Alumina-Silica Refractory Block
Dense refractory blocks with a mixture of over 50% alumina and silica, fired for lining blast furnaces and incinerators. They withstand extreme temperatures and chemical erosion in metallurgical processes. Classified under 6902.20.00 as refractory constructional goods with high alumina-silica content.
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 block contains more than 50% alumina and is not a constructional good
Refractory articles other than constructional goods fall under 6903.
If the block contains more than 50% magnesia, lime or chromium
Basic refractory blocks are classified separately.
If the block is not fired after shaping
Unfired refractory articles are excluded from Chapter 69.
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
• Confirm the block is fired and contains over 50% alumina and silica combined
• Provide a certificate of analysis to the CBSA to prove composition
• Ensure the block is not an electrical insulator, which would fall under heading 8546
Related Products under Tariff item 6902.20.00
70% Alumina Kiln Brick
A kiln brick composed of 70% alumina, designed for pottery and glass kilns, providing superior refractoriness. It is shaped and fired to maintain structural integrity at temperatures exceeding 1700°C, making it a refractory ceramic constructional good.
70% Alumina Refractory Brick
A standard 70% Al2O3 refractory brick fired for use in glass tank regenerator checkers and cement kilns. It is a constructional ceramic good exceeding 50% alumina, meeting the requirements of this tariff item.
70% Alumina Refractory Checker Brick
70% alumina refractory checker bricks are perforated bricks with 70% Al2O3 content, used in regenerator chambers of glass furnaces to promote heat recovery. These high-fired ceramic blocks meet Chapter 69 firing requirements and are classified as refractory constructional goods.
90% Alumina Refractory Brick
A refractory brick composed of 90% alumina for superior thermal shock resistance in high-heat environments. It is a fired ceramic constructional good shaped for boiler and incinerator linings, meeting the requirements of this tariff item.
Alumina Lining Brick for Steel Ladles
High-purity alumina bricks with over 70% alumina, fired for lining steel melting ladles. They resist molten steel erosion at temperatures over 1600°C. Classified under 6902.20.00 as refractory constructional goods for metallurgical furnaces.
Alumina Refractory Anchor Brick
Specialized hooked bricks of high-alumina content for anchoring fiber modules in furnace linings, fired to endure thermal cycling. They are constructional refractories for insulation systems in boilers. Classified under 6902.20.00 as refractory bricks with high alumina content.