WO2010067828A1 - Electrolytic recovery device for gold or silver - Google Patents
Electrolytic recovery device for gold or silver Download PDFInfo
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- WO2010067828A1 WO2010067828A1 PCT/JP2009/070622 JP2009070622W WO2010067828A1 WO 2010067828 A1 WO2010067828 A1 WO 2010067828A1 JP 2009070622 W JP2009070622 W JP 2009070622W WO 2010067828 A1 WO2010067828 A1 WO 2010067828A1
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
- C25C1/20—Electrolytic production, recovery or refining of metals by electrolysis of solutions of noble metals
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
- C25C7/06—Operating or servicing
- C25C7/08—Separating of deposited metals from the cathode
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- the present invention relates to an apparatus for electrolytically recovering gold from a solution containing gold and an apparatus for electrolytically recovering silver from a solution containing silver, and in particular, gold or silver electrodeposited on a cylindrical cathode surface is used as a cathode.
- the present invention relates to an electrolytic recovery device for gold or silver which can be easily peeled off from the surface.
- Electrolytic methods are widely used as means for recovering silver from silver-containing waste liquids such as silver plating solutions and photographic fixing solutions.
- an apparatus for electrolytically recovering silver from a solution containing silver for example, an electrolytic cell, an anode disposed in the electrolytic cell, a removable cathode disposed in the electrolytic cell surrounding the anode, and the above Electrical connection provided outside the electrolytic cell for the cathode and the anode, the electrolytic cell having a conductive contact surface, and gripping the deformable part of the cathode with respect to the contact surface
- a silver recovery device including a gripping device that performs electrical connection from the cathode connector to the cathode is known.
- an apparatus for electrolytically recovering silver from a solution containing silver for example, an electrolytic cell; an anode positioned in the cell; a reference electrode positioned in the cell; a detachable cathode positioned in the cell (this cathode) Has an inner surface facing the anode and an outer surface facing the reference electrode); a silver electrowinning device is known that includes means for inhibiting silver deposition on the outer surface of the cathode.
- Patent Document 2 for example, see Patent Document 2
- an apparatus for electrolytically recovering gold from a solution containing gold such as gold plating waste liquid an apparatus for electrolytically recovering gold from gold plating waste liquid and cleaning water after gold plating using, for example, a Ti rotating cathode is disclosed.
- This apparatus is characterized in that the oxide film is removed with hydrofluoric acid, hydrochloric acid or nitric hydrofluoric acid on the front and back surfaces of the Ti rotating electrode as a method for preventing the electrodeposition gold from peeling off. (For example, see Patent Document 3)
- cyan waste solution containing valuable metals such as gold is supplied to the electrolytic cell, and insoluble materials are used for the anode, and electrolysis is performed while rotating the cathode plate to deposit valuable metals such as gold on the surface of the cathode plate.
- An apparatus for recovering valuable metals from a cyan-containing waste liquid is known. (For example, see Patent Document 4)
- the precipitated silver sometimes peeled off from the cathode, which caused a short circuit between the anode and the cathode, which accelerated the consumption of the anode and hindered continuation of electrolysis.
- the precious metal electrolysis recovery device of Patent Document 3 is considered to adhere to the Ti rotating electrode without peeling off, but the noble metal electrodeposited on the Ti rotating electrode is from the upper end over the entire surface of the electrode. Since the Ti rotating electrode is reused because it is tightly attached to the lower end, there has been a problem that even if a spatula or a hammer is used to peel the noble metal from the Ti rotating electrode, it cannot be easily peeled off.
- Patent Document 4 the valuable metal recovery device disclosed in Patent Document 4 is different from the electrolytic recovery device of the present invention in that it uses a disc-shaped one instead of a cylindrical one as a cathode.
- the above disk-shaped cathode has a problem that noble metals such as gold and silver are thickly electrodeposited on both the front and back surfaces, so that even if a spatula or hammer is used to peel the noble metal from the cathode, it cannot be easily peeled off. There was a point.
- the present invention facilitates gold or silver electrodeposited on a cathode so that the cylindrical rotating cathode can be reused repeatedly in an electrolytic recovery device for gold or silver using a cylindrical rotating cathode such as stainless steel or titanium.
- An object of the present invention is to provide a gold or silver electrolytic recovery apparatus improved so that it can be peeled off.
- the present invention (1) In an electrolytic recovery device for gold or silver composed of an electrolytic layer, a control device, an anode and a cylindrical cathode,
- the cylindrical cathode has an insulating cap fitted to the entire periphery of the lower edge portion, and a plurality of strip-shaped insulating materials are detachably mounted in the longitudinal direction at one place on the outer peripheral surface of the cylindrical cathode with a gap.
- a gold or silver electrolytic recovery device characterized in that the electrodeposited gold or silver can be easily separated from the cylindrical cathode by removing the strip-like insulating material; (2) The gold or silver electrolytic recovery apparatus according to (1) above, wherein the upper part of the cylindrical cathode is a lid having a gas vent hole, (3) The gold or silver electrolytic recovery device according to any one of (1) or (2) above, wherein the insulating cap and the strip-shaped insulating material are synthetic resin or rubber, (4) The strip or insulator according to any one of (1) to (3) above, wherein the strip-shaped insulating material is detachably mounted in a longitudinal direction on one outer peripheral surface of the cylindrical cathode by a screw.
