Zircon-Based Refractory Ramming Mass
A dry ramming mix of zircon flour and clay for induction furnace linings, rammed in place for dense structure. Falls under HTS 3816.00.20 as other refractory compositions, resisting molten metal attack up to 1750°C. Key for foundries.
Import Duty Rates by Country of Origin
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If explicitly dolomite-based
Dolomite ramming has specific subheading priority.
If supplied as pre-rammed furnace components
Assembled crucibles/articles are Chapter 69.
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 zircon purity assay (>65% ZrO2) to distinguish from generic mixes
• Use ventilated packaging to prevent dust; comply with IMDG for sea freight
Related Products under HTS 3816.00.20
Andalusite-Based Refractory Guniting Mix
Pneumatic-applied mix with andalusite for wear-resistant coatings in blast furnaces. Classified HTS 3816.00.20 as other refractory compositions, high mullite formation for thermal stability.
Silicon Carbide Refractory Mortar
Abrasion-resistant mortar with SiC grains for cyclone burners and burners. HTS 3816.00.20 other mortars, extreme hardness at 1500°C.
Dolomite-Silica Ramming Mix
Blended ramming for coreless induction furnaces, near 3816.00.10 but 'other' if modified. HTS 3816.00.20.
Bauxite Grain Refractory Concrete
Aggregate bauxite concrete for ladle impact zones.
Mullite Refractory Castable
Synthetic mullite for petrochemical heaters.
Kaolin Clay Refractory Mortar
High-purity kaolin for pottery kilns.