JP2006233317A - Recovering method of gold - Google Patents

Recovering method of gold Download PDF

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Publication number
JP2006233317A
JP2006233317A JP2005053661A JP2005053661A JP2006233317A JP 2006233317 A JP2006233317 A JP 2006233317A JP 2005053661 A JP2005053661 A JP 2005053661A JP 2005053661 A JP2005053661 A JP 2005053661A JP 2006233317 A JP2006233317 A JP 2006233317A
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JP
Japan
Prior art keywords
gold
organic phase
concentration
hydrochloric acid
scrubbing
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
JP2005053661A
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Japanese (ja)
Inventor
Norimasa Otsuka
教正 大塚
Yoshifumi Abe
吉史 安部
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Nikko Kinzoku KK
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Nikko Kinzoku KK
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Priority to JP2005053661A priority Critical patent/JP2006233317A/en
Publication of JP2006233317A publication Critical patent/JP2006233317A/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

Abstract

<P>PROBLEM TO BE SOLVED: To easily recover high-purity gold in larger quantities without prolonging the length of operating time while obviating the necessity of a major modification to existing facilities. <P>SOLUTION: The method for recovering gold from a gold-containing leachate after chloride leaching includes steps of: subjecting the gold-containing leachate after chloride leaching to solvent extraction using dibutyl carbitol (DBC); scrubbing the resultant gold-containing organic phase with hydrochloric acid; and adding an aqueous solution of a reducing agent to it to reduce gold. In the above method for recovering gold, in the case where hydrochloric acid of 0.25 to 3N concentration is used for scrubbing, gold concentration in the organic phase is controlled to a prescribed value to form an aqueous phase in the upper part and the organic phase in the lower part. By this method, increase treatment of gold can be attained. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、金含有塩化浸出後液からの金の回収方法に関するも
のである。
The present invention relates to a method for recovering gold from a solution after leaching with gold.

電解精製時に生ずるアノードスライム中には、金や銀などの
有価金属が濃縮しているため、これらスライムからの有価金属毎
の分離回収が求められている。
金に着目すると、現在実施されている回収方法の一つは、
J.E.Hoffmannの著した文献
”Hydrometallurgical proceeding
of Kennecott
Refinery slimes”(Proceedings of COPPER 95−
COBRE 95
International Conference Volume III−
Electrorefining
and Hydrometallurgy of Copper,The
Metallurgical
Society of CIM)(非特許文献1)に記載されてい
る。
この方法は、脱銅スライムを塩化浸出することにより得られた
金含有浸出後液を出発原料液として、これを、(1) ジブチルカル
ビトール(DBC)を用いて溶媒抽出し、(2) 得られた金含有有
機相を塩酸でスクラビングし、そして、(3)それに還元剤の水溶
液を添加して金を還元する各工程を含むものである。
In the anode slime produced at the time of electrolytic purification, valuable metals such as gold and silver are concentrated. Therefore, separation and recovery of each valuable metal from these slimes is required.
Focusing on gold, one of the collection methods currently in use is
Literature written by JEHoffmann “Hydrometallurgical proceeding”
of Kennecott
Refinery slimes ”(Proceedings of COPPER 95−
COBRE 95
International Conference Volume III−
Electrorefining
and Hydrometallurgy of Copper, The
Metallurgical
Society of CIM) (Non-Patent Document 1).
In this method, a gold-containing post-leaching solution obtained by leaching de-copperized slime was used as a starting material solution, and this was subjected to solvent extraction using (1) dibutyl carbitol (DBC) to obtain (2) The resulting gold-containing organic phase is scrubbed with hydrochloric acid, and (3) an aqueous solution of a reducing agent is added thereto to reduce the gold.