- Silver electrolytic recovery equipment (5) The gold or silver electrolytic recovery device according to any one of (1) to (4) above, wherein the anode is disposed outside the cylindrical cathode in the electrolytic cell; (6) The gold or silver electrodeposited on the surface of the cylindrical cathode is configured so that it can be peeled into a cylindrical shape by removing the strip-shaped insulating material and removing the strip-shaped insulating material. (5) The gold or silver electrolytic recovery device according to any one of Was completed.
- the present invention by adopting a specially processed cylindrical cathode, gold or silver deposited on the cylindrical cathode from the electrolytic recovery solution of gold or silver can be separated and recovered very easily. Further, the cylindrical cathode after the gold or silver is peeled and collected can be reused repeatedly.
- FIG. 1 is a perspective view showing an embodiment of a silver electrolytic recovery apparatus according to the present invention.
- FIG. 2 is a perspective view of a cylindrical cathode in the electrolytic recovery apparatus of FIG.
- FIG. 3 is a perspective view showing a state in which the cylindrical cathode in the electrolytic recovery apparatus of FIG. 1 is inverted.
- FIG. 4 is a perspective view of the electrolytic silver peeled from the cathode.
- FIG. 1 is a perspective view of a silver electrolytic recovery apparatus according to the present invention
- FIG. 2 is a perspective view of a cylindrical cathode in the electrolytic recovery apparatus of FIG.
- the cylindrical cathode 3 has a diameter of 250 mm and a height of 370 mm in consideration of workability and economy.
- the electrolytic cell 1 is integrated with a control device 2, and current control is performed by the control device 2.
- a cylindrical cathode 3 is fixed to the cathode fixing rod 10 by a screw 13 so as to rotate about the cathode fixing rod 10 fixed to the electrolytic cell 1 at the inner central portion of the electrolytic cell 1.
- the cylindrical cathode 3 can be easily removed from the electrolytic cell 1 by removing the screw 13 after the silver is deposited.
- the anode 4 is provided facing (relatively) the outer periphery of the cylindrical cathode 3.
- four anodes 4 are disposed surrounding four sides of the cylindrical cathode 3.
- the main characteristics are that the silver deposited on the cylindrical cathode 3 can be easily peeled off, and that the cylindrical cathode 3 is processed so as not to peel off from the cathode during electrolysis.
- the lid 11 is provided with a plurality of vent holes 12, and an opening for fixing the cathode fixing rod 10 to the cathode 10 with a screw 13 is provided at the center.
- the bottom surface of the cylindrical cathode 3 is opened without a lid.
- An insulating cap 7 is fitted over the entire circumference of the lower edge of the cylindrical cathode 3.
- a plurality of strip-shaped insulating materials 6 are secured to one place in the longitudinal direction of the outer peripheral surface 5 of the cylindrical cathode 3 with screws 9 so that a plurality of gaps 8 can be attached and detached.
- the gap 8 is a gap that prevents the silver deposited around the cylindrical cathode 3 from peeling off.
- the gap 8 is one place, but a plurality of places may be provided.
- the preferable range of the gap 8 is 1 mm to 10 mm, preferably 3 to 7 mm. If it is 1 mm or less, it is not preferable because it is peeled off during electrolysis, and if it is 10 mm or more, it is not preferable because it takes time for the peeling work.
- examples of the material constituting the cylindrical cathode 3 include titanium and stainless steel. Moreover, as a material which comprises an anode, what plated platinum or a platinum alloy on reticulated titanium is mentioned.
- examples of materials constituting the insulating cap 7 and the strip-shaped insulating material 6 provided on the cylindrical cathode 3 in order to facilitate the peeling of silver deposited on the cylindrical cathode 3 include, for example, polyethylene, polypropylene, polycarbonate, nylon and polyester. And synthetic rubbers such as natural rubber, polyurethane rubber, nitrile rubber and silicone rubber.
- the waste liquid that is the target of the recovery apparatus is a recovered silver plating liquid or a recovered liquid obtained by dissolving and peeling silver from an electronic component or the like that is mainly discharged from a plating factory.
- a polyethylene insulating cap 7 is fitted over the entire periphery of the lower edge of the cylindrical cathode 3. Furthermore, a belt-like insulating material 6 made of polyethylene is similarly fixed to the longitudinal two outer peripheral surfaces 5 of the cylindrical cathode 3 with screws 9. At that time, as shown in FIG. 2, the strip-shaped insulating material 6 is provided with a gap 8 of 5 mm so as not to be joined.
- the cylindrical cathode 3 thus prepared is connected to the cathode fixing rod 10 of the electrolytic cell 1 with screws 13. Wear it.
- the silver recovery waste liquid 14 is filled in the electrolytic cell 1, the power of the control device 2 is turned on, and silver contained in the waste liquid is deposited on the cylindrical cathode 3 by electrolysis. As a result, electrolytic silver is deposited in the gap 8. For this reason, the electrolytic silver separated by the polyethylene strip-shaped insulating material 6 is communicated by the electrolytic silver deposited in the gap 8 portion, so that the silver was not peeled off or separated from the cathode.
- FIG. 4 shows the separated piece 17 (electrolytic silver deposited in the gap) of the peeled cylindrical electrolytic silver 16 in the gap 8.
- Example 2 is an example relating to a gold electrolytic recovery apparatus.
- the description of the electrolysis recovery apparatus for silver according to the first embodiment is also applicable to the electrolysis recovery apparatus for gold, and will be described only by replacing the silver being described with gold. For this reason, duplicate descriptions are avoided and further descriptions are omitted here.
