Blast Furnace Alumina Brick
Heavy-duty alumina brick (>50% Al2O3) for blast furnace hot blast stove checker chambers. Refractory properties resist slag erosion and high thermal loads. Classified in 6902.20.10 as high-alumina refractory brick.
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More Specific Codes
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing >30% chromite
Chromite refractories have dedicated heading 6903.10.
If imported as unfired shapes
Chapter requires firing after shaping; unfired are chemical preps.
If for general building, not refractory use
Non-refractory ceramic construction goods use 6904.
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Import Tips & Compliance
• Certify compliance with ISO 10081 for high-alumina refractories
• Declare precise dimensions to confirm 'brick' vs 'block' classification
• Watch for anti-dumping duties on Chinese-origin high-alumina bricks
Related Products under HTS 6902.20.10
High-Alumina Refractory Firebrick
High-alumina refractory firebrick containing over 50% alumina (Al2O3), fired after shaping for high-temperature resistance. Used in furnaces and kilns for lining to withstand extreme heat without deforming. Classifies under 6902.20.10 as refractory bricks with predominant alumina content.
Silica-Alumina Refractory Brick
Refractory brick with >50% combined silica (SiO2) and alumina, engineered for blast furnace linings. Fired ceramic construction withstands thermal shock and corrosion from molten materials. Falls under 6902.20.10 for high-silica/alumina refractory bricks.
70% Alumina Kiln Brick
Kiln brick composed of 70% alumina for pottery and glass kilns, providing superior refractoriness. Shaped and fired to maintain structural integrity at 1700°C+. HTS 6902.20.10 applies to alumina-dominant refractory bricks.
Insulating Alumina Refractory Brick
Lightweight insulating brick with >50% alumina and porous structure for furnace backup insulation. Fired ceramic retains low thermal conductivity at high temps. 6902.20.10 for high-alumina refractory bricks.
Chrome-Alumina Refractory Brick
Direct-bonded chrome-alumina brick (>50% Al2O3 with chromic oxide) for glass furnace regenerator checkers. Exceptional corrosion resistance to glass melts. Classifies 6902.20.10 despite chrome, as alumina primary.
Steel Ladle Alumina Brick
High-purity alumina brick (>60% Al2O3) for steel ladle impact pads and purge plugs. Fired to resist molten steel and slag penetration. 6902.20.10 for steelmaking refractory bricks.