PROCEDURE FOR THE RECOVERY OF SILVER IN NON-METALLIC WASTE WITH A HIGH CONTENT OF ORGANIC MATTER

摘要

Silver is recovered from materials with high organic content by (a) carbonisation of the organic material at 400 deg.C (b) chemical reduction of the silver cation by treatment of the previously-soaked residue with NaOH and (c) collection of the finely-divided reduced silver in molten lead.