- the electrolytic recovery device for gold or silver employs a specially processed cylindrical cathode, so that gold or silver deposited on the cylindrical cathode from the electrolytic recovery solution of gold or silver can be separated and recovered very easily. It enables efficient recovery of gold or silver and has great industrial applicability. Further, since the cylindrical cathode after the gold or silver is peeled and collected can be reused repeatedly, the industrial applicability is great from the viewpoint of saving materials.
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Abstract
An electrolytic recovery device for gold or silver is constituted so that gold or silver electroplated onto cathodes can be easily stripped off so that a barrel cathode (3) can be repeatedly used. An electrolytic recovery device for gold or silver, which comprises an electrolysis layer (1), a control device (2), anode (4), and barrel cathode (3), is constituted so that an insulating cap is fitted onto the entire circumference of a lower edge, a plurality of strip-shaped insulators are detachably applied with gaps provided therebetween in the longitudinal direction at one location of the outer circumferential surface of the barrel cathode (3), and electroplated gold or silver can be thereby easily stripped off from the barrel cathode by removing the strip-shaped insulators.
Description
本発明は、金を含有する溶液から金を電解回収するための装置及び銀を含有する溶液から銀を電解回収するための装置に係り、特に円筒状陰極表面に電着した金又は銀を陰極から容易に剥離することができるようにした金又は銀の電解回収装置に関するものである。
The present invention relates to an apparatus for electrolytically recovering gold from a solution containing gold and an apparatus for electrolytically recovering silver from a solution containing silver, and in particular, gold or silver electrodeposited on a cylindrical cathode surface is used as a cathode. The present invention relates to an electrolytic recovery device for gold or silver which can be easily peeled off from the surface.
金めっき液、電子部品等をリサイクル処理した際に発生する金を含有する廃液から金を回収する手段として、電解法が広く実施されている。また、銀めっき液、写真定着液等の銀を含有する廃液から銀を回収する手段として、電解法が広く実施されている。
As a means for recovering gold from waste liquid containing gold generated when gold plating solution, electronic parts, etc. are recycled, electrolysis is widely implemented. Electrolytic methods are widely used as means for recovering silver from silver-containing waste liquids such as silver plating solutions and photographic fixing solutions.
銀を含有する溶液から銀を電解回収する装置として、例えば、電解槽、この電解槽内に配置された陽極、この陽極を包囲して前記電解槽内に配置された取り外し可能な陰極、および前記陰極および陽極のための、前記電解槽の外側に設けられた電気接続具を備え、前記電解槽は導電性の接触面を有し、前記陰極の変形可能な部分を前記接触面に対して把持して陰極の接続具から陰極への電気的接続を行う把持装置を備えた銀の回収装置が知られている。（例えば、特許文献１参照）
As an apparatus for electrolytically recovering silver from a solution containing silver, for example, an electrolytic cell, an anode disposed in the electrolytic cell, a removable cathode disposed in the electrolytic cell surrounding the anode, and the above Electrical connection provided outside the electrolytic cell for the cathode and the anode, the electrolytic cell having a conductive contact surface, and gripping the deformable part of the cathode with respect to the contact surface Thus, a silver recovery device including a gripping device that performs electrical connection from the cathode connector to the cathode is known. (For example, see Patent Document 1)
また、銀を含有する溶液から銀を電解回収するための装置として、例えば、電解槽；槽内に位置した陽極；槽内に位置した参照電極；槽内に位置した脱着しうる陰極（この陰極は陽極に対向した内面及び参照電極に対向した外面を有する）；陰極の外面での銀の析出を抑制するための手段を含む銀の電解回収装置が知られている。（例えば、特許文献２参照）
Further, as an apparatus for electrolytically recovering silver from a solution containing silver, for example, an electrolytic cell; an anode positioned in the cell; a reference electrode positioned in the cell; a detachable cathode positioned in the cell (this cathode) Has an inner surface facing the anode and an outer surface facing the reference electrode); a silver electrowinning device is known that includes means for inhibiting silver deposition on the outer surface of the cathode. (For example, see Patent Document 2)
そしてまた、金めっき廃液等の金を含有する溶液から金を電解回収する装置として、例えばＴｉ製回転陰極を使用して金めっき廃液及び金めっき後の洗浄水から金を電解回収する装置が開示されている。この装置では、電着金の剥離脱落防止する方法としてＴｉ回転電極の表裏面を弗化水素酸または塩酸或いは硝弗酸で酸化膜を除去することを特徴とするものである。（例えば、特許文献３参照）
Further, as an apparatus for electrolytically recovering gold from a solution containing gold such as gold plating waste liquid, an apparatus for electrolytically recovering gold from gold plating waste liquid and cleaning water after gold plating using, for example, a Ti rotating cathode is disclosed. Has been. This apparatus is characterized in that the oxide film is removed with hydrofluoric acid, hydrochloric acid or nitric hydrofluoric acid on the front and back surfaces of the Ti rotating electrode as a method for preventing the electrodeposition gold from peeling off. (For example, see Patent Document 3)
また、金等の有価金属を含有するシアン廃液を電解槽に供給し、陽極に不溶性材料を用いると共に、陰極板を回転させながら電気分解を行い、該陰極板表面に金等の有価金属を析出させるシアン含有廃液からの有価金属の回収装置が知られている。（例えば、特許文献４参照）
In addition, cyan waste solution containing valuable metals such as gold is supplied to the electrolytic cell, and insoluble materials are used for the anode, and electrolysis is performed while rotating the cathode plate to deposit valuable metals such as gold on the surface of the cathode plate. An apparatus for recovering valuable metals from a cyan-containing waste liquid is known. (For example, see Patent Document 4)
しかしながら、上記した特許文献１及び特許文献２に開示されているような円筒形状の陰極を使用する電解回収装置においては、陰極材料そのものが薄く、上縁には多数の切込みが設けられているので電解槽への装着、取外等の作業にたいへん手間が掛かった。
However, in the electrolytic recovery apparatus using the cylindrical cathode as disclosed in Patent Document 1 and Patent Document 2 described above, the cathode material itself is thin and a large number of cuts are provided on the upper edge. It took a lot of work to attach to and remove from the electrolytic cell.
