40% FeCl3 and 8% of HCL off the gold on PCB

[hkhogold]

I am using FeCl3 40% and 8 % ofHCl to leaching the PCB
Within 15 % lots of basic metal dissolve into the solution
When I filt solution . I see some of gold foil and some grey dust on the filter. Is that AgCl ?

 

[hkhogold]

Like this pic

 

[Topher_osAUrus]

With it being from a pcb, I'd guess solder (not silver solder).
Tin, lead, maybe some copper I chloride.

 

[hkhogold]

Will report in this few day , around leaching 75 kg of this thing

 

[hkhogold]

Just finish for little gold.

 

[pp2kr]

Very good!!!

 

[hkhogold]

Two day after will refining to pure gold .Still installing the equipment.

 

[hkhogold]

Two of this