some photos of Au powder/process

[Sucho]

almost all of gold on photos was refined from processors
only small amount from cell phones, fingers, industrial gold plated connectors,flatpacks,mainboard connectors

 

[Sucho]

here are photos of Ag refining

everything was refined from old electronics

 

[patnor1011]

Pekna robota.

 

[glorycloud]

Nice!

 

[Acid_Bath76]

here are photos of Ag refining

everything was refined from old electronics

WOW! Motivating!

 

[4metals]

Do you have a picture of your silver cell running? How do you configure the anode?

 

[nch]

Thank you! Nice photos !


@ 4metals I belive that it is only dropping silver whith copper photo, no silver cell!... Maybe I am wrong

 

[hfywc]

what would you say is the best way for you to process computer chips?

 

[Barren Realms 007]

what would you say is the best way for you to process computer chips?

That is too broad of a question to be answered in a direct way. Search the forum and you will find the different processes used.

 

[4metals]

@ 4metals I belive that it is only dropping silver whith copper photo, no silver cell

You are right, when he said refining I assumed he went all the way and that was some fancy high tech cathode laying in the tank. My mistake!!

 

[Sucho]

Yes.that was only precipitated on copper, but twice.

final purity was 997, as i measured my ingots later with InnoX XRF .
i am able to run it in cell, but i dont need higher purity.

i will post some photos of various ingots in few days.

 

[Sucho]

i was trying to refine copper in my experimental cell. you can see working conditions on PS displays. anode and cathode was a copper sheet
electrolyte composition - 30 g/l Cu 2+ and 220 g/l H2SO4 , anode - 5x8 cm , cathode 5x8 cm, A/C ratio 1 : 2, sealing tape was used on sharp cathode edges.

i want to achieve smooth copper deposit on cathodes and avoid fluffy deposit.experiment failed.there was a fluffy deposit on edges and smooth deposit in the middle of cathode.i will try to make it working


first picture - gold button , purity 988 , source - mainly gold plated pins, relays , transistors, etc.

 

[goldsilverpro]

Sucho,

What is your cathode current density - in amps per square inch or per square foot?

 

[Sucho]

as you can see on my power supply, working current is 1.5 Amps. each cathode has 5cm x 8cm.for two cathodes that means 10cm x 8cm = 0.008 square meters
1.5 / 0.008 = 187.5 Amps per square meter. if my square meter to square foot coefficient is good, it is 17.42 Amps per square foot.

 

[Sucho]

contacts were dissolved in nitric acid.it takes about 5 minutes to complete dissolution on medium heat

 

[Sucho]

this is the highest purity of silver that i am able to achieve using copper precipitation. good filtration , distilled water and accurate dilution are required

 

[HAuCl4]

How did you get all the palladium out?.

fwiw: If your main contaminant is copper, leaching the silver powder with ferric chloride, and then washing will increase your silver purity by a factor of 10 to approx 9997. :shock:

I may be wrong, but the photo shows some palladium oxide colors, hence palladium contamination, if I'm not fooled by my old eyes!. :lol:

 

[Sucho]

main contaminant is copper. Pd contamination is lower than 0.1 percent. in my opinion its caused by very low concentration of Pd in source material.
the surface of this mould is nice and shiny silver coloured. i made this photo using my mobile phone.

thanks for your advice how to purify silver powder.

my experience is, that filtration is the most important step. it improve your purity in a range of 12- 8 percent

 

[Sucho]

todays batch. 5,3 kilos of ceramic P1 and AMD K5,K6,K7

 

[glorycloud]

Woo-hoo!!

The fun has begun!!

:lol: