Article | REF: M2396 V1

Silver metallurgy

Authors: Pierre BLAZY, El-Aïd JDID

Publication date: December 10, 2006

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11. Recycling

The situation is highly complex, depending on the sector. The average value of silver recycling is only around 20%, except in the photographic industry, where it reaches 30%. Recycling activities can be grouped under four headings: craft waste, alloy waste, photographic waste and electronic waste. .

11.1 Craft waste

Precious metals are leaded to form a lead alloy. After melting in a cupellation furnace to eliminate the lead, the silver, gold and platinum are cast into anodes, from which the silver is extracted by electrolysis. The waste represented by the "high silver content" goes directly to electrolytic refining.

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