Study on Technology of Extracting Silver from Waste Fixing Bath by Replacement Method

摘要

Extracting silver from waste fixing bath by iron replacement method were studied, and the influencing factors of silver recovery is analysized,the best replacement conditions is iron content 3.8g/L,pH 5.5,temperature 40 ,agitation speed 1440r/min, stirring time 30min, under th °C e above conditions,the silver replacement rate can reach 95.6%. And the cost of recovering 1000g silver is 58.6 yuan.