また、析出した銀が陰極より剥離する場合があり、それにより陽極と陰極とが短絡し、陽極の消耗が促進され、電解の継続に支障をきたすものであった。
In addition, the precipitated silver sometimes peeled off from the cathode, which caused a short circuit between the anode and the cathode, which accelerated the consumption of the anode and hindered continuation of electrolysis.
更に、特許文献３の貴金属電解回収装置は、Ｔｉ回転電極へ剥離脱落せずに密着するものと考えられるが、前記のＴｉ回転電極へ電着した貴金属は、電極の表面全体に亘って上端から下端までびっしりと、付着されているのでＴｉ回転電極を再使用するためＴｉ回転電極から貴金属を剥すのにヘラやハンマーを使用しても容易に剥離することができないという問題点があった。
Furthermore, the precious metal electrolysis recovery device of Patent Document 3 is considered to adhere to the Ti rotating electrode without peeling off, but the noble metal electrodeposited on the Ti rotating electrode is from the upper end over the entire surface of the electrode. Since the Ti rotating electrode is reused because it is tightly attached to the lower end, there has been a problem that even if a spatula or a hammer is used to peel the noble metal from the Ti rotating electrode, it cannot be easily peeled off.
また、上記特許文献４に開示された有価金属回収装置は陰極として円筒形状のものを使用するのではなく円板状のものを使用する点で本願発明の電解回収装置と相違する。
Further, the valuable metal recovery device disclosed in Patent Document 4 is different from the electrolytic recovery device of the present invention in that it uses a disc-shaped one instead of a cylindrical one as a cathode.
上記の円板状陰極は表面、裏面の両方へ金、銀等の貴金属が厚く電着されるため陰極から貴金属を剥すのにヘラやハンマーを使用しても容易に剥離することができないという問題点があった。
The above disk-shaped cathode has a problem that noble metals such as gold and silver are thickly electrodeposited on both the front and back surfaces, so that even if a spatula or hammer is used to peel the noble metal from the cathode, it cannot be easily peeled off. There was a point.
本発明は、ステンレス、チタン等の円筒状回転陰極を使用した金又は銀の電解回収装置において、円筒状回転陰極を繰返し再使用し得るようにするべく、陰極に電着した金又は銀を容易に剥離することができるように改良した金又は銀の電解回収装置を提供することを目的とする。
The present invention facilitates gold or silver electrodeposited on a cathode so that the cylindrical rotating cathode can be reused repeatedly in an electrolytic recovery device for gold or silver using a cylindrical rotating cathode such as stainless steel or titanium. An object of the present invention is to provide a gold or silver electrolytic recovery apparatus improved so that it can be peeled off.
本発明者らは、上記の問題を解決すべく、以下の発明を完成させた。
すなわち、本発明は、
（１）電解層、制御装置、陽極及び円筒状陰極から構成された金又は銀の電解回収装置において、
前記円筒状陰極は、下縁部全周に絶縁キャップが嵌着され、前記円筒状陰極の外周表面一箇所の縦方向には、複数の帯状絶縁材を、間隙を設けて着脱可能に装着し、前記帯状絶縁材を外すことにより電着した金又は銀を円筒状陰極から容易に剥離できるようにしたことを特徴とする金又は銀の電解回収装置、
（２）円筒状陰極の上部がガス抜き孔を有する蓋体であることを特徴とする上記（１）記載の金又は銀の電解回収装置、
（３）絶縁キャップ及び帯状絶縁材が合成樹脂又はゴムであることを特徴とする上記（１）又は（２）のいずれかに記載の金又は銀の電解回収装置、
（４）帯状絶縁材は、ネジにより円筒状陰極の外周表面一箇所の縦方向に着脱自在に装着されていることを特徴とする上記（１）乃至（３）のいずれかに記載の金又は銀の電解回収装置、
（５）電解槽中の円筒状陰極の外側に陽極を配置したことを特徴とする上記（１）乃至（４）のいずれかに記載の金又は銀の電解回収装置、
（６）円筒状陰極表面に電着した金又は銀は、帯状絶縁材のネジを外し、帯状絶縁材を取り除くことにより円筒状に剥離できるように構成したことを特徴とする上記（１）乃至（５）のいずれかに記載の金又は銀の電解回収装置、
を完成させた。 In order to solve the above problems, the present inventors have completed the following invention.
