New member

[dana1996]

Hello everyone on this great forum, I'm new here, first time to hear about Hoke's book too.

So far, we were newly trying to urban mining, we had about 1kilo of TV finger strips. Cut out and left only the plated parts. Washed with warm water, added to AR solution 3:1 HCL and nitric acid (53%), left it for about 30mins the AR was dark green and filtered, added urea till released nitric and then SMB (sulfite), very little powder precipitated grey to black color, solution color is like dark green like olive oil and some dark colloids floating on top. What are your advices to my proccess ?? Can I still get any gold? How much gold you think might be found in those TV sticks? Thanks in advance home to accept my first post here.

 

[FrugalRefiner]

Probably not much gold to begin with. TV parts don't get plugged in and pulled out much, so they're lightly plated.

We usually release gold foils with CuCl₂ (AP) leach, then dissolve just the foils in AR.

Don't mix AR according to a ratio. Cover the foils with HCl, then add just enough oxidizer to dissolve the gold.

Don't use urea. Use sulfamic acid to deNO_X.

Your powder is contaminated and your solution is messy because you went directly to AR.

Test your solution with stannous chloride to see if there is any gold left in it. If there is, cement it out in your stock pot.

Dave

 

[goldshark]

Read the extensive quantity of threads on processing e waste. Then ask questions if the subject is not covered.