JPS58221240A - Method for recovering gold - Google Patents
Method for recovering goldInfo
- Publication number
- JPS58221240A JPS58221240A JP10242782A JP10242782A JPS58221240A JP S58221240 A JPS58221240 A JP S58221240A JP 10242782 A JP10242782 A JP 10242782A JP 10242782 A JP10242782 A JP 10242782A JP S58221240 A JPS58221240 A JP S58221240A
- Authority
- JP
- Japan
- Prior art keywords
- gold
- slurry
- activated carbon
- ore
- cyanide
- 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
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Liquids With Adsorbents In General (AREA)
Abstract
Description
【発明の詳細な説明】 本発明は金鉱石からの金の回収法に関するものである。[Detailed description of the invention] The present invention relates to a method for recovering gold from gold ore.
金鉱石からの金の回収はいくつかの方法で実施されてい
るが、その一つにＣＩＰ（Ｃａｒｂｏｎ ｉｎ Ｐｕ１
ｐ ）法として知られている方法がある。この方法では
先ず、金鉱石をシアン水溶液中で微粉砕してスラリー（
パルプ）を形成させる。このスラリーに空気を吹き込み
つつ十数時間〜数十時間攪拌して、鉱石中の金の大部分
を溶出させる。次いで、このスラリー中に活性炭を投入
して、スラリー中の溶解している金を活性炭に吸着させ
る。最後にスラリーから活性炭を分離・回収Ｉ２、スラ
リーはシアンを除去したのち廃棄される。Gold recovery from gold ore is carried out by several methods, one of which is CIP (Carbon in Pu1).
There is a method known as the p) method. In this method, gold ore is first pulverized in an aqueous cyanide solution to create a slurry (
pulp). This slurry is stirred for ten to several tens of hours while blowing air to dissolve most of the gold in the ore. Next, activated carbon is introduced into this slurry, and the dissolved gold in the slurry is adsorbed onto the activated carbon. Finally, activated carbon is separated and recovered from the slurry I2, and the slurry is discarded after removing cyanide.
このｃｒｐ法では、活性炭によるスラリーからの金の回
収は、向流多段接触法により行なわれる。すなわち多数
の吸着槽を直列に接続し、槽列の前端にスラリーを、後
端に活性炭を供給して、両者を向流で移動させろ。この
方法によれば、新しく供給された吸着能の最も高い活性
炭は全濃度の最も低いスラリーと接触するので、スラリ
ーからの金の回収率を高くすることができる。本発明は
、このＣＩＰ法における金の回収率をさらに向上させる
方法に関するものである。In this CRP method, recovery of gold from a slurry using activated carbon is performed by a countercurrent multistage contact method. That is, connect a large number of adsorption tanks in series, supply slurry to the front end of the tank row and activated carbon to the rear end, and move both in countercurrent. According to this method, the newly supplied activated carbon with the highest adsorption capacity comes into contact with the slurry with the lowest total concentration, thereby increasing the recovery rate of gold from the slurry. The present invention relates to a method for further improving the gold recovery rate in this CIP method.
ＣＩＩＰ法における活性炭による金の吸着は、共存する
遊離シアンにより影響され、シアン濃度が低いほど金の
平衡吸着量は大きい。第１図はこの関係の一例を示すも
ので、２０−、 Ｓ Ｏｐｐｍの金を含むジシアノ含酸
ナトリウム水溶液（ｐＨ／ ０．．７〜１０６）夕Ｏｔ
ｎｌに、活性炭（石炭系、粒Ｋｆ−３；ｂｓメツシュ通
過９．５’％以上、表面積＋！ｓ ｏ ｍ２／ ｙ ）
／ ｓ〜、２００〜９を投入し、２ｊ−℃で７２時間
値盪したときの液中の全濃度ど活性炭への合服着量との
関係を実験的に求めたものである。この図から明らかな
よって、ＣＩＰ法における向流多段接触に際しては、ス
ラリーのシアン濃度が低いほど、このプロセスから排出
されるスラリー中の全濃度は低下する。The adsorption of gold by activated carbon in the CIIP method is influenced by coexisting free cyanide, and the lower the cyanide concentration, the larger the equilibrium adsorption amount of gold. Figure 1 shows an example of this relationship.
nl, activated carbon (coal-based, grain Kf-3; bs mesh passage 9.5'% or more, surface area +!s o m2/y)
The graph shows the relationship between the total concentration in the liquid and the amount adhering to the activated carbon when 200~9/s~ was added and stirred for 72 hours at 2J-°C. As is clear from this figure, during countercurrent multistage contact in the CIP process, the lower the cyanide concentration of the slurry, the lower the total concentration in the slurry discharged from this process.