That is, the present invention
(1) In an electrolytic recovery device for gold or silver composed of an electrolytic layer, a control device, an anode and a cylindrical cathode,
The cylindrical cathode has an insulating cap fitted to the entire periphery of the lower edge portion, and a plurality of strip-shaped insulating materials are detachably mounted in the longitudinal direction at one place on the outer peripheral surface of the cylindrical cathode with a gap. A gold or silver electrolytic recovery device characterized in that the electrodeposited gold or silver can be easily separated from the cylindrical cathode by removing the strip-like insulating material;
(2) The gold or silver electrolytic recovery apparatus according to (1) above, wherein the upper part of the cylindrical cathode is a lid having a gas vent hole,
(3) The gold or silver electrolytic recovery device according to any one of (1) or (2) above, wherein the insulating cap and the strip-shaped insulating material are synthetic resin or rubber,
(4) The strip or insulator according to any one of (1) to (3) above, wherein the strip-shaped insulating material is detachably mounted in a longitudinal direction on one outer peripheral surface of the cylindrical cathode by a screw. Silver electrolytic recovery equipment,
(5) The gold or silver electrolytic recovery device according to any one of (1) to (4) above, wherein the anode is disposed outside the cylindrical cathode in the electrolytic cell;
(6) The gold or silver electrodeposited on the surface of the cylindrical cathode is configured so that it can be peeled into a cylindrical shape by removing the strip-shaped insulating material and removing the strip-shaped insulating material. (5) The gold or silver electrolytic recovery device according to any one of
Was completed.
すなわち、本発明は、
（１）電解層、制御装置、陽極及び円筒状陰極から構成された金又は銀の電解回収装置において、
前記円筒状陰極は、下縁部全周に絶縁キャップが嵌着され、前記円筒状陰極の外周表面一箇所の縦方向には、複数の帯状絶縁材を、間隙を設けて着脱可能に装着し、前記帯状絶縁材を外すことにより電着した金又は銀を円筒状陰極から容易に剥離できるようにしたことを特徴とする金又は銀の電解回収装置、
（２）円筒状陰極の上部がガス抜き孔を有する蓋体であることを特徴とする上記（１）記載の金又は銀の電解回収装置、
（３）絶縁キャップ及び帯状絶縁材が合成樹脂又はゴムであることを特徴とする上記（１）又は（２）のいずれかに記載の金又は銀の電解回収装置、
（４）帯状絶縁材は、ネジにより円筒状陰極の外周表面一箇所の縦方向に着脱自在に装着されていることを特徴とする上記（１）乃至（３）のいずれかに記載の金又は銀の電解回収装置、
（５）電解槽中の円筒状陰極の外側に陽極を配置したことを特徴とする上記（１）乃至（４）のいずれかに記載の金又は銀の電解回収装置、
（６）円筒状陰極表面に電着した金又は銀は、帯状絶縁材のネジを外し、帯状絶縁材を取り除くことにより円筒状に剥離できるように構成したことを特徴とする上記（１）乃至（５）のいずれかに記載の金又は銀の電解回収装置、
を完成させた。 In order to solve the above problems, the present inventors have completed the following invention.
That is, the present invention
(1) In an electrolytic recovery device for gold or silver composed of an electrolytic layer, a control device, an anode and a cylindrical cathode,
The cylindrical cathode has an insulating cap fitted to the entire periphery of the lower edge portion, and a plurality of strip-shaped insulating materials are detachably mounted in the longitudinal direction at one place on the outer peripheral surface of the cylindrical cathode with a gap. A gold or silver electrolytic recovery device characterized in that the electrodeposited gold or silver can be easily separated from the cylindrical cathode by removing the strip-like insulating material;
(2) The gold or silver electrolytic recovery apparatus according to (1) above, wherein the upper part of the cylindrical cathode is a lid having a gas vent hole,
(3) The gold or silver electrolytic recovery device according to any one of (1) or (2) above, wherein the insulating cap and the strip-shaped insulating material are synthetic resin or rubber,
(4) The strip or insulator according to any one of (1) to (3) above, wherein the strip-shaped insulating material is detachably mounted in a longitudinal direction on one outer peripheral surface of the cylindrical cathode by a screw. Silver electrolytic recovery equipment,
(5) The gold or silver electrolytic recovery device according to any one of (1) to (4) above, wherein the anode is disposed outside the cylindrical cathode in the electrolytic cell;
(6) The gold or silver electrodeposited on the surface of the cylindrical cathode is configured so that it can be peeled into a cylindrical shape by removing the strip-shaped insulating material and removing the strip-shaped insulating material. (5) The gold or silver electrolytic recovery device according to any one of
Was completed.
本発明によれば、特殊加工した円筒状陰極を採用することで金又は銀の電解回収液から円筒状陰極に析出した金又は銀を極めて容易に剥離回収することができる。また、金又は銀を剥離回収した後の円筒状陰極は繰返し再使用することができる。
According to the present invention, by adopting a specially processed cylindrical cathode, gold or silver deposited on the cylindrical cathode from the electrolytic recovery solution of gold or silver can be separated and recovered very easily. Further, the cylindrical cathode after the gold or silver is peeled and collected can be reused repeatedly.
以下、本発明について図面に従ってさらに詳細に説明する。
Hereinafter, the present invention will be described in more detail with reference to the drawings.
本発明の金又は銀の電解回収装置を用いてまず電解銀を回収する場合を説明する。
First, the case where electrolytic silver is recovered using the gold or silver electrolytic recovery apparatus of the present invention will be described.
