Pyrometallurgy: Roasting, Smelting, Refining & Electrowinning

Pyrometallurgy: Roasting, Smelting, Refining & Electrowinning2017-04-21T02:33:06-04:00
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Brittle Bars (No replies)

aeolson
4 months ago
aeolson 4 months ago

Having some issues with all of a sudden brittle dore bars from our ILR.    The bars used to run about 95% combined Au/g.   However this has dropped to to around 80% with the new actor being pb. Cu is about 4 ppm

On a typical batch we use 6 to 7 kg of flux.  Our current recipe is:

50% Borax, 22% Silica, 14% soda ash and 14% sodium nitrate.

Suggestions/Comments appreciated.

Eric

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