Bio-Oxidized Gold Ore Residue
Residue from bio-oxidation pretreatment of refractory sulfide gold ores exposing gold for cyanidation. Gold content reported under HTS 2616.90.00.40. Advanced processing intermediate.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Provide bioleach process validation documents
• Monitor bacterial residues for import health regulations
• Calculate gold exposure efficiency in declarations
Related Products under HTS 2616.90.00.40
Gold-Bearing Pyritic Ore Concentrate
A concentrate derived from pyritic ores containing recoverable gold content, processed to enrich precious metal particles. Classified under HTS 2616.90.00.40 due to its primary gold content as specified in statistical reporting for precious metal ores. Used in gold extraction refineries.
Refractory Gold Ore Concentrate
Concentrate from refractory gold ores requiring high-pressure oxidation or bioleaching for gold recovery due to encapsulation in sulfides. Falls under HTS 2616.90.00.40 for its gold content in precious metal ores category. Primarily imported for advanced refining processes.
Alluvial Gold Gravel Concentrate
Concentrate from placer mining operations consisting of gold-bearing gravel and sands separated by gravity methods. HTS 2616.90.00.40 applies for gold content in other precious metal ores and concentrates. Commonly imported from artisanal mining regions.
Carbonaceous Gold Ore Concentrate
Ore concentrate with gold associated in carbonaceous material, requiring preg-robbing prevention in cyanidation. Classified in HTS 2616.90.00.40 based on gold content as other precious metal ores. Used in specialized CIL/CIP gold recovery plants.
Gold-Telluride Ore Concentrate
Concentrate containing gold in telluride minerals like calaverite, processed via roasting or pressure oxidation. HTS 2616.90.00.40 captures its gold content under precious metal ores. Imported for tellurium co-recovery alongside gold.
Platinum Group Metals Credit Tailings
Tailings from PGM refineries credited for residual gold content, reprocessed for precious metal recovery. Statistical reporting under HTS 2616.90.00.40 for gold content despite PGM presence. Represents secondary gold source material.