図１は本発明に係る銀の電解回収装置の斜視図で、図２は、図１の電解回収装置における円筒状陰極の斜視図である。円筒状陰極３は、作業性、経済性等を勘案して直径２５０ｍｍ、高さ３７０ｍｍの大きさのものが使用される。
FIG. 1 is a perspective view of a silver electrolytic recovery apparatus according to the present invention, and FIG. 2 is a perspective view of a cylindrical cathode in the electrolytic recovery apparatus of FIG. The cylindrical cathode 3 has a diameter of 250 mm and a height of 370 mm in consideration of workability and economy.
図１、図２に示すように、電解槽１は、制御装置２が一体となっていて、この制御装置２によって電流制御が行われている。電解槽１の内部中央部には、円筒状陰極３が電解槽１に固定されている陰極固定棒１０を軸に回転するようにネジ１３によって陰極固定棒１０に固定されている。この円筒状陰極３は銀の析出が済んだ後、ネジ１３を外すことにより電解槽１から容易に取り外しすることができる。また、円筒状陰極３の外周に対峙して（相対して）、陽極４が設置されている。ここでは、図１に示されているように、円筒状陰極３の四方を取り囲み、４つの陽極４が配設される。
As shown in FIGS. 1 and 2, the electrolytic cell 1 is integrated with a control device 2, and current control is performed by the control device 2. A cylindrical cathode 3 is fixed to the cathode fixing rod 10 by a screw 13 so as to rotate about the cathode fixing rod 10 fixed to the electrolytic cell 1 at the inner central portion of the electrolytic cell 1. The cylindrical cathode 3 can be easily removed from the electrolytic cell 1 by removing the screw 13 after the silver is deposited. In addition, the anode 4 is provided facing (relatively) the outer periphery of the cylindrical cathode 3. Here, as shown in FIG. 1, four anodes 4 are disposed surrounding four sides of the cylindrical cathode 3.
本発明においては、円筒状陰極３へ析出した銀を簡単に剥離できるようにすること、および電解中に陰極から剥がれ落ちないよう円筒状陰極３に加工を施してあることが主たる特徴でもある。
In the present invention, the main characteristics are that the silver deposited on the cylindrical cathode 3 can be easily peeled off, and that the cylindrical cathode 3 is processed so as not to peel off from the cathode during electrolysis.
すなわち、本発明の銀の電解回収装置における円筒状陰極３は、図２に示すように上面は蓋１１によって覆われている。また、蓋１１には複数のガス抜き孔１２が設けられ、中央中心部には、陰極固定棒１０へネジ１３により固定する開口部が設けてある。
That is, the upper surface of the cylindrical cathode 3 in the silver electrolytic recovery apparatus of the present invention is covered with the lid 11 as shown in FIG. The lid 11 is provided with a plurality of vent holes 12, and an opening for fixing the cathode fixing rod 10 to the cathode 10 with a screw 13 is provided at the center.
図３に示すように円筒状陰極３の下面には蓋はなく開口されている。そして円筒状陰極３の下縁部全周に亘り絶縁キャップ７が嵌着されている。
As shown in FIG. 3, the bottom surface of the cylindrical cathode 3 is opened without a lid. An insulating cap 7 is fitted over the entire circumference of the lower edge of the cylindrical cathode 3.
一方、円筒状陰極３の外周表面５の縦方向一箇所には帯状絶縁材６が複数個間隙８を空けて着脱できるようにネジ９によって止めてある。
On the other hand, a plurality of strip-shaped insulating materials 6 are secured to one place in the longitudinal direction of the outer peripheral surface 5 of the cylindrical cathode 3 with screws 9 so that a plurality of gaps 8 can be attached and detached.
帯状絶縁材６を間隙を空けずに連続して装着しておいた場合、析出した銀は、帯状絶縁材６を境にして陰極から剥離し、電解の途中で脱落しまうため間隙８を設けておくことが重要である。即ち、この間隙８は、円筒状陰極３の周辺に析出した銀が剥離するのを防止する間隙である。実施例１では間隙８は一箇所であるが、複数箇所設けることもできる。間隙８の好ましい範囲は１ｍｍ～１０ｍｍ、好ましくは３～７ｍｍである。１ｍｍ以下になると電解の途中で剥離してしまうので好ましくない、１０ｍｍ以上になると剥離作業に手間がかかるので好ましくない。
When the strip-shaped insulating material 6 is continuously mounted without leaving a gap, the deposited silver peels off from the cathode with the strip-shaped insulating material 6 as a boundary and falls off during the electrolysis, so that a gap 8 is provided. It is important to keep That is, the gap 8 is a gap that prevents the silver deposited around the cylindrical cathode 3 from peeling off. In the first embodiment, the gap 8 is one place, but a plurality of places may be provided. The preferable range of the gap 8 is 1 mm to 10 mm, preferably 3 to 7 mm. If it is 1 mm or less, it is not preferable because it is peeled off during electrolysis, and if it is 10 mm or more, it is not preferable because it takes time for the peeling work.
本発明において、円筒状陰極３を構成する材料としては、例えば、チタン、ステンレス等が挙げられる。また、陽極を構成する材料としては、網状チタンに白金又は白金合金をめっきしたものが挙げられる。
In the present invention, examples of the material constituting the cylindrical cathode 3 include titanium and stainless steel. Moreover, as a material which comprises an anode, what plated platinum or a platinum alloy on reticulated titanium is mentioned.
