High-Alumina Refractory Firebrick
A refractory brick containing over 50% alumina (Al2O3), fired after shaping for high-temperature resistance in furnaces and kilns. Classified under HTS 6902.20.10.20 as 'other' bricks made from alumina-silica mixtures, designed for constructional use in industrial heating equipment. Meets Chapter 69 requirements for fired ceramic goods excluding those in headings 6901-6903.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing >50% siliceous fossil meals like kieselguhr
Siliceous earth-based refractories are classified separately in 6902.10 before alumina-silica compositions.
If containing >50% chromite or magnesite
Refractory bricks with other oxides like chromite shift to heading 6903, excluding alumina-silica mixtures.
If not fired after shaping or used as non-constructional articles
Unfired or non-constructional ceramic fiber products fall under Chapter 68, not fired refractories of Chapter 69.
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Import Tips & Compliance
• Verify chemical composition certificate showing >50% Al2O3 or SiO2 to confirm classification under 6902.20
• Provide firing temperature documentation (>800°C) to distinguish from non-fired ceramic articles excluded from Chapter 69
• Avoid common pitfalls like importing unshaped mixes, which fall under Chapter 28 chemicals rather than finished refractory goods
Related Products under HTS 6902.20.10.20
Alumina-Silica Refractory Brick for Steel Ladles
Dense refractory brick with >50% combined Al2O3 and SiO2, engineered for lining steel ladles in metallurgy. Falls under HTS 6902.20.10.20 as 'other' bricks for high-heat industrial construction, fired to withstand molten metal exposure. Excludes basic siliceous fossil meal products per hierarchy.
70% Alumina Refractory Brick
Standard 70% Al2O3 refractory brick fired for use in glass tank regenerator checkers and cement kilns. HTS 6902.20.10.20 covers 'other' bricks exceeding 50% alumina or silica, as constructional ceramic goods per Chapter 69 notes. High thermal shock resistance defines its refractory application.
Silica-Alumina Backup Refractory Brick
Backup layer refractory brick with balanced >50% SiO2-Al2O3 for furnace hot repair and lining support. Classified in HTS 6902.20.10.20 as 'other' non-fossil meal bricks, fired ceramic constructional goods for industrial refractories. Provides insulation behind wear-resistant hot face bricks.
High-Duty Alumina Refractory Brick for Incinerators
High-duty brick with >60% Al2O3 for waste incinerator walls, fired to Chapter 69 standards. HTS 6902.20.10.20 'other' bricks exclude siliceous earths, focusing on alumina-silica for extreme heat construction. Resists chemical erosion from combustion byproducts.
Phosphate-Bonded Alumina Refractory Brick
Phosphate-bonded brick exceeding 50% Al2O3, fired for abrasion resistance in rotary kilns. HTS 6902.20.10.20 as 'other' constructional refractory bricks per Chapter notes on inorganic nonmetallic firing. Bonds enhance strength without compromising refractoriness.