ジブチルカルビトールは、安定で、低揮発性でしかも低毒性の
溶媒であり、塩化物含有水溶液からの金の溶媒抽出には好適な溶
媒である。有機相と水溶液相との間の金の分配係数は、約100
0〜3000であり、これを使用して2段溶媒抽出を実施すれば、
金は99mass%有機相へ移るものと考えられている。
なお、金含有浸出後液に関しては、塩酸濃度が0.5〜3N程
度のものを使用している。塩化浸出の効率を良くし、かつ、溶媒
抽出の際に不純物の溶媒への混入を許容できる程度に阻止できる
からである。
工程(1)で得られた金含有有機相を、工程(2)で、塩酸を
使用してスクラビングするのは、セレン、テルル、ヒ素、アンチ
モン及びビスマス等が金と共に抽出されているからである。
通常は、0.25〜3Nの塩酸を使用して、バッチ式又は連続
式の多段向流スクラビングを実施している。
金は、DBC相と水溶液相との間の分配係数が高いので逆抽出
は行わず、工程(3)で、還元剤の水溶液を用いて直接還元する
ことにより金属金を得ている。シュウ酸は、金を高純度で回収で
きる最も良い還元剤として大部分の場合に使用されている。
Dibutyl carbitol is a stable, low volatility and low toxicity solvent, and is a suitable solvent for solvent extraction of gold from chloride-containing aqueous solutions. The gold partition coefficient between the organic and aqueous phases is about 100.
0 to 3000, and if this is used to perform two-stage solvent extraction,
Gold is thought to move into the 99 mass% organic phase.
As for the gold-containing leached solution, a solution having a hydrochloric acid concentration of about 0.5 to 3N is used. This is because the efficiency of leaching with chloride can be improved, and impurities can be prevented from being mixed into the solvent at the time of solvent extraction.
The reason why the gold-containing organic phase obtained in step (1) is scrubbed using hydrochloric acid in step (2) is that selenium, tellurium, arsenic, antimony, bismuth and the like are extracted together with gold. .
Usually, 0.25 to 3N hydrochloric acid is used to carry out batch or continuous multistage counter-current scrubbing.
Since gold has a high partition coefficient between the DBC phase and the aqueous solution phase, back extraction is not performed, and metal gold is obtained by direct reduction using an aqueous solution of a reducing agent in step (3). Oxalic acid is used in most cases as the best reducing agent that can recover gold with high purity.

従来の方法では、例えば特許第3079035号公報(特許文
献1)によれば、DBCによる金の溶媒抽出における有機相中の
金濃度はおおよそ50g/L程度とすると開示されている。
In the conventional method, for example, according to Japanese Patent No. 3079035 (Patent Document 1), it is disclosed that the gold concentration in the organic phase in the solvent extraction of gold by DBC is about 50 g / L.

また、特許第3087758号公報(特許文献2)によれば、
DBCによる金の溶媒抽出において、抽出できる金濃度の上限は、
金を抽出した有機相と水相の密度が等しくなる点であるとし、有
機相中の金濃度を85g/L以下に維持することと開示されてい
る。
According to Japanese Patent No. 3087758 (Patent Document 2),
In gold solvent extraction with DBC, the upper limit of gold concentration that can be extracted is
It is disclosed that the density of the organic phase from which gold is extracted is equal to the density of the aqueous phase, and that the gold concentration in the organic phase is maintained at 85 g / L or less.

上記の方法では、金の生産量が有機相の液量により制限される
ため、金の増処理を行いたい場合は、系内の有機相の液量を増加
させるほかにないという問題点があった。
In the above method, the amount of gold produced is limited by the amount of liquid in the organic phase. Therefore, if it is desired to increase the amount of gold, there is no other way than increasing the amount of organic phase in the system. It was.

J.E.Hoffmann著 ”Hydrometallurgical proceeding ofKennecott Refinery slimes”(Proceedings of COPPER 95−COBRE95 International Conference Volume III−Electrorefiningand Hydrometallurgy of Copper,The MetallurgicalSociety of CIM)“Hydrometallurgical proceeding of Kennecott Refinery slimes” by J.E.Hoffmann (Proceedings of COPPER 95−COBRE95 International Conference Volume III−Electrorefining and Hydrometallurgy of Copper, The Metallurgical Society of CIM) 特許第3079035号公報Japanese Patent No. 3079035 特許第3087758号公報Japanese Patent No. 3087758

それゆえ、本発明は、より多量の高純度の金を、既存設備の
大幅な改造を必要とせずに、簡便でかつ操作時間を長くすること
なく回収できる方法を提供することを目的とする。
Therefore, an object of the present invention is to provide a method capable of recovering a larger amount of high-purity gold simply and without increasing the operation time without requiring significant modification of existing facilities.

