EP2690199A2 - System for electrowinning silver and/or copper out of a gold alloy - Google Patents
System for electrowinning silver and/or copper out of a gold alloy Download PDFInfo
- Publication number
- EP2690199A2 EP2690199A2 EP13162781.2A EP13162781A EP2690199A2 EP 2690199 A2 EP2690199 A2 EP 2690199A2 EP 13162781 A EP13162781 A EP 13162781A EP 2690199 A2 EP2690199 A2 EP 2690199A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- silver
- copper
- electrolyte
- cathode
- 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.)
- Withdrawn
Links
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 31
- 239000004332 silver Substances 0.000 title claims abstract description 31
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 20
- 239000010949 copper Substances 0.000 title claims abstract description 20
- 229910001020 Au alloy Inorganic materials 0.000 title claims abstract description 11
- 239000003353 gold alloy Substances 0.000 title claims abstract description 11
- 238000005363 electrowinning Methods 0.000 title 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 21
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000003792 electrolyte Substances 0.000 claims abstract description 18
- -1 silver ions Chemical class 0.000 claims abstract description 10
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical group [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims abstract description 9
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000012153 distilled water Substances 0.000 claims abstract description 7
- 229910052737 gold Inorganic materials 0.000 claims abstract description 7
- 239000010931 gold Substances 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910001431 copper ion Inorganic materials 0.000 claims abstract description 6
- 239000004063 acid-resistant material Substances 0.000 claims abstract description 4
- 238000001914 filtration Methods 0.000 claims abstract description 4
- 230000008878 coupling Effects 0.000 claims abstract description 3
- 238000010168 coupling process Methods 0.000 claims abstract description 3
- 238000005859 coupling reaction Methods 0.000 claims abstract description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- FOIXSVOLVBLSDH-UHFFFAOYSA-N Silver ion Chemical compound [Ag+] FOIXSVOLVBLSDH-UHFFFAOYSA-N 0.000 claims 1
- 238000005086 pumping Methods 0.000 claims 1
- 229910000365 copper sulfate Inorganic materials 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract 2
- 238000010792 warming Methods 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 101150114468 TUB1 gene Proteins 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- PQTCMBYFWMFIGM-UHFFFAOYSA-N gold silver Chemical compound [Ag].[Au] PQTCMBYFWMFIGM-UHFFFAOYSA-N 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- C25C1/12—Electrolytic production, recovery or refining of metals by electrolysis of solutions of copper
-
- 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
-
- 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
Definitions
- the invention relates to a device for separating silver and / or copper from a gold alloy with an anode, a cathode and an electrolyte.
- Old gold usually consists of a gold alloy with silver and / or copper shares. Therefore, there is a need for a device that readily enables the gold or copper to be deposited from a gold alloy whose gold content does not exceed 33%.
- the CH 426278 A already discloses a process for the electrolytic precipitation of silver-gold alloys.
- the stated object is achieved in that the anode is formed by the gold alloy to be separated, the cathode is formed by a copper sheet, means are provided for heating the electrolyte to more than 30 ° C., the electrolyte is copper sulfate dissolved in distilled water, which, after binding of the copper ions at the cathode, converts to sulfuric acid, provides a magnetic vortex generating pump circulating in sulfuric acid with the pumped silver ions enriched by the action of the magnetic field, and filtering out the metallic silver from the electrolyte pumped with silver ions Silver filter is provided.
- the pump is a magnetic drive pump.
- the silver filter preferably consists of a copper plate suspended in a separate space.
- the anode 7 can be suspended in a container 8 perforated on one side from an acid-resistant material, at the bottom of which the divisional gold 6 accumulates.
- the invention will be explained below with reference to a drawing.
- the single figure shows a schematic view of the device.
- a tub 1 is in a (not shown) heat sink, which ensures a process temperature of 35 ° C.
- an electrolyte-forming solution of copper sulfate in distilled water In the tub 1 is an electrolyte-forming solution of copper sulfate in distilled water.
- An anode 7 is formed by the noble metal alloy to be separated, it hangs in a laterally perforated cup. The anode is connected in the usual way with a 12 V DC power source.
- the cathode 10 is formed by a copper sheet and is connected to the negative pole of the power source. When a voltage is applied between the anode and the cathode, a current flows through which electrolytic copper 9 deposits on the cathode 10.
- Copper ions migrate from the anode 7 to the cathode 10.
- the copper 10 is released from the anode. Once the copper ions are bonded to the cathode 10, the bath transforms from a copper sulfate solution to a sulfuric acid solution.
- the heated sulfuric acid is capable of dissolving the silver from the anode 7.
- the generated silver ions are deposited on the cathode only when the solution is saturated.
