The Nepal Circuit Board Gold Stripping Equipment Site showcases an integrated PCB recycling solution that combines a high-efficiency Motherboard Crushing & Separating Line with a specialized Gold Stripping Machine. This project enables the customer to recover base metals and precious metals from waste PCBs in a clean, safe, and economically viable process.

1. Project Background

The Nepalese customer processes:

• Waste computer motherboards
• Mobile phone boards
• Mixed small electronic PCBs
• Gold-plated components from dismantled devices

Their goals were clear:

• Mechanize PCB crushing and separation
• Improve copper and metal recovery purity
• Efficiently strip gold from gold-plated scraps
• Minimize chemical consumption and emissions
• Build a compact line suitable for limited factory space

Our solution integrates mechanical separation with chemical gold recovery to provide a complete, stable, and high-value recycling operation.

2. On-Site Equipment Configuration

(1) Motherboard Crushing & Separating Line

This system mechanically processes dismantled PCBs to recover copper, aluminum, resin powder, and fiber glass.

Primary Shredding

• Heavy-duty shredder reduces large boards into manageable pieces
• Stable low-speed cutting to minimize dust

Fine Crushing

• Multi-stage crushing to 20–40 mesh powder
• Wear-resistant alloy blades for long life

Airflow Gravity Separation

• Separates lighter non-metal powders from heavier metal mixtures

Electrostatic Separator

• Achieves ≥ 98% metal purity
• Essential for preparing cleaner materials before further gold stripping or refining

This ensures the customer obtains high-purity copper while gold-bearing parts are transferred for chemical recovery.

(2) Gold Stripping Machine

This unit handles gold-plated components from PCBs such as connectors, fingers, and electronic terminals.

• Non-cyanide safe chemical process
• Fast and uniform gold dissolution
• Low reagent usage due to closed-loop chemical circulation
• Includes fume purification system for environmental compliance
• Produces high-purity gold powder ready for refining or melting

The combination of mechanical separation and chemical stripping gives the customer higher total gold yield and cleaner recovered metals.

3. On-Site Operation Results

After commissioning, the Nepal project demonstrated:

• Stable throughput with continuous crushing and stripping workflow
• High metal recovery rate, especially copper and gold
• Dust-free, fume-controlled environment
• Low operating cost and simple daily maintenance
• Smooth performance despite Nepal’s high-altitude climate and voltage fluctuation challenges

The customer reported significantly higher gold recovery compared to their previous manual stripping method.

4. Customer Benefits

Technical Gains

• Automated PCB processing reduces manual labor
• Higher copper and precious metal purity
• Integrated system simplifies material flow

Economic Advantages

• Increased gold recovery value
• Low chemical consumption
• Fast return on investment

Environmental Performance

• Non-cyanide stripping technology
• Negative-pressure dust control
• No wastewater discharge