WO2010080761A1 - Système de récupération électrolytique de métaux à interface de connexion améliorée - Google Patents

Système de récupération électrolytique de métaux à interface de connexion améliorée Download PDF

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Publication number
WO2010080761A1
WO2010080761A1 PCT/US2010/020131 US2010020131W WO2010080761A1 WO 2010080761 A1 WO2010080761 A1 WO 2010080761A1 US 2010020131 W US2010020131 W US 2010020131W WO 2010080761 A1 WO2010080761 A1 WO 2010080761A1
Authority
WO
WIPO (PCT)
Prior art keywords
tank
cathode
metal
metal recovery
recovery apparatus
Prior art date
Application number
PCT/US2010/020131
Other languages
English (en)
Inventor
Randolph L. Epner
Original Assignee
Epner R L
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Epner R L filed Critical Epner R L
Publication of WO2010080761A1 publication Critical patent/WO2010080761A1/fr

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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
    • 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
    • C25C7/02—Electrodes; Connections thereof

Definitions

  • the present invention relates to an apparatus configured to extract metal from a liquid for recovery of the metal or purification of the liquid.
  • Recovery of metals from solution has generally been directed to methods and apparatus for electroplating the metal dissolved in the solution onto a cathode in an electrolytic recovery cell or tank.
  • electrolytic recovery systems typically comprise at least one anode and at least one cathode mounted in spaced apart relationship within a housing and are connected to a source of DC current. The recovery rate of the metal from the solution is dependent on the concentration of metal in the solution and the surface area of the anode and cathode.
  • the cathode may be formed of a base material that may or may not be conductive, surrounded by a layer of conductive metal.
  • the cathode is periodically removed from the recovery cell and the recovered metal is separated from the cathode by methods well known in the art. [0005] Several systems for the recovery of metals from solution are disclosed in U.S.
  • Patent Nos. 4,276,147, 4,863,580 and 4,960,500 incorporated by reference herein. These systems include anodes and cathodes that are energized by a DC power source. A solution containing a metal is pumped through the system and the metal is captured by the cathodes.
  • the present invention provides improvements over the systems disclosed in these patents.
  • the present invention provides a metal extraction apparatus for recovering metal from a solution.
  • the apparatus includes a recovery tank that houses a plurality of anodes and is configured to have metal-containing solution pumped therethrough.
  • the tank is configured to hold a plurality of removable cathodes.
  • a voltage difference is applied between the anodes and the cathodes so that the metal within the solution collects on the cathode.
  • that cathode may be removed so that the metal can be collected.
  • the cathodes can be connected to a cathode conductor of the tank using a plug-and-receptacle connector.
  • each of the cathode and cathode conductor has one connector element of the plug-and-receptacle connector.
  • the cathode conductor may have the plug connector element and the cathode may have the corresponding receptacle connector element.
  • the plug-and-receptacle connector provides both a strong mechanical and electrical connection between the cathode and the cathode conductor.
  • the connector element of the cathodes can be used to secure the cathodes to a mechanical hoist for removing the cathodes from the tank and transporting the cathodes.
  • the mechanical hoist includes a similar connector element as the cathode conductor so that the mechanical hoist can be attached to the cathode in the same manner as the cathode conductor. The secure mechanical connection between the connector element of the cathode and the connector element of the hoist allows the cathode to be easily removed from the tank and transported. Additionally, the cathode only needs one connector element for both electrical connection and connection to the mechanical hoist.
  • each cathode can include both a holder portion and a metal recovery plate.
  • the metal recovery plate may have a large surface area to provide efficient collection of the metal on the cathode.
  • the holder is configured to both supply the voltage potential to the metal recovery plate and also to help secure the metal recovery plate in place.
  • the holder can include supports that extend outward toward side walls of the tank. Corresponding saddles fixed to the tank side walls are configured to hold the supports in place, thereby securing the cathodes in a desired position.
  • the holder may include the plug-and-receptacle connector to connect to the cathode conductor.
  • FIG. 1 is a top view of a recovery cell tank in accordance with an embodiment of the invention.
  • Fig. 2 is a side view of the recovery cell tank shown in Fig. 1;
  • Fig. 3 is a cross-sectional view of the recovery cell tank shown in Fig. 1, taken along line 3—3;
  • Fig. 4 is a perspective view of particular features shown in Fig. 1.
  • the present invention provides a metal extraction apparatus, for recovering metal from a solution.
  • the apparatus is substantially contained in an electrolytic recovery cell tank 2 which includes an inlet end 4, an outlet end 6, a first side 8, and a second side 10.
  • the walls of the tank 4, 6, 8 and 10 are formed of a non-conductive material and may be corrosion resistant.
  • the tank walls can be made of a plastic material such as polyethylene or polypropylene.
