Non-Chemical Processing boards???????\\\\\\

[goldinsulator]

i have no problem incinerating boards. i have a regulation burn pit. im not suppose to burn plastic but if you pile dry brush on top of it, it burns the smoke. it acts kind of like an after burner. i can spread out a piece of roofing tin and pile up a few hundred pounds at a time and cover it in brush and fire it up.theres never any black smoke like you would imagine. simple to scoop up everything and rinse out the wood ash and run everything left in AP.heck, i may even get some gold back out of it.

How would you process boardss that have gold plate on them ie cell phone boards?

John

 

[Geo]

normally, i give them a soak in hcl to remove as much solder as possible and then rinse in water. next, it goes in the AP tank to remove the gold foils.the foils are then dissolved in hcl/Cl.

 

[goldinsulator]

normally, i give them a soak in hcl to remove as much solder as possible and then rinse in water. next, it goes in the AP tank to remove the gold foils.the foils are then dissolved in hcl/Cl.

What process do you use to remove the varnish to also strip the plated copper layers in the board itself? I have incinerated some but seems like I am burning up the gold plating.

Thanks for the help soon this nob wanna be shall be a small time e-waste precious metal recovering hobbyist.

John

 

[Geo]

there should be NO gold inside the board.there are some "through holes" but they are not under the board substrate. copper traces will be found in some PCB's but not all.

 

[goldinsulator]

i thought the cell phone boards had what looked like burnt gold on the inner layers of copper. maybe it was from the holes