本発明において、円筒状陰極３に析出した銀を剥離し易くするため円筒状陰極３に設ける絶縁キャップ７及び帯状絶縁材６を構成する材料としては、例えば、ポリエチレン、ポリプロピレン、ポリカーボネート、ナイロン及びポリエステル等の合成樹脂、天然ゴム、ポリウレタンゴム、ニトリルゴム及びシリコンゴム等のゴムが挙げられる。
In the present invention, examples of materials constituting the insulating cap 7 and the strip-shaped insulating material 6 provided on the cylindrical cathode 3 in order to facilitate the peeling of silver deposited on the cylindrical cathode 3 include, for example, polyethylene, polypropylene, polycarbonate, nylon and polyester. And synthetic rubbers such as natural rubber, polyurethane rubber, nitrile rubber and silicone rubber.
次に、本発明に係る銀の電解回収装置による銀を含有する廃液からの銀の回収について説明する。回収装置の対象となる廃液は、主にめっき工場から排出される使用後の銀めっき液或いは電子部品等から銀を溶解剥離した回収液である。
Next, recovery of silver from a waste liquid containing silver by the silver electrolytic recovery apparatus according to the present invention will be described. The waste liquid that is the target of the recovery apparatus is a recovered silver plating liquid or a recovered liquid obtained by dissolving and peeling silver from an electronic component or the like that is mainly discharged from a plating factory.
まず、円筒状陰極３の下縁部全周に亘りポリエチレン製の絶縁キャップ７を嵌着する。更に円筒状陰極３の外周表面５の縦方向二箇所へ同じくポリエチレン製の帯状絶縁材６をネジ９によって固定する。その際、前記帯状絶縁材６は図２に示すようにつなぎ合わせないよう５ｍｍの間隙８を設けておく、このように調製した円筒状陰極３は電解槽１の陰極固定棒１０へネジ１３により着装する。
First, a polyethylene insulating cap 7 is fitted over the entire periphery of the lower edge of the cylindrical cathode 3. Furthermore, a belt-like insulating material 6 made of polyethylene is similarly fixed to the longitudinal two outer peripheral surfaces 5 of the cylindrical cathode 3 with screws 9. At that time, as shown in FIG. 2, the strip-shaped insulating material 6 is provided with a gap 8 of 5 mm so as not to be joined. The cylindrical cathode 3 thus prepared is connected to the cathode fixing rod 10 of the electrolytic cell 1 with screws 13. Wear it.
次いで、電解槽１へ銀回収廃液１４を充填し、制御装置２の電源を入れ廃液中に含有する銀を電気分解により円筒状陰極３へ析出させた結果、間隙８に電解銀が析出されるためポリエチレン製帯状絶縁材６によってセパレートされた電解銀は、前記間隙８部分に析出した電解銀によって連通されているため銀は陰極から剥離、離脱することはなかつた。
Next, the silver recovery waste liquid 14 is filled in the electrolytic cell 1, the power of the control device 2 is turned on, and silver contained in the waste liquid is deposited on the cylindrical cathode 3 by electrolysis. As a result, electrolytic silver is deposited in the gap 8. For this reason, the electrolytic silver separated by the polyethylene strip-shaped insulating material 6 is communicated by the electrolytic silver deposited in the gap 8 portion, so that the silver was not peeled off or separated from the cathode.
円筒状陰極３は電解槽１から取り出し、帯状絶縁材６のネジ９を外し、帯状絶縁材６を除去することによって析出した電解銀１６は、図４に示すように円筒状陰極３から容易に剥離することができた。図４では、剥離した筒状の電解銀１６の、間隙８の部分にあった切り離された断片部１７（間隙部分に析出した電解銀）を示している。
The cylindrical cathode 3 is taken out from the electrolytic cell 1, and the electrolytic silver 16 deposited by removing the screw 9 of the strip-shaped insulating material 6 and removing the strip-shaped insulating material 6 is easily removed from the cylindrical cathode 3 as shown in FIG. It was possible to peel off. FIG. 4 shows the separated piece 17 (electrolytic silver deposited in the gap) of the peeled cylindrical electrolytic silver 16 in the gap 8.
実施例２は、金の電解回収装置に関する実施例である。上記の実施例１の銀の電解回収装置の説明は、同様に、金の電解回収装置にも、適用できるもので、説明中の銀を金と換えるのみで、説明される。このため、重複記載を避けて、これ以上の記載はここでは省略する。
Example 2 is an example relating to a gold electrolytic recovery apparatus. The description of the electrolysis recovery apparatus for silver according to the first embodiment is also applicable to the electrolysis recovery apparatus for gold, and will be described only by replacing the silver being described with gold. For this reason, duplicate descriptions are avoided and further descriptions are omitted here.
本発明による金又は銀の電解回収装置は、特殊加工した円筒状陰極を採用することで金又は銀の電解回収液から円筒状陰極に析出した金又は銀を極めて容易に剥離回収することができ、効率的な金又は銀の回収を可能とするもので、産業上の利用可能性は大きい。また、金又は銀を剥離回収した後の円筒状陰極は繰返し再使用することができるので、資材の節約の面からも産業上の利用可能性は大きい。
The electrolytic recovery device for gold or silver according to the present invention employs a specially processed cylindrical cathode, so that gold or silver deposited on the cylindrical cathode from the electrolytic recovery solution of gold or silver can be separated and recovered very easily. It enables efficient recovery of gold or silver and has great industrial applicability. Further, since the cylindrical cathode after the gold or silver is peeled and collected can be reused repeatedly, the industrial applicability is great from the viewpoint of saving materials.