しかし、向流多段接触の過程においては、活性炭による
金の吸着と同時に、遊離のシアンによる鉱石からの金の
溶出も行なわれている。この金の溶出は、シアン濃度が
高いほど促進される。However, in the process of countercurrent multistage contact, gold is adsorbed by activated carbon and at the same time gold is eluted from the ore by free cyanide. This elution of gold is accelerated as the cyanide concentration increases.
従ってスラリーの遊離シアン濃度を低下させて向流多段
接触に供することは、スラリーからの金の吸着には有利
であっても、鉱石からの金の溶出には不利に作用し、全
体として必ずしも有利ではない。Therefore, reducing the free cyanide concentration of the slurry and subjecting it to countercurrent multistage contact may be advantageous for the adsorption of gold from the slurry, but it may have a disadvantageous effect on the elution of gold from the ore, and is not necessarily advantageous as a whole. isn't it.
本発明はこの問題を、向流多段接触の後半でスラリーの
遊離シアン濃度を低下させることにより解決したもので
ある。この方法によれば、鉱石中の金含有量が多く、従
って金溶出量の比較的多い工程の前半では、遊離シアン
濃度が高いままなので、金の溶出は正常に行なわれる。The present invention solves this problem by reducing the free cyanide concentration of the slurry in the latter half of the countercurrent multistage contact. According to this method, in the first half of the process where the gold content in the ore is high and therefore the amount of gold eluted is relatively large, the concentration of free cyanide remains high, so that the gold leaches out normally.
一方、この工程の後半では、遊離シアン密度が低く吸着
に有利な状態で、スラリーと活性炭との接触が行なわれ
るので、この工程から排出されるスラリー中の溶解全濃
度を低下させることができる。従って本発明方法によれ
ば、金の溶出を阻害せずに金の吸着を促進するので、金
−ご −
の回収率を向上させることができる。On the other hand, in the latter half of this step, the slurry is brought into contact with activated carbon in a state where the density of free cyanide is low and is favorable for adsorption, so the total dissolved concentration in the slurry discharged from this step can be reduced. Therefore, according to the method of the present invention, the adsorption of gold is promoted without inhibiting the elution of gold, so that the recovery rate of gold can be improved.
本発明を実施するに際しては、金鉱石の粉砕、シアン（
ヒソーダ水溶液との混合によるスラリーの形成、および
空気吹込みによる金の溶出等は、常法に従って行なわれ
ろ。例えばスラリーのシアン化ソーダ２＋ρ度を００コ
〜θ２Ｓ％とし、数個の攪拌槽を直列に結合した溶出装
置で、２０〜ＳＯ時間空気を吹込みつつ攪拌する。溶出
装置から排出されろスラリーは、数個、例えば４〜９個
の攪拌槽を直列に接続した吸着装置に供給し、順次下流
に移動させる。なお所望ならば、吸着装置に供給する前
に、スラリーの濃度を調整する。捷だ、スラリーから金
を溶解している水溶液の一部を分離し、この水溶液から
別工程で金を回収するようにしてもよい。When carrying out the present invention, grinding of gold ore, cyanide (
Formation of a slurry by mixing with an aqueous solution of hisodium, elution of gold by blowing air, etc. are carried out according to conventional methods. For example, the sodium cyanide 2+ρ degree of the slurry is set to 00 to θ2S%, and the slurry is stirred while blowing air for 20 to SO hours using an elution device having several stirring tanks connected in series. The slurry discharged from the elution device is supplied to an adsorption device having several, for example, 4 to 9 stirring tanks connected in series, and is sequentially moved downstream. Additionally, if desired, the concentration of the slurry may be adjusted prior to feeding to the adsorption device. Alternatively, a part of the aqueous solution in which gold is dissolved may be separated from the slurry, and gold may be recovered from this aqueous solution in a separate process.
一方、最下流の攪拌槽には活性炭を供給し、順次上流に
移動させる。活性炭の供給量は、その種類にもよるが、
金／９−当り５ｏｏ−ｓｏｏｏＬｉ−程度である。活性
炭としては粒状のものが用いられ、粒径はＯり〜３．
Ｏｎｒｍ程度が好ましい。On the other hand, activated carbon is supplied to the most downstream stirring tank and sequentially moved upstream. The amount of activated carbon supplied depends on its type, but
It is about 5oo-soooLi- per gold/9-. Granular activated carbon is used, and the particle size is 0 to 3.
Onrm level is preferable.
