Gold not precipitating after showing with stannous chloride

[M Usmani]

Dear Martijn
Thanks for your reply, yes I have done with complete safety precautions, I have checked waste liquid with stannous chloride it is not showing any thing.
you are right that our ore contain gold, platinum, palladium and Rhodium too, But nothing recovered yet except gold, I have to know how to recover and precipitate it.
is AR dissolve PT, Pd, Rh, Ag all ?
best regards

 

[Yggdrasil]

AR will recover Gold, Platinum and Palladium. To some extent Rh if finely dispersed but minimal Silver due to pacification by AgCl.

The challenge for PGMs is to get them out of solution, cementation will take care of that, but has to be done correctly.

 

[M Usmani]

Thanks for reply
may I precipitate platinum with ammonium chloride and palladium with DEG ?
regards

 

[Yggdrasil]

I guess you mean DMG.
And yes if it is done correctly.

But with low amounts, I would just drop everything with copper after SMB.
There are always losses, micrograms from grams are not too bad, worse from milligrams.
The losses will most likely be around same anyway.

Put the remaining liquids in the stock pot and save the powders from the first cementation for later refining when there are enough to warrant a new run.
When you transfer your stock pot to waste, collect the slimes and add them to the powders from cementation.

 

[M Usmani]

Alright noted well with thanks

 

[Yggdrasil]

Alright noted well with thanks

Have you researched what we mean with stock pot?

 

[M Usmani]

yes stock pot means remaining liquid which we store in a drum for further processing after cementation