High Grade Circuit Boards Gold Recovery FAILED EXPERIMENT

I will attempt to recover gold and silver from 7 lb high grade circuit boards. I will show most of the process except the chemistry step is where I will loose a lot of gold due to my lack of knowledge and experience, and I do learn a lot from my mistakes to make this step way better in the future projects. DF-40S Hammer Mill Pulverizer: https://amzn.to/3SQxtgV 30-Quart, Stainless Steel Bowl: https://amzn.to/490VTdo DC Power Supply Variable 0-30V 0-20A: https://amzn.to/3wY6OY8 Blue Bowl Concentrator Kit for Gold Recovery: https://amzn.to/3S4y7Hj Table Top RapidFire Pro Metals Melting Furnace: https://amzn.to/3IDRtym Those are affiliate links.