Pyrometallurgy: Roasting, Smelting, Refining & Electrowinning

Pyrometallurgy: Roasting, Smelting, Refining & Electrowinning

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Silver electrolysis (1 reply)

2 years ago
Silverhair 2 years ago

I have 26 kg of pure silver nitrate I am going to make to metal using aluminum, copper or zinc metal. Which solution is easiest to dispose of safely? I want to refine the silver sludge using electrolysis. Will I have to dry it and melt it into an electrode? Also I only have a car battery charger as a power source. Is this feasible?  Can I add an external resistor to lower the current? Thanks. Any tips welcome! Alternatively, anyone want to buy the AgNO3 crystals?

Wieslaw Wodecki
2 years ago
Wieslaw Wodecki 2 years ago

Pure AgNO3 is already suitable for electrolysis without reducing silver with Zn, Cu, Al. 1H18N9T steel electrodes or similar. Voltage below 5V, preferably 0.5-2V.
AgNO3 solution must be acidified with HNO3 to pH 4-5.
You can also make pure silver from nitrate by reduction with hydrazine N2H4 x H2O. Note here !!!
It foams very much - you need a large vessel so that the foam does not escape, because there will be losses.
Good luck!
P.S. I would like to buy AgNO3, but due to the transport to Europe (Poland) it would be unprofitable

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