−４，一
本発明においては、この吸着装置中で遊離シアンの濃度
を低下させて、活性炭による金の吸着に有利な環境を与
える。シアン濃度の低下は、スラリーに次亜塩素酸ソー
ダ等の酸化剤を添加して遊離のシアンを分解することに
より、常温で容易に行なうことができる。酸化剤の添加
量は遊離のシアン化ソーダに対し、理論量ないし一倍量
でよい。この際、スラリーのｐＨを７Ｓ〜ｇ程度に低下
させると、シアンの分解が著しく促進される。シアン濃
度の低下は吸着装置の後半で行なわれる。例えば６個の
攪拌槽からなる装置であれば、第ｙ〜を番目のいずれか
の槽に酸化剤を供給すればよいが、シアン濃度の低下し
たスラリーと活性炭との接触時間が／〜３時間程度とな
るように供給位置を選択するのが好ましい。-4.1 In the present invention, the concentration of free cyanide is reduced in the adsorption device to provide an environment favorable for adsorption of gold by activated carbon. The cyanide concentration can be easily reduced at room temperature by adding an oxidizing agent such as sodium hypochlorite to the slurry to decompose free cyanide. The amount of the oxidizing agent to be added may be a theoretical amount to one times the amount of free sodium cyanide. At this time, when the pH of the slurry is lowered to about 7S to 7g, the decomposition of cyanide is significantly accelerated. Cyan concentration reduction takes place in the second half of the adsorption device. For example, in the case of an apparatus consisting of 6 stirring tanks, the oxidizing agent may be supplied to any of the y-th tanks, but the contact time between the slurry with a reduced cyanide concentration and the activated carbon is 3 hours. It is preferable to select the feeding position so that the
本発明方法によればＣＩＰ法における金の回収率を向上
させることができる。また、排出されるスラリーは□遊
離シアン濃度が低いので、そのま−まないしは簡単な除
害処理を行なっただけで廃棄できろ。According to the method of the present invention, the gold recovery rate in the CIP method can be improved. In addition, the discharged slurry has a low concentration of free cyanide, so it can be disposed of as is or after simple abatement treatment.
図はジシアノ金酸ナトリウム水溶液に活性炭を添加して
金を吸着させた際の、水溶液中の金濃度と活性炭への合
服着量との関係の一例を示すグラフである。実線は水溶
液にシアン化ソーダを３００ ｐｐｍとなるように添加
した場合であり、点線はシアン化ソーダを添加しない場
合である。
特許出願人 三菱化成工業株式会社
代 理 人 弁理士 長谷用 −
ほか７名
７−The figure is a graph showing an example of the relationship between the gold concentration in the aqueous solution and the amount of adhesion to the activated carbon when activated carbon is added to an aqueous solution of sodium dicyanoaurate to adsorb gold. The solid line represents the case where sodium cyanide was added to the aqueous solution at a concentration of 300 ppm, and the dotted line represents the case where sodium cyanide was not added. Patent applicant Mitsubishi Chemical Industries, Ltd. Agent Patent attorney Yo Hase - 7 others 7-
Claims (2)
溶解工程と、該工程から排出される溶出残渣を含むスラ
リーを活性炭と向流多段接触させて溶解している金を活
性炭に吸着させる吸着工程とからなる金の回収法におい
て、向流多段接触過程の後半でスラリー中の遊離シアン
濃度を低下させることを特徴とする方法・(1) A dissolution step in which gold ore is mixed with an aqueous cyanide solution to elute the gold, and the slurry containing the elution residue discharged from this step is brought into countercurrent contact with activated carbon in multiple stages to adsorb the dissolved gold onto the activated carbon. A gold recovery method comprising an adsorption step, which is characterized by reducing the free cyanide concentration in the slurry in the latter half of the countercurrent multi-stage contact process.
