Spent Anode Washing Machine For Copper Refining

The Spent Anode Washing Machine is a specialized automated production line designed for copper electrorefining operations to efficiently process spent anode plates after electrolysis. This comprehensive system integrates mechanical, hydraulic, pneumatic, and electrical control technologies to receive, wash, transport, stack, bundle, and discharge spent anode plates with minimal manual intervention.

With a processing capacity of 350 plates per hour, this machine thoroughly removes electrolyte residue and impurities from spent anodes, preparing them for remelting and recasting. The automated washing, stacking, and bundling process significantly improves operational efficiency while maintaining a cleaner, safer work environment in the electrolysis workshop.

The system features an advanced 4-meter washing chamber with multi-directional spray nozzles, adjustable 400mm plate spacing for optimal cleaning coverage, and a rotating stacking platform that automatically bundles the cleaned plates for easy forklift removal.

The whole line runs continuously in the following sequence, matching the process flow diagram:

1. Anode Feeding
   Spent anodes are placed onto the anode feeding conveyor chain by crane. The conveyor delivers plates to the rotary transfer arm at a steady pace.
2. Transfer & Positioning
   The rotary transfer arm transfers individual anodes to the washing conveyor chain inside the chamber, arranging them at uniform 400mm spacing.
3. Spray Washing
   Anodes pass through the 4-meter sealed washing chamber for multi-angle spray cleaning. Cleaning water is stored in the heated circulating water tank, heated by steam to the set temperature, and pumped to the spray nozzle network. Used washing water flows back to the circulating tank for filtration and recycling, with make-up clean water added automatically.
4. Alignment & Turning
   Cleaned anodes are sent to the gripping & aligning device for position correction, then turned 180° by the anode turning device to enter the stacking section in the correct orientation.
5. Cross Stacking
   The rotary stacking table cooperates with the stacking unit to complete 180° cross-stacking layer by layer, ensuring the stack remains stable and does not topple.
6. Strapping & Discharge
   After stacking reaches the set number of plates, the strapping & discharge unit completes cross-pattern strapping automatically, then delivers the bundled anode stack to the forklift pick-up position.
7. Offloading
   A forklift transports the bundled spent anodes to the remelting furnace area for subsequent recycling.

1. High-Efficiency Washing System

4-meter long washing chamber with strategically positioned spray nozzles provides thorough cleaning. Each washing zone features spray pipes positioned at four angles (upper, lower, left, right) with 60° and 45° fan-shaped nozzles ensuring complete coverage of every plate surface.

2. Optimized Plate Spacing

Adjustable 400mm spacing between plates during washing ensures each anode receives adequate water contact and thorough cleaning. This spacing optimization significantly improves washing efficiency compared to traditional systems.

3. Dual Water Tank Heating System

Maintains optimal washing water temperature for effective electrolyte removal. Side-mounted temperature and level gauges reduce steam impact on instruments, ensuring accurate readings and consistent washing performance.

4. Advanced Mist Elimination

Integrated air ducts and mist eliminators effectively capture water vapor while maintaining proper ventilation. This design reduces fan load and prevents mist overflow into the workshop, creating a cleaner working environment.

5. Premium 316L Stainless Steel Construction

All components in contact with electrolyte solution are constructed from 316L stainless steel, including:

• Washing chamber chains and sprockets
• Collection pans and drainage systems
• Spray manifolds and nozzles
• Structural frames (321L stainless steel with 316L contact surfaces)

This corrosion-resistant construction ensures long service life even in the harsh acidic environment of copper refining.

6. Motorized Rotating Stacking Platform

Variable-speed electric motor drive allows precise speed adjustment based on production requirements. The platform automatically descends to place completed stacks directly onto the output conveyor, streamlining the discharge process.

7. Automated Cross-Bundle Packaging

Integrated strapping system automatically bundles stacked spent anodes in a cross pattern (12 plates per bundle, total weight up to 1000kg), securing them for safe transport and storage.

8. Smooth Chain-Drive Output System

Heavy-duty stainless steel chain conveyor ensures stable, gentle transport of bundled anode stacks to the discharge point for forklift removal.

9. Quick-Change Spray Nozzles

Quick-connect fittings on all spray nozzles enable rapid removal and replacement, minimizing maintenance downtime and facilitating cleaning schedule adherence.

10. PLC-Based Control System

Centralized control cabinet integrates all sensor signals and valve actuations. The user-friendly interface provides real-time monitoring, process control, and diagnostic capabilities for efficient operation.

Q1: How much water does the washing system consume?

A: Water consumption is approximately 5 cubic meters per hour (≤5m³/h) under normal operating conditions. Actual consumption may vary based on washing cycle duration and water pressure settings.

Q2: What washing water temperature is recommended?

A: The dual water tank heating system maintains optimal washing temperature, typically 50-70°C, for effective electrolyte removal. The system includes temperature monitoring and automatic control.

Q3: How many plates are bundled together?

A: The automated bundling system groups 12 cleaned spent anode plates per bundle with cross-pattern strapping. Each complete bundle can weigh up to 1000kg depending on plate dimensions and residual copper content.

Q4: What materials are used in the washing chamber?

A: All components exposed to electrolyte solution are constructed from 316L stainless steel for maximum corrosion resistance. The structural frame uses 321L stainless steel with 316L contact surfaces, ensuring durability in the acidic washing environment.

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