Electrowinning Seatings for Cathode and Anode

Capping Board – Electrowinning Seatings for Cathode and Anode

Capping Board, also known as electrowinning seatings for cathode and anode, plays a critical role in SX-EW and electrorefining tankhouses.
It provides electrical insulation, precise positioning, and structural stability for both cathode and anode plates, ensuring safe, efficient, and uniform current distribution inside electrowinning cells.

1. Overview

A high-quality capping board directly influences:

Current efficiency
Tankhouse safety
Cathode copper quality
Overall EW plant stability and maintenance cost

2. Key Features

2.1 High Dielectric Strength & Chemical Resistance

Manufactured from premium polymer composite materials, the capping board resists strong acid, corrosion, and long-term high-temperature operation, ensuring stable insulation between the busbar and electrode plates.

2.2 Dimensional Consistency for End-Cell & Inter-Cell Bars

The thickness of the end-cell capping boardand inter-cell conductive bars is designed to be perfectly consistent.
Conductive rods remain precisely horizontal to ensure uniform electrical flow across the tankhouse.

2.3 Busbar Bedding for Higher Production Capacity

Capping board is installed (“bedded”) directly into the busbar, ensuring stable plate positioning so that the cathode plates can immerse fully and accurately into the electrolyte.
→ This helps increase tankhouse loading capacity and boosts the final cathode copper output.

2.4 Modular Plug-in Design for Easy Replacement

A modular plug-in structure prevents total shutdown caused by damage to a single insulating segment.
This significantly reduces maintenance time and improves tankhouse uptime.

2.5 Optimized Busbar Positioning to Reduce Copper Consumption

Accurate bedding reduces unnecessary busbar height and copper usage, helping EW operators save costs without compromising performance.

2.6 Excellent Mechanical Stability

Strong compressive strength and stiffness ensures stable seating even under heavy cathode loads in high-cycle electrowinning operations.

3. Technical Specifications

Parameter	Typical Range
Material	Polymer Composite / Engineering Plastic
Density	1.7–2.2 g/cm³
Dielectric Strength	≥ 18 kV/mm
Heat Resistance	80–120°C
Acid Resistance	Excellent (H₂SO₄, Chloride Environments)
Installation Type	Insert-type / Modular Plug-in
Application	EW & ER tankhouses

4. Quality Verification

Test Reports of Raw Materials for Capping Board:

Test Report
Sample Name	Resin Casting Specification
Report No.	20180574-1
Testing Institution	Shanghai Testing Center, China
Testing Institution	FRP/Composite Materials Industry Testing Point
Model	SWANCOR 901
Sample Receipt Date / Entrustment Date	28-May-18
Testing Period	May 28, 2018 – June 4, 2018
Entrusting Unit	Shangwei New Materials Technology Co., Ltd.
Contact Information of Entrusting Unit	Address: No. 618, Songsheng Road, Songjiang Industrial Zone, Shanghai
Contact Information of Entrusting Unit	Tel: 021-57746183-316
Test Conclusion	The sample has been tested. The measured values of each test item are shown in the attached pages. Declaration: This test conclusion is only technically responsible for the incoming sample.

Frequently Asked Questions

Q1: Can the capping boards be customized for different cell structures?

Yes. Dimensions, thickness, and plug-in design are fully customized to your tankhouse drawings.

Q2: Are the boards resistant to long-term sulfuric acid immersion?

Yes. All materials are tested for acid resistance under strong-acid EW conditions.

Q3: Do you supply matching busbars, insulating boards, or full EW components?

Yes. PRS can supply complete electrowinning furniture, including cathode plates, anode plates, busbars, mist hoods, and insulating boards.

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