Zinc content
Zinc ores and concentrates > Zinc content
Duty Rate (from China)
Effective with respect to entries on or after September 27, 2024, articles the product of China, as provided for in subdivision (b) of U.S. note 31 to this subchapter
Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Products classified under HTS 2608.00.00.30
Zinc Blende Ore Concentrate
A concentrated form of zinc blende (sphalerite) ore, primarily sphalerite mineral with 40-50% zinc content after beneficiation. Classified under HTS 2608.00.0030 as zinc ores and concentrates, reporting the assay zinc content statistically. Used mainly for zinc metal extraction in smelters.
Willemite Zinc Ore Concentrate
Concentrate derived from willemite (Zn2SiO4) ore, a silicate zinc mineral with approximately 45% zinc content post-flotation. Falls under HTS 2608.00.0030 for zinc ores, with zinc content reported statistically. Primarily imported for roasting and leaching in zinc production.
Smithsonite Calamine Zinc Ore
Carbonate zinc ore concentrate from smithsonite (ZnCO3), known as calamine, with 35-50% zinc content after processing. HTS 2608.00.0030 applies to its zinc ore classification, assay quantity reported. Imported for hydrometallurgical zinc recovery.
Hemimorphite Zinc Silicate Concentrate
Flotation concentrate of hemimorphite (Zn4Si2O7(OH)2·H2O), a zinc silicate ore averaging 42% zinc. Classified in HTS 2608.00.0030 under zinc ores and concentrates, with zinc content statistically noted. Used in specialized leaching processes for zinc.
Zinc-Lead Sulfide Mixed Concentrate
Mixed flotation concentrate from polymetallic ores like Broken Hill type, with 30% zinc and minor lead, classified by principal zinc content under HTS 2608.00.0030. Zinc assay reported statistically for trade stats. Sent to complex smelters for separation.
Roasted Zinc Ore Sinter
Partially roasted sphalerite concentrate forming sinter with 50%+ zinc content, still considered ore under HTS 2608.00.0030 before full smelting. Zinc content assayed and reported. Intermediate product for electrolytic zinc plants.
Hydrothermal Zinc Ore Concentrate
Concentrate from hydrothermal vein deposits, mainly sphalerite with 45% zinc, under HTS 2608.00.0030 for zinc content reporting. High-grade ore from deposits like Red Dog mine. Ideal for conventional roast-leach-electrowin processing.