  • the tank can include a support 11 providing a downward slope through the tank. The slope provided by the support 11 may be between 6° and 30°, for example about 10°.
  • the metal-containing solution is pumped through the tank from an inlet opening 12 to an outlet opening 14.
  • the recovery tank 2 includes a plurality of anodes 16 and cathodes 18 spaced apart from one another. As the solution is pumped through the tank, the metal therein accumulates on the cathodes 18. Each of the anodes 16 is fixed in the tank 2 while the cathodes 18 are removable. Accordingly, when the cathodes 18 have accumulated an amount of metal thereon, they may be removed from the recovery tank 2 and the metal can be collected.
  • Each of the anodes 16 are electrically connected to an anode bus bar 20 disposed on an outside of the first side 8 while each of the cathodes 18 are electrically connected to a cathode bus bar 22 disposed on an outside of the second side 10.
  • Figs. 1 and 2 show the three cathodes on the left side removed.
  • the anodes 16 are formed of solid metal plates and extend up from the floor 24 of the recovery tank 2 from the first side 8 to the second side 10.
  • the solid metal anodes 16 help direct the flow of the metal-containing solution and, in conjunction with the cathodes and the voltage difference between the anodes and cathodes provide the electric field for attracting the metal onto the cathodes.
  • the solid anodes 16 direct the solution through the recovery tank 2 along a serpentine flow path as indicated by the arrows in Fig. 1. As shown, the anodes 16 are fixed to baffles 26 at one side of the tank 2 and a flow gap 28 is left between the anode 16 and the opposite side of the tank 2.
  • anode 16a is fixed to baffle 26a at the second side 10 of the tank and the following anode 16b is fixed to baffle 26b at the first side 8 of the tank. Accordingly, the solution is forced to flow through the flow gap 28 at the first side 8 and then cross the entire tank 2 to the flow gap 28 at the second side 10.
  • the baffles 26 help direct the solution so that it flows more efficiently along the serpentine path.
  • the baffles 26 may be omitted and the solid metal anodes 16 can be fixed directly to a respective side wall 8, 10 of the recovery tank.
  • the metal anodes 16 effectively separate the recovery tank 2 into a plurality of recovery chambers 30 that are surrounded on each side by an anode 16.
  • the sloped angle provided by the support 11 allows solid contaminants in the solution to be separated out from the flow and slowly accumulate at the bottom of the tank 2.
  • Each of the anodes 16 are connected to the anode bus bar 20 with an anode conductor 32.
  • the anode conductor 32 and the anode bus bar 20 are enclosed by insulation.
  • the anode conductor 32 may be formed of an insulated wire and the anode bus bar 20 can be covered by an insulating material, such as plastic.
  • the exposed end of the anode conductor 32 can be electrically connected to the anode bus bar 20 and the entire anode bus bar 20 and exposed end of the anode conductor 32 can be covered with a PVC material such as plastisol.
  • Each of the anodes 16 are provided with an electrical potential through the anode bus bar 20 which is connected to a voltage source.
  • Each of the recovery chambers 30 is configured to hold a cathode 18.
  • the cathode 18 is positioned in the center of the chamber 30 between two anodes 16 such that the cathode 18 is exposed to the solution as it flows past it on either side.
  • the cathodes 18 have been removed from the three chambers on the left.
  • the recovery tank is configured such that the cathodes 18 can be removed easily to allow metal to be retrieved.
  • the illustrated cathode 18 shown in Figs. 3 and 4 includes a holder 34 and a metal recovery plate 36. Each metal recovery plate 36 is held in place in the tank 2 by the holder 34 and a series of posts 40 that each include slot 42 (Fig. 4). As shown in Fig.
  • the metal recovery plate may be positioned in the posts 40 so as to be disposed at a distance from the bottom 44 of the tank 2. This ensures that any deposits at the bottom of the tank 2 do not produce a short circuit between the anode 16 and the cathode 18.
  • the posts 40 are formed of a non-conductive material and can have a simple construction, such as a plastic pipe, for example PVC, with a slot 42 cut therein.
  • the metal recovery plate 36 is formed to have a large surface area so as to hold a large amount of recovered metal and provide high efficiency for extracting metal from the solution.
  • the metal recovery plates are made of a sheet of non- conductive cellular base layer with a conductive plating thereon.
  • each metal recovery plate 36 is held in place by a holder 34 which also supplies a voltage potential to the recovery plate 36.
  • the holders 34 each include a pair of conductive metal forks 46 having two conductive legs 48 spaced apart at a predetermined distance.
  • the legs 48 of the fork 46 are spaced apart a distance that is slightly smaller than the width of the metal recovery plates 36 so that the metal recovery plates 36 can fit snuggly in the forks 46 without any additional attachment mechanism.
  • additional attachments may be used to secure the metal recovery plate 36 in the fork 46.
  • the pair of conductive metal forks 46 may both be attached to the ends of a conductive beam 50, which may be made of a highly conductive material, such as copper.
  • the forks may be attached to the beam by any method that will provide an electrical connection, such as welding or bolting the legs of 48 of the forks 46 to a side face of the beam 50.
