115,177 views
The video shows the process of recycling a mix of microcircuits from personal computer equipment - motherboards, audio cards, video cards, etc. In these electronic components, in addition to non-ferrous metals, there are precious metals such as gold and silver. The recycling process includes - roasting, crushing and grinding, then treatment with nitric acid in order to transfer copper and silver into a solution, and then treatment with a mixture of hydrochloric acid with nitric (aqua regia), transfer of the contained gold hairs into a solution, then the operation of filtering and restoring the precious metal from the solution, after repeated washing with water, drying and melting into a gold bead.../