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2205 Duplex Stainless Steel Cathode for Copper Refining
In the modern electrorefining of scrap copper, the quality of the starting sheet determines the purity of the final cathode. PRS provides premium 2205 duplex stainless steel cathode plates, specifically engineered to withstand the harsh acidic environments of electrolytic cells while maintaining superior electrical conductivity.
Why 2205 Duplex Steel?
While 316L was once the industry standard, modern refineries are upgrading to 2205 duplex stainless steel due to its advanced metallurgical properties:
- Exceptional Corrosion Resistance:Superior resistance to pitting and crevice corrosion in hot sulfuric acid electrolytes.
- High Mechanical Strength:The duplex structure provides double the yield strength of standard austenitic steels, preventing plate warping and deformation.
- Optimized Surface Finish:A precision-polished “2B” surface ensures easy stripping of the deposited copper while maintaining the necessary adhesion during the growth cycle.
- Extended Service Life:Designed for a 10-15 year lifespan, significantly reducing the Total Cost of Ownership (TCO) for EPC projects.
Structural Components & Specifications
- High-Conductivity Hanger Bar
The hanger bar is the electrical lifeline of the cathode. We offer multiple configurations:
- Solid Copper Bar:For maximum conductivity.
- Stainless Steel Clad Copper:Combining the strength of steel with the low resistance of copper.
- CO-Extrusion Bars:Ensuring zero-void contact between materials for minimal voltage drop.
- Specialized Edge Strips
To prevent copper from growing around the edges, our plates are equipped with high-temperature, chemical-resistant plastic edge strips. These strips are mechanically fastened and sealed to ensure easy vertical stripping.
- V-Groove Precision
A precision-machined V-groove at the bottom of the plate guides the copper growth and facilitates a clean break during the automated stripping process.
Frequently Asked Questions
Q1: Can 2205 plates be used in both ER and EW processes?
A: Yes. Whether you are conducting the electrorefining of scrap copper (ER) or copper electrowinning (EW), the 2205 material provides the necessary durability against various acid concentrations.
How does the surface finish affect copper quality?
A: A surface that is too rough makes stripping difficult, while a surface that is too smooth can cause the copper to fall off prematurely. Our plates are polished to a specific RA value to balance adhesion and release.
Q3: What is the lead time for large EPC projects?
A: Depending on the quantity and customization of the hanger bars, we typically ship within 45-60 days to ensure your refinery project stays on schedule.
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