electrolysis methodInfo
- Publication number
- JP2988193B2 JP2988193B2 JP5116615A JP11661593A JP2988193B2 JP 2988193 B2 JP2988193 B2 JP 2988193B2 JP 5116615 A JP5116615 A JP 5116615A JP 11661593 A JP11661593 A JP 11661593A JP 2988193 B2 JP2988193 B2 JP 2988193B2
- Authority
- JP
- Japan
- Prior art keywords
- gold
- electrolytic
- electrolyte
- nitric acid
- anode
- 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 - Lifetime
Links
Landscapes
- Electrolytic Production Of Metals (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、高純度金アノードを電
解精製する方法において、電解液中に金粉が発生しない
金電解方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for electrolytically refining a high-purity gold anode, and to a gold electrolysis method in which no gold powder is generated in an electrolytic solution.
【０００２】[0002]
【従来の技術】銅精錬の工程において、銅アノードの電
解精製により電気銅を得、この電解精製で発生する銅電
解スライムからは、セレン、鉛、ビスマス等が除去さ
れ、粗銀が得られる。この粗銀を熔解鋳造し、銀アノー
ドとして電解精製により、電気銀を得ている。2. Description of the Related Art In a copper refining process, electrolytic copper is obtained by electrolytic refining of a copper anode, and selenium, lead, bismuth, and the like are removed from copper electrolytic slime generated by the electrolytic refining to obtain coarse silver. This coarse silver is melt-cast and electrolytic silver is used as a silver anode to obtain electric silver.
【０００３】この電解精製で発生する銀電解スライム
は、銀、金、白金族等を含有しているので、硝酸及び／
又は塩酸で溶解し、銀と白金族を除去した後、熔解鋳造
して金アノードとする。一般に金アノード中の金品位は
９７〜９８重量％であり、この金アノードを陽極とし、
金板を陰極にして、塩酸を含む金電解液中で電解精製す
ることにより、金品位９９.９９重量％程度の電気金を
得ることができる。The silver electrolytic slime generated by this electrolytic refining contains silver, gold, platinum group, etc.
Alternatively, after dissolving with hydrochloric acid to remove silver and the platinum group, it is melt-cast to obtain a gold anode. Generally, the gold grade in the gold anode is 97-98% by weight, and this gold anode is used as the anode ,
By performing electrorefining in a gold electrolytic solution containing hydrochloric acid using a gold plate as a cathode, it is possible to obtain electric gold having a gold grade of about 99.99 % by weight.
【０００４】[0004]
【発明が解決しようとする課題】しかし、金品位が９
９.９９重量％以上の電気金を得るためには、例えば金
アノードの金品位を９９重量％以上の高純度にして電解
精製する必要があるが、その場合、電解精製の途中で電
解液中に金粉が発生する。この金粉により濾布の目詰あ
るいは電解液の循環系統の配管、ポンプの詰り等を生じ
るため、電解精製が中断してしまうという問題点があっ
た。However, the gold grade is 9
In order to obtain 9.9% by weight or more of electric gold, it is necessary to electrolytically purify the gold anode to a high purity of 99% by weight or more, for example. Gold powder is generated . The gold powder piping circulating system of filter cloth clogging or electrolyte by, for producing clogging of the pump, there is a problem that the electrolytic refining is interrupted.
【０００５】本発明は、上記の問題点を解決し、高純度
の金アノードを電解精製する場合でも、金電解液中に金
粉が発生しない電解方法を提供することを目的とする。It is an object of the present invention to solve the above-mentioned problems and to provide an electrolysis method in which no gold powder is generated in a gold electrolyte even when a high-purity gold anode is electrorefined.
【０００６】[0006]
【課題を解決するための手段】本発明は、高純度の金ア
ノードを塩酸を含む金電解液中で電解精製する金電解方
法において、金電解液中の硝酸基濃度が４〜７ｇ／ｌの
範囲になるように該金電解液に硝酸を添加しながら電解
することを特徴とする。SUMMARY OF THE INVENTION The present invention provides a high-purity gold alloy.
