How to Take the Impurities out of Gold | LEAFtv

How to Take the Impurities out of Gold | LEAFtv

Periodically the crucible from the furnace and skim the impurities off the surface of the molten . Stir after each of dross and before returning it to the furnace. Repeat this process until dross stops rising to the surface. Set ore and a small quantity of lead in a cupel. Place the cupel in a blast furnace.

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