(1) 金含有塩化浸出後液をジブチルカルビトール(DBC)
を用いて溶媒抽出し、得られた金含有有機相を塩酸でスクラビン
グした後、それに還元剤の水溶液を添加して金を還元する各工程
を含む、金含有塩化浸出後液からの金の回収方法において、
スクラビングに0.25〜3Nの濃度の塩酸を使用する場合に、
有機相中の金濃度を所定の濃度に調整することで、上部に水相、
下部に有機相を形成させることにより、金の増処理を実現する金の回
収方法。
(1) Dibutyl carbitol (DBC) after leaching with gold
Recovery of gold from the solution after leaching with gold, including steps of reducing the gold by adding an aqueous solution of a reducing agent to the gold-containing organic phase after scrubbing the resulting gold-containing organic phase with hydrochloric acid In the method
When using hydrochloric acid with a concentration of 0.25 to 3N for scrubbing,
By adjusting the gold concentration in the organic phase to a predetermined concentration,
A gold recovery method that realizes an increase in gold by forming an organic phase at the bottom.

(2)上記(1)記載の スクラビング時の塩酸濃度を0.2
5Nに調整し、有機相中の金濃度を67g/L以上にする金の回
収方法。
(3)上記(1)記載の スクラビング時の塩酸濃度を0.2
5より高く〜0.5N以下に調整し、有機相中の金濃度を74g
/L以上にする金の回収方法。
(4)上記(1)記載の スクラビング時の塩酸濃度を0.5
より高い〜1.5N以下に調整し、有機相中の金濃度を92g/
L以上にする金の回収方法。
(2) The hydrochloric acid concentration during scrubbing as described in (1) above is 0.2.
A method for recovering gold, which is adjusted to 5 N so that the gold concentration in the organic phase is 67 g / L or more.
(3) The hydrochloric acid concentration during scrubbing according to (1) above is 0.2.
Adjust to higher than 5 to 0.5N or lower, and the gold concentration in the organic phase is 74g.
/ L or more gold recovery method.
(4) The hydrochloric acid concentration during scrubbing according to (1) above is 0.5.
Adjusted to a higher level of ~ 1.5 N or lower, and the gold concentration in the organic phase was 92 g /
How to recover gold to L or more.

(5)上記(1)記載の スクラビング時の塩酸濃度を1.5
より高く〜2.25N以下に調整し、有機相中の金濃度を101
g/L以上にする金の回収方法。
(6)上記(1)記載の スクラビング時の塩酸濃度を2.2
5より高く〜3N以下に調整し、有機相中の金濃度を109g/
L以上にする金の回収方法。
を提供する。
(5) The hydrochloric acid concentration during scrubbing according to (1) above is 1.5.
Adjust higher to ~ 2.25N or less, and adjust the gold concentration in the organic phase to 101
A method for recovering gold to at least g / L.
(6) The hydrochloric acid concentration during scrubbing described in (1) above is 2.2.
Adjust the gold concentration in the organic phase to 109 g /
How to recover gold to L or more.
I will provide a.

上記発明により、
(1)より多量の高純度の金を、既存設備の大幅な改造を必要
とせずに、簡便でかつ操作時間を長くすることなく回収すること
ができる。
(2)金の生産量が有機相の液量により制限されることなく、
従来法と比べて、少なくとも2倍量以上の金の増処理が可能であ
る。
According to the above invention,
(1) A larger amount of high-purity gold can be recovered easily and without increasing the operation time without requiring significant modification of existing equipment.
(2) Gold production is not limited by the amount of organic phase,
Compared with the conventional method, it is possible to increase the amount of gold at least twice as much.

以下本発明を詳細に説明する。
金含有塩化浸出後液を溶媒抽出する前に、その塩酸濃度を0.
5〜3Nに予め調整する。
例えば、3N程度の塩酸を用いて脱銅スライムを塩化浸出して
得た金含有塩化浸出後液の場合には、水を追加して調整すればよ
い。
The present invention will be described in detail below.
Prior to solvent extraction of the gold-containing chloride leaching solution, the hydrochloric acid concentration is reduced to 0. 0.
Pre-adjust to 5-3N.
For example, in the case of a gold-containing post-chlorination leaching solution obtained by leaching decopperized slime using about 3N hydrochloric acid, water may be added for adjustment.

