FIELD: metallurgy, in particular, silver affinage. SUBSTANCE: method involves providing leaching with sulfite-ammonia solution and thermal settling of silver from solution. Alkali is added to solution before thermal settling process and reducer is added after thermal settling process. Sulfate of hydroxylamine is used as reducer. Thermal settling is effectuated for at least one hour. EFFECT: increased silver extraction extent. 2 cl, 1 tbl
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Authors
Dates
2002-07-20—Published
2000-09-11—Filed