Claims (6)
- 電解層、制御装置、陽極及び円筒状陰極から構成された金又は銀の電解回収装置において、前記円筒状陰極は、下縁部全周に絶縁キャップが嵌着され、前記円筒状陰極の外周表面一箇所の縦方向には、複数の帯状絶縁材を、間隙を設けて着脱可能に装着し、前記帯状絶縁材を外すことにより電着した金又は銀を円筒状陰極から容易に剥離できるようにしたことを特徴とする金又は銀の電解回収装置。 In the electrolytic recovery device of gold or silver composed of an electrolytic layer, a control device, an anode and a cylindrical cathode, the cylindrical cathode has an insulating cap fitted around the entire lower edge, and the outer peripheral surface of the cylindrical cathode In one longitudinal direction, a plurality of strip insulating materials are detachably mounted with a gap, and the electrodeposited gold or silver can be easily separated from the cylindrical cathode by removing the strip insulating materials. An electrolytic recovery device for gold or silver characterized by the above.
- 円筒状陰極の上部がガス抜き孔を有する蓋体であることを特徴とする請求項１記載の金又は銀の電解回収装置。 2. The gold or silver electrolytic recovery apparatus according to claim 1, wherein the upper part of the cylindrical cathode is a lid having a vent hole.
- 絶縁キャップ及び帯状絶縁材が合成樹脂又はゴムであることを特徴とする請求項１又は請求項２に記載の金又は銀の電解回収装置。 The gold or silver electrolytic recovery apparatus according to claim 1 or 2, wherein the insulating cap and the strip-shaped insulating material are synthetic resin or rubber.
- 帯状絶縁材は、ネジにより円筒状陰極の外周表面一箇所の縦方向に着脱自在に装着されていることを特徴とする請求項１乃至請求項３のいずれかに記載の金又は銀の電解回収装置。 4. The electrolytic recovery of gold or silver according to claim 1, wherein the strip-shaped insulating material is detachably mounted in a longitudinal direction on one outer peripheral surface of the cylindrical cathode by a screw. apparatus.
- 電解槽中の円筒状陰極の外側に陽極を配置したことを特徴とする請求項１乃至請求項４のいずれかに記載の金又は銀の電解回収装置。 The gold or silver electrolytic recovery apparatus according to any one of claims 1 to 4, wherein an anode is disposed outside the cylindrical cathode in the electrolytic cell.
- 円筒状陰極表面に電着した金又は銀は、帯状絶縁材のネジを外し、帯状絶縁材を取り除くことにより円筒状に剥離できるように構成したことを特徴とする請求項１乃至請求項５のいずれかに記載の金又は銀の電解回収装置。 The gold or silver electrodeposited on the surface of the cylindrical cathode is configured to be peeled into a cylindrical shape by removing the strip-shaped insulating material and removing the strip-shaped insulating material. The gold | metal | money or silver electrolysis collection | recovery apparatus in any one.
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| SG2011042603A SG172087A1 (en) | 2008-12-10 | 2009-12-09 | Electrolytic recovery device for gold or silver |
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| JP2008314464A JP4397961B1 (en) | 2008-12-10 | 2008-12-10 | Silver electrolytic recovery equipment |
| JP2009266176A JP4472021B1 (en) | 2009-11-24 | 2009-11-24 | Gold electrolytic recovery equipment |
| JP2009-266176 | 2009-11-24 |
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| MY (1) | MY158210A (en) |
| SG (1) | SG172087A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2013150664A1 (en) * | 2012-04-03 | 2013-10-10 | アサヒプリテック株式会社 | Method for recovering precious metal |
| CN106011945A (en) * | 2016-06-16 | 2016-10-12 | 东莞市盛德电解设备科技有限公司 | Electrolytic gold extraction machine |
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| JPS62161981A (en) * | 1986-01-08 | 1987-07-17 | Showa Denko Kk | Manufacture of electrolytic iron |
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| JPS52128611A (en) * | 1976-09-04 | 1977-10-28 | Hideo Mizuno | Execution method of slab offshore |
| TWM336956U (en) * | 2008-02-15 | 2008-07-21 | Waste Recovery Technology Inc | Metal electrolysis recycling apparatus |
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- 2009-12-09 SG SG2011042603A patent/SG172087A1/en unknown
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS50104104A (en) * | 1974-01-24 | 1975-08-16 | ||
| JPS50142422A (en) * | 1974-04-08 | 1975-11-17 | ||
| JPS52128611U (en) * | 1976-03-25 | 1977-09-30 | ||
| JPS62161981A (en) * | 1986-01-08 | 1987-07-17 | Showa Denko Kk | Manufacture of electrolytic iron |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2013150664A1 (en) * | 2012-04-03 | 2013-10-10 | アサヒプリテック株式会社 | Method for recovering precious metal |
| JP2013213267A (en) * | 2012-04-03 | 2013-10-17 | Asahi Pretec Corp | Method for recovering precious metal |
| CN106011945A (en) * | 2016-06-16 | 2016-10-12 | 东莞市盛德电解设备科技有限公司 | Electrolytic gold extraction machine |
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| SG172087A1 (en) | 2011-07-28 |
| TWI412628B (en) | 2013-10-21 |
| TW201030188A (en) | 2010-08-16 |
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