金抽出工程は、金含有塩化浸出液からDBC(ジブチルカルビ
トール(C49OC242O)を使用して、金のみを溶媒に抽出
する工程である。
DBCは金(HAuCl4ないしはAuCl3)と化合物を作り
やすいため、水溶液から金を抽出することができる。
抽出は1段でも2段以上でもよい。抽出後のDBC中の金濃度
はO/A比(有機相/水相)にて調整する。
スクラビング時の塩酸濃度を0.25Nに調整する場合、有機
相中の金濃度を67g/L以上とする。
0.25より高く〜0.5N以下に調整する場合、有機相中の
金濃度を74g/L以上とする。
0.5より高く〜1.5N以下に調整する場合、有機相中の金
濃度を92g/L以上とする。
1.5より高く〜2.25N以下に調整する場合、有機相中の
金濃度を101g/L以上とする。
また、2.25より高く〜3N以下に調整する場合、有機相中
の金濃度を109g/Lとする。
抽出におけるDBC中の金濃度の上限は、金含有塩化浸出液の
塩酸濃度が3Nの場合に170g/Lであった。従来、85g/
Lが上限とされていたことから、少なくとも2倍量の金の増処理
が可能である。
The gold extraction step is a step of extracting only gold from a gold-containing chloride leachate using DBC (dibutyl carbitol (C 4 H 9 OC 2 H 4 ) 2 O) into a solvent.
Since DBC can easily form a compound with gold (HAuCl 4 or AuCl 3 ), gold can be extracted from an aqueous solution.
The extraction may be one stage or two or more stages. The gold concentration in DBC after extraction is adjusted by the O / A ratio (organic phase / water phase).
When adjusting the hydrochloric acid concentration during scrubbing to 0.25 N, the gold concentration in the organic phase is set to 67 g / L or more.
When adjusting to be higher than 0.25 and not higher than 0.5N, the gold concentration in the organic phase is set to 74 g / L or higher.
When adjusting to be higher than 0.5 and not higher than 1.5N, the gold concentration in the organic phase is set to 92 g / L or higher.
In the case of adjusting to higher than 1.5 to ≦ 2.25 N, the gold concentration in the organic phase is set to 101 g / L or higher.
Moreover, when adjusting to higher than 2.25 and -3N or less, the gold concentration in an organic phase shall be 109 g / L.
The upper limit of the gold concentration in DBC in the extraction was 170 g / L when the hydrochloric acid concentration of the gold-containing chloride leachate was 3N. Conventionally, 85g /
Since L is the upper limit, it is possible to increase the amount of gold at least twice.

抽出後のDBCは、水溶液や沈殿物が極微量存在し、最終的に
製品金の品質の悪化やバラツキの原因となるため、遠心分離機等
によって、上記不純物等をDBCから除去する。
The DBC after extraction contains a very small amount of aqueous solution and precipitate, which ultimately causes deterioration in quality and variation of the product gold. Therefore, the impurities and the like are removed from the DBC by a centrifuge or the like.

DBCに微量抽出されたFe等の不純物を除去するため、0.
25〜3Nの濃度の塩酸を用いてスクラビングを行う。
多段スクラビングは連続式でもバッチ式でも、また、並流でも
向流でもよいが、好ましくは、連続向流式で実施する。
さらに、遠心分離とろ過を実施することにより、有機相(DB
C相)に混入している不純物を取り去ることができる。
In order to remove impurities such as Fe extracted in a small amount in DBC, 0.
Scrub with hydrochloric acid at a concentration of 25-3N.
Multi-stage scrubbing may be continuous or batch, and may be co-current or counter-current, but is preferably carried out in continuous counter-current.
Furthermore, by carrying out centrifugation and filtration, the organic phase (DB
Impurities mixed in (Phase C) can be removed.

従来法ではスクラビング時において、上部に有機相、下部にス
クラビング液相を形成させることにより実施していた。
本方法では、上部にスクラビング液相、下部に有機相が形成す
ることが特徴である。そのため、例えばミキサーセトラーを用いる
場合、セトラー部のオーバーフローからスクラビング液相、底抜
きから有機相を抜き出すように配管を切り替えて実施する。
In the conventional method, at the time of scrubbing, an organic phase is formed on the upper part and a scrubbing liquid phase is formed on the lower part.
This method is characterized by the formation of a scrubbing liquid phase at the top and an organic phase at the bottom. For this reason, for example, when using a mixer settler, the piping is switched so as to extract the scrubbing liquid phase from the overflow of the settler portion and the organic phase from the bottom.

