ZINC METAL GRANULAR
ZINC METAL GRANULAR, Zinc Dust, Zinc Powder
Method Precipitate the GOLD with sodium metabisulfite/ zinc :
Recover gold from Filings, Setting, Waste water, Consumables used in production, Emery papers, and sweeps from the production floors then dissolve into aqua Regia solution, Let it work 1 night or simply heat it up for a while to shortened the process and on filtration precipitate it. Filter the solution and neutralize it with Urea or just heat it up until all of the nitric vaporized. Watch out not to lose any precious metal during the heating. Test the pH. Precipitate gold using sodium metabisulfite / ferrous sulphate / zinc.
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