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High copper refining Flux recipe (1 reply)

sarchery
3 weeks ago
sarchery 3 weeks ago

Is there a specific flux recipe or extra additive that has been tested to improve the fineness of the gold bars that contain high copper content during smelting.

The current flux constituents are borax, silica and potassium nitrate

David
3 weeks ago
David 3 weeks ago

Try adding 5% feldspar.

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