High-Alumina Firebrick
High-alumina firebrick containing over 50% alumina (Al2O3), fired after shaping for high-temperature resistance. Used in furnaces and kilns for lining to withstand extreme heat. Classifies under 6902.20.10.10 as refractory bricks made primarily of alumina.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing >50% siliceous fossil meals like kieselguhr
Siliceous fossil meal-based refractories fall under a separate subheading despite similar brick form.
If other refractory bricks not >50% alumina/silica
Bricks with lower alumina/silica content or different compositions classify in 6903 as other refractory ceramic goods.
If not fired after shaping or used as millstones
Unfired or differently processed ceramic articles exclude from Chapter 69 and may go to Chapter 68.
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Import Tips & Compliance
• Verify alumina content exceeds 50% by weight via certified lab test (ASTM standards) for proper classification
• Provide firing certificates confirming post-shaping firing above 800°C to meet Chapter 69 requirements
• Avoid misclassification as non-refractory ceramics; include end-use documentation for industrial furnace applications
Related Products under HTS 6902.20.10.10
Kiln Car Alumina Brick
Heavy-duty alumina bricks (>50% Al2O3) for kiln car tops and supports in ceramic firing kilns. Provides structural stability at high temperatures post-firing. Classed as alumina refractory bricks in 6902.20.10.10.
Glass Tank Alumina Furnace Brick
Alumina-rich (>50% Al2O3) bricks for glass melting tank furnaces, offering resistance to molten glass corrosion. Refractory constructional ceramics fired after shaping. HTS 6902.20.10.10 specific to alumina bricks.
Phosphate-Bonded Alumina Brick
Refractory bricks using phosphate binders with >50% alumina for improved strength in backup linings. Meets Chapter 69 firing requirements using inorganic nonmetallic materials. Alumina brick classification 6902.20.10.10.
90% Alumina Refractory Brick
Refractory brick composed of 90% alumina for superior thermal shock resistance in high-heat environments. Fired ceramic constructional good shaped for boiler and incinerator linings. Fits 6902.20.10.10 due to high alumina content and refractory brick designation.
Blast Furnace Alumina Brick
Dense alumina bricks designed for blast furnace linings, with >50% Al2O3 for corrosion resistance against molten metal. Refractory ceramic goods fired after shaping per Chapter 69 definitions. Specifically 'alumina' bricks under 6902.20.10.10.
Rotary Kiln Alumina Lining Brick
Specialized bricks with high alumina content for lining rotary cement kilns, resisting abrasion and alkali attack. Fired inorganic nonmetallic ceramic per chapter definition. Imports under 6902.20.10.10 as alumina bricks.