  • the holder also includes an electrical connector 52 coupled to the conductive beam 50. This coupling may also be of any type that allows a conductive coupling, such as welding or bolting.
  • the electrical connector 52 is configured to couple the cathode 18 to the cathode bus bar 22 by a cathode conductor 54 so as to provide a voltage potential to the cathode 18.
  • the holders 34 can include supports 56 that extend out from either side of the conductive beam 50.
  • the supports 56 are formed of a non- conductive material, such as plastic or natural polypropylene.
  • the supports 56 can be bolted or adhered to the conductive beam 50 in order to fix them together securely.
  • the near end of the supports 56 may also be covered by the insulator 60 in order to guarantee that no conductive portion of the holder 34 is exposed.
  • Each of the supports 56 are held in place at the side wall 8, 10 of the tank 2 by a saddle 58.
  • the saddle 58 can be formed of a non-conductive material, such as natural polypropylene and include a slot 62 configured to receive the support 56.
  • the saddles 58 are attached to the side walls 8, 10 of the tank 2 and can be fixed with attachments such as bolts or with an adhesive.
  • the weight of the cathode 18 may rest on the bottom of the slot 62 or can rest on the walls 8, 10 of the tank itself. Aside from securing the cathodes 18 in place, the saddles 58 also help guide the placement of the metal recovery plates 36 as the cathodes are inserted into the tank 2.
  • the electrical connector 52 of the cathode 18 includes a plug connector 64 and the cathode conductor 54 has a corresponding receptacle connector 66 to receive the plug connector 64.
  • the plug connector 64 may be provided on the cathode conductor 54 and the receptacle connector 66 provided on the cathode 18.
  • the respective plug and receptacle connectors 64, 66 provide a strong electrical connection as well as a secure mechanical connection between the cathode 18 and the cathode conductor 54.
  • the plug connector of electrical connector 52 is in the form of a shaft 64 and the receptacle connector 66 is in the shape of a conductive connector that includes a bore 68 configured to receive the shaft 64 of the plug connector.
  • a slot 70 can extend around a portion of the shaft at distance from the end 72 of the shaft and the bore 68 can have a corresponding projection 74 configured to be held within the slot 70.
  • a portion of the end of the shaft 72 can be cut out in order to provide a path for the projection 74.
  • the path is formed by a flat section 76 in the side of the shaft.
  • the receptacle connector 66 is then turned such that the projection 74 is moved into the slot 70.
  • the slot 70 may be tapered such that further turning of the receptacle connector 66 results in a tighter fit of the projection 74 within the slot 70.
  • the dimensions of the slot and projection may be configured so that friction between these elements results in a secure connection.
  • each of the cathode conductor 54 corresponding to each cathode 18 is attached to the cathode bus bar 22.
  • each of the cathode conductors 54 may include over-current protection between the cathode bus bar 22 and the cathode 18.
  • the illustrated embodiment includes a series of housings 78 corresponding to each cathode conductor 54 adjacent the cathode bus bar 22.
  • An over-current protection device is disposed in each housing 78 in series between the cathode bus bar 22 and each cathode 18. This over-current protection may be in the form of a fuse, or a circuit breaker.
  • the housings 78 are formed of a non-conductive material, such as polypropylene, and isolate the cathode conductor 54 from having direct electrical connection with the cathode bus bar 22.
  • each cathode 18 has its own over-current protection, if one of the cathodes 18 fails, for example due to a short between the cathode 18 and an adjacent anode 16, the remaining cathodes 18 and corresponding recovery chambers 30 can continue to operate without decreased efficiency.
  • the cathode bus bar 22 may be covered in an insulating material.
  • a cathode 18 including a holder 34 and a metal recovery plate 36 is inserted into each recovery chamber 30 between two anodes 16.
  • the cathodes 18 are positioned so that the metal recovery plates are disposed within the slots 42 of posts 40 and so that each support 56 of the holders 34 is disposed within the slot 62 of a saddle 58.
  • the electrical connector 52 of each holder 34 is electrically connected to the cathode bus bar 22 by securing plug connector 64 within receptacle connector 66 of a respective cathode conductor 54.
  • a voltage potential is then supplied between the anodes 16 and cathodes 18 and metal containing solution is pumped through the tank 2 so that metal accumulates on the metal recovery plates. Once an amount of metal has accumulated on a metal recovery plate 36, the corresponding cathode is disconnected from the cathode conductor 54.
  • the cathode 18 is then removed from the tank 2 for collecting the metal deposited thereon.
  • the cathode 18 can be connected to a mechanical hoist using the plug connector 64 that is used for the electrical connection of the cathode.
  • the mechanical hoist can include a receptacle connector 66 that receives the plug connector 64 of the cathode.
  • the mechanical connection provided by the plug connector 64 and receptacle connector 66 is sufficiently secure to allow the cathode 18 to be removed from the tank and transported using the electrical connector of the cathode 64.
  • the plug connector 62 may be included on the hoist and the receptacle connector 64 included on the cathode.

