Zircon-Based Refractory Ramming Mass
Zircon-based refractory ramming mass is a dry mix of zircon flour and clay, rammed in place to form dense linings for induction furnaces. It falls under 3816.00.00 as a refractory composition, resisting molten metal attack up to 1750°C and providing a durable furnace lining.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
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 the zircon is imported as unprocessed ore or sand
Raw zircon ore is a mineral of chapter 26, not a refractory composition.
If the mix is for non-refractory foundry use
Non-refractory foundry preparations fall under prepared binders.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Ensure the ramming mass is a prepared mix, not raw zircon sand, to stay under 3816.00.00
• Provide a certificate of analysis for zircon content if the CBSA requests it
• Check if the product contains any binders that require special handling documentation
Related Products under Tariff item 3816.00.00
Alumina-Silicate Patch Refractory Mortar
Alumina-silicate patch refractory mortar is a quick-setting, trowel-applied mortar formulated with mullite and clay for patching cracks in rotary kilns. It withstands temperatures up to 1550°C and offers rapid dry-out capabilities, making it suitable for cement plant maintenance. This product falls under tariff item 3816.00.00 as a refractory mortar other than products of heading 38.01.
Andalusite-Based Refractory Guniting Mix
Pneumatic-applied mix with andalusite for wear-resistant coatings in blast furnaces. This product is a refractory composition other than dolomite ramming mix, falling under tariff item 3816.00.00, and is not a product of heading 38.01.
Andalusite-Based Refractory Gun Mix
Andalusite-based refractory gun mix is a gunning refractory containing andalusite, designed for repairs in aluminum reduction cells. Its needle-like crystals enhance mullite formation, providing thermal shock resistance up to 1500°C. This product is classified under tariff item 3816.00.00 as a refractory composition other than products of heading 38.01.
Andalusite Clay Refractory Mortar
Andalusite clay refractory mortar is a mortar using andalusite clay for thermal shock resistance in glass tank regenerator checkers. It is classified under 3816.00.00 as a refractory mortar, withstanding high temperatures and thermal cycling in glass manufacturing.
Basic Dolomite Ramming Mix
A refractory composition primarily consisting of dead-burned dolomite, used for ramming induction furnace linings in steelmaking. This product is a dolomite ramming mix, which is explicitly included in tariff item 3816.00.00, and is not a product of heading 38.01.
Basic Refractory Gunning Concrete
Basic refractory gunning concrete is a magnesia-spinel based dry gunning mix used for repairs in basic oxygen furnaces. It resists basic slags up to 1750°C due to its high lime and magnesia content, and is applied via high-velocity gunning equipment. This product falls under tariff item 3816.00.00 as a refractory concrete other than products of heading 38.01.