一部を分離・回収したのち、スラＩＪ−を吸着工程に供
給することを特徴とする特許請求の範囲第１項記載の方
法。(2) The method according to claim 1, characterized in that after separating and recovering a portion of the aqueous solution from the slurry discharged from the dissolution step, the sludge IJ- is supplied to the adsorption step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10242782A JPS58221240A (en) | 1982-06-15 | 1982-06-15 | Method for recovering gold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10242782A JPS58221240A (en) | 1982-06-15 | 1982-06-15 | Method for recovering gold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58221240A true JPS58221240A (en) | 1983-12-22 |
Family
ID=14327154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10242782A Pending JPS58221240A (en) | 1982-06-15 | 1982-06-15 | Method for recovering gold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58221240A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009024200A (en) * | 2007-07-18 | 2009-02-05 | Okuchi Denshi Kk | Method for separation and recovery of noble metal |
| EP2865769A4 (en) * | 2012-06-22 | 2016-03-02 | Kuraray Chemical Kk | Activated carbon for noble metal adsorption, noble metal adsorption filter, and method for recovering noble metals |
| JP2016534874A (en) * | 2013-10-17 | 2016-11-10 | アショク エイドリアン シング | Fluid processing apparatus and process |
| CN113736997A (en) * | 2021-09-07 | 2021-12-03 | 山东国大黄金股份有限公司 | Method for decyanating, flotation and recovery of gold and silver from cyanidation tailings treated by sulfuric acid in cooperation |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5518501A (en) * | 1978-06-30 | 1980-02-08 | Sumitomo Metal Mining Co Ltd | Recovering method for valuable metal from water solution containing cyanide compound of valuable metal |
-
1982
- 1982-06-15 JP JP10242782A patent/JPS58221240A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5518501A (en) * | 1978-06-30 | 1980-02-08 | Sumitomo Metal Mining Co Ltd | Recovering method for valuable metal from water solution containing cyanide compound of valuable metal |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009024200A (en) * | 2007-07-18 | 2009-02-05 | Okuchi Denshi Kk | Method for separation and recovery of noble metal |
| EP2865769A4 (en) * | 2012-06-22 | 2016-03-02 | Kuraray Chemical Kk | Activated carbon for noble metal adsorption, noble metal adsorption filter, and method for recovering noble metals |
| US9782750B2 (en) | 2012-06-22 | 2017-10-10 | Kuraray Co., Ltd. | Activated carbon for noble metal adsorption, noble metal adsorption filter, and method for recovering noble metals |
| JP2016534874A (en) * | 2013-10-17 | 2016-11-10 | アショク エイドリアン シング | Fluid processing apparatus and process |
| US10441926B2 (en) | 2013-10-17 | 2019-10-15 | Ashok Adrian Singh | Fluid treatment apparatus and process |
| US11285447B2 (en) | 2013-10-17 | 2022-03-29 | Ashok Adrian Singh | Fluid treatment apparatus and process |
| CN113736997A (en) * | 2021-09-07 | 2021-12-03 | 山东国大黄金股份有限公司 | Method for decyanating, flotation and recovery of gold and silver from cyanidation tailings treated by sulfuric acid in cooperation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4188208A (en) | Recovery of gold from carbonaceous gold-bearing ores | |
| US4738718A (en) | Method for the recovery of gold using autoclaving | |
| US5425800A (en) | Recovery of precious metal values from refractory ores | |
| JPS61186430A (en) | Recovery of gold from aqueous slurry formed from ore hard totreat | |
| US4925485A (en) | Process for the isolation of noble metals | |
| US5147618A (en) | Process for recovery of gold from refractory gold ores using sulfurous acid as the leaching agent | |
| US5536480A (en) | Method for treating mineral material having organic carbon to facilitate recovery of gold and silver | |
| EP3004406B1 (en) | Method for arsenic oxidation and removal from process and waste solutions | |
| EP2643491B1 (en) | Alkaline and acid pressure oxidation of precious metal-containing materials | |
| US5147617A (en) | Process for recovery of gold from gold ores using a complexing pretreatment and sulfurous acid leaching | |
| US11401580B2 (en) | Method for pre-treatment of gold-bearing oxide ores | |
| JP2005523992A (en) | Gold collection method | |
| JPS58221240A (en) | Method for recovering gold | |
| US6406675B1 (en) | Method for reducing cyanide consumption during processing of gold and silver ores to remove base metals | |
| US4734270A (en) | Sulfide treatment to inhibit mercury adsorption onto activated carbon in carbon-in-pulp gold recovery circuits | |
| RU2490344C1 (en) | Extraction method of gold from ores and products of their processing | |
| AU642278B2 (en) | A process for the enhanced production of silver from gold and silver bearing ore | |
| WO2002042503A1 (en) | Recovery of precious metals from carbonaceous refractory ores | |
| US5320665A (en) | Metal recovery process from solution with a steel substrate | |
| US4605537A (en) | Sulfide as a hypochlorite kill agent | |
| RU2234544C1 (en) | Method of reworking of auriferous arsenical ores and concentrates | |
| RU2749310C2 (en) | Method for pocessing sulphide gold and copper float concentrate | |
| CA1236308A (en) | Process for hydrometallurgical extraction of precious metals | |
| RU2023733C1 (en) | Method of extracting noble metals from cyanide solutions and pulps containing nonferrous metals | |
| EA041003B1 (en) | METHOD FOR AUTOCLAVE PROCESSING OF CARBONIC GOLD-CONTAINING CONCENTRATES USING ADDITIONAL REAGENT-OXIDIZER |