Magnesia Refractory Brick for Steel Ladles
High-purity magnesite bricks containing over 90% MgO, fired after shaping for use in lining steel ladles. These refractory bricks withstand extreme temperatures above 1700°C and resist molten steel slag. Classified under HTS 6902.10.10.00 due to magnesite composition exceeding 50% MgO by weight.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing chromite with Cr2O3
Bricks with significant chromium oxide shift to chromite-magnesite category when Cr2O3 exceeds threshold alongside MgO.
If lower purity or dolomite-based
Dolomite or lower MgO content bricks fall under other refractory types not meeting >50% MgO/CaO/Cr2O3 criteria.
If for non-refractory construction use
If not designed for high-temperature refractory service, classifies as ceramic building bricks.
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Import Tips & Compliance
• Verify MgO content certificate exceeds 50% by weight per lab analysis (ASTM standards)
• Ensure firing temperature documentation above 800°C
• Avoid misclassification as building bricks under 6904
Related Products under HTS 6902.10.10.00
Direct-Bonded Magnesite Brick for Electric Arc Furnaces
Direct-bonded magnesite refractory bricks with >93% MgO for electric arc furnace (EAF) walls, fired at high temperatures for superior slag resistance. These maintain structural integrity under thermal shock and corrosion. HTS 6902.10.10.00 applies for magnesite-dominant composition.
Magnesia-Chrome Brick for Non-Ferrous Metal Smelting
Magnesia-chrome refractory bricks with >50% combined MgO and Cr2O3 for copper and aluminum smelting furnaces. Fired ceramic goods resist basic slags and high temperatures. Fits HTS 6902.10.10.00 for magnesite bricks meeting elemental oxide criteria.
High-Density Magnesite Brick for Cement Rotary Kilns
High-density magnesite bricks (>90% MgO) for transition and burning zones in cement rotary kilns, fired for alkali and abrasion resistance. Essential for high-temperature clinker production environments. Classified in 6902.10.10.00 as magnesite refractory constructional goods.
Fused Magnesia Brick for Glass Tank Regenerators
Fused magnesite refractory bricks with electrofused grains for glass tank regenerator checkers, providing superior thermal shock resistance. Fired after shaping from high-purity magnesia. HTS 6902.10.10.00 due to >50% MgO content as refractory bricks.
Magnesia Ramming Mix Brick for Induction Furnaces
Pre-formed magnesite bricks from ramming mixes for coreless induction furnace linings, fired to >1600°C service limit. High MgO content resists molten iron attack. Meets 6902.10.10.00 for magnesite refractory bricks.
Magnesia-Carbon Brick for Steel Ladle Impact Pads
Magnesia-carbon refractory bricks for steel ladle impact zones, combining >80% MgO with graphite for erosion resistance. Fully fired ceramic constructional goods. Classifies under HTS 6902.10.10.00 based on predominant magnesite matrix.