Outotec supplies well-proven technology for silver electrolysis refining. We can provide our customers with a complete material handling stream including post-electrolysis functions.
In order to separate silver from gold and platinum group metals, Doré anodes are electrolytically processed in new, improved Moebius cells at current densities as high as 1,000A/m2. Silver dissolves in the nitric electrolyte and precipitates as crystals, which are scraped off the stainless steel cathodes. Silver anode slime is collected in bags that surround the anodes. This mud contains gold, platinum metals and silver.
Silver crystals are removed from the Moebius cells simply by flushing the electrolyte through a sieve-tank. They are then washed, dried, melted and cast into bars or granules. The residual silver anode slime containing gold and platinum group metals are taken for further refining and recovery of the metals.