High Alumina Refractory Bricks
High alumina refractory bricks, composed primarily of aluminum oxide, are fired ceramic products designed to withstand temperatures exceeding 1700°C. They are used in furnace linings and kilns for their superior thermal shock resistance and corrosion resistance. Classified under HTS 6902.90.10 as refractory bricks other than those made from siliceous fossil meals.
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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 containing >50% alumina or silica
Higher alumina/silica content shifts to specific composition subheading within refractory bricks.
If not fired after shaping or for non-refractory use
Chapter notes exclude articles not fired to 800°C+; would fall under other refractory ceramic goods.
If made from natural stone or agglomerated materials
Chapter 69 excludes articles of heading 6804/6806; natural stone-based bricks classify differently.
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Import Tips & Compliance
• Verify chemical composition meets refractory standards (min. 45% alumina) with lab test certificates to avoid misclassification
• Ensure documentation proves firing temperature above 800°C as per Chapter 69 notes
Related Products under HTS 6902.90.10
Magnesia Chrome Refractory Bricks
Magnesia chrome refractory bricks combine magnesium oxide and chromite for extreme resistance to basic slags in steelmaking furnaces. These fired ceramic bricks maintain structural integrity at temperatures up to 2000°C. HTS 6902.90.10 covers such 'other' refractory bricks excluding siliceous types.
Insulating Firebrick (IFB) 26 Grade
IFB 26 grade insulating firebricks feature low thermal conductivity due to high porosity, fired from clay-kaolin mixes for backup furnace insulation. Service limit around 1430°C makes them ideal for energy-efficient linings. HTS 6902.90.10 applies to these lightweight refractory bricks.
Chrome-Magnesite Refractory Bricks
Chrome-magnesite refractory bricks blend chrome ore with dead-burned magnesite, fired for superior resistance to ferrous slags in electric arc furnaces. They offer balanced properties for steel ladle linings. Covered by HTS 6902.90.10 for composite refractory bricks.
Andalusite Refractory Bricks
Andalusite refractory bricks incorporate mullite-forming andalusite for excellent thermal shock resistance in coke ovens and reheat furnaces. Fired ceramic structure ensures dimensional stability. HTS 6902.90.10 captures these non-siliceous specialty bricks.
90% Alumina Refractory Bricks
90% alumina refractory bricks deliver premium purity for critical zones in aluminum smelters and cement kilns, resisting molten metal and alkali corrosion. High fired density ensures longevity. Standard 'other' classification under HTS 6902.90.10.
Silimanite Refractory Bricks
Silimanite refractory bricks use high-alumina sillimanite minerals for creep-resistant performance in glass tank regenerator checkers. Their fired structure handles 1600°C+ with minimal deformation. HTS 6902.90.10 for these aluminosilicate bricks.