999.50 degrade to 995 kilo bar we are losing gold

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EMRE

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Apr 17, 2014
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hello all,

just my two cents; I know a Turkish refinery that hand pours kilo gold bars by hand at 995 purity. They measure exactly 1000.15 grams of grain and melt it in the crucible and pour into ingot under inert gas. Excess 0.15 compensates the melt retention on the crucible surface while pouring( which will eventually be reclaimed when the crucible is worn out). You end up with a bar of 1000.05 or so and you polish off the excess. Other than that there is no melt loss during this process. Theft is the likely issue here. They may not even replace it with silver before pouring. I have seen people swallowing grains and collecting them on the way out...
 

EMRE

Well-known member
Supporting Member
Joined
Apr 17, 2014
Messages
59
sasi4gold said:
4metals said:
Are you saying you are losing weight in pouring refined gold into bars?

Or are you retaining the same weight but the assay drops?

Are you assaying by difference and with what instrumentation?

Are you saying you are losing weight in pouring refined gold into bars?
NO
step one - bars to grains all the while no losses

Or are you retaining the same weight but the assay drops?
i am not getting same weight , in 100 kg
he is swallowing grains and pooping them out at home. and I am not kidding...

assay no drops , we are getting same assay

Are you assaying by difference and with what instrumentation?

before the process , glass dip sample
after kilo bar , drilled sample
fire assay - birmingham trained assayer

step one - large bar to covert grains no losses our gold or third party gold
" 2 ) Refined gold or any gold bar convert to grains no losses "
those grains are weighed and adding sufficient silver to degrade
999.50 to 995 , in this step we are losing gold , its happening only in our refined gold.
third party gold bars are no losses.
purity of kilo bars 995 ( if other than the gold evaporated , purity should be increase )
please advise me
Thanks
sasi
 
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