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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If shaped as tiles rather than blocks or shelves
Refractory tiles of alumina composition have dedicated subheading.
If for lower-grade alumina refractories or mixed compositions
Covers other refractory ceramic goods not specified in 6902 subheadings.
If used as electrical insulators
Chapter notes exclude electrical insulators from Chapter 69, directing to Chapter 85.
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Import Tips & Compliance
• Include test reports per ASTM standards showing low water absorption and high firing temp to confirm Chapter 69 eligibility
• Label shipments clearly as 'refractory constructional goods' to prevent confusion with decorative tiles (6907-6914)
• Check for minimum thickness; US note excludes tiles ≥3.2cm thick from certain headings but applies here as refractory
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 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.
High-Alumina Burner Block
Precision-shaped burner port blocks with >60% Al2O3, fired for gas/oil burner installations in reheating furnaces. Refractory constructional goods resisting flame impingement. HTS 6902.20.50.10 for alumina burner refractories.