| 配方类型： |
METALS AND THEIR TREATMENT |
| 配方说明： |
Reclaiming Silver from Plating Solutions |
| 配方组成： |
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| 配制方法： |
The use of zinc dust is an effective method for silver recovery.
Theoretically, each ounce of zinc will displace almost 4 ounces of silver. However, at least a 50% excess should be added to avoid redissolution of the silver by the free cyanide present in the bath. A simple test for complete precipitation is to immerse a clean penny or piece of copper wire in the solution. If no whitish film of silver deposits in 5 minutes, the reaction may be considered complete. |
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