Alumina
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: > Bricks > Alumina
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)
Products classified under HTS 6902.20.10.10
High-Alumina Firebrick
High-alumina firebrick containing over 50% alumina (Al2O3), fired after shaping for high-temperature resistance. Used in furnaces and kilns for lining to withstand extreme heat. Classifies under 6902.20.10.10 as refractory bricks made primarily of alumina.
Kiln Car Alumina Brick
Heavy-duty alumina bricks (>50% Al2O3) for kiln car tops and supports in ceramic firing kilns. Provides structural stability at high temperatures post-firing. Classed as alumina refractory bricks in 6902.20.10.10.
Glass Tank Alumina Furnace Brick
Alumina-rich (>50% Al2O3) bricks for glass melting tank furnaces, offering resistance to molten glass corrosion. Refractory constructional ceramics fired after shaping. HTS 6902.20.10.10 specific to alumina bricks.
Phosphate-Bonded Alumina Brick
Refractory bricks using phosphate binders with >50% alumina for improved strength in backup linings. Meets Chapter 69 firing requirements using inorganic nonmetallic materials. Alumina brick classification 6902.20.10.10.
90% Alumina Refractory Brick
Refractory brick composed of 90% alumina for superior thermal shock resistance in high-heat environments. Fired ceramic constructional good shaped for boiler and incinerator linings. Fits 6902.20.10.10 due to high alumina content and refractory brick designation.
Blast Furnace Alumina Brick
Dense alumina bricks designed for blast furnace linings, with >50% Al2O3 for corrosion resistance against molten metal. Refractory ceramic goods fired after shaping per Chapter 69 definitions. Specifically 'alumina' bricks under 6902.20.10.10.
Rotary Kiln Alumina Lining Brick
Specialized bricks with high alumina content for lining rotary cement kilns, resisting abrasion and alkali attack. Fired inorganic nonmetallic ceramic per chapter definition. Imports under 6902.20.10.10 as alumina bricks.