Pb Sb Anode Plate for Copper Electrowinning and Electrorefining
The Pb-Sb (Lead-Antimony) Anode Plate is a high-performance insoluble anode widely used in copper electrowinning and electrolytic refining processes. By alloying high-purity lead with antimony, this anode achieves an optimal balance of mechanical strength, corrosion resistance, and electrical conductivity, making it the preferred choice for non-ferrous metal hydrometallurgical operations. It is manufactured through mature hot rolling and cold rolling processes, followed by precision surface treatment, resulting in a flat surface, uniform alloy distribution, and excellent corrosion resistance in acidic sulfate electrolytes.
Introduction to Pb Sb Anode Plate
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Photos of Pb Sb Anode Plate
Data of Performance
| Materials of the Blade | Pb Sb Anode Plate |
| Main Ingredient | Lead (Pb): 90% – 92%; Antimony (Sb): 8% – 10% |
| Effective Plate Area | 2 Square Meters |
| Application for | Copper EW or ER |
| Service Life under Normal Conditions | 5-8 Years |
Core Advantages of Pb-Sb Alloy
High Hardness & Structural Integrity
The addition of antimony to lead is not arbitrary—it is a precise engineering decision. When antimony is alloyed with lead, it forms intermetallic compounds that refine the microstructure, resulting in significantly higher hardness, tensile strength, and creep resistance compared to pure lead.
PRS Pb-Sb alloy anode plates are manufactured through a combination of hot rolling and cold rolling processes, enabling precise calibration, eliminating internal defects, and delivering strong anti-warping performance even under continuous mechanical and thermal stress.
Typical Hardness & Mechanical Benefits:
- Improved Dimensional Stability:Antimony reduces deformation under load, ensuring the anode maintains its shape throughout its service life.
- Higher Tensile Strength:The alloy withstands mechanical stress during handling, installation, and operation without cracking or warping.
- Creep Resistance:Antimonial lead resists gradual deformation under constant mechanical load, which is critical for anodes supporting significant weight in electrolytic cells.
Superior Corrosion Resistance
In copper electrowinning, anodes are constantly exposed to sulfuric acid electrolytes (H₂SO₄ concentrations typically ranging from 150 to 200 g/L). PRS Pb-Sb anodes form a stable, protective conductive oxide layer (primarily PbO₂) on the surface in acidic sulfate electrolytes.
This self-healing oxide layer delivers several key benefits:
- Long Service Life:Under normal electrowinning conditions, PRS Pb-Sb anodes achieve a service life of 4–5 years, significantly reducing anode replacement frequency and lowering overall operation costs.
- Low Corrosion Rate:The protective oxide barrier minimizes further degradation of the base alloy, ensuring consistent performance throughout the operational life.
- Minimal Cathode Contamination:The stable oxide layer reduces lead dissolution into the electrolyte, helping maintain high-purity cathode copper production.
Proven Electrochemical Performance:
- Corrosion resistance has been validated in copper electrowinning environments with high sulfuric acid concentrations.
- The alloy exhibits stable oxygen evolution overpotential, contributing to energy-efficient operation.
- Studies on lead alloy anodes have demonstrated that the protective oxide layer forms reliably, protecting the anode from further corrosion and enabling efficient oxygen evolution.
Excellent Electrical Conductivity
Electrical efficiency is the lifeblood of any electrowinning operation. PRS Pb-Sb anodes are engineered for optimal conductivity:
- The metallurgically bonded copper hanger bar ensures seamless welding, low resistance, and no separation or bulging during use, maintaining consistent electrical contact throughout the anode’s service life.
- Uniform alloy distribution across the plate guarantees even current distribution to all cathodes, preventing localized hot spots and ensuring consistent copper deposition quality.
- The Fermi energy of Pb-Sb alloy has been demonstrated to be higher than that of other lead alloy systems (including Pb-Ag, Pb-Sr, and Pb-Sn), indicating superior intrinsic conductivity.
In summary, Pb-Sb alloy anodes integrate high structural strength, outstanding acid corrosion resistance and stable electrical conductivity. Designed for copper electrowinning, they maintain long service life, minimize cathode contamination, and ensure steady, energy-efficient electrolysis operations.
Pb Sb Anode V.S. Other Lead Alloy Anodes
| Feature | Pb-Sb Anode | Pb-Ca-Sn Anode | Pb-Ag Anode |
|---|---|---|---|
| Primary Application | Copper electrowinning, electrolytic refining | Copper electrowinning (reduced slime formation) | Zinc electrowinning |
| Hardness | High | Medium-High | Medium |
| Corrosion Resistance | Good to Very Good | Very Good | Excellent (zinc sulfate media) |
| Electrical Conductivity | Very Good | Good | Good to Very Good |
| Cost | Low to Moderate | Moderate | High |
| Lead Contamination Risk | Low | Very Low | Very Low |
| Standard Guaranteed Service Life
|
4–5 years | 4–5 years | 2–3 years (Zinc EW only) |
| Extended Service Life
|
5–8 years | 5–7 years | No obvious extension |
*Note: For copper electrowinning, Pb-Ca-Sn anodes can reduce slime formation by up to 40% compared to traditional Pb-Sb anodes, lowering maintenance costs. For zinc electrowinning, Pb-Ag anodes (0.5–1% Ag) are typically preferred due to their superior corrosion resistance in zinc sulfate electrolytes.*
Ordering & Support
How to Place an Order:
- Submit Your Requirements:Provide your application details (coper electrowinning or refining), desired dimensions, antimony content, quantity, and any special requirements.
- Receive Quotation & Drawings:PRS will provide a detailed quotation and custom design drawings for your approval.
- Production & Quality Control:PRS manufactures your anodes with strict quality control and regular production updates.
- Shipping & Installation Support:PRS coordinates global shipping and provides installation guidance as needed.
Technical Support:
- Pre-sales:Custom design consultation and feasibility review.
- During Production:Regular production updates and quality control documentation.
- After-sales:Installation guidance, commissioning support, and ongoing technical assistance.
- Time-tested technology with low operational risk and no production interruptions from anode failure.
- Stable batch quality with strict QC, supporting smooth production. Fully customizable dimensions and alloy ratios for all electrolytic cell designs.
- Optimized design reduces lead content, meeting high-grade cathode copper standards.
- Over 20 years of experience in copper electrowinning EPC projects.
- Global project experience across Africa, South America, and Asia
Why Choose PRS?
- Time-tested technology with low operational risk and no production interruptions from anode failure.
- Stable batch quality with strict QC, supporting smooth production. Fully customizable dimensions and alloy ratios for all electrolytic cell designs.
- Optimized design reduces lead content, meeting high-grade cathode copper standards.
- Over 20 years of experience in copper electrowinning EPC projects.
- Global project experience across Africa, South America, and Asia
More Than Just a Supplier of Anode and Cathode Plates
PRS has a rich experienced engineering and technique team. We can provide EPC services including full process consulting, solution optimization, equipment integration / supply in system and on-site commissioning or remote guiding.
Process Consulting
Our seasoned sales and engineers teams will communicate with you. We are just consultant of your whole EW process, according to your requirements and local conditions.
Drawings Optimization
The senior engineers from PRS can discuss the drawings with you, and provide reasonable suggests to optimize your drawings in maximum according to their rich experience.
System Supply
PRS is able to supply system equipment to you with a full range of crushing – ball milling – flotation – leaching – extraction – electrowinning, including certificates required.
On-site Commissioning
On-site commissioning, guidance and installation are available if in need, and remote guidance service by engineers or technique experts from PRS is also open for you.