Gold electrolysis method for refining nodes in gold electrolyte containing hydrochloric acid
Electrolysis while adding nitric acid to the gold electrolyte so that the nitrate group concentration in the gold electrolyte is in the range of 4 to 7 g / l.
Characterized in that it.
【０００７】[0007]
【作用】例えば金品位が９９重量％以上の高純度金アノ
ードを使用して、電解精製すると、電解液中に塩化第一
金（ＡｕＣｌ）が発生する。この塩化第一金は電解液中
では不安定な金化合物であり、次式により安定な塩化第
二金（ＡｕＣｌ3）と金粉（Ａｕ0）に変化するものと考
えられる。 ３ＡｕＣｌ→ＡｕＣｌ3＋２Ａｕ0 [Action] For example gold quality using high purity gold anode above 99 wt%, when electrolytic refining, aurous chloride (AuCl) is that occur in the electrolytic solution. Chloride aurous This is an unstable gold compound in the electrolyte solution is considered to be changed to a stable auric chloride by the following equation (AuCl 3) gold powder (Au 0). 3AuCl → AuCl 3 + 2Au 0
【０００８】本発明では、金電解液に硝酸を添加するこ
とにより、金粉の発生をなくすことができる。硝酸の添
加によって金粉の発生がなくなるのは、一価の金イオン
を三価に酸化することに加えて、添加された硝酸と金電
解液に含まれる塩酸との相互作用によって、発生期の金
粉が直ちに溶解されるためと考えられる。 In the present invention, nitric acid is added to the gold electrolyte.
Thus, generation of gold powder can be eliminated. Add nitric acid
The addition of gold powder eliminates the generation of monovalent gold ions.
Nitric acid and gold
Interaction with hydrochloric acid contained in the lysate
This is probably because the powder was immediately dissolved.
【０００９】本発明において、金電解液中の硝酸基濃度
を４〜７ｇ／ｌの範囲とするのは、４ｇ／ｌ未満では電
解液中に金粉の析出が生じ、やがて金粉が成長して循環
系統を閉塞するからである。また、硝酸基濃度が７ｇ／
ｌを超えると、硝酸と塩酸による金の溶解作用が強すぎ
るため、陰極の吊り下げに用いる金板の吊手部分が溶解
してしまうからである。[0009] In the present invention, to a nitrate group concentration of gold electrolyte solution in the range of 4~7g / l is caused precipitation of gold powder in the electrolytic solution is less than 4g / l, eventually gold powder grows circulation Ru der from clogging the system. The nitrate group concentration was 7 g /
l, the dissolution of gold by nitric acid and hydrochloric acid is too strong
Of the metal plate used to suspend the cathode
Because it will .
【００１０】金電解液中の硝酸基は電解の進行に伴って
消費されるので、金電解液中の硝酸濃度が４〜７ｇ／ｌ
の範囲に維持されるように、硝酸を添加しながら電解を
行う必要がある。尚、硝酸基としては、硝酸のほか、硝
酸基を含む可溶性塩等の硝酸基を利用できるが、金の品
位が９９.９９重量％以上の電気金を得るには硝酸が好
ましい。[0010] Since the nitrate group in the gold electrolyte is consumed with the progress of electrolysis, the concentration of nitric acid gold electrolyte 4~7g / l
While adding nitric acid to maintain the
Need to do . As the nitric acid group, a nitric acid group such as a soluble salt containing a nitric acid group can be used in addition to nitric acid. However, nitric acid is preferable for obtaining electric gold having a gold grade of 99.99% by weight or more.