金還元槽では、シュウ酸水溶液とDBCとを混合することによ
りDBC中の金を直接還元する。
還元金と水溶液は真空濾過し、還元金は洗浄、乾燥を経て溶解、
鋳造により金インゴット又は金ショットとして製品化する。
還元剤としては、シュウ酸および/もしくはシュウ酸ナトリウ
ムが好ましい。
金の還元処理は、例えば、一段バッチ法で、濃度が20〜50
g/Lで温度が70〜90℃の還元剤の水溶液を用いて、1〜3
時間程度処理することにより実施できる。
なお、塩酸濃度が高い場合にはシュウ酸の代わりに又はその一
部としてシュウ酸ナトリウムを使用する。金粉末は容器の底に沈
降する。
従って、沈降した金粉末を洗浄、乾燥することにより、製品に
できる。
In the gold reduction tank, gold in the DBC is directly reduced by mixing the oxalic acid aqueous solution and the DBC.
Reduced gold and aqueous solution are vacuum filtered, and reduced gold is dissolved after washing and drying.
Commercialized as a gold ingot or gold shot by casting.
As the reducing agent, oxalic acid and / or sodium oxalate is preferable.
The gold reduction treatment is, for example, a one-stage batch method with a concentration of 20 to 50.
Using an aqueous solution of a reducing agent having a temperature of 70 to 90 ° C. at g / L,
It can be implemented by processing for about an hour.
When the hydrochloric acid concentration is high, sodium oxalate is used instead of or as part of oxalic acid. The gold powder settles to the bottom of the container.
Therefore, the precipitated gold powder can be made into a product by washing and drying.

以下実施例1を具体的に説明する。
脱銅スライムを塩化浸出することにより得られた金含有浸出後
液を出発原料液として、溶媒抽出する前に、水を加えてその塩酸
濃度を1.5Nに予め調整し、金濃度7.5g/Lの抽出前液を
得た。
抽出前液の液量は、表1に示すように、抽出後のDBC中の金
濃度を所定濃度にするために、有機相/水相を変えて調整する。
ここで、有機相が、上部に位置した場合は、O/Aと表示し、有
機相が、下部に位置した場合は、A/Oにより表示する。
30mLのDBCを用いて各有機相と水相の比にて、金を抽出
した。抽出には、分液ろうとを用い、振盪時間15分、相分離時
間30分とした。
金含有有機相(2)〜(6)を表1に示すように、0.25N
の濃度の塩酸を用い、分液ろうとを使用して、有機相と水相の比
=1/1にて、振盪時間30分、相分離時間30分としてスクラ
ビングしたところ、上部にスクラビング液相、下部に有機相が形
成された。
比較例1は、金含有有機相(1)を実施例1と同様に処理した
ところ、上部に有機相、下部にスクラビング液相が形成された。
Example 1 will be specifically described below.
The gold-containing post-leaching solution obtained by leaching copper-free slime is used as a starting raw material solution, and before solvent extraction, water is added to adjust the hydrochloric acid concentration to 1.5 N in advance to obtain a gold concentration of 7.5 g. / L pre-extraction solution was obtained.
As shown in Table 1, the amount of the pre-extraction solution is adjusted by changing the organic phase / aqueous phase so that the gold concentration in the DBC after extraction becomes a predetermined concentration.
Here, when the organic phase is positioned at the top, it is displayed as O / A, and when the organic phase is positioned at the bottom, it is displayed by A / O.
Gold was extracted using 30 mL of DBC at a ratio of each organic phase to aqueous phase. For extraction, a separatory funnel was used, with a shaking time of 15 minutes and a phase separation time of 30 minutes.
As shown in Table 1, the gold-containing organic phases (2) to (6) were 0.25 N
Using a separating funnel with a concentration of hydrochloric acid, the mixture was scrubbed at a ratio of the organic phase to the aqueous phase = 1/1 with a shaking time of 30 minutes and a phase separation time of 30 minutes. An organic phase was formed at the bottom.
In Comparative Example 1, when the gold-containing organic phase (1) was treated in the same manner as in Example 1, an organic phase was formed in the upper portion and a scrubbing liquid phase was formed in the lower portion.