- the silver ions behave diamagnetically, so they can be distracted by a magnetic field.
- the magnetic coupling pump 5 used for this purpose generates a magnetic vortex which causes the silver ions to rotate around the pump.
- the silver ions are sucked off and pumped into a silver filter 3 which is suspended in a separate space in which copper plates 2 hang.
- the silver filter 3 consists in the illustrated embodiment of a separate container made of an acid-resistant material. Due to the electrochemical series of voltages, silver ions impinging on copper atoms form metallic silver 4, which deposits on the copper plates 2. The copper goes into solution and runs over the edge of the container 3 back into the tub.
- the fine gold remains on the ground in the form of a black powder.
- the recovered gold powder and the recovered silver powder are washed in distilled water and melted.
- the invention makes it possible to separate copper and silver from a gold alloy in the smallest space and with optimum energy efficiency.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zum Scheiden von Silber und/oder Kupfer aus einer Goldlegierung mit einer Anode, einer Kathode und einem Elektrolyten.The invention relates to a device for separating silver and / or copper from a gold alloy with an anode, a cathode and an electrolyte.
Altgold besteht üblicherweise aus einer Goldlegierung mit Silber und/oder Kupferanteilen. Es besteht daher Bedarf an einer Vorrichtung, die es in einfacher Weise ermöglicht, das Silber oder Kupfer aus einer Goldlegierung, dessen Goldanteil 33 % nicht übersteigt, zu scheiden.Old gold usually consists of a gold alloy with silver and / or copper shares. Therefore, there is a need for a device that readily enables the gold or copper to be deposited from a gold alloy whose gold content does not exceed 33%.
Die
Erfindungsgemäß wird die genannte Aufgabe dadurch gelöst, dass die Anode durch die zu scheidende Goldlegierung gebildet wird, die Kathode durch ein Kupferblech gebildet wird, Mittel zum Erwärmen des Elektrolyts auf mehr als 30 °C vorgesehen sind, der Elektrolyt in destilliertem Wasser gelöstes Kupfersulfat ist, das sich nach Bindung der Kupferionen an der Kathode in Schwefelsäure wandelt, einen magnetischen Wirbel erzeugende, dem sich in Schwefelsäure umgewandelten Elektrolyten mit den durch die Wirkung des Magnetfelds angereicherten Silberionen umpumpende Pumpe vorgesehen ist und ein das metallische Silber aus dem mit Silberionen umgepumpten Elektrolyt heraus filternder Silberfilter vorgesehen ist.According to the invention, the stated object is achieved in that the anode is formed by the gold alloy to be separated, the cathode is formed by a copper sheet, means are provided for heating the electrolyte to more than 30 ° C., the electrolyte is copper sulfate dissolved in distilled water, which, after binding of the copper ions at the cathode, converts to sulfuric acid, provides a magnetic vortex generating pump circulating in sulfuric acid with the pumped silver ions enriched by the action of the magnetic field, and filtering out the metallic silver from the electrolyte pumped with silver ions Silver filter is provided.
Vorzugsweise ist die Pumpe ist eine Magnetkupplungspumpe.Preferably, the pump is a magnetic drive pump.
Der Silberfilter besteht vorzugsweise aus einem in einem gesonderten Raum hängend angeordneten Kupferplatten.The silver filter preferably consists of a copper plate suspended in a separate space.
Die Anode 7 kann in einen einseitig perforierten Behälter 8 aus einem säurebeständigen Material eingehängt sein, an dessen Boden sich das geschiedene Gold 6 ansammelt.The
Die Erfindung wird im Folgenden anhand einer Zeichnung erläutert. Dabei zeigt die einzige Figur eine schematische Ansicht der Vorrichtung.The invention will be explained below with reference to a drawing. The single figure shows a schematic view of the device.
