alexxx
Well-known member
I am posting here since the recovery method I use is pretty much the same as cupellation.
I have bought a few big bone ash cupels from Legend to recover PM from Pb - Ag alloyed pucks
The pucks contain approx the following
Pb 60%
Ag 30%
Au 7%
Pd 2%
Other base metals 1%
As I dont have a muffle furnace, I am curious to know if I can use a direct flame, in open air, to melt the alloy so the pb can be absorbed by the cupel. I have a propane torch and a oxy / acetylene torch.
I am aware of the dangers from the pb fumes.
What type of torch should I use ?
Any danger of damaging the cupel if using a torch?
Any chance I could lose values if heating too much ?
Anything am I missing ?
I have bought a few big bone ash cupels from Legend to recover PM from Pb - Ag alloyed pucks
The pucks contain approx the following
Pb 60%
Ag 30%
Au 7%
Pd 2%
Other base metals 1%
As I dont have a muffle furnace, I am curious to know if I can use a direct flame, in open air, to melt the alloy so the pb can be absorbed by the cupel. I have a propane torch and a oxy / acetylene torch.
I am aware of the dangers from the pb fumes.
What type of torch should I use ?
Any danger of damaging the cupel if using a torch?
Any chance I could lose values if heating too much ?
Anything am I missing ?