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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

L'invention porte sur un appareil d'extraction de métal pour récupérer du métal à partir d'une solution. L'appareil comprend une cuve de récupération qui reçoit une pluralité d'anodes et qui est configurée pour qu'une solution contenant du métal soit pompée à travers elle. La cuve est configurée pour contenir une pluralité d'électrodes amovibles. Lors du fonctionnement, une différence de potentiel est appliquée entre les anodes et les cathodes de telle sorte que le métal dans la solution s'accumule sur la cathode. Lorsqu'une quantité de métal s'est accumulée sur une cathode, cette cathode peut être retirée de telle sorte que le métal peut être collecté. Les cathodes peuvent comprendre un élément connecteur d'un connecteur à éléments mâle et femelle pour connecter électriquement la cathode à un potentiel électrique. Les cathodes peuvent, en variante ou en plus, comprendre des supports configurés pour être retenus dans des selles agencées sur des parois latérales de la cuve de récupération.
PCT/US2010/020131 2009-01-06 2010-01-05 Système de récupération électrolytique de métaux à interface de connexion améliorée WO2010080761A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14279009P 2009-01-06 2009-01-06
US61/142,790 2009-01-06

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WO2010080761A1 true WO2010080761A1 (fr) 2010-07-15

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012087398A1 (fr) * 2010-12-23 2012-06-28 Ge-Hitachi Nuclear Energy Americas Llc Systèmes de distribution d'énergie d'anode-cathode et procédés destinés à les utiliser pour une réduction électrochimique
US8598473B2 (en) 2011-12-22 2013-12-03 Ge-Hitachi Nuclear Energy Americas Llc Bus bar electrical feedthrough for electrorefiner system
US8746440B2 (en) 2011-12-22 2014-06-10 Ge-Hitachi Nuclear Energy Americas Llc Continuous recovery system for electrorefiner system
US8771482B2 (en) 2010-12-23 2014-07-08 Ge-Hitachi Nuclear Energy Americas Llc Anode shroud for off-gas capture and removal from electrolytic oxide reduction system
US8882973B2 (en) 2011-12-22 2014-11-11 Ge-Hitachi Nuclear Energy Americas Llc Cathode power distribution system and method of using the same for power distribution
US8900439B2 (en) 2010-12-23 2014-12-02 Ge-Hitachi Nuclear Energy Americas Llc Modular cathode assemblies and methods of using the same for electrochemical reduction
US8945354B2 (en) 2011-12-22 2015-02-03 Ge-Hitachi Nuclear Energy Americas Llc Cathode scraper system and method of using the same for removing uranium
US8956524B2 (en) 2010-12-23 2015-02-17 Ge-Hitachi Nuclear Energy Americas Llc Modular anode assemblies and methods of using the same for electrochemical reduction
US8968547B2 (en) 2012-04-23 2015-03-03 Ge-Hitachi Nuclear Energy Americas Llc Method for corium and used nuclear fuel stabilization processing
US9017527B2 (en) 2010-12-23 2015-04-28 Ge-Hitachi Nuclear Energy Americas Llc Electrolytic oxide reduction system
US9150975B2 (en) 2011-12-22 2015-10-06 Ge-Hitachi Nuclear Energy Americas Llc Electrorefiner system for recovering purified metal from impure nuclear feed material

