Electrowinning Silver Dore Bars from Mexico
Dore bars from electrowinning cells in silver heap leach operations, impure with 80% Ag and 15% Au. Unwrought form under HTS 7106.91.10.20 due to silver predominance and lack of full refinement. Used by mints and refiners.
Duty Rate — Mexico → United States
0%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
Import Tips
• Include process flow diagrams in entry docs to verify electrowinning origin
• Separate cathode dore from anode slimes to avoid 7112 classification
• Beware FTZ procedures for refiners – must exit as classified product