Eine Wanne 1 steht in einem (nicht gezeigten) Wärmebecken, das eine Prozesstemperatur von 35 °C gewährleistet. In der Wanne 1 findet sich eine den Elektrolyten bildende Lösung aus Kupfersulfat in destilliertem Wasser. Eine Anode 7 wird durch die zu scheidende Edelmetalllegierung gebildet, sie hängt in einem seitlich perforierten Becher. Die Anode ist in üblicher Weise mit einer 12 V Gleichstromquelle verbunden.A
Die Kathode 10 wird durch ein Kupferblech gebildet und ist mit dem Minuspol der Stromquelle verbunden. Bei Anlegen einer Spannung zwischen Anode und Kathode fließt ein Strom, durch den sich Elektrolytkupfer 9 an der Kathode 10 abscheidet.The
Von der Anode 7 wandern Kupferionen zur Kathode 10. Das Kupfer 10 wird aus der Anode gelöst. Sobald die Kupferionen an der Kathode 10 gebunden sind, wandelt sich das Bad von einer Kupfersulfatlösung zu einer Schwefelsäurelösung.Copper ions migrate from the
Die erwärmte Schwefelsäure ist in der Lage, das Silber aus der Anode 7 zu lösen. Die erzeugten Silberionen scheiden sich jedoch nur dann an der Kathode ab, wenn die Lösung gesättigt ist. Die Silberionen verhalten sich jedoch diamagnetisch, sie lassen sich also durch ein Magnetfeld ablenken.The heated sulfuric acid is capable of dissolving the silver from the
Die zu diesem Zweck eingesetzte Magnetkupplungspumpe 5 erzeugt einen Magnetwirbel, die ein Rotieren der Silberionen um die Pumpe bewirken. Die Silberionen werden abgesaugt und in einen Silberfilter 3, der in einem gesonderten Raum, in dem Kupferplatten 2 hängen, gepumpt. Der Silberfilter 3 besteht in dem dargestellten Ausführungsbeispiel aus einem gesonderten Behälter aus einem säurefesten Material. Auf Kupferatome auftreffende Silberionen bilden aufgrund der elektrochemischen Spannungsreihe metallisches Silber 4, das sich an den Kupferplatten 2 ablagert. Das Kupfer geht in Lösung und läuft über den Rand des Behälters 3 zurück in die Wanne.The
Andere Metalle wie Palladium, Zink, Nickel, Indium verbleiben in der Lösung. Wenn zunehmend Fremdmetalle außer Kupfer gelöst sind, sinkt der Wirkungsgrad des Elektrolyten, so dass er ausgetauscht werden muss. Der verbrauchte Elektrolyt kann durch Kristallisation von Kupfersulfat regeneriert werden. Die anderen gelösten Metalle können ebenfalls durch Kristallisierung der Salze getrennt werden.Other metals such as palladium, zinc, nickel, indium remain in the solution. When foreign metals are increasingly dissolved except copper, the efficiency of the electrolyte decreases, so it must be replaced. The spent electrolyte can be regenerated by crystallization of copper sulfate. The other dissolved metals can also be separated by crystallization of the salts.
Bei einer optimalen Einrichtung des Kreislaufs sind daher nur destilliertes Wasser und Strom nach- bzw. zuzuführen.With an optimal device of the circuit, therefore, only distilled water and electricity should be supplied or supplied.
Wenn alle Metalle herausgelöst sind, bleibt auf dem Boden das Feingold in Form eines schwarzen Pulvers zurück. Das gewonnene Goldpulver und das gewonnene Silberpulver werden in destilliertem Wasser gewaschen und eingeschmolzen.When all the metals are dissolved out, the fine gold remains on the ground in the form of a black powder. The recovered gold powder and the recovered silver powder are washed in distilled water and melted.
Die Erfindung ermöglicht es, auf kleinstem Raum und optimaler Energieeffizienz Kupfer und Silber aus einer Goldlegierung zu scheiden.The invention makes it possible to separate copper and silver from a gold alloy in the smallest space and with optimum energy efficiency.
Claims (4)
dadurch gekennzeichnet, dass
characterized in that
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012015015A DE102012015015B3 (en) | 2012-07-28 | 2012-07-28 | Apparatus for separating silver and / or copper from a gold alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2690199A2 true EP2690199A2 (en) | 2014-01-29 |
| EP2690199A3 EP2690199A3 (en) | 2016-06-01 |
Family
ID=47990957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13162781.2A Withdrawn EP2690199A3 (en) | 2012-07-28 | 2013-04-08 | System for electrowinning silver and/or copper out of a gold alloy |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP2690199A3 (en) |
| DE (1) | DE102012015015B3 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH426278A (en) | 1960-06-15 | 1966-12-15 | Demag Elektrometallurgie Gmbh | Process for the electrolytic pre-separation of silver-gold alloys, as well as application of the process |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4287044A (en) * | 1980-03-31 | 1981-09-01 | Silver Systems, Ltd. | Silver recovery apparatus |
| CN202193854U (en) * | 2011-07-28 | 2012-04-18 | 张吉贵 | Full-automatic intelligent film developing and printing waste liquid silver recycling machine |
-
2012
- 2012-07-28 DE DE102012015015A patent/DE102012015015B3/en active Active
-
2013
- 2013-04-08 EP EP13162781.2A patent/EP2690199A3/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH426278A (en) | 1960-06-15 | 1966-12-15 | Demag Elektrometallurgie Gmbh | Process for the electrolytic pre-separation of silver-gold alloys, as well as application of the process |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2690199A3 (en) | 2016-06-01 |
| DE102012015015B3 (en) | 2013-04-18 |
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