Alumina Refractory Checker Brick
Interlocking 'checker' bricks of calcined alumina for regenerative heat exchangers in glass furnaces, fired to optimize heat recovery. Constructional refractories >50% Al2O3. Classified HTS 6902.20.50.10.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If other ceramic laboratory ware
Lab applications shift to porcelain/china categories.
If natural alumina minerals
Raw minerals not fired/shaped excluded from Chapter 69.
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Import Tips & Compliance
• Provide heat capacity and thermal shock test data supporting refractory use
• Shipped sets considered single articles if matching patterns per US notes
• Avoid Chapter 84 if not furnace subcomponents
Related Products under HTS 6902.20.50.10
High-Alumina Refractory Firebrick
A refractory brick composed of over 50% alumina (Al2O3), fired after shaping to withstand extreme temperatures above 1700°C. Used primarily in industrial furnaces and kilns for lining to protect against molten metal and slag corrosion. Falls under HTS 6902.20.50.10 as a refractory ceramic constructional good containing predominantly alumina.
Alumina Refractory Kiln Shelf
Flat, fired ceramic shelf made predominantly of alumina for supporting pottery in high-temperature kilns up to 1800°C. Designed as a constructional component in kiln interiors to resist thermal shock and chemical attack. Classified under HTS 6902.20.50.10 due to >50% alumina content and refractory properties post-firing.
Alumina Lining Brick for Steel Ladles
High-purity alumina bricks (>70% Al2O3) fired for use in lining steel melting ladles, resisting molten steel erosion at 1600°C+. Essential constructional refractory for metallurgical furnaces. HTS 6902.20.50.10 applies for alumina-dominant refractory bricks/blocks.
Fused Alumina Refractory Block
Dense blocks of fused alumina (Al2O3 >90%) fired and shaped for blast furnace hearths, offering superior abrasion resistance. Used in heavy industrial construction for high-wear zones. Meets HTS 6902.20.50.10 as 'other' alumina refractory constructional goods.
Alumina Refractory Anchor Brick
Specialized hooked bricks of high-alumina content for anchoring fiber modules in furnace linings, fired to endure thermal cycling. Constructional refractory for insulation systems in boilers. HTS 6902.20.50.10 for pure alumina variants.
Tabular Alumina Refractory Tile
Tiles made from tabular alumina grains, fired for use in rotary kilns and incinerators, providing excellent spalling resistance. Thin constructional elements (<3.2cm per US note) for refractory linings. Fits HTS 6902.20.50.10 as alumina refractory tiles.