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Refining gold


#1

Is there any easy way to take some 14kt gold and refine it to
22kt? Dave

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#2
Is there any easy way to take some 14kt gold and refine it to
 22kt?  Dave

Add 24k.


#3
Is there any easy way to take some 14kt gold and refine it to
22kt?  Dave

Sure.

Weigh the 14k, determine the weight of the components
(Au/Au/Cu), add the Ag and Cu weights together, work out what the
22k final wt would be for that amount of Ag/Cu, add 24k gold up
to that weight.

Melt and pour. What are you like at melting? I’ll assume you can
do that. Here’re my little quirky ways. I prefer to physically
clean the 14k (remove oxides, solder, etc) - not to pickle as it
can add sulphur to the melt. I’d also add a touch (less than 1%)
of copper-phos just prior to pouring to deoxidise what gets in
during the melt-up. Melt quickly, probably melt the 14k first
then add the 14k as the 24k has a higher liquidus. Pour into a
pre-heated steel and waxed mold - or into a diaper sling in a
bucket of water (Satsuo-Ando method).

Regards
Brian
B r i a n � A d a m J e w e l l e r y E y e w e a r �
@Brian_Adam1 ph/fx +64 9 817 6816 NEW ZEALAND
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