Capacitors for refining gold and silver

Which is better cyanide-free gold stripping agent for chip capacitors?

For chip capacitors with high content silver and palladium, it is better to independently use acid process to refine silver palladium, while for the gold-filled circuit board and plug-in components, it’s better to adopt cyanide-free environmental gold stripping agent for fast plating stripping.

Can multilayer ceramic capacitors be used to recover precious metals?

Present paper reports an application oriented approach to recover precious metals such as silver (Ag) and palladium (Pd) from multilayer ceramic capacitors (MLCCs) of waste printed circuit boards (PCBs). These capacitors are being widely used in modern electronic gadgets to provide advance features as well as to enhance their performance.

How is gold treated in a silver cell?

The residue from the silver-cells, together with crude gold bullion, is treated in cells having a chloride electrolyte. These produce fine gold and leave a residue containing silver chloride. The latter is reduced to the metallic state with zinc and is then treated in the silver-cells.

What happens when a capacitor disintegrates?

At this point most of the capacitors will disintegrate and the solution will turn to a purple suspension, which is the reaction between the Tin chloride, Nickel and other compounds. Siphon the purple liquid to the waste solution container and test it for precious metals presence.

Which electrolyte is used to produce gold?

Bullion containing silver is treated in cells charged with a nitric electrolyte. These cells produce fine silver and leave a residue rich in gold. The residue from the silver-cells, together with crude gold bullion, is treated in cells having a chloride electrolyte. These produce fine gold and leave a residue containing silver chloride.

How do you remove silver from anodes?

The silver in the anodes forms at the anodes insoluble silver chloride, a part of which, in the first set of cells, is removed at intervals by taking out the anodes and brushing and jarring off the silver chloride into an earthenware jar. Most of the silver chloride, however, drops to the bottom of the cells.