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Refractory bricks, blocks, tiles and similar refractory ceramic constructional goods, other than those of siliceous fossil meals or similar siliceous earths. > Other > Other
Duty Rate (from China)
Subheadings
Products classified under Tariff item 6902.90.00
90% Alumina Refractory Bricks
90% alumina refractory bricks are high-purity ceramic constructional goods fired after shaping, designed for critical zones in aluminum smelters and cement kilns. Their high fired density and resistance to molten metal and alkali corrosion qualify them as refractory ceramic products under this tariff item.
Andalusite Refractory Bricks
Andalusite refractory bricks are fired ceramic constructional goods that incorporate andalusite to form mullite, offering excellent thermal shock resistance for coke ovens and reheat furnaces. Their dimensional stability and high-temperature performance place them under this tariff item for other refractory bricks.
Bauxite-Based Refractory Bricks
Bauxite-based refractory bricks are fired ceramic constructional goods made from calcined bauxite aggregate, providing economical high-duty performance for rotary cement kilns. Their spinel bonding developed during firing enhances slag penetration resistance, classifying them under this tariff item.
Chrome-Magnesite Refractory Bricks
Chrome-magnesite refractory bricks are fired ceramic constructional goods blending chrome ore with dead-burned magnesite, offering superior resistance to ferrous slags in electric arc furnaces. Their balanced properties for steel ladle linings qualify them as other refractory bricks under this tariff item.
Direct-Bonded Magnesia Refractory Bricks
Direct-bonded magnesia refractory bricks are fired ceramic constructional goods achieving high purity through high-temperature firing that creates ceramic bonding between periclase grains. Used in converter mouths and hot metal ladles, they fall under this tariff item for other refractory bricks.
Electrocast Refractory Blocks (Brick Size)
Electrocast refractory blocks in brick size are fired ceramic constructional goods melted and cast via electric arc, producing a bubble-free high-alumina structure for glass crown applications. Their seamless microstructure and standard brick dimensions classify them under this tariff item.
Fireclay Refractory Bricks
Fireclay refractory bricks are fired ceramic constructional goods made from high-temperature-fired clay with 30-45% alumina, serving as general-purpose linings in boilers and incinerators. Their cost-effective thermal insulation and slag resistance place them under this tariff item.
High Alumina Refractory Bricks
High alumina refractory bricks are fired ceramic products composed primarily of aluminum oxide, designed to withstand temperatures exceeding 1700°C. Used in furnace linings and kilns for superior thermal performance, they qualify as other refractory bricks under this tariff item.
Insulating Firebrick (IFB) 26 Grade
IFB 26 grade insulating firebricks are fired ceramic constructional goods with low thermal conductivity due to high porosity, made from clay-kaolin mixes for backup furnace insulation. Their service limit around 1430°C makes them suitable for energy-efficient linings under this tariff item.
Low Porosity Fireclay Bricks
Low porosity fireclay bricks are fired ceramic constructional goods that minimize slag penetration in blast furnace stove checkers through a dense vitrified structure from high firing. Their balance of insulation and strength classifies them under this tariff item for other refractory bricks.
Magnesia Chrome Refractory Bricks
Magnesia chrome refractory bricks are fired ceramic constructional goods combining magnesium oxide and chromite for extreme resistance to basic slags in steelmaking furnaces. Maintaining structural integrity up to 2000°C, they fall under this tariff item for other refractory bricks.
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. Their enhanced strength at elevated temperatures qualifies them as other refractory bricks under this tariff item.
Silicon Carbide Refractory Bricks
Silicon carbide refractory bricks are fired ceramic constructional goods featuring SiC grains bonded in a fired ceramic matrix, offering excellent thermal conductivity and abrasion resistance for blast furnace applications. Their durability in aggressive environments places them under this tariff item.
Silimanite Refractory Bricks
Silimanite refractory bricks are fired ceramic constructional goods using high-alumina sillimanite minerals for creep-resistant performance in glass tank regenerator checkers. Their fired structure handles 1600°C+ with minimal deformation, classifying them under this tariff item.
Zirconia Refractory Bricks
Zirconia refractory bricks are fired ceramic constructional goods utilizing stabilized zirconium oxide for ultra-high temperature resistance in glass melting tanks and petrochemical reactors. Their low thermal expansion prevents cracking under cyclic heating, qualifying them under this tariff item.