以下実施例2を説明する。金含有有機相(3)〜(6)を表1
に示すようにスクラビングを0.5Nの濃度の塩酸を用いたこと
以外は、実施例1と同様に処理したところ、上部にスクラビング
液相、下部に有機相が形成された。
比較例2は、金含有有機相(1)、(2)を実施例2と同様に処
理したところ、上部に有機相、下部にスクラビング液相が形成さ
れた。
Example 2 will be described below. Table 1 shows gold-containing organic phases (3) to (6).
As shown in Fig. 2, scrubbing was carried out in the same manner as in Example 1 except that hydrochloric acid having a concentration of 0.5 N was used. As a result, a scrubbing liquid phase was formed at the top and an organic phase was formed at the bottom.
In Comparative Example 2, when the gold-containing organic phases (1) and (2) were treated in the same manner as in Example 2, an organic phase was formed in the upper portion and a scrubbing liquid phase was formed in the lower portion.

以下実施例3を説明する。金含有有機相(4)〜(6)を表1
に示すようにスクラビングを1.5Nの濃度の塩酸を用いたこと
以外は、実施例1と同様に処理したところ、上部にスクラビング
液相、下部に有機相が形成された。
比較例3は、金含有有機相(1)〜(3)を実施例3と同様に
処理したところ、上部に有機相、下部にスクラビング液相が形成
された。
Example 3 will be described below. Table 1 shows gold-containing organic phases (4) to (6).
As shown in Fig. 2, scrubbing was carried out in the same manner as in Example 1 except that hydrochloric acid having a concentration of 1.5 N was used. As a result, a scrubbing liquid phase was formed in the upper part and an organic phase was formed in the lower part.
In Comparative Example 3, when the gold-containing organic phases (1) to (3) were treated in the same manner as in Example 3, an organic phase was formed in the upper portion and a scrubbing liquid phase was formed in the lower portion.

以下実施例4を説明する。金含有有機相(5)、(6)を表1に
示すようにスクラビングを2.25Nの濃度の塩酸を用いたこと
以外は、実施例1と同様に処理したところ、上部にスクラビング
液相、下部に有機相が形成された。
比較例4は、金含有有機相(1)〜(4)を実施例4と同様に
処理したところ、上部に有機相、下部にスクラビング液相が形成
された。
Example 4 will be described below. As shown in Table 1, the gold-containing organic phases (5) and (6) were processed in the same manner as in Example 1 except that hydrochloric acid having a concentration of 2.25N was used. An organic phase was formed at the bottom.
In Comparative Example 4, when the gold-containing organic phases (1) to (4) were treated in the same manner as in Example 4, an organic phase was formed in the upper portion and a scrubbing liquid phase was formed in the lower portion.

以下実施例5を説明する。金含有有機相(6)を表1に示すよ
うにスクラビングを3Nの濃度の塩酸を用いたこと以外は、実施
例1と同様に処理したところ、上部にスクラビング液相、下部に
有機相が形成された。
比較例5は、金含有有機相(1)〜(5)を実施例5と同様に
処理したところ、上部に有機相、下部にスクラビング液相が形成
された。
Example 5 will be described below. As shown in Table 1, the gold-containing organic phase (6) was processed in the same manner as in Example 1 except that hydrochloric acid having a concentration of 3N was used. As a result, a scrubbing liquid phase was formed at the top and an organic phase was formed at the bottom. It was done.
In Comparative Example 5, when the gold-containing organic phases (1) to (5) were treated in the same manner as in Example 5, an organic phase was formed in the upper part and a scrubbing liquid phase was formed in the lower part.