【００１１】[0011]
【実施例】実施例 電解槽中の 金電解液（Ａｕ：１００ｇ／ｌ、Ｆ・ＨＣ
ｌ：４０ｇ／ｌ、Ｐｔ：０.５ｇ／ｌ、Ｐｄ：０.５ｇ／
ｌ、Ａｇ：０.０１ｇ／ｌ）６５０リットルに、硝酸
（６２重量％）４リットルを添加し、よく混合した後、
金電解液中に金アノード（Ａｕ品位：９９.５重量％）
２４０ｋｇを吊込んだ。この金電解液に直流電流を
（正）２００Ａ、（負）５０Ａの割合で流し、電解精製
を行った。【Example】Example In the electrolytic cell Gold electrolyte (Au:100g / l, F ・ HC
l:40 g / l, Pt:0.5 g / l, Pd: 0.5 g /
l, Ag:0.01g / l) to 650 liters,nitric acid
(62% by weight) After adding 4 liters and mixing well,
MoneyGold anode (Au grade) in electrolyte:99.5% by weight)
240kg was suspended.This gold electrolyteDC current
(Positive) 200A, (Negative) Flow at a rate of 50A, electrolytic purification
Was done.
【００１２】電解精製する間、硝酸（６２重量％）を
１.３ｍｌ／分の割合で添加しつづけ、金電解液中の硝
酸基濃度を４〜７ｇ／ｌの範囲でコントロールした。電
解精製終了後、配管ポンプ等の循環系統を確認したとこ
ろ、金粉が付着してできる金箔は発生していなかった。During electrolytic refining, nitric acid (62% by weight) was continuously added at a rate of 1.3 ml / min, and the concentration of nitrate groups in the gold electrolyte was controlled in the range of 4 to 7 g / l. After the completion of the electrolytic refining , the circulation system such as a piping pump was confirmed. As a result, no gold foil to which gold powder had adhered was generated.
【００１３】比較例 金電解液中の硝酸基濃度 を３ｇ／１とした以外は上記実
施例と同様に電解精製を行ったところ、電解槽のオーバ
ーフロー出口及び配管の曲部に金粉が付着してできた金
箔が発生していた。また、硝酸基濃度を８ｇ／ｌとした
以外は上記実施例と同様に電解精製を行ったところ、陰
極の吊り下げに用いる金板の吊手部分が一部溶解した。[0013]Comparative example Nitrate concentration in gold electrolyte Except 3 g / 1Is the above
Electrolytic purification as in the exampleWhere I went,Electrolytic tank over
ー In the curved part of flow outlet and pipingGold powder attachedMoney
Foil is generatedWas. Also,Nitrate concentrationTo 8 g / l
Other thanPerforms electrolytic refining in the same manner as in the above example.I went there, Yin
veryFor hangingPart of the hanging part of the metal plate used meltsdid.
【００１４】[0014]
【発明の効果】本発明によれば、金電解液中に金粉が発
生することがなく、このため金粉による濾布の目詰や循
環系統の閉塞がなくなり、高純度金アノードの電解精製
が可能になる。According to the present invention, there is no possibility that gold dust is generated in the gold electrolyte solution, filter cloth clogging and that due to this reason gold powder 循
The blockage of the ring system is eliminated , and the electrolytic purification of the high-purity gold anode becomes possible.
Claims (1)
液中で電解精製する金電解方法において、金電解液中の
硝酸基濃度が４〜７ｇ／ｌの範囲になるように該金電解
液に硝酸を添加しながら電解することを特徴とする金電
解方法。1. A gold electrolysis comprising hydrochloric acid containing a high-purity gold anode.
In a gold electrolysis method for electrorefining in a solution, the gold electrolysis is performed such that the concentration of nitrate groups in the gold electrolyte is in the range of 4 to 7 g / l.
A gold electrolysis method comprising electrolyzing while adding nitric acid to a solution .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5116615A JP2988193B2 (en) | 1993-04-21 | 1993-04-21 | Gold electrolysis method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5116615A JP2988193B2 (en) | 1993-04-21 | 1993-04-21 | Gold electrolysis method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06306671A JPH06306671A (en) | 1994-11-01 |
| JP2988193B2 true JP2988193B2 (en) | 1999-12-06 |
Family
ID=14691572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5116615A Expired - Lifetime JP2988193B2 (en) | 1993-04-21 | 1993-04-21 | Gold electrolysis method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2988193B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2021329906A1 (en) | 2020-08-18 | 2023-04-27 | Enviro Metals, LLC | Metal refinement |
-
1993
- 1993-04-21 JP JP5116615A patent/JP2988193B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06306671A (en) | 1994-11-01 |
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