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EP0266312A1 (fr) * 1986-10-27 1988-05-04 Eltech Systems Corporation Electrode reticulée et cellule pour la récuperation de métaux des eaux residuelles
JPH08206661A (ja) * 1995-02-08 1996-08-13 Permelec Electrode Ltd 硝酸塩の電気化学的回収方法及び装置
US20030089619A1 (en) * 2000-02-22 2003-05-15 Sunil Jayasekera Process and apparatus for recovery of cyanide and metals
JP3110444U (ja) * 2005-02-15 2005-06-23 大和特殊株式会社 金属の電解回収装置及び電解めっきシステム
JP2008280594A (ja) * 2007-05-11 2008-11-20 Sumitomo Electric Ind Ltd 金属精錬方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0266312A1 (fr) * 1986-10-27 1988-05-04 Eltech Systems Corporation Electrode reticulée et cellule pour la récuperation de métaux des eaux residuelles
JPH08206661A (ja) * 1995-02-08 1996-08-13 Permelec Electrode Ltd 硝酸塩の電気化学的回収方法及び装置
US20030089619A1 (en) * 2000-02-22 2003-05-15 Sunil Jayasekera Process and apparatus for recovery of cyanide and metals
JP3110444U (ja) * 2005-02-15 2005-06-23 大和特殊株式会社 金属の電解回収装置及び電解めっきシステム
JP2008280594A (ja) * 2007-05-11 2008-11-20 Sumitomo Electric Ind Ltd 金属精錬方法

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8900439B2 (en) 2010-12-23 2014-12-02 Ge-Hitachi Nuclear Energy Americas Llc Modular cathode assemblies and methods of using the same for electrochemical reduction
US9017527B2 (en) 2010-12-23 2015-04-28 Ge-Hitachi Nuclear Energy Americas Llc Electrolytic oxide reduction system
WO2012087398A1 (fr) * 2010-12-23 2012-06-28 Ge-Hitachi Nuclear Energy Americas Llc Systèmes de distribution d'énergie d'anode-cathode et procédés destinés à les utiliser pour une réduction électrochimique
JP2014501330A (ja) * 2010-12-23 2014-01-20 ジーイー−ヒタチ・ニュークリア・エナジー・アメリカズ・エルエルシー 電気化学還元用のアノードカソード電力分配システムおよびその使用方法
US9920443B2 (en) 2010-12-23 2018-03-20 Ge-Hitachi Nuclear Energy Americas Llc Modular cathode assemblies and methods of using the same for electrochemical reduction
CN103261488A (zh) * 2010-12-23 2013-08-21 通用电气-日立核能美国有限责任公司 阳极-阴极功率分配系统和使用其用于电化学还原的方法
US8771482B2 (en) 2010-12-23 2014-07-08 Ge-Hitachi Nuclear Energy Americas Llc Anode shroud for off-gas capture and removal from electrolytic oxide reduction system
US8956524B2 (en) 2010-12-23 2015-02-17 Ge-Hitachi Nuclear Energy Americas Llc Modular anode assemblies and methods of using the same for electrochemical reduction
KR101765983B1 (ko) 2010-12-23 2017-08-07 지이-히타치 뉴클리어 에너지 어메리카스 엘엘씨 전기화학적 환원을 위한 애노드-캐소드 배전 시스템 및 그 사용 방법
US8636892B2 (en) 2010-12-23 2014-01-28 Ge-Hitachi Nuclear Energy Americas Llc Anode-cathode power distribution systems and methods of using the same for electrochemical reduction
CN103261488B (zh) * 2010-12-23 2016-09-07 通用电气-日立核能美国有限责任公司 阳极-阴极功率分配系统和使用其用于电化学还原的方法
US8746440B2 (en) 2011-12-22 2014-06-10 Ge-Hitachi Nuclear Energy Americas Llc Continuous recovery system for electrorefiner system
US9150975B2 (en) 2011-12-22 2015-10-06 Ge-Hitachi Nuclear Energy Americas Llc Electrorefiner system for recovering purified metal from impure nuclear feed material
US8882973B2 (en) 2011-12-22 2014-11-11 Ge-Hitachi Nuclear Energy Americas Llc Cathode power distribution system and method of using the same for power distribution
US8598473B2 (en) 2011-12-22 2013-12-03 Ge-Hitachi Nuclear Energy Americas Llc Bus bar electrical feedthrough for electrorefiner system
US8945354B2 (en) 2011-12-22 2015-02-03 Ge-Hitachi Nuclear Energy Americas Llc Cathode scraper system and method of using the same for removing uranium
US8968547B2 (en) 2012-04-23 2015-03-03 Ge-Hitachi Nuclear Energy Americas Llc Method for corium and used nuclear fuel stabilization processing

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