Aqua Regina Processing

[Sandflea28]

Anyone familiar with retrieving ore from aqua Regina that has been dried to a powder? A friend has some slurry that has been dried to powder, and wants to process the ores, if any, out of it. Would appreciate any reliable advice.

 

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[homefires]

What's to process?

I Bet the gold has been leached out of it.

 

[U.K. Brian]

Sodium meta-bisulphate is used after reverse electroplating to dissolve the remaining metals and leave pure 24 kt gold. If he wants to recover other metals I've not a clue and it might not be economical.

 

[leadnugget]

aqua Regina is some very, very nasty acid.
it can ruin your health or kill you if you don't know what your doing.
there is a very good refining forum here.

http://goldrefiningforum.com/phpBB3/index.php?sid=249b35602a4516d97e647383f4fe1e11

please be careful and dispose of the left over waste properly.