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Dore Silver Refining Process

     

Sodium Chloride Precipitation Method:

Strictly speaking, this process is utilized for recovering silver from wasted electrolyte solutions rather than purification. It entails using sodium chloride to react with silver nitrate and precipitate silver chloride, thereby separating silver from other impurities. The precipitated silver is then reduced into silver powder using agents such as hydrazine, iron powder, and zinc powder. This silver powder is subsequently reacted with nitric acid to generate the corresponding silver electrolyte. Currently, many smelters employ this method.

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