Other
Refractory bricks, blocks, tiles and similar refractory ceramic constructional goods, other than those of siliceous fossil meals or similar siliceous earths: > Containing by weight more than 50 percent of alumina (Al2O3), of silica (SiO2) or of a mixture or compound of these products: > Other
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Subheadings
Products classified under HTS 6902.20.50
High-Alumina Refractory Firebrick
High-alumina refractory firebricks containing over 50% Al2O3, fired after shaping for use in high-temperature furnaces and kilns. These bricks provide excellent thermal shock resistance and corrosion resistance in industrial applications like steelmaking. Classified under 6902.20.50 as refractory ceramic constructional goods other than siliceous fossil meals.
Alumina-Silica Refractory Block
Dense refractory blocks with a mixture of >50% Al2O3 and SiO2, fired for lining blast furnaces and incinerators. They withstand extreme temperatures and chemical erosion in metallurgical processes. Falls under 6902.20.50 as 'other' refractory bricks/blocks beyond basic siliceous types.
Magnesia-Alumina Refractory Brick
Refractory bricks blending >50% Al2O3 with magnesia for basic oxygen furnace linings, fired to high temperatures. Offers superior slag resistance in steel production. HTS 6902.20.50 applies to these 'other' high-alumina/silica content refractory bricks.
Silica-Alumina Anchor Brick
Specialty anchor bricks with >50% SiO2 and Al2O3 mixture, fired for securing fiber modules in industrial furnaces. Designed for high-temperature suspension systems. Classified in 6902.20.50 as other refractory constructional bricks.
High-Purity Alumina Refractory Tile
Fired ceramic tiles with >70% Al2O3 content for lining rotary kilns in cement production. Provides abrasion resistance at temperatures over 1600°C. HTS 6902.20.50 covers these as 'other' refractory tiles.
Checker Refractory Brick
Honeycomb-structured bricks with >50% alumina-silica composition, fired for heat recuperators in glass furnaces. Enables efficient heat recovery through alternating passageways. 6902.20.50 classification for these specialized refractory bricks.
Slide Gate Refractory Block
Precision-fired blocks with high alumina content (>60% Al2O3) for molten steel slide gate valves in continuous casting. Resists thermal shock and erosion from liquid metal. Covered by 6902.20.50 as other refractory constructional blocks.
Ladle Refractory Brick
High-alumina bricks fired for steel ladle working linings, containing >55% Al2O3 for molten steel containment. Designed for multiple heat cycles with erosion resistance. HTS 6902.20.50 for these 'other' refractory bricks.
Rotary Kiln Alumina Brick
Phosphate-bonded alumina bricks (>70% Al2O3) fired for cement rotary kiln burning zones. Resists alkali attack and coating formation. 6902.20.50 classification as other high-alumina refractory bricks.
Glass Furnace Silica Brick
Fused silica bricks (>95% SiO2) fired for glass tank furnace crowns and walls. Excellent creep resistance at 1500°C+. HTS 6902.20.50 for high-silica refractory constructional bricks.