refining gold problems
- Thread starter newguy
- Start date
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Platinum metals pose no problem in cupels.
What do you have in the cupel?
Describe in detail please.
i have a prill from smelting ore with flux's at about 1250 . i belive i half assed scorification with only 2 to 1 lead and cupelled at about 860
removing the value, its brittle and theres a rose color powder and gold flakes. some cupells come out with red arms. amazon test stuff says 22k or better, also platinum. so im not getting solid metal.
There should be no flux in a cupel.
It beats the purpose of the cupel.
Cupelling needs the correct temperature and plenty of air to drive the oxide into the cupel.
Did you use Lead or Bismuth as collector metal?
Aah saw it now, sorry just woke up.
Are you talking C or F here.
Are you using an electric or gas fired kiln?
Too little details.
For instance are your button clean metal?
Martijn
Well-known member
That looks like a alumina crucible to me, not a cupel. What is it exactly?
what do you base the Pt guess on?
