Silimanite Refractory Brick
Silimanite refractory bricks feature sillimanite minerals for high refractoriness in electric arc furnace roofs. Dense fired structure resists molten metal penetration. HTS 6902.90.10.20 for other refractory brick types.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If other non-refractory construction goods
Lacking refractory properties, moves to general ceramic constructionals in 6903.
If porcelain crucibles or lab dishes
Low-absorption, translucent fired ware for labs classifies as porcelain in 6909.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Certify mineral content via petrographic analysis to distinguish from high-alumina types
• Ship in palletized configurations with dunnage to prevent breakage, aiding customs inspection
• For pre-assembled arch shapes, consider if 'articles' under 6902.90.90 applies over bricks
Related Products under HTS 6902.90.10.20
High-Alumina Refractory Firebrick
High-alumina refractory firebricks are composed primarily of alumina and silica, fired at high temperatures to withstand extreme heat above 1500°C. They are used in furnace linings and kilns for their excellent thermal shock resistance and durability. Classified under HTS 6902.90.10.20 as refractory bricks other than those made from siliceous fossil meals.
Silico-Aluminous Refractory Brick
Silico-aluminous refractory bricks blend silica and alumina for use in blast furnace hearths and checker chambers, fired to achieve low porosity and high strength. They resist slag corrosion and thermal cycling in metallurgical applications. Fits HTS 6902.90.10.20 as 'other' refractory bricks excluding siliceous fossil meal types.
Mullite Refractory Brick
Mullite refractory bricks, made from sintered mullite (3Al2O3·2SiO2), offer superior creep resistance for glass tank regenerator checkers and rotary kilns. Fired after shaping to ensure impermeability to gases. Covered by HTS 6902.90.10.20 for other refractory bricks.
Andalusite Refractory Brick
Andalusite refractory bricks incorporate andalusite for enhanced thermal shock resistance, ideal for coke oven doors and reheat furnace roofs. Fired ceramic goods shaped from clay-silica mixes. HTS 6902.90.10.20 applies to these non-specialty refractory bricks.
Fireclay Refractory Brick
Fireclay refractory bricks from high-alumina fireclay provide economical lining for boiler walls and ladles, with good abrasion resistance. Properly fired after room-temperature shaping per Chapter 69 requirements. Classed in HTS 6902.90.10.20 as other refractory bricks.
Kaolin-Based Refractory Brick
Kaolin-based refractory bricks utilize calcined kaolin for moderate-temperature applications like backup linings in cement kilns. Fired ceramic constructional goods meeting Chapter 69 criteria. Under HTS 6902.90.10.20.