実施例と比較例の結果を比較したものが表1である。この表か
ら、本発明の範囲に含まれる態様の実施により、より多量の高純
度の金を、既存設備の大幅な改造を必要とせずに、簡便でかつ操
作時間を長くすることなく回収することができることがわかる。













Table 1 compares the results of Examples and Comparative Examples. From this table, by carrying out the embodiments included in the scope of the present invention, a larger amount of high-purity gold can be recovered easily and without increasing the operation time without requiring significant modification of existing equipment. You can see that













Claims (6)

金含有塩化浸出後液をジブチルカルビトール(D
BC)を用いて溶媒抽出し、得られた金含有有機相を塩酸でスク
ラビングした後、それに還元剤の水溶液を添加して金を還元する
各工程を含む、金含有塩化浸出後液からの金の回収方法において、
スクラビングに0.25〜3Nの濃度の塩酸を使用する場合に、
有機相中の金濃度を所定の濃度に調整することで、上部に水相、
下部に有機相を形成させることにより、金の増処理を実現するこ
とを特徴とする金の回収方法。
After leaching the gold-containing chloride, dibutyl carbitol (D
BC), and the gold-containing organic phase obtained is scrubbed with hydrochloric acid and then added with an aqueous solution of a reducing agent to reduce the gold. In the recovery method of
When using hydrochloric acid with a concentration of 0.25 to 3N for scrubbing,
By adjusting the gold concentration in the organic phase to a predetermined concentration,
A method for recovering gold, characterized in that an increase in the amount of gold is realized by forming an organic phase at the bottom.
請求項1記載のスクラビング時の塩酸濃度を0.
25Nに調整し、有機相中の金濃度を67g/L以上にすること
を特徴とする金の回収方法。
The hydrochloric acid concentration during scrubbing according to claim 1 is set to 0.
A method for recovering gold, wherein the gold concentration is adjusted to 25 N and the gold concentration in the organic phase is set to 67 g / L or more.
請求項1記載のスクラビング時の塩酸濃度を0.
25より高く〜0.5N以下に調整し、有機相中の金濃度を74
g/L以上にすることを特徴とする金の回収方法。
The hydrochloric acid concentration during scrubbing according to claim 1 is set to 0.
Adjust the gold concentration in the organic phase to 74, higher than 25 and lower than 0.5N.
A method for recovering gold, characterized in that it is at least g / L.
請求項1記載のスクラビング時の塩酸濃度を0.
5より高く〜1.5N以下に調整し、有機相中の金濃度を92g
/L以上にすることを特徴とする金の回収方法。
The hydrochloric acid concentration during scrubbing according to claim 1 is set to 0.
Adjust the gold concentration in the organic phase to 92g.
/ L or more, The gold | metal collection | recovery method characterized by the above-mentioned.
請求項1記載のスクラビング時の塩酸濃度を1.
5より高く〜2.25N以下に調整し、有機相中の金濃度を10
1g/L以上にすることを特徴とする金の回収方法。
The hydrochloric acid concentration during scrubbing according to claim 1 is 1.
Adjust the gold concentration in the organic phase to higher than 5 to ≦ 2.25N
A method for recovering gold, wherein the amount is 1 g / L or more.
請求項1記載のスクラビング時の塩酸濃度を2.
25より高く〜3N以下に調整し、有機相中の金濃度を109g
/L以上にすることを特徴とする金の回収方法。




2. The hydrochloric acid concentration during scrubbing according to claim 1.
Adjust the gold concentration in organic phase to 109g
/ L or more, The gold | metal collection | recovery method characterized by the above-mentioned.




JP2005053661A 2005-02-28 2005-02-28 Recovering method of gold Pending JP2006233317A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9068245B2 (en) 2012-10-19 2015-06-30 Kennecott Utah Copper Llc Process for the recovery of gold from anode slimes
JP2017524808A (en) * 2014-06-05 2017-08-31 オウトテック (フィンランド) オサケ ユキチュアOutotec (Finland) Oy Gold solvent extraction
CN111363920A (en) * 2020-04-07 2020-07-03 金川集团股份有限公司 Method for extracting gold from silver-containing liquid

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9068245B2 (en) 2012-10-19 2015-06-30 Kennecott Utah Copper Llc Process for the recovery of gold from anode slimes
US9839885B2 (en) 2012-10-19 2017-12-12 Kennecott Utah Copper Llc Process for the recovery of gold from anode slimes
US10512884B2 (en) 2012-10-19 2019-12-24 Kennecott Utah Copper Llc Process for the recovery of gold from anode slimes
JP2017524808A (en) * 2014-06-05 2017-08-31 オウトテック (フィンランド) オサケ ユキチュアOutotec (Finland) Oy Gold solvent extraction
CN111363920A (en) * 2020-04-07 2020-07-03 金川集团股份有限公司 Method for extracting gold from silver-containing liquid

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