contemporary blue design template - efftech.co.uk · bed of very fine mild-steel wool around a...
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RENOCELL® TECHNOLOGY
PRECIOUS METALS
Anode
Anode
Porous diffuser core
Plast ic Outer Support
Carbon Fiber
P lat ing Element
Cathode Current Feeder
Electrolyte Flow Path
DIN: DRII-6002-1
Post Electrode
Connector
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ELECTRODEPOSITION OF METALS
• 2D cells (i.e. tank or plate-and-frame cells) are suitable for bulk metal removal but cannot meet stringent precious metal recovery/treatment standards
• The electrowinning cells used in the gold mining industry have been derived from the Mintek cell which is rectangular and consists of a series of parallel, alternately placed anodes and cathodes
• Typically the anodes used are fabricated from Stainless Steel wire mesh or punched plate. The cathodes consist of a porous packed bed of very fine mild-steel wool around a cathode current feeder
• Electrowinning development efforts have been directed towards finding high surface area, stationary electrode materials
• Testing shows that low concentrations of metals can only be achieved, with reasonable current efficiencies, by using porous 3D electrodes
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ELECTRODEPOSITION OF METALS
RenoCell performance improvements in
electrochemical cell focused on:
– Obtaining high active cathode surface areas. Allows compact design and efficient conversions, even at low metal concentrations
– High current efficiency to minimize energy usage – High current density to affect rapid metal removal – High mass transport from intimate contact
between electrolyte and electrodes RenoCell platform improvements
– Easy product removal – Safety and ease of control – Lower operating costs
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RENOCELL PATENTED TECHNOLOGY
Cathode current feeder
Anode current feeder
Plastic Mesh
Flow Diffuser
Carbon fibre
plating element
Catholyte flow in
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RENOCELL ELECTROCHEMICAL CELL
•Enclosed Polypropylene Housing
•Cylindrical Anode & Cathode
•Porous 3D Carbon Cathode
•Replaceable Cathode
•Ion-exchange (IX) Membrane Divider Option
•Several Sizes
•Small Footprint U.S. Patent No. 6,162,333
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RENOCELL POROUS CARBON
CATHODE ASSEMBLY
M-500 Cathode:
Diameter = 10 cm
Length = 50 cm
2-D Area = 0.11 m2
3-D Area = ~ 55 m2
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DIVIDED ELECTROCHEMICAL CELLS
Dividers are used to separate the cathode from the anode creating an electrochemical reactor used for advanced applications. Two types of dividers are available: – Porous material. Acts as a physical barrier – Ion-exchange (IX) membranes. Highly selective,
permitting transport only of either cations or anions and accompanying solvent
Cation dividers are used when control is needed for: – anode reactions (e.g., chlorides and chlorine generation) – anode corrosion (e.g., fluorides) – undesirable reactions (e.g., iron ‘shuffle’) – impact of anodic reactants (oxygen)
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PRECIOUS METAL RECOVERY (Divided Cell Configuration)
Anolyte ( Dilute Virgin Acid )
( + ) ( - )
Catholyte (HCl Acid Leach )
H+
Pd++
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SUCCESSFULLY TREATS 20+
HEAVY METALS
• Cadmium • Gold • Copper • Cobalt • Mercury • Nickel • Chromium • Silver • Tin • Palladium • Iron • Lead • Platinum • Zinc • Indium • Arsenic • Osmium • Tungsten • Ruthenium • Rhodium Others (metalloids) being or to be tested
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0
200
400
600
800
1000
1200
1000 100 10 1
Deposition Rate Grams/Hr-m2
Metal Concentration, ppm
Copper (Cu)
Cadmium (Cd)
Silver (Ag)
Gold (Au)
Tin (Sn)
Lead (Pb)
Nickel (Ni)
RENOCELL METAL DEPOSITION RATES
vs. METAL CONCENTRATION (at 300 Amps/m2 2D current density)
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RENOCELL MODULAR SYSTEMS
REMOVAL RATES OF VARIOUS METALS
0
50
100
150
200
250
300
350
400
MX0251 MX0252 MX0501 MX0502 MX0503 MX0504 MX1001 MX1002 MX1003 MX1004
Copper (Cu+2) 10 19 19 39 58 77 39 77 116 154
Cadmium (Cd+2) 5 9 9 19 28 37 19 37 56 74
Silver (Ag+1) 14 27 27 55 82 109 55 109 164 218
Gold (Au+3) 17 35 35 70 105 140 70 140 210 280
Tin (Sn+4) 7 14 14 28 43 57 28 57 85 113
Lead (Pb+2) 24 48 48 95 143 191 95 191 286 381
Nickel (Ni+2) 5 10 10 20 29 39 20 39 59 78
Me
tal R
em
ov
al
Ra
te,
Gra
ms
/Hr
System Model Number
(Based on starting concentration of 1,000 ppm, ending concentration of 1 ppm, and 2D current density of 300 A/m2)
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GOLD & OTHER PRECIOUS METALS
An Au drag-out tank on a
PWB plating machine was
treated. The 265 L tank
produced 112.5g of Au
during a 20 hour RenoCell
M100 test, and is typical
of many industrial
precious metal
applications
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210+ RenoCell Installations
20+ Applications in Industrial Sectors
– Printed Circuit Boards
• Cu from electroless bath
• Cu from dragout
• Au and Pd from dragout
• Ag from rinse water
• Impurities from Cu plating bath
– Metal Finishing
• Cd from rinse water
• Cu from cleaning bath
RENOCELL INSTALLATIONS
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RENOCELL INSTALLATIONS
(continued)
20+ Applications in Industrial Sectors
– Aerospace/Automotive • Cd from rinse water
• Cd from IX regeneration
• Cu and Pb removal from cleaning bath
– Metal Fab • Cleaning bath maintenance (Pb,Cu)
– Precious Metals • Pt, Pd, Rh and Au recovery
• Au from dragout
• PM from mining
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20+ Applications in Industrial Sectors
– Environmental/Effluent treatment • Metals from industrial effluents
• Removal of metals from plating wastes
• Removal of metals from biomass and waste incineration ash
– Recycling • Recovery of silver from photographic waste
• Recover of PGM’s from catalytic converters
• Recovery of PGM’s from electronic waste
• And others
RENOCELL INSTALLATIONS
(continued)
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IN SUMMARY
• RenoCell is the next generation technology for process and waste water metal ion removal and value metal reclamation
• RenoCell products deliver advanced, patented 3-D electrowinning technology incorporated in compact, robust cell and modular system designs
• The principles of electrowinning are the same for all electrochemical cells. However, . . . . .
“RenoCell® technology simply works substantially better”
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if you would like further information
please contact:
EFFTECH
4200 Waterside Centre
Solihull Parkway
Birmingham Business Park
Birmingham
United Kingdom
B37 7YN
Tel: +44 121 289 3117