Benefits of Comprehensive Utilization of PCB Plating Waste Liquid
Investing in the comprehensive utilization of PCB plating waste liquid can lead to cost savings and reduced expenses. The waste liquid generated from the chemicals used in PCB plating processes can be repurposed for further chemical production, minimizing losses from discharge and contributing to pollution prevention efforts.
Recycling Technology for Precious Metals in PCB Board Electroplating Waste Liquid
- Gold Recovery: Gold, known for its stability and valuable properties, can be efficiently recovered from PCB board waste liquid through a recycling process.
- 1. Recycling Process:
- Pickling and Water Washing: Gold powder is treated with hydrochloric acid to remove impurities.
- Reduction: Gold ions are reduced using ferrous chloride solution, resulting in the precipitation of gold powder.
- Melting and Casting: The gold powder is melted and cast into ingots for further use.
- Drying: The gold powder is dried to obtain granular gold slag.
- 2. Gold Plating Solution Treatment: Adjusting the pH and adding zinc powder to precipitate gold for recovery.
- 3. Gold Precipitation Process: Evaporating the solution to obtain gold precipitate for further processing.
- 4. Defective Gold Plating Removal: Consider re-plating defective gold plating or use an alkaline stripping solution for removal.
Efficiently managing PCB plating waste liquid not only benefits the environment but also contributes to cost-effective and sustainable practices in the electronics industry.
