Bricks
Refractory bricks, blocks, tiles and similar refractory ceramic constructional goods, other than those of siliceous fossil meals or similar siliceous earths: > Other: > Bricks
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 6902.90.10
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.
Bauxite-Based Refractory Bricks
Bauxite-based refractory bricks from calcined bauxite aggregate provide economical high-duty performance for rotary cement kilns. Fired to develop spinel bonding for slag penetration resistance. Classed under HTS 6902.90.10 'other' bricks.
Direct-Bonded Magnesia Refractory Bricks
Direct-bonded magnesia refractory bricks achieve superior purity through high-temperature firing that creates ceramic bonding between periclase grains. Used in converter mouths and hot metal ladles. HTS 6902.90.10 for advanced bonding technology bricks.
Low Porosity Fireclay Bricks
Low porosity fireclay refractory bricks minimize slag penetration in blast furnace stove checkers through dense vitrified structure from high firing. Balance insulation with strength. Standard classification HTS 6902.90.10.
Electrocast Refractory Blocks (Brick Size)
Electrocast refractory bricks sized for standard bricklaying, melted and cast via electric arc for bubble-free high-alumina structure in glass crown applications. Seamless microstructure. Treated as bricks under HTS 6902.90.10.
Phosphate-Bonded High Alumina Bricks
Phosphate-bonded high alumina refractory bricks use phosphoric acid binders fired to develop mullite-phosphate bonds for abrasion resistance in cyclone burners. Enhanced strength at elevated temperatures. HTS 6902.90.10 classification.
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.
Silicon Carbide Refractory Bricks
Silicon carbide refractory bricks feature SiC grains bonded in a fired ceramic matrix, offering excellent thermal conductivity and abrasion resistance for blast furnace applications. They endure high wear in aggressive environments. Fits HTS 6902.90.10 for non-siliceous fossil meal refractory bricks.
Fireclay Refractory Bricks
Fireclay refractory bricks, made from high-temperature-fired clay with 30-45% alumina, serve as general-purpose linings in boilers and incinerators. They provide cost-effective thermal insulation and slag resistance. Classified in HTS 6902.90.10 as standard 'other' refractory bricks.
Zirconia Refractory Bricks
Zirconia refractory bricks utilize stabilized zirconium oxide for ultra-high temperature resistance in glass melting tanks and petrochemical reactors. Their low thermal expansion prevents cracking under cyclic heating. HTS 6902.90.10 includes these advanced 'other' refractory bricks.