Does copper only knock out gold or does it also knock out silver?

[ólom]

When you copy posts, add them in a quote so we see where and who it comes from.

Ok and thanks for your help!

 

[Yggdrasil]

Yes, I will want to sell it, but not yet, but when there are more. Can it be calcined together with the filter paper? I remember that the book says not to calcine together with the filter paper.

I rechecked the book now and it says that you should not burn the paper, no explanation on why, but remember she was writing for jewelers and they try to avoid brittle metal at all cost.

 

[Golddigger76]

I have had best results cementing platinum and palladium with copper powder, heat, and either stirring with magnetic stirrer or strong air bubbling through solution.

 

[ólom]

I rechecked the book now and it says that you should not burn the paper, no explanation on why, but remember she was writing for jewelers and they try to avoid brittle metal at all cost.

I rechecked the book now and it says that you should not burn the paper, no explanation on why, but remember she was writing for jewelers and they try to avoid brittle metal at all cost.

I understand and thanks again for your help!

 

[ólom]

Is this pewter block worth dealing with? 16.5 kg. I took it out of this machine, the machine no longer works. I think this machine burned the parts off printed circuit boards.

 

[4metals]

It is hard to speculate about what may or may not be in this block you showed in the photo. It is also difficult to see what the machine it came from actually did, and how it did it. If the parts were dipped in a pool of molten metal and that is what the block is comprised of, drill a few small holes and try to dissolve the metal sample in half nitric half distilled water. Residue from this will contain any gold if it was there to begin with.

 

[ólom]

It is hard to speculate about what may or may not be in this block you showed in the photo. It is also difficult to see what the machine it came from actually did, and how it did it. If the parts were dipped in a pool of molten metal and that is what the block is comprised of, drill a few small holes and try to dissolve the metal sample in half nitric half distilled water. Residue from this will contain any gold if it was there to begin with.

Thank you for your answer! I will try the method!